CN101575653A - Method and device for separating carbon dioxide to improve mass energy of blast furnace gas - Google Patents
Method and device for separating carbon dioxide to improve mass energy of blast furnace gas Download PDFInfo
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- CN101575653A CN101575653A CNA2009100868634A CN200910086863A CN101575653A CN 101575653 A CN101575653 A CN 101575653A CN A2009100868634 A CNA2009100868634 A CN A2009100868634A CN 200910086863 A CN200910086863 A CN 200910086863A CN 101575653 A CN101575653 A CN 101575653A
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- blast furnace
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- carbon dioxide
- carbonic acid
- acid gas
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- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/10—Reduction of greenhouse gas [GHG] emissions
- Y02P10/122—Reduction of greenhouse gas [GHG] emissions by capturing or storing CO2
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- 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
- Y02P10/00—Technologies related to metal processing
- Y02P10/20—Recycling
Abstract
A method and a device for capturing, separating, recovering and recycling carbon dioxide in blast furnace gas provide an energy-saving technology which improves the mass energy of blast furnace gas and reduces the emission of carbon dioxide, and belong to the fields of iron and steel metallurgy as well as greenhouse gas emission reduction. The method and the device for recovering and separating the carbon dioxide in blast furnace gas consist of a gas processing system, an absorption tower, a regeneration tower, and a built-in boiling device, integrate a conventional blast furnace gas processing system, and are added with a chemical absorption system, thus leading the carbon dioxide in blast furnace gas to be captured, recovered and utilized; after partial external carbon dioxide is added, the recovered carbon dioxide is used for the gas carrier of fuel injected by a blast furnace and the blast of a hot blast furnace, and the entry of the carbon dioxide into the furnace promotes the chemical reaction in the blast furnace, thereby achieving the recycling utilization of the carbon dioxide in iron-making workshops of the blast furnace, improving the utilization rate of blast furnace gas, reducing the emission of carbon dioxide, and having significant social and environmental benefits.
Description
Technical field
The invention belongs to ferrous metallurgy and reduction of greenhouse gas discharge field, relate to collecting carbonic anhydride in a kind of blast furnace gas and separate method and apparatus with recycle and reuse, a kind of power-saving technology of improving mass energy of blast furnace gas and reducing Carbon emission is provided.
Background technology
The energy and environmental problem are just becoming the whole world and the each department focal issue of falling over each other to pay close attention to, the greenhouse gas emission problem is referred top priority.Iron And Steel Industry is the conventional industries of high logistics, high energy consumption, high pollution, is the industry of emphasis energy-saving and emission-reduction.Industry from carbon dioxide generating, there is 50% CO2 emissions to come from industrial production approximately, it is the first that the CO2 emissions of wherein thermal power generation industry occupy, the CO2 emissions of steel industry occupy time position, domestic Iron And Steel Industry Carbon emission accounts for 14% of the whole nation, iron-smelting process is the main source of Iron And Steel Industry Carbon emission, account for more than 90% of whole Steel Production Flow Chart CO2 emissions, China's steel industry Carbon emission accounts for about 50% of world steel industry, therefore, the carbon dioxide discharging that reduces Steel Plant is great to improving Significance for Environment, and China's economy and environment sustainable development are had great strategic importance.
Blast furnace gas is that coke changes after gasifying and gets in the blast furnace production.One ton of pig iron of every refining produces calorific value 3300～4100kJ/m
3Blast furnace gas 1500～2000m
3, blast furnace gas is because calorific value is lower, is mixed with mixed gas uses for the user except that part heat supply wind furnace and coke oven and with coke-oven gas, major part is all diffused, and is difficult to be used effectively, and has both wasted a large amount of energy, again severe contamination environment.The blast furnace gas recovery and utilization technology, fully excavating equipment potential, improve blast furnace gas recycling level safely and efficiently, become the common issue that domestic most steel mill faces.Because the increase of ironmaking production capacity, blast furnace gas output increases year by year, and blast furnace gas utilizes situation to allow of no optimist.Therefore, make full use of blast furnace gas and had crucial meaning.
At present, China does not also have the concrete Technology at carbon dioxide Separation and Recovery in the blast furnace gas, also be in theoretical research stage, the part industrialization that removes at the chemical industry carbonic acid gas, based on handling concentration of carbon dioxide difference in the gas, removal methods is also different, mainly contains methods such as absorption process, absorption method, condensation, membrane sepn.The present invention reclaims and separates carbonic acid gas in the blast furnace gas, mainly be conceived to reduce the circulation of Carbon emission and carbonic acid gas and be used for carrier gas of blast furnace blowing fuel and blast furnace blast, improve mass energy of blast furnace gas, improve the blast furnace gas utilization ratio, realize the recycle of blast furnace gas at blast furnace plant, reduce the discharging of greenhouse gases effectively, alleviate environmental stress, isolated in addition carbon monoxide enriched gas is metallurgical important origin of heat and fully is used.
Characteristics of the present invention are, integrated conventional blast furnace gas treatment system has been set up the chemical absorption system, make in the blast furnace gas carbonic acid gas obtain capturing and recycle, and reduce the discharging of greenhouse gases; Carbonic acid gas after the recovery and with addition of the external carbonic acid gas of part be used for the carrier gas of hotblast stove air blast and fuel injection, realize the recycle of blast furnace gas in the blast furnace ironmaking workshop, have the significant social environmental benefit.
Summary of the invention
The invention provides and a kind ofly from blast furnace gas, capture to reclaim separating carbon dioxide and circulation is used for blast furnace iron-smelting method and device, improved mass energy of blast furnace gas, make carbonic acid gas obtain recycle, improved the blast furnace gas utilization ratio, effectively reduce the discharging of greenhouse gases at blast furnace plant.
The inventive system comprises absorption tower, regenerator column, built-in boiling device, integrated conventional blast furnace gas treatment system has been set up the chemical absorption system, makes in the blast furnace gas carbonic acid gas obtain capturing and recycles; Reduce the discharging of greenhouse gases, unique biabsorption is arranged and is made the trapping system flexible operation reliable; Adopt built-in solution boiling device, reduced steam consumption.
After handling through dust-removal system, blast furnace gas links to each other with the bottom on absorption tower through blower fan pressurization back, flue gas is bottom-up to flow, with go into from top, absorption tower tower can absorbing carbon dioxide solution form counter current contact, remove the important thermal source that the flue gas behind the carbonic acid gas discharges as metallurgy through pipeline and be used for hotblast stove, coke oven, process furnace etc., the solution that has absorbed carbonic acid gas is entered by regenerator column top by force (forcing) pump, be provided with built-in boiling device in the regenerator column bottom, the air outlet, top of regenerator column links to each other with gas-liquid separator, the carbonic acid gas compression that carbonic acid gas after the separation can obtain with addition of the waste gas recycling back of various industrial furnaces is after the gas switching valve enters the hotblast stove of blast furnace air supply system and the carrier gas of blast furnace blowing fuel system is used for blast furnace ironmaking, realize the recycle in the blast furnace gas workshop, solution behind the desorb carbonic acid gas is flowed out by the regenerator column bottom, and circulation is as carbon dioxide absorption liquid.
Absorption tower of the present invention is made up of single tower of two serial or parallel connections, can single tower operation, double-column in series or parallel running; Built-in boiling device is set in the regenerator column, effectively reduces steam consumption.
It is to utilize alkaline absorbent solution to contact concurrent biochemical reaction with carbon dioxide reaction in the blast furnace gas that the present invention captures absorbing carbon dioxide, form unsettled salt, and unstable salt can reverse decomposition discharge carbonic acid gas under certain condition, thereby reaches carbonic acid gas Separation and Recovery from blast furnace gas.
Carbonic acid gas after the blast furnace gas Separation and Recovery replaces pressurized air and nitrogen as the fuel injection carrier gas with addition of the carbonic acid gas of the waste gas recycling back acquisition of various industrial furnaces, coal dust and plastic waste are sprayed in the blast furnace, coke gasification reaction in carbonic acid gas and the blast furnace generates carbon monoxide, plastic waste is the reaction that nytron deposits yields H2 and carbon monoxide participate in the reducing iron ore in the blast furnace, promoted the indirect reduction in the blast furnace, coal dust and plastic waste spray into the coke consumption that blast furnace has reduced blast-furnace smelting, the hydrogen reduction product is a water, reduces the generation of carbonic acid gas; But carbonic acid gas is also gone into blast furnace from the blast-furnace tuyere air blast after the preheating of instead of part air admission hotblast stove in addition, and the preheating iron ore promotes chemical reaction in the blast furnace, and high wind-warm syndrome has reduced the fuel consumption of blast furnace simultaneously.
Collecting carbonic anhydride separates carrier gas and the blast furnace blast that the back circulation is used for blast furnace blowing fuel in the blast furnace gas, realizes the recycle of blast furnace gas at blast furnace plant, has reduced the discharging of greenhouse gases effectively, has alleviated environmental stress; Isolated in addition carbon monoxide enriched gas is metallurgical important thermal source, can continue on for blast funnace hot blast stove preheated air, coke oven, station boiler and heater for rolling steel etc., has improved mass energy of blast furnace gas, has improved the blast furnace gas utilization ratio.
For 2000～5000m
3Blast furnace, Separation and Recovery carbonic acid gas utilization process in the blast furnace gas, ton iron reclaims coal gas 1300～4000m
3, reclaiming the carrier gas of separating carbon dioxide with absorption process as blast furnace blowing fuel, gas flow is 100～3000m
3/ min, pressure 0.1～3MPa; The hotblast stove of also available carbonic acid gas instead of part air admission blast furnace air supply system, gas flow is 2000～12000m
3/ min.
Carbonic acid gas is the main root of Greenhouse effect, be difficult to efficient recovery, and the byproduct of conduct steel-making and various industrial furnaces, its cost recovery is not high, nature also has a large amount of natural carbonic acid gas resources to exist, and wide material sources are with low cost, as external source of the gas, replace inert nitrogen and pressurized air carrier gas and part hot blast as blast furnace blowing fuel.
The invention has the advantages that, carbonic acid gas is with addition of the carbonic acid gas of the waste gas recycling back acquisition of various industrial furnaces, can also adopt the carrier gas of external carbonic acid gas replacement inert nitrogen and pressurized air as blast furnace blowing fuel, but also be used for blast furnace blast after the preheating of instead of part air admission hotblast stove and participate in blast furnace ironmaking, carbon reaction in carbonic acid gas and the blast furnace generates the indirect reduction that carbon monoxide promotes that blast furnace is interior, has reduced emission of carbon-dioxide.Carbon monoxide enriched gas after separating in addition fully is used as the important thermal source of metallurgy, has played positive effect for alleviating atmospheric Greenhouse effect, has significant environmental benefit.
Description of drawings
Fig. 1 utilizes process flow sheet for carbon dioxide recovery in the blast furnace gas of the present invention.
This patent comprises blast furnace 1, coal gas treatment system 2, absorption tower 3, absorption tower 4, carbon monoxide enriched gas 5, regenerator column 6, boiling device 7, gas-liquid separator 8, hotblast stove 9, gas switching valve 10, T-valve 11 and external carbonic acid gas 12.
Technical process is that the blast furnace gas that blast furnace 1 produces at first enters dedusting in the coal gas treatment system 2 Cooling, then after the pressurization of the blast furnace gas after the dedusting and the absorption tower 3 of two serial or parallel connections, 4 bottom Link to each other, coal gas flows from bottom to top, with 3,4 tops from the absorption tower enter tower can absorbing carbon dioxide Absorbent solution forms counter current contacting, and the carbon monoxide enriched gas 5 behind the carbon dioxide removal is as metallurgical important The energy is used for hot-blast stove preheated air, coke oven, station boiler and heater for rolling steel etc., has absorbed dioxy The solution of changing carbon enters by the top of pressurization by regenerator 6, and the bottom of regenerator 6 is provided with built-in boiling Device 7 is separated the sucking-off carbon dioxide in regenerator, the regenerator gas outlet links to each other with gas-liquid separator 8, separates After carbon dioxide and external carbon dioxide 12 compressed machines, gas transfer valve 10, triple valve 11 laggard Enter hot-blast stove 9 and injected fuel system, be cycled to used in blast furnace ironmaking, realize that blast furnace gas is in the workshop Recycling.
Embodiment
1. to 2000m
3Blast furnace, Separation and Recovery carbonic acid gas utilization process in the blast furnace gas, ton iron reclaims coal gas 1300～3000m
3, adopt capturing device to reclaim of the carrier gas of isolating carbonic acid gas as blast furnace blowing fuel, gas flow is 200～1000m
3/ min, pressure 0.8～1.5MPa; Adopt carbonic acid gas instead of part air to go into hotblast stove, the cold wind gas flow is 3500～6000m
3/ min.
2. to 3200m
3Blast furnace, Separation and Recovery carbonic acid gas utilization process in the blast furnace gas, ton iron reclaims coal gas 1300～3000m
3, adopting and reclaim of the carrier gas of isolating carbonic acid gas as blast furnace blowing fuel, gas flow is 700～1500m
3/ min, pressure 0.2～1MPa; Adopt carbonic acid gas instead of part air to go into hotblast stove, the cold wind gas flow is 5000～9000m
3/ min.
Claims (4)
1. one kind capture to be reclaimed separating carbon dioxide and circulation is used for blast furnace iron-smelting method and device from blast furnace gas, it is characterized in that blast furnace gas after the dedusting enter from the bottom absorption tower with go into from top, absorption tower tower can absorbing carbon dioxide solution form counter current contact, the solution that has absorbed carbonic acid gas is entered by the regenerator column top that is provided with built-in boiling device by pressurization, the air outlet, top of regenerator column links to each other with gas-liquid separator, the carbonic acid gas that carbonic acid gas after the Separation and Recovery can obtain with addition of the waste gas recycling back of various industrial furnaces is used for the hotblast stove of blast furnace air supply system and the carrier gas of blast furnace blowing fuel system, realize the recycle of carbonic acid gas in blast furnace plant, reduced emission of carbon-dioxide.
2. in accordance with the method for claim 1 and device, the absorption tower is double tower and puts, and switches by pipeline, can single tower operation, double-column in series or parallel running, can realize that overhaul of the equipments is convenient, and run without interruption.
3. in accordance with the method for claim 1 and device, the built-in boiling device of regenerator column makes simplified equipment to vaporizer, and is reliable, effectively reduces the regeneration steam consumption.
In accordance with the method for claim 1 and the device, the carbonic acid gas that carbonic acid gas after the separation can obtain with addition of the waste gas recycling back of various industrial furnaces is used for the hotblast stove of blast furnace air supply system and the carrier gas of blast furnace blowing fuel system, for 2000～5000m
3Blast furnace, fuel injection carrier gas flux are 100～3000m
3/ min, operating pressure 0.1～3MPa; The air quantity that enters hotblast stove is 2000～12000m
3/ min.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100868634A CN101575653A (en) | 2009-06-17 | 2009-06-17 | Method and device for separating carbon dioxide to improve mass energy of blast furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100868634A CN101575653A (en) | 2009-06-17 | 2009-06-17 | Method and device for separating carbon dioxide to improve mass energy of blast furnace gas |
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| CN101575653A true CN101575653A (en) | 2009-11-11 |
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| CNA2009100868634A Pending CN101575653A (en) | 2009-06-17 | 2009-06-17 | Method and device for separating carbon dioxide to improve mass energy of blast furnace gas |
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Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871026A (en) * | 2010-06-12 | 2010-10-27 | 郑州豫兴耐火材料有限公司 | Method for injecting carbon dioxide into blast furnace |
| CN102220443A (en) * | 2011-06-09 | 2011-10-19 | 马鞍山钢铁股份有限公司 | Device and method for top gas enrichment utilization of blast furnace |
| WO2012013485A1 (en) | 2010-07-29 | 2012-02-02 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Process for reuse of co2-containing offgases |
| CN102888476A (en) * | 2012-10-15 | 2013-01-23 | 中冶南方工程技术有限公司 | Blast furnace coal injection method by using blast furnace gas as coal injection delivery carrier |
| CN103776272A (en) * | 2014-03-05 | 2014-05-07 | 北京大学 | Converter gas mass-energy conversion and CO2 cycle steelmaking method |
| CN104087694A (en) * | 2014-07-22 | 2014-10-08 | 攀钢集团工程技术有限公司 | Blast furnace smoke recycling device |
| CN105923635A (en) * | 2016-04-26 | 2016-09-07 | 石家庄新华能源环保科技股份有限公司 | Supercritical state production method and system thereof |
| CN108220519A (en) * | 2016-12-22 | 2018-06-29 | 株式会社Posco | Molten iron manufacturing device and process for producing molten iron |
| CN108430914A (en) * | 2015-12-23 | 2018-08-21 | 株式会社Posco | Make the method for carbon dioxide decomposition and recycling using hot-blast stove |
| CN113028844A (en) * | 2021-04-02 | 2021-06-25 | 攀枝花攀钢集团设计研究院有限公司 | Blast furnace hot blast stove flue gas waste heat recovery device and recovery method |
| CN113549717A (en) * | 2021-08-18 | 2021-10-26 | 新疆八一钢铁股份有限公司 | Blast furnace gas injection system for Europe and metallurgy |
| WO2021238023A1 (en) * | 2020-05-28 | 2021-12-02 | 中国华能集团清洁能源技术研究院有限公司 | Carbon dioxide capture and utilization system integrated with steel mill, and use method thereof |
| CN114618259A (en) * | 2022-03-23 | 2022-06-14 | 北京大学 | Method for capturing carbon dioxide in flue gas |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101871026A (en) * | 2010-06-12 | 2010-10-27 | 郑州豫兴耐火材料有限公司 | Method for injecting carbon dioxide into blast furnace |
| WO2012013485A1 (en) | 2010-07-29 | 2012-02-02 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Process for reuse of co2-containing offgases |
| DE102010032748A1 (en) | 2010-07-29 | 2012-02-02 | Deutsches Zentrum für Luft- und Raumfahrt e.V. | Process for the reuse of CO2-containing waste gases |
| CN102220443A (en) * | 2011-06-09 | 2011-10-19 | 马鞍山钢铁股份有限公司 | Device and method for top gas enrichment utilization of blast furnace |
| CN102888476A (en) * | 2012-10-15 | 2013-01-23 | 中冶南方工程技术有限公司 | Blast furnace coal injection method by using blast furnace gas as coal injection delivery carrier |
| CN103776272A (en) * | 2014-03-05 | 2014-05-07 | 北京大学 | Converter gas mass-energy conversion and CO2 cycle steelmaking method |
| CN104087694A (en) * | 2014-07-22 | 2014-10-08 | 攀钢集团工程技术有限公司 | Blast furnace smoke recycling device |
| CN108430914A (en) * | 2015-12-23 | 2018-08-21 | 株式会社Posco | Make the method for carbon dioxide decomposition and recycling using hot-blast stove |
| CN105923635B (en) * | 2016-04-26 | 2019-03-08 | 石家庄新华能源环保科技股份有限公司 | A kind of production method and system of above-critical state |
| CN105923635A (en) * | 2016-04-26 | 2016-09-07 | 石家庄新华能源环保科技股份有限公司 | Supercritical state production method and system thereof |
| CN108220519A (en) * | 2016-12-22 | 2018-06-29 | 株式会社Posco | Molten iron manufacturing device and process for producing molten iron |
| WO2021238023A1 (en) * | 2020-05-28 | 2021-12-02 | 中国华能集团清洁能源技术研究院有限公司 | Carbon dioxide capture and utilization system integrated with steel mill, and use method thereof |
| CN113028844A (en) * | 2021-04-02 | 2021-06-25 | 攀枝花攀钢集团设计研究院有限公司 | Blast furnace hot blast stove flue gas waste heat recovery device and recovery method |
| CN113549717A (en) * | 2021-08-18 | 2021-10-26 | 新疆八一钢铁股份有限公司 | Blast furnace gas injection system for Europe and metallurgy |
| CN114618259A (en) * | 2022-03-23 | 2022-06-14 | 北京大学 | Method for capturing carbon dioxide in flue gas |
| CN114618259B (en) * | 2022-03-23 | 2022-12-30 | 北京大学 | Method for capturing carbon dioxide in flue gas |
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Application publication date: 20091111 |