CN103383193A - Integrated dust removing method for high-dust flue gas of electric furnace - Google Patents
Integrated dust removing method for high-dust flue gas of electric furnace Download PDFInfo
- Publication number
- CN103383193A CN103383193A CN2012101423080A CN201210142308A CN103383193A CN 103383193 A CN103383193 A CN 103383193A CN 2012101423080 A CN2012101423080 A CN 2012101423080A CN 201210142308 A CN201210142308 A CN 201210142308A CN 103383193 A CN103383193 A CN 103383193A
- Authority
- CN
- China
- Prior art keywords
- flue gas
- working medium
- heat
- enters
- gas
- 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
Images
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
- Y02P10/25—Process efficiency
Landscapes
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
An integrated dust removing method for high-dust flue gas of an electric furnace is characterized in that flue gas from the interior of the electric furnace is discharged through a fourth hole and enters a combustion settling chamber after being mixed with cold draft through a water-cooling sliding sleeve, and flue gas passing through the combustion settling chamber enters a uniform-velocity waste heat exchange chamber to emit heat, then enters a bag-type dust remover, and is pressed into an exhaust pipe through a main blower after being dedusted to be exhausted into the atmosphere. Meanwhile, an organic working medium is driven by a working medium pump and absorbs heat in a straight tube plate heat pipe exchanger to become steam, the steam enters a steam pocket, and the working medium steam expands and acts in a steam turbine to drive a generator to generate power. The working medium steam discharged out of the steam turbine is condensed into a saturated liquid through a condenser, then enters a liquid storage tank, is fed into the straight tube plate heat pipe exchanger after being pressurized by the working medium pump so as to start a new round of circulation. The integrated dust removing method is characterized in that R245ca is used as a circulatory organic working medium. The integrated dust removing method can reclaim heat energy in the flue gas to the utmost extent and converts the reclaimed heat energy into high-grade electric energy, has the advantages that the device investment is low, the energy consumption during operation is low and the environmental protection effect is good.
Description
Technical field
The present invention relates to the high ash-laden gas integration dust-removing of electric furnace method, specifically the heat energy in recovered flue gas is converted into the high-grade electric energy to greatest extent, can improve dust collection capacity again, belongs to the electric stove dust technical field.
Background technology
The purifier of electric furnace flue gas is that electric furnace flue gas generation, UTILIZATION OF VESIDUAL HEAT IN facility, deduster connect successively by pipeline in the prior art.
Usually the UTILIZATION OF VESIDUAL HEAT IN facility that adopts at present: water row tube waste heat boiler, heat accumulation type heat pipe waste heat boiler reclaim the waste heat of electric furnace flue gas, produce saturated vapor etc.Due to the big ups and downs of electric furnace flue gas temperature, dustiness is large, and light water tubulation waste heat boiler is difficult to apply to the waste heat recovery of electric furnace flue gas.At present, the heat accumulation type heat pipe waste heat boiler has successfully applied in the electric furnace flue gas waste heat recovery, but due to the inherent shortcoming of heat pipe (cost is high, not freeze proof, non-refractory, service life short), make the heat accumulation type heat pipe waste heat boiler also face a lot of problems at steel industry universal.
Simultaneously, because the electric furnace flue gas temperature fluctuation is violent, wave amplitude is large, and residual heat system just must design enough greatly, guarantees that high-temperature flue gas also can effective cooling.But actual steam output the situation of low load with strong power occurs far below the evaporation capacity of residual heat system.This has just reduced the economic worth of residual heat system relatively, has increased the investment of residual heat system.
Summary of the invention
For the problems referred to above, the invention provides the high ash-laden gas integration dust-removing of electric furnace method, can not only effectively reduce electric furnace flue gas temperature fluctuation amplitude by the method, also reduced simultaneously the peak value of flue-gas temperature, cooling high temperature flue gas efficiently, the heat energy in recovered flue gas is converted into the high-grade electric energy to greatest extent, can reduce simultaneously the exhaust temperature of flue gas, improve dust collection capacity, obtain good dust removing effects, the dust concentration 10mg/Nm of discharging
3, and do not affect the stable and continuous of electric furnace production.
The technical solution adopted in the present invention is as follows:
The high ash-laden gas integration dust-removing of electric furnace method, it is characterized in that: in electric furnace of the present invention, smoke discharging is discharged by the 4th hole, sneak into cold wind through the water-cooled sliding sleeve, enter combustion settling chamber after the burning CO gas, CO gas in flue gas is fully burnt, 800 ℃ of the flue-gas temperatures of adjusting control expansion chamber, flue gas through combustion settling chamber enters the uniform flow residual heat exchanging chamber, high-temperature flue gas is emitted heat, complete heat exchange, temperature is down to 100 ℃, and then flue gas enters sack cleaner, dust concentration 10mg/Nm after dedusting
3, be pressed into aiutage by main air blower and enter atmosphere.Simultaneously, the low boiling organic working medium drives by working medium circulating pump, absorbs the heat of flue gas in straight tube plate heat pipe heat exchanger, becomes saturated vapor, enters drum, but supersaturation moisture content and impurity in drum filtering source of the gas are guaranteed the steam turbine even running.Working substance steam expands in the low boiling working fluid steam turbine and does work by after pressure regulator valve, and drives the threephase generator generating.The electric energy that system sends is three-phase alternating current, and rated voltage is 380V, can incorporate electrical network in factory into through after pressure regulation, or directly gives consumer and use.The working substance steam of discharging from the low boiling working fluid steam turbine is saturated liquid by magnesium rib-pipe type condenser condenses, enter fluid reservoir, fluid reservoir can be guaranteed the working medium circulating pump continuous pressure, and working medium circulating pump is sent in straight tube plate heat pipe heat exchanger after worker quality liquid is pressurizeed, the circulation of a beginning new round.The recirculated water of coming from cooling tower drives by water circulating pump, enters in magnesium rib-pipe type condenser to absorb heat, tries hard to recommend in Natural Circulation to enter in cooling tower under moving, emits heat, becomes water at low temperature, the circulation of a beginning new round.
It is further characterized in that: it is the circulation organic working medium that the present invention adopts R245ca.
The invention has the beneficial effects as follows: due to device combinations such as device for generating power by waste heat place of water tubulation waste heat boiler, heat accumulation type heat pipe waste heat boilers, so plant area is economized, investment and operating cost are low; Heat energy in recovered flue gas is converted into the high-grade electric energy to greatest extent, drags dedusting fan, has reduced system's operation energy consumption; Because the exhaust temperature of flue gas can maintain 100 ℃, the filtrate in sack cleaner can be selected cheapest normal temperature cloth bag, has reduced investment and operating cost; Concentration of emission is low, can guarantee to discharge dust concentration 10mg/Nm
3, reach the purpose that energy-conserving and environment-protective are produced.
Compared with the prior art the present invention has the following advantages:
1, can alleviate the rapid drawdown that rises sharply of flue-gas temperature;
2, but supersaturation moisture content and impurity in drum filtering source of the gas, guarantee the steam turbine even running;
3, working medium fluid reservoir can be guaranteed the working medium circulating pump continuous pressure;
4, improve device for generating power by waste heat efficient;
5, reduce the device for generating power by waste heat investment;
6, can reduce and sneak into cold blast rate, save the dedusting energy consumption.
Description of drawings
Fig. 1 is the process chart of realizing the high ash-laden gas integration dust-removing of electric furnace of the present invention method.
In figure: 1. electric furnace, 2. water-cooled sliding sleeve, 3. combustion settling chamber, 4. uniform flow residual heat exchanging chamber, 5. deduster, 6. main air blower, 7. aiutage, 8. straight tube plate heat pipe heat exchanger, 9. working medium circulating pump, 10. drum, 11. fluid reservoirs, 12. low boiling working fluid steam turbines, 13. threephase generator, 14. water pump, 15. magnesium rib-pipe type condensers, 16. cooling towers.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1: the high ash-laden gas integration dust-removing of electric furnace of the present invention method step is as follows: the interior smoke discharging flow 35 * 10 of 150t/h steel-smelting electric furnace 1
4Nm
3/ h, 1150 ℃ of temperature, dust content 29g/Nm
3Discharged by the 4th hole, sneak into cold wind through water-cooled sliding sleeve 2, enter combustion settling chamber 3 after the burning CO gas; The effect of combustion settling chamber 3 is: reduce flue gas flow rate, make the big dust particle sedimentation of carrying in flue gas, and suitably sneak into cold wind, finally burn CO gas, 800 ℃ of the flue-gas temperatures of adjusting control expansion chamber, enter uniform flow residual heat exchanging chamber 4 by combustion settling chamber 3 flue gas out, high-temperature flue gas is emitted heat, completes heat exchange, and temperature is down to 100 ℃, enter deduster 5, dust concentration 10mg/Nm after dedusting
3Be pressed into aiutage 7 by main air blower 6 and enter atmosphere.Simultaneously, low boiling working fluid drives by working medium circulating pump 9, first absorb the heat of fume afterheat carrier in the straight tube plate heat pipe heat exchanger 8 in being installed on uniform flow residual heat exchanging chamber 4, become saturated vapor, enter drum 10, but supersaturation moisture content and impurity in drum 10 filtering sources of the gas are guaranteed steam turbine 12 even runnings.Working substance steam in the interior expansion acting of low boiling working fluid steam turbine 12, and drives threephase generator 13 generatings by after pressure regulator valve.The electric energy that system sends is three-phase alternating current, and rated voltage is 380V, can incorporate electrical network in factory into through after pressure regulation, or directly gives consumer and use.The working substance steam of discharging from low boiling working fluid steam turbine 12 is condensed into saturated liquid by magnesium rib-pipe type condenser 15, enter fluid reservoir 11, fluid reservoir 11 can be guaranteed working medium circulating pump 9 continuous pressures, working medium circulating pump 9 is sent in straight tube plate heat pipe heat exchanger 8 after worker quality liquid is pressurizeed, the circulation of a beginning new round.The recirculated water of coming from cooling tower 16 drives by water circulating pump 14, enters in magnesium rib-pipe type condenser 15 to absorb heat, tries hard to recommend in Natural Circulation to enter in cooling tower 16 under moving, emits heat, becomes water at low temperature, the circulation of a beginning new round.
Described low boiling working fluid is R245ca, the power pressure that enters the low boiling working fluid steam turbine is 2.89MPa, and when the power pressure after the acting of expanding was 0.27MPa, system's electromotive power output was 3500KW, Rankine cycle efficient is 26.5%, and the flue-gas temperature that system discharges is 100 ℃.
Take the waste heat recovery of 150t/h steel-smelting electric furnace and dust collecting process as example, the inventive method and conventional method relatively are described as follows:
Annotate: work per year and calculated in 330th.
This shows, the present invention's heat energy in recovered flue gas to greatest extent is converted into the high-grade electric energy, can also reach good dust removing effects, the dust concentration 10mg/Nm of discharging
3, plant investment is low, operation energy consumption is low, and environment protecting is good.
Claims (2)
1. the high ash-laden gas integration dust-removing of electric furnace method, it is characterized in that: in electric furnace of the present invention, smoke discharging is discharged by the 4th hole, sneak into cold wind through the water-cooled sliding sleeve, enter combustion settling chamber after the burning CO gas, CO gas in flue gas is fully burnt, 800 ℃ of the flue-gas temperatures of adjusting control expansion chamber, flue gas through combustion settling chamber enters the uniform flow residual heat exchanging chamber, high-temperature flue gas is emitted heat, complete heat exchange, temperature is down to 100 ℃, and then flue gas enters sack cleaner, dust concentration 10mg/Nm after dedusting
3, be pressed into aiutage by main air blower and enter atmosphere.Simultaneously, the low boiling organic working medium drives by working medium circulating pump, absorbs the heat of flue gas in straight tube plate heat pipe heat exchanger, becomes saturated vapor, enters drum, but supersaturation moisture content and impurity in drum filtering source of the gas are guaranteed the steam turbine even running.Working substance steam expands in the low boiling working fluid steam turbine and does work by after pressure regulator valve, and drives the threephase generator generating.The electric energy that system sends is three-phase alternating current, and rated voltage is 380V, can incorporate electrical network in factory into through after pressure regulation, or directly gives consumer and use.The working substance steam of discharging from the low boiling working fluid steam turbine is saturated liquid by magnesium rib-pipe type condenser condenses, enter fluid reservoir, fluid reservoir can be guaranteed the working medium circulating pump continuous pressure, and working medium circulating pump is sent in straight tube plate heat pipe heat exchanger after worker quality liquid is pressurizeed, the circulation of a beginning new round.The recirculated water of coming from cooling tower drives by water circulating pump, enters in magnesium rib-pipe type condenser to absorb heat, tries hard to recommend in Natural Circulation to enter in cooling tower under moving, emits heat, becomes water at low temperature, the circulation of a beginning new round.
2. the high ash-laden gas integration dust-removing of electric furnace according to claim 1 method is characterized in that: adopting R245ca is the circulation organic working medium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101423080A CN103383193A (en) | 2012-05-04 | 2012-05-04 | Integrated dust removing method for high-dust flue gas of electric furnace |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101423080A CN103383193A (en) | 2012-05-04 | 2012-05-04 | Integrated dust removing method for high-dust flue gas of electric furnace |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN103383193A true CN103383193A (en) | 2013-11-06 |
Family
ID=49491052
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012101423080A Pending CN103383193A (en) | 2012-05-04 | 2012-05-04 | Integrated dust removing method for high-dust flue gas of electric furnace |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103383193A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627771A (en) * | 2016-01-20 | 2016-06-01 | 王振铎 | Application of low-temperature phase-change medium waste heat recovery and utilization system in flue gas dust removal system |
| CN108866342A (en) * | 2018-08-29 | 2018-11-23 | 兰州有色冶金设计研究院有限公司 | A kind of device and method handling spent noble metals bearing catalysts |
-
2012
- 2012-05-04 CN CN2012101423080A patent/CN103383193A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105627771A (en) * | 2016-01-20 | 2016-06-01 | 王振铎 | Application of low-temperature phase-change medium waste heat recovery and utilization system in flue gas dust removal system |
| CN108866342A (en) * | 2018-08-29 | 2018-11-23 | 兰州有色冶金设计研究院有限公司 | A kind of device and method handling spent noble metals bearing catalysts |
| CN108866342B (en) * | 2018-08-29 | 2023-11-17 | 兰州有色冶金设计研究院有限公司 | Device and method for treating waste catalyst containing noble metal |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103017547A (en) | Power generation, energy saving and dedusting method by utilizing heat waste of exhaust gas in electric furnace through organic rankine cycle | |
| CN202188771U (en) | Device special for organic rankine cogeneration, energy saving and dedusting of electric furnace high-temperature alternating smoke | |
| CN202145101U (en) | Organic rankine cycle waste heat power generating and dedusting special device for flue gas of metallurgical furnace | |
| CN103017552A (en) | Organic Rankine cycle waste heat power generation and dust removal method of flue gas of metallurgical furnace | |
| CN103383193A (en) | Integrated dust removing method for high-dust flue gas of electric furnace | |
| CN103836987A (en) | Flue gas waste heat power-generation energy-conservation and dust-removal method for electric furnace with liquid storage tank | |
| CN103017553A (en) | Regenerative submerged arc furnace flue gas waste heat power generation method | |
| CN201837260U (en) | Electric furnace flue gas organic Rankine cycle waste heat power generation and dust removing special device | |
| CN103383199A (en) | Integrated waste heat generating and dust removing method utilizing flue gas from interior and exterior of electric furnace | |
| CN103134335A (en) | Electric furnace internally and externally discharged smoke waste heat power generation energy saving dust removing method | |
| CN202915733U (en) | Special energy-saving dust-removing equipment for generating power by using high-temperature flue gas from metallurgical furnace | |
| CN202747822U (en) | Special device for high-temperature alternating smoke gas residual heat power generation, energy conservation and dust removal of metallurgical furnace | |
| CN103383194A (en) | Integrated dedusting method of inside-row and outside-row exhaust gas in metallurgical furnace with liquid storage tank | |
| CN103017548A (en) | Waste heat power generation energy-saving dust removal method of internal and external exhaust flue gas of metallurgical furnace | |
| CN202254894U (en) | Electric furnace smoke multilevel organic ranking cycle waste heat generating and dedusting special device | |
| CN103383198A (en) | Waste heat power generation and dust removal integrated method for flue gas exhausted from metallurgical furnace | |
| CN103134333A (en) | Power generation energy-saving and dedusting method by using waste heat of exhausted smoke in semi-airtight electric furnace | |
| CN103836990A (en) | Electric furnace flue gas organic Rankine waste heat power-generation energy-conservation and dust-removal method | |
| CN103836989A (en) | Flue gas waste heat power-generation energy-conservation and dust-removal method for electric furnace with thermal storage temperature evening device | |
| CN202747823U (en) | Metallurgical furnace smoke waste heat power generation energy-saving dedusting special equipment with liquid storage tank | |
| CN105318727A (en) | Method for utilizing residual heat of flue gas from metallurgical furnace | |
| CN202171400U (en) | Energy-saving dust removal special device capable of generating power by waste heat of exhaust fume in electric furnace | |
| CN103105069A (en) | Electric furnace fume multi-stage organic rankine cycle waste heat electricity generation and dust removing method | |
| CN202915735U (en) | Specific equipment with steam drum for metallurgical furnace flue gas waste heat power generation energy-saving dedusting | |
| CN105890386A (en) | Energy-saving dust removing method for smoke of metallurgical furnace |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20131106 |