CN111909734A - Method for removing organic sulfur from blast furnace gas - Google Patents

Method for removing organic sulfur from blast furnace gas Download PDF

Info

Publication number
CN111909734A
CN111909734A CN202010727285.4A CN202010727285A CN111909734A CN 111909734 A CN111909734 A CN 111909734A CN 202010727285 A CN202010727285 A CN 202010727285A CN 111909734 A CN111909734 A CN 111909734A
Authority
CN
China
Prior art keywords
blast furnace
furnace gas
gas
organic sulfur
regeneration
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202010727285.4A
Other languages
Chinese (zh)
Inventor
陈茂荣
朱颖
马从生
马勇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
State Power Investment Corp Yuanda Environmental Protection Equipment Manufacturing Co ltd
Original Assignee
State Power Investment Corp Yuanda Environmental Protection Equipment Manufacturing Co ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by State Power Investment Corp Yuanda Environmental Protection Equipment Manufacturing Co ltd filed Critical State Power Investment Corp Yuanda Environmental Protection Equipment Manufacturing Co ltd
Priority to CN202010727285.4A priority Critical patent/CN111909734A/en
Publication of CN111909734A publication Critical patent/CN111909734A/en
Pending legal-status Critical Current

Links

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
    • 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
    • C10K1/16—Purifying combustible gases containing carbon monoxide by washing with liquids; Reviving the used wash liquors with non-aqueous liquids

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)
  • Industrial Gases (AREA)
  • Treating Waste Gases (AREA)

Abstract

The invention relates to a method for removing organic sulfur in blast furnace gas, which is characterized by comprising the following steps: step S1, primary filtering of blast furnace gas; step S2, absorption by an absorption tower; step S3, analysis and regeneration; step S4, analysis and regeneration are performed again. The invention also discloses the desulfurized blast furnace gas prepared by the method for removing the organic sulfur from the blast furnace gas. The method for removing the organic sulfur in the blast furnace gas has the advantages of simple process, easy operation, suitability for continuous large-scale production, capability of quickly, safely and efficiently removing the organic sulfur in the blast furnace gas, good removing effect, high efficiency and small secondary pollution, and can realize organic unification of economic benefit, social benefit and ecological benefit.

Description

Method for removing organic sulfur from blast furnace gas
Technical Field
The invention relates to the technical field of blast furnace gas purification, in particular to a method for removing organic sulfur from blast furnace gas.
Background
Blast furnace iron making is one of the important processes of modern steel production, reducing agents used by an iron making blast furnace are coke, coal, heavy oil and the like, air blast is used for producing reducing agents CO and providing high-temperature heat, and because the nitrogen content in the air is very high, the CO in the reducing gas is diluted, the CO content in blast furnace gas is low, the nitrogen content is high, and the typical blast furnace gas contains CO: 24 to 26 percent; CO 22 14-16％； H2 1-2％；CH4 0.3-0.8％；N256-59 percent. Heat value: 3200-4000kJ/Nm3(ii) a In addition, H is also present in the blast furnace gas2S、 COS、SO2、SO3And the like. The sulfide-containing blast furnace gas is directly used as fuel of a power plant boiler, an iron-making plant hot blast stove and a steel-making plant heating furnace without being subjected to desulfurization treatment, SO SO is caused in the flue gas emission of the power plant boiler, the iron-making plant hot blast stove and the steel-making plant heating furnace2The content of the SO in the flue gas can not meet the national ultra-clean emission requirement, and the SO in the flue gas is generally emitted2The content is more than 50mg/m3Some production plants discharge SO in flue gas2Even up to 250mg/m3Above all, it poses a serious threat to the environment and the health of people.
In order to solve these problems, many efforts have been made by researchers in the industry, focusing their attention on how to perform an efficient desulfurization process. The traditional acid-base neutralization desulfurization process cannot be efficiently removed, and the environmental protection investment of high-gas users such as subsequent hot blast stoves, sintering machines, pellet furnaces, heating furnaces, boiler power generation and the like can be increased. At present, the mature method is to arrange a wet washing device behind a TRT device for removing the acid gas, and the method can effectively remove the acid gas H in the blast furnace gas2S、SO2、SO3The COS in the blast furnace gas cannot be removed, SO in the flue gas after combustion2The content exceeds the standard. The other method is to desulfurize in the flue gas, but because the volume of the flue gas after combustion is increased by several times, and the temperature and the pressure are high, the flue gas desulfurization has the defects of huge equipment, large water consumption, high removal cost, secondary pollution and the like due to the fact that circulating water needs to be treated independently.
Therefore, the development of a treatment technology for the front-mounted organic sulfur removal of blast furnace gas has great significance for realizing the standard emission of the blast furnace gas and reducing the rear-mounted desulfurization investment and the operation cost of a blast furnace gas user.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provide a method for removing organic sulfur from blast furnace gas, which has the advantages of simple process, easy operation, suitability for continuous large-scale production, capability of quickly, safely and efficiently removing organic sulfur from blast furnace gas, good removal effect, high efficiency, small secondary pollution and capability of realizing organic unification of economic benefit, social benefit and ecological benefit.
In order to achieve the purpose, the invention adopts the technical scheme that:
the method for removing organic sulfur from blast furnace gas is characterized by comprising the following steps of:
step S1, primary filtering of blast furnace gas: primarily filtering blast furnace gas by a dry cloth bag dust removal device, and removing dust and purifying;
step S2, absorption by an absorption tower: the blast furnace gas after the preliminary filtration in the step S1 is sent into an absorption tower, and is subjected to gas-liquid mass transfer reaction with a special amine solvent in a multi-section filler in the absorption tower, so that H in the gas2S and carbonyl sulfide (COS) are absorbed by a solvent to form a rich solution;
step S3, analysis and reproduction: sending a certain amount of rich liquor prepared in the step S2 to a regeneration tower through a rich liquor pump for desorption and regeneration, sending the residual rich liquor to the middle part of an absorption tower for cyclic utilization, and discharging the purified low-sulfur coal gas to combustion equipment;
step S4, analysis and regeneration again: in the regeneration tank of the regeneration tower, a reboiler is adopted to heat the solution to a certain temperature for gasification, and the gas containing high-concentration inorganic sulfide is separated out, and the high-concentration gas enters a sulfur recovery device.
Further, the blast furnace gas dedusted by the bag-type dedusting device in the step S1 passes through a purifying furnace filled with a protective agent, so as to further remove dust in the blast furnace gas and remove chlorine.
Preferably, the protective agent is at least one of neutral alumina, magnesia-alumina spinel and high alumina ceramic ball.
Preferably, the special amine solvent in step S2 is at least one of N, N-dimethyl-1, 3-propanediamine, N-tallow-dipropyl triamine, and N-oleyl-1, 3-propanediamine.
Preferably, the amount in step S3 is 1/7-1/13 of the total weight of the rich solution.
Preferably, the certain temperature in step S4 is 120-150 ℃.
Another object of the present invention is to provide a desulfurized blast furnace gas produced according to the method for removing organic sulfur from blast furnace gas.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the method for removing the organic sulfur in the blast furnace gas has the advantages of simple process, easy operation, suitability for continuous large-scale production, capability of quickly, safely and efficiently removing the organic sulfur in the blast furnace gas, good removing effect, high efficiency and small secondary pollution, and can realize organic unification of economic benefit, social benefit and ecological benefit.
Detailed Description
The method for removing organic sulfur from blast furnace gas is characterized by comprising the following steps of:
step S1, primary filtering of blast furnace gas: primarily filtering blast furnace gas by a dry cloth bag dust removal device, and removing dust and purifying;
step S2, absorption by an absorption tower: the blast furnace gas after the preliminary filtration in the step S1 is sent into an absorption tower, and is subjected to gas-liquid mass transfer reaction with a special amine solvent in a multi-section filler in the absorption tower, so that H in the gas2S and carbonyl sulfide (COS) are absorbed by a solvent to form a rich solution;
step S3, analysis and reproduction: sending a certain amount of rich liquor prepared in the step S2 to a regeneration tower through a rich liquor pump for desorption and regeneration, sending the residual rich liquor to the middle part of an absorption tower for cyclic utilization, and discharging the purified low-sulfur coal gas to combustion equipment;
step S4, analysis and regeneration again: in the regeneration tank of the regeneration tower, a reboiler is adopted to heat the solution to a certain temperature for gasification, and the gas containing high-concentration inorganic sulfide is separated out, and the high-concentration gas enters a sulfur recovery device.
Further, the blast furnace gas dedusted by the bag-type dedusting device in the step S1 passes through a purifying furnace filled with a protective agent, so as to further remove dust in the blast furnace gas and remove chlorine.
Preferably, the protective agent is at least one of neutral alumina, magnesia-alumina spinel and high alumina ceramic ball.
Preferably, the special amine solvent in step S2 is at least one of N, N-dimethyl-1, 3-propanediamine, N-tallow-dipropyl triamine, and N-oleyl-1, 3-propanediamine.
Preferably, the amount in step S3 is 1/7-1/13 of the total weight of the rich solution.
Preferably, the certain temperature in step S4 is 120-150 ℃.
Another object of the present invention is to provide a desulfurized blast furnace gas produced according to the method for removing organic sulfur from blast furnace gas.
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the method for removing the organic sulfur in the blast furnace gas has the advantages of simple process, easy operation, suitability for continuous large-scale production, capability of quickly, safely and efficiently removing the organic sulfur in the blast furnace gas, good removing effect, high efficiency and small secondary pollution, and can realize organic unification of economic benefit, social benefit and ecological benefit.
The invention will be further described with reference to specific examples, but the scope of protection of the invention is not limited thereto:
example 1
Embodiment 1 provides a method for removing organic sulfur from blast furnace gas, which is characterized by comprising the following steps:
step S1, primary filtering of blast furnace gas: primarily filtering blast furnace gas by a dry cloth bag dust removal device, and removing dust and purifying;
step S2, absorption by an absorption tower: the blast furnace gas after the preliminary filtration in the step S1 is sent into an absorption tower, and is subjected to gas-liquid mass transfer reaction with a special amine solvent in a multi-section filler in the absorption tower, so that H in the gas2S and carbonyl sulfide (COS) are absorbed by a solvent to form a rich solution;
step S3, analysis and reproduction: sending a certain amount of rich liquor prepared in the step S2 to a regeneration tower through a rich liquor pump for desorption and regeneration, sending the residual rich liquor to the middle part of an absorption tower for cyclic utilization, and discharging the purified low-sulfur coal gas to combustion equipment;
step S4, analysis and regeneration again: in the regeneration tank of the regeneration tower, a reboiler is adopted to heat the solution to a certain temperature for gasification, and the gas containing high-concentration inorganic sulfide is separated out, and the high-concentration gas enters a sulfur recovery device.
The blast furnace gas dedusted by the cloth bag dedusting device in the step S1 passes through a purifying furnace filled with a protective agent, so that dust in the blast furnace gas is further removed and chlorine is removed; the protective agent is neutral alumina.
In step S2, the special amine solvent is N, N-dimethyl-1, 3-propanediamine.
In step S3, the amount is 1/7 of the total weight of the rich solution.
The certain temperature in step S4 is 120 ℃.
A desulfurized blast furnace gas produced according to the method for removing organic sulfur from blast furnace gas.
Example 2
Example 2 provides a blast furnace gas organosulfur removal process that is substantially the same as example 1 except that the protective agent is magnesium aluminate spinel; in the step S2, the special amine solvent is N-tallow dipropyl triamine; the amount in the step S3 is 1/8 of the total weight of the rich liquid; the certain temperature in step S4 is 130 ℃.
Example 3
Embodiment 3 provides a method for removing organic sulfur from blast furnace gas, which is substantially the same as embodiment 1, except that the protective agent is high alumina ceramic balls; in the step S2, the special amine solvent is N-oleyl-1, 3-propane diamine; the amount in the step S3 is 1/9 of the total weight of the rich liquid; the certain temperature in step S4 is 135 ℃.
Example 4
Embodiment 4 provides a method for removing organic sulfur from blast furnace gas, which is basically the same as embodiment 1, except that the protective agent is formed by mixing neutral alumina, magnesia alumina spinel and high alumina porcelain balls according to the mass ratio of 1:2: 3; the special amine solvent in the step S2 is formed by mixing N, N-dimethyl 1, 3-propane diamine, N-tallow dipropyl triamine and N-oleyl-1, 3-propane diamine according to the mass ratio of 2:1: 1; the amount in the step S3 is 1/10 of the total weight of the rich liquid; the certain temperature in step S4 is 135 ℃.
Example 5
Example 5 provides a blast furnace gas organosulfur removal process that is essentially the same as example 1, except that the protective agent is neutral alumina; in the step S2, the special amine solvent is N-tallow dipropyl triamine; the amount in the step S3 is 1/12 of the total weight of the rich liquid; the certain temperature in step S4 is 140 ℃.
Comparative example 1
Comparative example 1 provides a blast furnace gas organic sulfur removal method, which is substantially the same as example 1, except that there is no step S1, blast furnace gas preliminary filtration.
Comparative example 2
Comparative example 2 provides a blast furnace gas organic sulfur removal method, which is substantially the same as example 1 except that a saturated sodium carbonate solution is used instead of a specific amine solvent.
Comparative example 3
Comparative example 3 provides a blast furnace gas organic sulfur removal process that is essentially the same as example 1, except that no protectant is added.
To further illustrate the beneficial technical effects of the embodiments, the removal rate of organic sulfur in the desulfurized blast furnace gas produced by the method for removing organic sulfur from blast furnace gas described in the above examples 1-5 and comparative examples 1-3 is such that the total sulfur content in the purified gas and the SO generated after combustion of the purified gas are adjusted2The content was tested, the test results are shown in table 1, and the test methods were according to the corresponding national standards.
As can be seen from Table 1, the removal rate of organic sulfur in the blast furnace gas by the method of the embodiment of the invention is more than or equal to 90%, so that the total sulfur content in the purified gas is less than or equal to 25mg/Nm3Purifying SO generated after gas combustion2≤30mg/Nm3. These data, which are clearly superior to the comparative examples, are the result of the synergy of the steps.
TABLE 1
Test items Organic sulfur removal rate Total sulfur content in coal gas Purifying SO generated after gas combustion2
Unit of ％ mg/Nm3 mg/Nm3
Example 1 90 25 30
Example 2 92 23 25
Example 3 93 20 23
Example 4 95 19 21
Example 5 96 17 18
Comparative example 1 84 30 37
Comparative example 2 75 45 43
Comparative example 3 81 29 35
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (7)

1. The method for removing organic sulfur from blast furnace gas is characterized by comprising the following steps of:
step S1, primary filtering of blast furnace gas: primarily filtering blast furnace gas by a dry cloth bag dust removal device, and removing dust and purifying;
step S2, absorption by an absorption tower: the blast furnace gas after the preliminary filtration in the step S1 is sent into an absorption tower, and is subjected to gas-liquid mass transfer reaction with a special amine solvent in a multi-section filler in the absorption tower, so that H in the gas2S and carbonyl sulfide (COS) are absorbed by a solvent to form a rich solution;
step S3, analysis and reproduction: sending a certain amount of rich liquor prepared in the step S2 to a regeneration tower through a rich liquor pump for desorption and regeneration, sending the residual rich liquor to the middle part of an absorption tower for cyclic utilization, and discharging the purified low-sulfur coal gas to combustion equipment;
step S4, analysis and regeneration again: in the regeneration tank of the regeneration tower, a reboiler is adopted to heat the solution to a certain temperature for gasification, and the gas containing high-concentration inorganic sulfide is separated out, and the high-concentration gas enters a sulfur recovery device.
2. The method for removing organic sulfur from blast furnace gas as claimed in claim 1, wherein the blast furnace gas dedusted by the bag dust collector in step S1 passes through a purifying furnace filled with a protective agent to further remove dust and chlorine from the blast furnace gas.
3. The method for removing organic sulfur from blast furnace gas as claimed in claim 2, wherein the protective agent is at least one of neutral alumina, magnesia alumina spinel and high alumina porcelain ball.
4. The method for removing organic sulfur from blast furnace gas according to claim 1, wherein the specific amine solvent in step S2 is at least one of N, N-dimethyl-1, 3-propanediamine, N-tallow-dipropyltrimethyleriamine, and N-oleyl-1, 3-propanediamine.
5. The method for removing organic sulfur from blast furnace gas as claimed in claim 1, wherein the amount in step S3 is 1/7-1/13 of the total weight of the rich liquid.
6. The method as claimed in claim 1, wherein the certain temperature in step S4 is 120-150 ℃.
7. A desulfurized blast furnace gas produced by the blast furnace gas organic sulfur removal method according to any one of claims 1 to 6.
CN202010727285.4A 2020-07-24 2020-07-24 Method for removing organic sulfur from blast furnace gas Pending CN111909734A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010727285.4A CN111909734A (en) 2020-07-24 2020-07-24 Method for removing organic sulfur from blast furnace gas

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010727285.4A CN111909734A (en) 2020-07-24 2020-07-24 Method for removing organic sulfur from blast furnace gas

Publications (1)

Publication Number Publication Date
CN111909734A true CN111909734A (en) 2020-11-10

Family

ID=73280671

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010727285.4A Pending CN111909734A (en) 2020-07-24 2020-07-24 Method for removing organic sulfur from blast furnace gas

Country Status (1)

Country Link
CN (1) CN111909734A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112430480A (en) * 2020-11-13 2021-03-02 上海逐源机械科技有限公司 Gas fine desulfurization method
CN113318586A (en) * 2021-06-09 2021-08-31 华东理工大学 Application of amine compound in improvement of organic sulfur dissolution and absorption removal
CN113604258A (en) * 2021-08-18 2021-11-05 国家电投集团远达环保装备制造有限公司 Coke oven gas desulfurization method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112430480A (en) * 2020-11-13 2021-03-02 上海逐源机械科技有限公司 Gas fine desulfurization method
CN112430480B (en) * 2020-11-13 2021-10-01 上海逐源机械科技有限公司 Gas fine desulfurization method
CN113318586A (en) * 2021-06-09 2021-08-31 华东理工大学 Application of amine compound in improvement of organic sulfur dissolution and absorption removal
CN113318586B (en) * 2021-06-09 2022-07-19 华东理工大学 Application of amine compound in improvement of organic sulfur dissolution and absorption removal
CN113604258A (en) * 2021-08-18 2021-11-05 国家电投集团远达环保装备制造有限公司 Coke oven gas desulfurization method

Similar Documents

Publication Publication Date Title
CN111909734A (en) Method for removing organic sulfur from blast furnace gas
CN109794146B (en) Grate-rotary kiln SNCR/SCR denitration and active coke desulfurization combined system and process
CN104689679B (en) Desulfurization and denitrification process for coke oven flue gas
CN112915777A (en) Blast furnace gas dechlorination, desulfurization and purification process
CN101274204A (en) Absorbing agent for removing and recovering sulfur dioxide from gaseous mixture
CN206646064U (en) A kind of dry coke quenching auxiliary
CN106984169B (en) Denitration system and method directly utilizing heat of sinter
CN203781842U (en) New sulfur recovery device
CN107213787A (en) A kind of desulfurizing agent and preparation method thereof
CN105214478A (en) The integral process of a kind of coke oven flue exhuast gas desulfurization denitration and waste heat recovery
CN112593034B (en) Dry-method cooperative deacidification system and method for blast furnace clean gas
CN103303877A (en) Comprehensive multi-gas source low-concentration SO2 fume recycling acid-making technological process
CN103170223A (en) Rotational flow strengthening method and device for purifying sulfur production tail gases by Claus method
CN101301560B (en) Comprehensive utilization method of sintered pollutant
CN107115775B (en) Iron ore sintering flue gas sectional enrichment self-heat exchange emission reduction SOxAnd NOxMethod of producing a composite material
CN111847381B (en) Method and device for preparing hydrogen from industrial waste gas
CN101396635A (en) Semi-gas desulfurization technological process of flue gas of sinter machine
CN103693643A (en) Bamboo-based activated carbon for flue gas desulfurization
CN112063856B (en) Side-blown furnace for nickel-containing sludge treatment, flue gas treatment system and treatment method
CN110746995B (en) Gasification pyrolysis system for recycling flue gas and application thereof
CN102954476A (en) Processing method of tail gas containing trace organic constituents
CN103691259A (en) Energy-saving and water-saving purification system for processing smoke by using wet process and energy-saving and water-saving purification process
CN108707718A (en) It is a kind of using high temperature coal gas of converter and to improve the device and its application method of calorific value
CN102719280A (en) Calcium carbide furnace gas purifying method
CN113930262B (en) Blast furnace gas reduction desulfurization process based on biomass high-temperature pyrolysis

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination