CN203112858U - Bleeding oxygen reutilization device in metallurgical production - Google Patents
Bleeding oxygen reutilization device in metallurgical production Download PDFInfo
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- CN203112858U CN203112858U CN2013201377491U CN201320137749U CN203112858U CN 203112858 U CN203112858 U CN 203112858U CN 2013201377491 U CN2013201377491 U CN 2013201377491U CN 201320137749 U CN201320137749 U CN 201320137749U CN 203112858 U CN203112858 U CN 203112858U
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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
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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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
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Abstract
The utility model relates to a bleeding oxygen reutilization device in the metallurgical production. The device comprises air separation equipment, a boiler of a power plant and an air pipeline, wherein the air pipeline is used for delivering air into the boiler, the air separation equipment is connected with a steel-making converter through a pipeline, the pipeline is provided with an adjusting valve and a boosting machine, the air pipeline is connected with an air preheater through a secondary air fan, the air preheater is connected with the boiler through a secondary air pipeline, the pipeline in front of the adjusting valve is provided with a bleeding oxygen pipeline, the bleeding oxygen pipeline is connected with the air pipeline, and the bleeding oxygen pipeline is provided with a gate valve and a pressure reducing device. According to the bleeding oxygen reutilization device, the excessive bleeding oxygen in the steel and iron production is used for the combustion of the boiler of the self-generation power plant, so the bleeding oxygen can be effectively utilized, the coal dust can be sufficiently combusted, and the heat efficiency of the boiler and the combustion stability of a mixed-combustion boiler are improved.
Description
Technical field
The utility model relates to the device that gas is diffused in the smelter utilization, and particularly a kind of Steel Plant are to diffusing the use device of oxygen.
Background technology
In steel manufacture process, oxygen is absolutely necessary.Steel Plant guarantee supply generally all to be provided with large-scale air separation plant and to produce oxygen.But the living oxygen-producing amount of air separation plant is continuous on the one hand, and oxygen-consumption is fluctuation in the steelmaking process.When many steel-making converters smelting rhythm were fast, oxygen-consumption reached 130% of standard state sometimes, when bessemerizing or stop refining, oxygen-consumption only is 75% of standard state, and air separation plant would rather be selected to open for guaranteeing steel making oxygen amount abundance more by enterprise, and exhaustless oxygen is diffused; On the other hand, sometimes make steel demand to nitrogen greater than oxygen demand, also can use air separation machine as Nitrogen plant, cause by the isolated oxygen of air separation plant and diffuse in a large number, so not only increase the production cost of oxygen, also caused the huge waste of the energy.In recent years, enterprise is by improving the oxygen supply pattern, set up effective measure such as gas spherical tank and reduce diffusing of oxygen, but the rate of diffusing of oxygen is still between 3%-4%.
Existing Steel Plant utilize the blast furnace gas that produces in the production process to use the multi-fuel fired boiler generating usually, multi-fuel fired boiler can adopt clean burn coal dust or coal dust and two kinds of combustion conditions of blast furnace gas multifuel combustion, but because low, the poor quality of blast furnace gas calorific value, problems such as combustion instability, coal dust firing be not thorough can appear in the multifuel combustion process, cause the boiler efficiency to descend, stability reduces.
The utility model content
The utility model technical issues that need to address provide diffuses the oxygen re-use device in the metallurgical production, the oxygen that diffuses unnecessary in the Iron and Steel Production is used for the self-owned power plant boiler burning, can effectively utilize and diffuse oxygen, coal dust is fully burnt, improved the combustion stability of thermo-efficiency and the multi-fuel fired boiler of boiler.
Technical problem of the present utility model realizes with following technical proposals:
Diffuse the oxygen re-use device in a kind of metallurgical production, comprise air separation plant, power plant boiler and to the air line of boiler bubbling air, described air separation plant by pipe connection to steel-making converter, variable valve and supercharger are set on the pipeline, described air line is connected to air preheater via the secondary air blower fan, air preheater is connected to boiler by the secondary air pipeline, arrange on the pipeline before the wherein said variable valve and diffuse the oxygen pipeline, diffuse the oxygen pipeline and be connected with air line, diffuse gate valve and dropping equipment are set on the oxygen pipeline.
Diffuse the oxygen re-use device in the above-mentioned metallurgical production, described dropping equipment comprises reducing valve, gas-holder and the vacuum breaker that connects successively.
Diffuse the oxygen re-use device in the above-mentioned metallurgical production, described junction of diffusing oxygen pipeline and air line is positioned at after the secondary air blower fan, before the air preheater.
The utility model has adopted technique scheme, makes to diffuse oxygen by diffusing the secondary air air line that the oxygen pipeline inserts power plant for self-supply of Steel Plant, forms the burner hearth that oxygen-rich air is sent into boiler, makes in the environment of coal dust and blast furnace gas little oxygen enrichment in stove to burn.Change the situation that oxygen directly enters atmosphere of diffusing that original Steel Plant will have more than needed, realize taking full advantage of the energy on the one hand, effectively solve the multi-fuel fired boiler problems such as the coal dust firing instability, the burning that occur be insufficient that are in operation on the other hand, can improve boiler thermal output 0.5% to 1%.And owing to diffuse amount of oxygen and be far smaller than the boiler combustion required air quantity, therefore needn't consider the boiler safety problem that causes owing to oxygen concn in the oxygen-rich air is too high.
When using oxygenized air combustion supporting; burning required air quantity, generation exhaust gas volumn all reduce to some extent; can reduce give, the power consumption of induced draft fan; be that example can reduce power consumption and reaches 3%-10% with the 300MW multi-fuel fired boiler; effectively reduce the growing amount of coal firing boiler heating power type nitride when reducing production costs, the protection environment.
The oxygen that will diffuse of the present utility model draws the air line that is connected to boiler by diffusing the oxygen pipeline, diffuses oxygen pipeline ingress gate valve is installed, closing gate valve when not diffusing the oxygen generation; Diffuse the dropping equipment of being made up of reducing valve, gas-holder, vacuum breaker three parts also is installed on the oxygen pipeline, can carry out step-down to diffusing oxygen, guarantee to use safety.Send into air line and air mixed through the oxygen that diffuses that dropping equipment is discharged.Reducing valve in the dropping equipment makes and diffuses the oxygen pressure reduction, and gas-holder is kept and diffused the stable of oxygen pressure, and vacuum breaker can prevent in the diffusing oxygen pipeline of the air refluence playback in the air line.
Diffuse the oxygen pipeline after the junction of air line is positioned at the secondary air blower fan, before the air preheater.Diffuse oxygen like this and can not flow in the atmosphere, mixed oxygen-rich air can also be heated, improve the air themperature that enters boiler.
The device that oxygen is diffused in recovery of the present utility model can undergo technological transformation on the basis of original production line, and is simple.
Description of drawings
Fig. 1 is structural representation of the present utility model.
Each list of reference numerals is among the figure: 1, air separation plant, 2, gate valve, 3, reducing valve, 4, gas-holder, 5, vacuum breaker, 6, the secondary air blower fan, 7, air line, 8, air preheater, 9, the secondary air pipeline, 10, boiler, 11, variable valve, 12, supercharger, 13, steel-making converter, 14, diffuse the oxygen pipeline.
Embodiment
Below in conjunction with drawings and Examples the utility model is described in further detail.
As shown in Figure 1, the oxygen re-use device that diffuses in the metallurgical production comprises air separation plant 1, and the oxygen that air separation plant 1 is made to steel-making converter 13, sets gradually variable valve 11 and supercharger 12, in order to input and the pressure of controlling oxygen by pipe-line transportation on the pipeline.Diffuse the power plant boiler 10 that the oxygen utilization device comprises that also Steel Plant provide for oneself, air line 7 is to boiler 10 bubbling airs.Air line 7 is connected to air preheater 8 via secondary air blower fan 6, and air is heated, and the air after the heating enters boiler 10 by secondary air pipeline 9.Wherein diffuse oxygen pipeline 14 the pipeline setting of air separation plant 1 delivering oxygen, entrance is positioned at before the variable valve 11.Diffuse oxygen pipeline 14 and be connected with air line 7, the junction is positioned at after the secondary air blower fan 6 of air line 7, before the air preheater 8.Diffuse oxygen pipeline 14 on gate valve 2 and dropping equipment are set.Wherein dropping equipment comprises reducing valve 3, gas-holder 4 and the vacuum breaker 5 that connects successively.
It is by the oxygen of the about 500kPa of air separation plant 1 outlet pressure that the oxygen of Steel Plant's routine uses flow process, is pressurized to more than the 6MPa via supercharger 12, sends into steel-making converter 13 and finishes steel-making.When air separation plant 1 deoxygenation amount and steel-making converter 13 oxygen requirement balances, closing gate valve 2 makes oxygen all send steel-making converter 13; When steel-making converter 13 load reduces, air separation plant 1 deoxygenation amount is during greater than steel-making converter 13 oxygen requirements, with the unnecessary air line that oxygen inserts self-owned power plant boiler that diffuses.The flow process that oxygen is diffused in utilization is, open gate valve 2, change the aperture of variable valve 11, diffusing oxygen is introduced in the dropping equipment of being made up of reducing valve 3, gas-holder 4 and vacuum breaker 5, discharge through after the step-down of dropping equipment, diffuse the pressure of oxygen and be down to about 11kPa this moment, close with the top hole pressure of secondary air blower fan 6.Diffusing in the oxygen introducing air pipeline 7 after the step-down, and after oxygen intake placed secondary air blower fan 6.Mixed oxygen-rich air is admitted to and heats to 340 ℃ in the air preheater 8, and high-temperature oxygen-enriched air is admitted to boiler 10 by secondary air pipeline 9 and participates in burning.
Embodiment 1
The 300MW of Steel Plant multi-fuel fired boiler, be that 20% operating mode is example with the heat mixed-fuel burning proportion of blast furnace gas and coal dust, when feeding is diffused the oxygen amount when reaching 5474m3/h, the theoretical combustion temperature of comparing conventional air condition raises 23 ℃, funnel temperature reduces by 3 ℃, boiler thermal output improves 0.5%, send, induced draft fan can reduce power consumption 3.33%, 2.98% respectively; Diffuse the oxygen amount when reaching 10670m3/h when feeding, compare conventional air condition theoretical combustion temperature and can raise 46 ℃, funnel temperature reduces by 5 ℃, and boiler thermal output improves 1.2%, send, induced draft fan can reduce power consumption 5.79%, 5.10% respectively; Diffuse the oxygen amount when reaching 20293m3/h when feeding, thermo-efficiency improves 1.7%, send, induced draft fan can reduce power consumption 10.44%, 9.11% respectively.
Embodiment 2
When the 300MW multi-fuel fired boiler burns pure coal dust, diffuse the oxygen amount when feeding and reach 5561m3/h, compare conventional air condition theoretical combustion temperature and can raise 32 ℃, funnel temperature reduces by 2 ℃, thermo-efficiency improves 0.27%, send, induced draft fan can reduce power consumption 2.60%, 2.51% respectively; Diffuse the oxygen amount when reaching 10833m3/h when feeding, compare conventional air condition theoretical combustion temperature and can raise 64 ℃, funnel temperature reduces by 6 ℃, and thermo-efficiency improves 0.58%, send, induced draft fan can reduce power consumption 5.14%, 4.96% respectively; Diffuse the oxygen amount when reaching 20605m3/h when feeding, thermo-efficiency improves 1.11%, send, induced draft fan can reduce power consumption 9.78%, 9.45% respectively.
Claims (3)
1. diffuse the oxygen re-use device in the metallurgical production, it comprises air separation plant (1), power plant boiler (10) and to the air line (7) of boiler (10) bubbling air, described air separation plant (1) by pipe connection to steel-making converter (13), variable valve (11) and supercharger (12) are set on the pipeline, described air line (7) is connected to air preheater (8) via secondary air blower fan (6), air preheater (8) is connected to boiler (10) by secondary air pipeline (9), it is characterized in that, arrange on described variable valve (11) pipeline before and diffuse oxygen pipeline (14), diffuse oxygen pipeline (14) and be connected with air line (7), diffuse gate valve (2) and dropping equipment are set on the oxygen pipeline (14).
2. diffuse the oxygen re-use device in the metallurgical production according to claim 1, it is characterized in that described dropping equipment comprises reducing valve (3), gas-holder (4) and the vacuum breaker (5) that connects successively.
3. diffuse the oxygen re-use device in the metallurgical production according to claim 2, it is characterized in that, described junction of diffusing oxygen pipeline (14) and air line (7) is positioned at secondary air blower fan (6) afterwards, and air preheater (8) before.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201377491U CN203112858U (en) | 2013-03-25 | 2013-03-25 | Bleeding oxygen reutilization device in metallurgical production |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013201377491U CN203112858U (en) | 2013-03-25 | 2013-03-25 | Bleeding oxygen reutilization device in metallurgical production |
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| Publication Number | Publication Date |
|---|---|
| CN203112858U true CN203112858U (en) | 2013-08-07 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2013201377491U Expired - Fee Related CN203112858U (en) | 2013-03-25 | 2013-03-25 | Bleeding oxygen reutilization device in metallurgical production |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953918A (en) * | 2014-04-28 | 2014-07-30 | 首钢京唐钢铁联合有限责任公司 | Oxygen-enriched combustion system and technique for boiler of coal gas and pulverized coal co-combustion power station |
| CN104061575A (en) * | 2014-06-27 | 2014-09-24 | 启东市海信机械有限公司 | Coal gas dispersing ignition burner |
| CN106402928A (en) * | 2016-06-15 | 2017-02-15 | 江苏永钢集团有限公司 | Oxygen-enriched combustion system for coal gas electricity generation boiler |
| CN111961781A (en) * | 2020-09-09 | 2020-11-20 | 鞍钢股份有限公司 | Recycling method and system for surplus metallurgical gas |
| CN114686270A (en) * | 2022-03-16 | 2022-07-01 | 沈阳铝镁设计研究院有限公司 | Method for increasing oxygen concentration of gasifying agent of normal-pressure circulating fluidized bed gasification furnace |
-
2013
- 2013-03-25 CN CN2013201377491U patent/CN203112858U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103953918A (en) * | 2014-04-28 | 2014-07-30 | 首钢京唐钢铁联合有限责任公司 | Oxygen-enriched combustion system and technique for boiler of coal gas and pulverized coal co-combustion power station |
| CN103953918B (en) * | 2014-04-28 | 2017-01-18 | 首钢京唐钢铁联合有限责任公司 | Oxygen-enriched combustion system for boiler of coal gas and pulverized coal co-combustion power station |
| CN104061575A (en) * | 2014-06-27 | 2014-09-24 | 启东市海信机械有限公司 | Coal gas dispersing ignition burner |
| CN106402928A (en) * | 2016-06-15 | 2017-02-15 | 江苏永钢集团有限公司 | Oxygen-enriched combustion system for coal gas electricity generation boiler |
| CN106402928B (en) * | 2016-06-15 | 2018-11-30 | 江苏永钢集团有限公司 | Coal gas electricity generation boiler oxygen-enriched combustion system |
| CN111961781A (en) * | 2020-09-09 | 2020-11-20 | 鞍钢股份有限公司 | Recycling method and system for surplus metallurgical gas |
| CN114686270A (en) * | 2022-03-16 | 2022-07-01 | 沈阳铝镁设计研究院有限公司 | Method for increasing oxygen concentration of gasifying agent of normal-pressure circulating fluidized bed gasification furnace |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130807 Termination date: 20170325 |