CN103383195A - Waste heat utilization and dust removing method for electric furnace flue gas with thermal storage soaking device - Google Patents
Waste heat utilization and dust removing method for electric furnace flue gas with thermal storage soaking device Download PDFInfo
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- CN103383195A CN103383195A CN2012101423288A CN201210142328A CN103383195A CN 103383195 A CN103383195 A CN 103383195A CN 2012101423288 A CN2012101423288 A CN 2012101423288A CN 201210142328 A CN201210142328 A CN 201210142328A CN 103383195 A CN103383195 A CN 103383195A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 78
- 239000003546 flue gas Substances 0.000 title claims abstract description 78
- 239000000428 dust Substances 0.000 title claims abstract description 41
- 238000000034 method Methods 0.000 title claims abstract description 21
- 239000002918 waste heat Substances 0.000 title abstract description 21
- 238000002791 soaking Methods 0.000 title abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 36
- 239000007789 gas Substances 0.000 claims abstract description 17
- 239000002131 composite material Substances 0.000 claims abstract description 11
- 238000001816 cooling Methods 0.000 claims abstract description 11
- 239000012530 fluid Substances 0.000 claims description 20
- 238000009835 boiling Methods 0.000 claims description 12
- 238000002485 combustion reaction Methods 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 8
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 7
- 229910052802 copper Inorganic materials 0.000 claims description 7
- 239000010949 copper Substances 0.000 claims description 7
- 238000005338 heat storage Methods 0.000 claims description 7
- 239000012716 precipitator Substances 0.000 claims description 6
- HBMJWWWQQXIZIP-UHFFFAOYSA-N silicon carbide Chemical compound [Si+]#[C-] HBMJWWWQQXIZIP-UHFFFAOYSA-N 0.000 claims description 6
- 229910010271 silicon carbide Inorganic materials 0.000 claims description 6
- 239000000126 substance Substances 0.000 claims description 6
- 230000000694 effects Effects 0.000 claims description 5
- 238000001914 filtration Methods 0.000 claims description 4
- 239000012535 impurity Substances 0.000 claims description 4
- 239000000463 material Substances 0.000 claims description 4
- AHADSRNLHOHMQK-UHFFFAOYSA-N methylidenecopper Chemical compound [Cu].[C] AHADSRNLHOHMQK-UHFFFAOYSA-N 0.000 claims description 4
- 230000009183 running Effects 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 239000011555 saturated liquid Substances 0.000 claims description 3
- 238000005265 energy consumption Methods 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 abstract 1
- 238000011084 recovery Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 4
- 238000013459 approach Methods 0.000 description 3
- 238000013461 design Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 238000013517 stratification Methods 0.000 description 2
- 229910001021 Ferroalloy Inorganic materials 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
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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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- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
A waste heat utilization and dust removing method for electric furnace flue gas with a thermal storage soaking device is characterized in that flue gas emitted from the interior of an electric furnace enters a settling chamber after being mixed with cold air through a water cooling flue duct, then enters a high-temperature dust remover, the thermal storage soaking device and a gas collection chamber in sequence, emits heat quantity, is pressed into an exhaust pipe through a main air blower, and is emitted into the atmosphere; meanwhile, circulating water enters a heat exchanger to absorb the heat of the flue gas, is converted into steam-water mixture, enters an evaporator, and emits heat quantity; an organic working medium absorbs heat in the evaporator through a working medium pump, is converted into steam, and enters a steam pocket; the working medium steam expands in a steam turbine to apply work, thereby driving a power generator to generate electricity. The method is characterized in that the high-temperature dust remover is a high-temperature resistant C-Cu composite material filter element dust remover; R227ea is adopted as the organic circulating working medium; the thermal storage soaking device is adopted for reducing the fluctuation range and peak value of flue gas; heat energy is converted into high-grade electric energy; the device investment and the operation energy consumption are low.
Description
Technical field
The present invention relates to a kind of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and dust collection method with thermal storage temperature equalizer, 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 annual mass energy that consumes of steel and iron industry, the high-temperature flue gas that produces in smelting process and equipment cooling have been taken away large energy.Because the electric furnace flue gas temperature is very high, the temperature that enters pipeline after capturing is generally 900 ℃ of left and right, and dust concentration reaches 35g/Nm
3, accounting for more than 80% of dust total amount less than the ash of 5um, Dust Capacity is large, and sticking and thin.And the flue-gas temperature big ups and downs, dustiness is large, and light water tubulation waste heat boiler is difficult to apply to the waste heat recovery of ferro-alloy furnace flue gas.At present, heat exchange of heat pipe has successfully applied in the flue gas waste heat recovery of electric furnace, but due to the inherent shortcoming of heat pipe (cost is high, not freeze proof, non-refractory, service life short), make heat pipe residual-heat recovery also face a lot of problems at steel industry universal.
Owing to containing a large amount of dust in flue gas, dust stratification, clogging appear in sticking and thin dust on heat exchange element, not only affect heat exchange efficiency, cause the waste heat boiler steam production not enough, more seriously due to the stifled ash of waste heat boiler, system's fluctuation of service causes to smelt and produces and can't normally carry out, the maintenance of being forced to stop production.
Simultaneously, because the electric furnace flue gas temperature fluctuation is violent, wave amplitude is large, and waste-heat recovery device 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 waste-heat recovery device.This has just reduced the economic worth of waste-heat recovery device relatively, has increased the investment of waste-heat recovery device.
Summary of the invention
For the problems referred to above, the invention provides a kind of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and dust collection method with thermal storage temperature equalizer, can not only effectively reduce electric furnace flue gas temperature fluctuation amplitude by the method, cooling high temperature flue gas efficiently, heat energy in recovered flue gas is converted into the high-grade electric energy to greatest extent, can reduce the exhaust temperature of flue gas simultaneously, improves dust collection capacity, obtain good dust removing effects, the dust concentration 12mg/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:
A kind of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and dust collection method with thermal storage temperature equalizer, it is characterized in that: electric furnace flue gas of the present invention is sneaked into cold wind by discharging in stove through water-cooled flue, enters combustion settling chamber after the burning CO gas; CO gas in flue gas is fully burnt, 650 ℃ of the flue-gas temperatures of adjusting control expansion chamber, the flue gas of process combustion settling chamber enters hot precipitator, dust concentration 12mg/Nm after dedusting
3High-temperature flue gas through dedusting enters thermal storage temperature equalizer, after the heat-accumulating and temperature-equalizing effect of composite material of silicon carbide heat storage in thermal storage temperature equalizer to high-temperature flue gas, flue gas enters in collection chamber, high-temperature flue gas is emitted heat, complete heat exchange, temperature is down to 80 ℃ of left and right, is pressed into aiutage by main air blower and enters atmosphere.Simultaneously, recirculated water drives by the heat exchanger feed pump, enter the heat that absorbs flue gas in the primary surface heat exchanger that is installed in collection chamber, form steam water interface, steam water interface is tried hard to recommend in Natural Circulation and is entered in shell-and-tube evaporator under moving, emits heat, becomes water at low temperature, water at low temperature flows into circulating water pool, the circulation of a beginning new round.Low boiling working fluid drives by working medium pump, absorbs the heat of steam water interface in shell-and-tube evaporator, 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 copper fin-plate 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 shell-and-tube evaporator 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 copper fin-plate 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: hot precipitator of the present invention is high temperature resistant composite carbon-copper material filter-element dust collector.
Further be characterised in that: it is the circulation organic working medium that the present invention adopts R227ea.
The invention has the beneficial effects as follows: because the electric furnace flue gas temperature fluctuation is violent, the flue-gas temperature peak value is high, and after flue gas was processed by thermal storage temperature equalizer of the present invention, the flue-gas temperature fluctuating range can greatly reduce, and has also reduced the peak value of flue-gas temperature simultaneously.Flue gas through thermal storage temperature equalizer advances heat exchanger, due to the flue-gas temperature peak reduction, the device for generating power by waste heat investment is reduced; The flue-gas temperature fluctuating range reduces, and is conducive to improve the stability of device for generating power by waste heat, increases the service life; Simultaneously, due to after heat exchanger of the present invention is placed on deduster, the thermal source dust content is low, can not consider when equipment manufactures and designs, therefore can the design of heat exchange core cell spacing of fin is very little; And need not unload ash, deashing, defeated grey facility; UTILIZATION OF VESIDUAL HEAT IN facility volume reduces, and maintenance reduces simultaneously, has also extended the service life of heat exchanger, and dust emission concentration is lower.
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, solve the problem of expanding with heat and contract with cold;
5, heat exchanger dust stratification not, do not stop up;
6, improve device for generating power by waste heat efficient;
7, reduce the device for generating power by waste heat investment.
Description of drawings
Fig. 1 realizes that the present invention is a kind of with the electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN of thermal storage temperature equalizer and the process chart of dust collection method.
in figure, 1. electric furnace, 2. water-cooled flue, 3. combustion settling chamber, 4. hot precipitator, 5. thermal storage temperature equalizer, 6. gas approach, 7. composite material of silicon carbide heat storage, 8. ash bucket, 9. shock-wave ash-clearing device, 10. exhanst gas outlet, 11. collection chamber, 12. primary surface heat exchanger, 13. heat exchanger feed pump, 14. circulating water pool, 15. shell-and-tube evaporator, 16. working medium circulating pump, 17. drum, 18. fluid reservoir, 19. low boiling working fluid steam turbine, 20. threephase generator, 21. water circulating pump, 22. copper fin-plate type condenser, 23. cooling tower, 24. main air blower, 25. aiutage.
The specific embodiment
The invention will be further described below in conjunction with accompanying drawing:
As shown in Figure 1: a kind of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and dust collection method step with thermal storage temperature equalizer of the present invention is as follows: 90t/h electric furnace 1 flue gas flow 20 * 10
4Nm
3/ h, 900 ℃ of temperature, dust content 35g/Nm
3By discharging in stove, sneak into cold wind through water-cooled flue 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, 650 ℃ of the flue-gas temperatures of adjusting control expansion chamber; Flue gas through combustion settling chamber enters hot precipitator 4, dust concentration 12mg/Nm after dedusting
3High-temperature flue gas through dedusting enters thermal storage temperature equalizer 5, after heat-accumulating and temperature-equalizing effect by 7 pairs of high-temperature flue gas of composite material of silicon carbide heat storage in thermal storage temperature equalizer 5, flue gas enters in collection chamber 11, high-temperature flue gas is emitted heat, complete heat exchange, temperature is down to 80 ℃, is pressed into aiutage 25 by main air blower 24 and enters atmosphere.Simultaneously, recirculated water drives by heat exchanger feed pump 13, enter the heat that absorbs flue gas in the primary surface heat exchanger 12 that is installed in collection chamber 11, form steam water interface, steam water interface is tried hard to recommend in Natural Circulation and is entered in shell-and-tube evaporator 15 under moving, emits heat, becomes water at low temperature, water at low temperature flows into circulating water pool 14, the circulation of a beginning new round.Low boiling working fluid drives by working medium pump 16, absorbs the heat of steam water interface in shell-and-tube evaporator 15, becomes saturated vapor, enters drum 17, but supersaturation moisture content and impurity in drum 17 filtering sources of the gas are guaranteed steam turbine 19 even runnings.Working substance steam in the interior expansion acting of low boiling working fluid steam turbine 19, and drives threephase generator 20 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 19 is condensed into saturated liquid by copper fin-plate type condenser 22, enter fluid reservoir 18, fluid reservoir 18 can be guaranteed working medium circulating pump 16 continuous pressures, working medium circulating pump 16 is sent in shell-and-tube evaporator 15 after worker quality liquid is pressurizeed, the circulation of a beginning new round.The recirculated water of coming from cooling tower 23 drives by water circulating pump 21, enters in copper fin-plate type condenser 22 to absorb heat, tries hard to recommend in Natural Circulation to enter in cooling tower 23 under moving, emits heat, becomes water at low temperature, the circulation of a beginning new round.
Described thermal storage temperature equalizer 5 comprises gas approach 6, composite material of silicon carbide heat storage 7, shock-wave ash-clearing device 9, exhanst gas outlet 10 and ash bucket 8, described composite material of silicon carbide heat storage 7 is arranged between gas approach 6 and exhanst gas outlet 10, and described shock-wave ash-clearing device 9 step-by-step arrangements are between heat storage 7.
Described low boiling working fluid is R227ea, the power pressure that enters the low boiling working fluid steam turbine is 2.85MPa, and when the power pressure after the acting of expanding was 0.35MPa, system's electromotive power output was 2500KW, Rankine cycle efficient is 22.5%, and the flue-gas temperature that system discharges is 80 ℃.
Adopt waste-heat recovery device after first dedusting, namely first high-temperature dust-containing flue gas being entered the composite carbon-copper material filter-element dust collector purifies, composite carbon-copper material filter core in deduster, generally can bear the long-term work temperature of 700 ℃ of left and right, high energy bears the high temperature of 800 ℃, and can bear that high temperature is oarse-grained to be washed away, therefore can the direct purification high-temperature flue gas, and do not need to do any pretreatment.Dust concentration after purification is down to 12mg/Nm
3Become clean flue gas, device for generating power by waste heat does not need to process the problems such as the obstruction, deashing of dust.
Because thermal storage temperature equalizer can be to the flue-gas temperature peak load shifting, reduce flue gas maximum temperature, reduce the fluctuating range of flue-gas temperature, alleviate the rapid drawdown that rises sharply of flue-gas temperature, thereby can reduce the investment of device for generating power by waste heat, improve the stability of device for generating power by waste heat, and can configure safely all kinds of waste heat power generation equipments.
Maximum characteristics of the present invention are to adopt thermal storage temperature equalizer, after flue gas is processed by thermal storage temperature equalizer of the present invention, the flue-gas temperature fluctuating range can greatly reduce, and has also reduced the peak value of flue-gas temperature simultaneously, and the heat energy in recovered flue gas is converted into the high-grade electric energy to greatest extent.
Take the waste heat recovery of 90t/h 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 inventive method heat energy in recovered flue gas to greatest extent is converted into the high-grade electric energy, primary surface heat exchanger need not unload ash, deashing, defeated grey facility, extended the service life of equipment, can reduce simultaneously the exhaust temperature of flue gas, and do not affect the stable and continuous of electric furnace steel making production, the environment protecting that can also obtain, the dust concentration 12mg/Nm of discharging
3Plant investment is low, operation energy consumption is low.
Claims (3)
1. electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and dust collection method with a thermal storage temperature equalizer, it is characterized in that: electric furnace flue gas of the present invention is sneaked into cold wind by discharging in stove through water-cooled flue, enters combustion settling chamber after the burning CO gas; CO gas in flue gas is fully burnt, 650 ℃ of the flue-gas temperatures of adjusting control expansion chamber, the flue gas of process combustion settling chamber enters hot precipitator, dust concentration 12mg/Nm3 after dedusting.High-temperature flue gas through dedusting enters thermal storage temperature equalizer, after the heat-accumulating and temperature-equalizing effect of composite material of silicon carbide heat storage in thermal storage temperature equalizer to high-temperature flue gas, flue gas enters in collection chamber, high-temperature flue gas is emitted heat, complete heat exchange, temperature is down to 80 ℃ of left and right, is pressed into aiutage by main air blower and enters atmosphere.Simultaneously, recirculated water drives by the heat exchanger feed pump, enter the heat that absorbs flue gas in the primary surface heat exchanger that is installed in collection chamber, form steam water interface, steam water interface is tried hard to recommend in Natural Circulation and is entered in shell-and-tube evaporator under moving, emits heat, becomes water at low temperature, water at low temperature flows into circulating water pool, the circulation of a beginning new round.Low boiling working fluid drives by working medium pump, absorbs the heat of steam water interface in shell-and-tube evaporator, 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 copper fin-plate 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 shell-and-tube evaporator 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 copper fin-plate 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. a kind of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and dust collection method with thermal storage temperature equalizer according to claim 1, it is characterized in that: described hot precipitator is high temperature resistant composite carbon-copper material filter-element dust collector.
3. a kind of electric furnace flue gas UTILIZATION OF VESIDUAL HEAT IN and dust collection method with thermal storage temperature equalizer according to claim 1 is characterized in that: adopting R227ea is the circulation organic working medium.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012101423288A CN103383195A (en) | 2012-05-04 | 2012-05-04 | Waste heat utilization and dust removing method for electric furnace flue gas with thermal storage soaking device |
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| CN2012101423288A CN103383195A (en) | 2012-05-04 | 2012-05-04 | Waste heat utilization and dust removing method for electric furnace flue gas with thermal storage soaking device |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884007A (en) * | 2014-02-24 | 2014-06-25 | 浙江大学 | Multi-valve regulation water supply system of boiler |
| CN103940248A (en) * | 2014-04-10 | 2014-07-23 | 上海宝钢节能环保技术有限公司 | Heat accumulation type electric furnace flue gas waste heat recovery system |
| CN104912634A (en) * | 2015-05-06 | 2015-09-16 | 东南大学 | Flue gas dust removal and waste heat utilization system for electricity generation cabin in South Pole |
-
2012
- 2012-05-04 CN CN2012101423288A patent/CN103383195A/en active Pending
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103884007A (en) * | 2014-02-24 | 2014-06-25 | 浙江大学 | Multi-valve regulation water supply system of boiler |
| CN103884007B (en) * | 2014-02-24 | 2016-01-20 | 浙江大学 | Many valve regulation and control feed water systems of boiler |
| CN103940248A (en) * | 2014-04-10 | 2014-07-23 | 上海宝钢节能环保技术有限公司 | Heat accumulation type electric furnace flue gas waste heat recovery system |
| CN103940248B (en) * | 2014-04-10 | 2016-04-20 | 上海宝钢节能环保技术有限公司 | A kind of heat accumulating type electric boiler flue gas waste heat recovery system |
| CN104912634A (en) * | 2015-05-06 | 2015-09-16 | 东南大学 | Flue gas dust removal and waste heat utilization system for electricity generation cabin in South Pole |
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Application publication date: 20131106 |