CN102660332A - Method for CO2 separation and CO enrichment in converter gas - Google Patents
Method for CO2 separation and CO enrichment in converter gas Download PDFInfo
- Publication number
- CN102660332A CN102660332A CN2012100736529A CN201210073652A CN102660332A CN 102660332 A CN102660332 A CN 102660332A CN 2012100736529 A CN2012100736529 A CN 2012100736529A CN 201210073652 A CN201210073652 A CN 201210073652A CN 102660332 A CN102660332 A CN 102660332A
- Authority
- CN
- China
- Prior art keywords
- converter
- gas
- coal gas
- converter gas
- enrichment
- 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
Links
Classifications
-
- 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
-
- 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
- Y02P10/25—Process efficiency
-
- 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
-
- 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
Abstract
The invention relates to a method for CO2 separation and CO enrichment in converter gas, pertains to the field of comprehensive utilization of metallurgical resources, and provides an energy-saving technology for processing and recycling the converter gas. Dust removal is performed on the high-temperature converter gas by using high temperature ceramics to filter dust out of the high-temperature converter gas, high-temperature waste heat can be utilized, trapping of CO2 is performed by using a chemical absorption method, CO is enriched at the same time, utilization rate of the converter gas is improved, and energy consumption is reduced effectively. Dust removal is performed on the high-temperature converter gas by using high temperature ceramics to filter dust out of the high-temperature converter gas, high-temperature waste heat can be utilized, trapping of CO2 is performed by using a chemical absorption method, CO is enriched at the same time, utilization rate of the converter gas is improved, and energy consumption is reduced effectively. According to the invention, green integration of processes of flue gas dust removal, waste heat utilization, CO2 separation, CO enrichment, etc. is realized in a converter gas dedusting and cooling process. The method is used in converter steelmaking workshops, an energy-saving purpose is achieved, coupling optimization of waste heat utilization and converter gas utilization rate improvement is achieved, and the method has remarkable economic and social benefits.
Description
Technical field
The invention belongs to metallurgical comprehensive utilization of resources field, relate to CO in a kind of separation coal gas of converter
2And the power-saving technology of enrichment CO, CO in a kind of separation coal gas of converter is provided
2And the method for enrichment CO, can make the utilization of coal gas of converter energy reach optimizing.
Background technology
Along with the mass consumption of fossil energy, CO
2Quantity discharged cumulative year after year, Greenhouse effect be more aggravation also, brings huge harm to environment for human survival.Estimate following 10 years, China's economic will continue to keep growth momentum faster, also will improve the consumption of the energy and the total emission volumn of carbon, therefore, CO
2It is imperative to reduce discharging.
Coal gas of converter is the sub product of converter production process; In stove, continue to be blown at a high speed highly compressed oxygen during converter steelmaking in the metal pool; Fully stir the molten bath, make fully contact and the better reaction mutually of gas, liquid two, so that farthest remove carbon and other impurity element composition in the molten iron.Because the oxidation of carbon has produced high-temperature flue gas in the molten iron, what of carbon content in blowing oxygen quantity and the molten iron are the size of furnace gas amount depend primarily on.The converter gas that steel-making converter produces is main with carbon monoxide and carbonic acid gas, contains the carbon monoxide of higher concentration, and carries and can be worth also higherly, is the important secondhand energy of iron and steel enterprise, ton recyclable 60～130m of steel
3Coal gas, mean calorie are 8000～10000kJ/m
3The mean calorie of coal gas of converter is 8000～10000kJ/m
3, its staple is: CO
215～20%, CO 60～70%, N
210～20%.
At present, the RECOVERY OF CONVERTER GAS technology mainly is to be that flue gas hydrometallurgic recovery system (OG method) and two kinds of methods of dry method flue gas recovery technology (LT method) of master the most generally adopt with the twin-stage Venturi meter.Wet processing is commonplace in the world; Wet purification system typical process is: after coal gas goes out converter, through the blister cooler cooling, pass through two-stage Venturi meter, elbow separator etc. then; Gas temperature is reduced to about 35 ℃, with vacuum fan the gas that purifies is sent into gas storage holder then.Wet method dedusting system exists shortcomings such as energy consumption height, the environment protection treating difficulty is big, salvage value is low.
For a long time, coal gas of converter is not fully used, and the most of converter gas of steelworks is used as exhaust gas emission; Converter gas after partially recycled also can only be used as factory's fuel; Not only wasted the CO resource of a large amount of preciousnesses, also incited somebody to action other gaseous emissions such as carbonic acid gas wherein, environment has been produced threat.
Therefore, the CO in the separation coal gas of converter
2Enrichment CO is to its recycling; Help reducing energy consumption; Global structure optimization for converter steelmaking process is significant, and " two high " technology of separating coal gas of converter acquisition high-purity CO and carbonic acid gas has the potential economic and social benefit.Help realizing the sound development of the energy-saving and emission-reduction of converter steelmaking process, China's economy and environment sustainable development are had great strategic importance.
Waste heat loses in a large number in the high temperature coal gas of converter process of cooling in order to solve, the resource serious waste, cause problems such as energy consumption increase, and the present invention provides CO in a kind of separation coal gas of converter
2And the method for enrichment CO, mainly be conceived to flue gas ash removal, UTILIZATION OF VESIDUAL HEAT IN and separation of C O in the coal gas of converter dedusting process of cooling
2The green integrated system of technologies such as enrichment CO is used for the converter steelmaking workshop, reaches energy-conservation purpose, and UTILIZATION OF VESIDUAL HEAT IN reaches the coupling optimizing with raising coal gas of converter utilization ratio, has remarkable economical and social benefit.
Summary of the invention
The invention provides a kind of afterheat of converter gas utilization and separate CO in the coal gas of converter simultaneously
2And the method for enrichment CO, the high temperature complementary energy of high temperature coal gas of converter is recycled, and carried out CO with chemical absorption method
2Capture simultaneously CO obtain enrichment, improved the utilization ratio of coal gas of converter, effectively reduce energy consumption, make UTILIZATION OF VESIDUAL HEAT IN and improve the coal gas of converter utilization ratio and reach the coupling optimizing.
Coal gas of converter of the present invention is by the pyroceramic dust removal by filtration; Its ultimate principle purifies for the high temperature coal gas of converter gets in the pyroceramic strainer; Dust granules obtains collecting in porcelain filter, discharges clean coal gas of high temperature, and high-temperature residual heat can obtain utilizing; Overcome the deficiency that traditional coal gas of converter treatment technology high-temperature residual heat is difficult to utilize, the elevated temperature heat carrier is direct drying material also.
The present invention is by pyroceramic dust removal by filtration system, CO
2The chemical absorption system, CO
2Recovery system, and the CO enrichment system forms, and makes the CO of coal gas of converter
2Obtain separating, enrichment CO, the high temperature sensible heat of high temperature coal gas of converter obtain recycling, and have reduced the power loss of coal gas of converter treating processes, realize separation of C O
2Enrichment CO and residual heat integrative utilize energy-conservation new way.
The CO that the present invention reclaims
2Can in the converter mill, use, utilize CO
2Replace N
2Carry out slag splashing, utilize CO
2Replace Ar to carry out the converter bottom blowing process, isolating CO
2Also can be used for other industry.The CO gas of enrichment from coal gas of converter is metallurgical important thermal source, can be used for hotblast stove preheated air, coke oven, station boiler and heater for rolling steel etc., has improved gas utilization rate.
The sensible heat of the present invention's recyclable high temperature coal gas of converter 70～90% after the pyroceramic dedusting can directly be used for coal gas of converter CO
2Absorption liquid and CO in the recovery system
2The separation of gas, or be used for the drying of metallurgical raw material, also available these energy can produce steam, drive turbo-generator generating etc.
For 30～300 tons of coal gas of converter separation of C O
2Enrichment CO technology adopts the pyroceramic dust removal by filtration to carry out the high temperature sensible heat utilization, isolating CO
2Be used for slag splashing and converter bottom blowing process, in converter, add coke powder or coal dust and additive before the slag splashing, its mixed carbon comtent is 10～1200kg, and CO again jets
2Spatter slag, spattering the slag time is 3～5min, and amount of spraying gas is 1000～100000Nm
3/ h, WP is 0.4～1.6MPa.Converter bottom blowing CO
2Technology, bottom blowing CO
2Time 6～10min, air supply intensity are 0.01～0.2Nm
3/ (tm in), the ton steel is with 0.01～0.05 ton of CO capable of using
2, produce 1,000,000 tons of steel 1～50,000 ton of CO capable of using
2
The invention has the advantages that: replace traditional coal gas of converter dedusting with the pyroceramic dust removal by filtration, the sensible heat of recyclable high temperature coal gas of converter 70～90% can directly be used for coal gas of converter CO
2Absorption liquid and CO in the recovery system
2The separation of gas, or be used for the drying of metallurgical raw material, also available these energy can produce steam, drive turbo-generator generating etc.; CO
2Replace inert nitrogen and argon gas as the origin of slag splashing and converter bottom blowing, reduced gas CO
2Discharging, allocate CO that carbon reaction back produces into and can be used as metallurgical important thermal source and fully be used, played positive effect for having alleviated atmospheric Greenhouse effect, have significant environmental benefit.
Description of drawings
Fig. 1 is coal gas of converter separation of C O of the present invention
2And enrichment CO process flow sheet.
This patent comprises converter 1, pyroceramic dust removal by filtration system 2, residual neat recovering system 3, CO
2Absorption system 4, CO
2Separation system 5, CO enrichment system 6, CO
2Slag splashing and CO
2Bottom blowing system 7.
The main technique flow process is that the coal gas of high temperature of discharging from converter 1 is transported to residual neat recovering system after via pyroceramic dust removal by filtration system 2 and carries out the high temperature sensible heat utilization, then coal gas of converter is delivered to CO
2In the absorption system, absorption liquid and coal gas of converter carry out convection current, CO
2Be absorbed, CO obtains enrichment and gets into CO enrichment system 6, obtains to be rich in CO
2Absorption liquid, again through CO
2Separation system 5 backs get into CO
2Slag splashing and CO
2Bottom blowing system 7 makes the high temperature afterheat of converter gas be utilized effectively CO
2And be utilized effectively respectively after the CO separation, realize the energy-saving and emission-reduction of converter smelting.
Embodiment
1.100 ton coal gas of converter separation of C O
2Enrichment CO technology adopts the pyroceramic dust removal by filtration to carry out the high temperature sensible heat utilization, isolating CO
2Be used for slag splashing and converter bottom blowing process, top blast CO
2Slag splashing, spattering the slag time is 3min, amount of spraying gas is 35000Nm
3/ h, bottom blowing CO
2Time 8min, air supply intensity are 0.08Nm
3/ (tmin), every stove steel 3 tons of CO capable of using
2
2.300 ton coal gas of converter separation of C O
2Enrichment CO technology adopts the pyroceramic dust removal by filtration to carry out the high temperature sensible heat utilization, isolating CO
2Be used for slag splashing and converter bottom blowing process, top blast CO
2Slag splashing, spattering the slag time is 5min, amount of spraying gas is 50000Nm
3/ h, bottom blowing CO
2Time 10min, air supply intensity are 0.12Nm
3/ (tmin), every stove steel ton steel 8 tons of CO capable of using
2
Claims (3)
1. one kind is separated CO in the coal gas of converter
2And the method for enrichment CO, it is characterized in that the high temperature coal gas of converter through the dedusting of pyroceramic strainer, dust granules obtains collecting in porcelain filter, discharges clean coal gas of high temperature, and high-temperature residual heat can be utilized effectively, and can directly be used for coal gas of converter CO
2Absorption liquid and CO in the recovery system
2The separation of gas, or be used for the drying of metallurgical raw material, also can be used for producing steam, drive turbo-generator generating etc.; Coal gas of converter behind the high temperature sensible heat utilization is through CO
2Absorption system obtains to be rich in CO
2Absorption liquid, the CO in the coal gas of converter obtains enrichment then, by CO
2Separation system reclaims CO
2, the CO after the recovery
2Can be used for splashing slag in converter and converter bottom blowing process, realize separation of C O
2Enrichment CO and residual heat integrative utilize energy-conservation new way.
2. according to the described method of claim 1, isolating CO
2Be used for splashing slag in converter and converter bottom blowing process, for 80～300t converter, spattering the slag time is 3～5min, and amount of spraying gas is 1000～100000Nm
3/ h; Converter bottom blowing CO
2Technology, bottom blowing CO
2Time 6～10min, air supply intensity are 0.01～0.2Nm
3/ (tmin), produce 1,000,000 tons of steel 1～50,000 ton of CO capable of using
2
3. according to the described method of claim 1, coal gas of converter can make the high temperature sensible heat be utilized effectively by the pyroceramic dust removal by filtration, can directly be used for coal gas of converter CO
2Absorption liquid and CO in the recovery system
2The separation of gas, or be used for the drying of metallurgical raw material, also can be used for producing steam, drive turbo-generator generating etc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100736529A CN102660332A (en) | 2012-03-20 | 2012-03-20 | Method for CO2 separation and CO enrichment in converter gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012100736529A CN102660332A (en) | 2012-03-20 | 2012-03-20 | Method for CO2 separation and CO enrichment in converter gas |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102660332A true CN102660332A (en) | 2012-09-12 |
Family
ID=46769916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012100736529A Pending CN102660332A (en) | 2012-03-20 | 2012-03-20 | Method for CO2 separation and CO enrichment in converter gas |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102660332A (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776272A (en) * | 2014-03-05 | 2014-05-07 | 北京大学 | Converter gas mass-energy conversion and CO2 cycle steelmaking method |
| CN103881764A (en) * | 2014-03-31 | 2014-06-25 | 江苏联峰能源装备有限公司 | Method for separating and recycling CO2 in blast furnace gas and converter gas |
| CN104073297A (en) * | 2014-06-19 | 2014-10-01 | 广东正鹏生物质能源科技有限公司 | Integrated system for purifying biomass fuel gas and recycling combustion tail gas waste heat |
| CN104388627A (en) * | 2014-11-20 | 2015-03-04 | 中冶南方工程技术有限公司 | Dust removing method for coal gas of converter and system |
| CN108087071A (en) * | 2017-12-05 | 2018-05-29 | 南京依柯卡特排放技术股份有限公司 | To the determination methods of DPF carbon carrying capacity |
| CN109837358A (en) * | 2019-03-26 | 2019-06-04 | 东北大学 | A kind of steel-making flue gas self-loopa top-bottom blowing system and method |
-
2012
- 2012-03-20 CN CN2012100736529A patent/CN102660332A/en active Pending
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103776272A (en) * | 2014-03-05 | 2014-05-07 | 北京大学 | Converter gas mass-energy conversion and CO2 cycle steelmaking method |
| CN103881764A (en) * | 2014-03-31 | 2014-06-25 | 江苏联峰能源装备有限公司 | Method for separating and recycling CO2 in blast furnace gas and converter gas |
| CN103881764B (en) * | 2014-03-31 | 2015-11-11 | 江苏联峰能源装备有限公司 | A kind of to be separated and CO in recycle blast furnace and coal gas of converter 2method |
| CN104073297A (en) * | 2014-06-19 | 2014-10-01 | 广东正鹏生物质能源科技有限公司 | Integrated system for purifying biomass fuel gas and recycling combustion tail gas waste heat |
| CN104073297B (en) * | 2014-06-19 | 2016-04-20 | 广东正鹏生物质能源科技有限公司 | The integrated system of a kind of biomass gas purifying and combustion tail gas residual heat recovery |
| CN104388627A (en) * | 2014-11-20 | 2015-03-04 | 中冶南方工程技术有限公司 | Dust removing method for coal gas of converter and system |
| CN108087071A (en) * | 2017-12-05 | 2018-05-29 | 南京依柯卡特排放技术股份有限公司 | To the determination methods of DPF carbon carrying capacity |
| CN108087071B (en) * | 2017-12-05 | 2021-09-28 | 南京依柯卡特排放技术股份有限公司 | Method for judging carbon loading of DPF |
| CN109837358A (en) * | 2019-03-26 | 2019-06-04 | 东北大学 | A kind of steel-making flue gas self-loopa top-bottom blowing system and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102994678B (en) | Method and system for pulverized coal gasification for gas generation and direct reduction metallurgy of gas-based shaft furnace | |
| CN102660332A (en) | Method for CO2 separation and CO enrichment in converter gas | |
| US20170108275A1 (en) | Process and system for waste heat grading cyclic utilization and pollutant emission reduction of sintering flue gas | |
| CN102268504B (en) | Direct reduction process for producing sponge iron by using coke oven gas | |
| CN101638702B (en) | Recycling method of outlet gas in direct reduction process using gas as reducing gas | |
| CN102010924B (en) | Method for producing directly reduced iron from coal | |
| JP2004309067A (en) | Method of using blast furnace gas | |
| CN101575653A (en) | Method and device for separating carbon dioxide to improve mass energy of blast furnace gas | |
| CN101603104A (en) | CO in blast furnace and the coal gas of converter 2Separation and Recovery and cyclic utilization method | |
| CN104846209A (en) | System and method for recovering iron and waste heat from molten copper residues respectively through step-by-step reduction and coal gasification | |
| CN109837358B (en) | Steelmaking flue gas self-circulation composite converting system and method | |
| CN103776272A (en) | Converter gas mass-energy conversion and CO2 cycle steelmaking method | |
| CN103849705B (en) | RECOVERY OF CONVERTER GAS UTILIZATION OF VESIDUAL HEAT IN and minuteness particle purification system | |
| WO2010075670A1 (en) | Process for producing phosphoric acid in blast furnace and installation for roasting phosphorus sludge and recovering heat | |
| CN105861816A (en) | Solid inhibitor addition based method for collaborative emission reduction of SO2 and dioxins in sintering process | |
| CN105314894A (en) | Rotary kiln device and method for indirectly producing lime and recycling carbon dioxide | |
| CN102607287A (en) | Ferro-nickel smelting process waste heat generating system | |
| CN203034041U (en) | System of powdered coal gasification gas making and gas-based shaft furnace direct reduction metallurgy | |
| CN102719280A (en) | Calcium carbide furnace gas purifying method | |
| CN102101644A (en) | Method for preparing ammonia synthesis gas from iron alloy smoke | |
| CN101973521A (en) | Method for forming oxygen and hydrogen by using steam and carbon monoxide through regenerating reduction and circular gasification | |
| CN204401075U (en) | A kind of sintering process SO2, dioxin works in coordination with emission-reducing system | |
| CN204125382U (en) | A kind of partition shaft furnace with power generation assembly | |
| CN109437604B (en) | Method for realizing sensible heat recovery and tail gas utilization of burnt lime by utilizing methane reforming | |
| CN101654224A (en) | Method for regeneration of waste hydrochloric acid by oxygen enriched roasting |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20120912 |
|
| RJ01 | Rejection of invention patent application after publication |