CN201181160Y - Electric furnace residual heat utilization device - Google Patents
Electric furnace residual heat utilization device Download PDFInfo
- Publication number
- CN201181160Y CN201181160Y CNU2008200312978U CN200820031297U CN201181160Y CN 201181160 Y CN201181160 Y CN 201181160Y CN U2008200312978 U CNU2008200312978 U CN U2008200312978U CN 200820031297 U CN200820031297 U CN 200820031297U CN 201181160 Y CN201181160 Y CN 201181160Y
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- China
- Prior art keywords
- electric furnace
- waste heat
- temperature
- heat boiler
- top gas
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- Expired - Fee Related
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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
- Y02P10/25—Process efficiency
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- Vertical, Hearth, Or Arc Furnaces (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The utility model discloses a device for utilizing waste heat of an electric furnace, which comprises a waste heat boiler arranged on a high-temperature smoke discharge flue of the electric furnace, and a top gas burning chamber controlled by an adjusting valve and arranged in a radiative heating surface of the waste heat boiler. In the smelting period, the burner of the top gas burning chamber is in a normal-burning state. When no high-temperature smoke is discharged, the top gas burning chamber is in a burning state; and the top gas burning chamber keeps the minimal burning state when high-temperature smoke is discharged. The device has the advantages that device can thoroughly substitute for a water-cooling flue device with large investment, high operation cost and no economic benefits of a steel-making electric furnace, and can substitute for a heat pipe waste heat boiler device for producing continuous low-pressure saturated vapor. The device for utilizing waste heat of the electric furnace can completely produce continuous and stable medium-temperature and medium-pressure vapor for production and power generation.
Description
Technical field
The utility model relates to a kind of electric furnace residual heat using device, and this device is applied in the iron and steel enterprise in the steel-smelting electric furnace flue, realizes the purpose of UTILIZATION OF VESIDUAL HEAT IN.
Background technology
Electric furnace is the bigger equipment that consumes energy, and discharges a large amount of high-temperature flue gas (1000-1400 ℃) in its use, and because of the discharging of these high-temperature flue gas has discontinuity and the very high characteristics of dustiness, so its contained secondary energy sources can't effectively utilize always.In order to satisfy emission request, water-cooled flue must be set, and cooling tower and dust arrester, make high-temperature flue gas outwards discharging after cooling purifies.For this reason, except that the many equipment investments of needs, also need to consume a large amount of cooling waters and electric energy, operating cost is very high, but does not have any economic benefit.At present, the electric furnace more than 99% all adopts this mode to discharge flue gas.The high-temperature flue gas discharging was arranged in about 45 minutes in smelting cycle of electric furnace, and do not have the high-temperature flue gas discharging in about 15 minutes, this just makes and can not adopt conventional waste heat boiler to reclaim this part fume afterheat, because conventional boiler can not intermittently use.China Aug. 1st steel mill, Laiwu steel mill use heat pipe waste heat boiler to reclaim the electric furnace flue gas waste heat at present, steam with waste heat production changes in flow rate (not having sometimes immediately), and this steam is that (with 100 tons electric furnaces is example to the lower saturated vapor of pressure, and the steam pressure of production is 0.8MP
a, temperature is 180 ℃, output is 10 tons/hour), can only use for life.
Summary of the invention
Goal of the invention: the purpose of this utility model is at the deficiencies in the prior art, provides a kind of fume afterheat that utilizes electric furnace to produce the electric furnace residual heat using device of the medium temperature and medium pressure steam of continous-stable.
Technical scheme: electric furnace residual heat using device described in the utility model, comprise the waste heat boiler that is arranged on the electric furnace high-temperature flue gas discharging flue, it is characterized in that in this waste heat boiler radiant type heating surface, being provided with blast furnace gas combustion chamber by control valve control.
In smelting cycle, the burner of described blast furnace gas combustion chamber is in normal combustion state, and promptly no matter between the high-temperature flue gas draining period, still during not having fume emission, the blast furnace gas combustion chamber all is in normal combustion state, to guarantee the safety of boiler.
The fired state of blast furnace gas combustion chamber is controlled by the temperature at high-temperature flue gas entry place mainly.When not having the high-temperature flue gas discharging, the temperature of porch lower (as being lower than 900 ℃), this moment, flow control valve started, and the opening of blast furnace gas is strengthened, and the blast furnace gas combustion chamber is in fired state; When the temperature of porch is higher high-temperature flue gas when discharging arranged promptly, control valve makes the openings get smaller of blast furnace gas, and the blast furnace gas combustion chamber keeps minimum fired state.
Consider that the interior temperature of flue is subjected to the influence that increases gas and other factors of electric furnace often, the fired state of blast furnace gas combustion chamber also is subjected to the control of boiler steam quantum of output, promptly according to the aperture of the variation correction control valve of vapor volume, to guarantee the stable of steam quantum of output.
Beneficial effect: the utility model has the advantages that: 1, thoroughly having replaced steel-smelting electric furnace, that investment will be set is big, the operating cost height, and have no the water-cooled flue device of economic benefit.2, replaced the heat pipe waste heat boiler device of producing interrupted low pressure saturated vapor.3, this electric furnace residual heat using device can produce fully continous-stable the medium temperature and medium pressure steam (3.9Mpa, 260 ℃, 20t/h), for producing or for generating or heating use.
Description of drawings
Accompanying drawing is a process structure schematic diagram of the present utility model.
The specific embodiment
The function of regular waste heat boiler of electric furnace residual heat using device collection described in the utility model and regular blast furnace gas boiler is an one, therefore can be referred to as the combined type waste heat boiler.As shown in the figure, the high-temperature flue gas that electric furnace 1 is discharged imports combined type waste heat boiler 3 through flue after importing expansion chamber 2 udst separations by flue again.High-temperature flue gas is passed to pure water in the pipe to the part heat in waste heat boiler radiant type heating surface, make the part pure water become steam, flue-gas temperature is reduced to below 800 ℃, the contained dust of flue gas this moment does not have caking property, flue gas enters waste heat boiler convection type heating surface again and carries out heat exchange, has more pure water to become steam here.Temperature is reduced to and is entered deduster 4 after 180 ℃ flue gas leaves the combined type waste heat boiler, introduces halogen 6 through the flue gas of udst separation once more by smoking of air-introduced machine 5, discharges atmosphere at last.
Bottom in waste heat boiler radiant type heating surface is gas burner 7, this gas burner is connected with blast furnace gas pipeline 8, on blast furnace gas pipeline 8, be provided with control valve 9, this control valve 9 is subjected to the control of the temperature and the boiler steam quantum of output at smoke inlet place, promptly can in flue, be provided with temperature sensor, in the vapor outlet port pipeline, be provided with flow sensor, by the automatic work of conventional control technology by-pass valve control.
The quantity combusted that the burner of combined type waste heat boiler (combustion chamber) must be regulated blast furnace gas according to the high-temperature flue gas cyclically-varying that electric furnace is discharged, the electric furnace flue gas waste heat that the combined type waste heat boiler is obtained adds that the summation of blast furnace gas heat is basicly stable.Thereby the steam that waste heat boiler is produced is also stablized continuously.Because it is very high that electric furnace is discharged the flue-gas temperature that flue gas and blast furnace gas burning produce, so in 100 tons electric furnace, this combined type waste heat boiler fully can output 3.9Mpa, 260 ℃, the superheated vapor of 20T/h.
Claims (4)
1, a kind of electric furnace residual heat using device comprises the waste heat boiler that is arranged on the electric furnace high-temperature flue gas discharging flue, it is characterized in that being provided with in this waste heat boiler radiant type heating surface the blast furnace gas combustion chamber by control valve control.
2, electric furnace residual heat using device according to claim 1 is characterized in that the burner of blast furnace gas combustion chamber is in normal combustion state.
3, electric furnace residual heat using device according to claim 2, it is characterized in that the blast furnace gas combustion chamber burner controlled by the temperature in the flue by control valve.
4, electric furnace residual heat using device according to claim 3, it is characterized in that the blast furnace gas combustion chamber burner be subjected to the flow-control of boiler steam by control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200312978U CN201181160Y (en) | 2008-01-22 | 2008-01-22 | Electric furnace residual heat utilization device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2008200312978U CN201181160Y (en) | 2008-01-22 | 2008-01-22 | Electric furnace residual heat utilization device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201181160Y true CN201181160Y (en) | 2009-01-14 |
Family
ID=40250659
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2008200312978U Expired - Fee Related CN201181160Y (en) | 2008-01-22 | 2008-01-22 | Electric furnace residual heat utilization device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201181160Y (en) |
-
2008
- 2008-01-22 CN CNU2008200312978U patent/CN201181160Y/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: JIANGSU ZHONGXIAN GROUP CO.,LTD. Free format text: FORMER OWNER: YUAN ZHANGSHENG Effective date: 20090814 |
|
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20090814 Address after: Jiangsu province Yangzhou City Jiangyang Industrial Park Road 1, Jiangsu lotus in Machinery Co. Ltd, zip code: 225009 Patentee after: Jiangsu Zhongxian Group Co., Ltd. Address before: Jiangsu province Yangzhou City Jiangyang Industrial Park Road 1, Jiangsu lotus in Machinery Co. Ltd, zip code: 225009 Patentee before: Yuan Changsheng |
|
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20090114 Termination date: 20130122 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |