CN206593492U - A kind of AOD furnace off-gas recovery afterheat generating system - Google Patents
A kind of AOD furnace off-gas recovery afterheat generating system Download PDFInfo
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- CN206593492U CN206593492U CN201720192794.5U CN201720192794U CN206593492U CN 206593492 U CN206593492 U CN 206593492U CN 201720192794 U CN201720192794 U CN 201720192794U CN 206593492 U CN206593492 U CN 206593492U
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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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- 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
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
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Abstract
The utility model is related to iron and steel metallurgical industry energy-conserving and environment-protective technical fiel, more particularly to a kind of AOD furnace off-gas recovery afterheat generating system.The AOD furnace off-gas recovery afterheat generating system adds the convection heating surface device for the low-temperature flue gas duct section being arranged on after evaporated flue, feed water and return to drum after being converted into steam with the flue gas heat exchange in convection heating surface device when convection heating surface device, add overall quantity of steam.Generated electricity jointly using the steam produced by evaporated flue and convection heating surface device, improve the fume afterheat utilization ratio of AOD furnace, improve the steam production and generated energy of steam, reach the effect that residual heat integrative is utilized, and reduce the exhaust gas temperature of flue gas, so that efficiency of dust collection is improved, environmental pollution is reduced.
Description
Technical field
The utility model is related to iron and steel metallurgical industry energy-conserving and environment-protective technical fiel, more particularly to a kind of AOD furnace off-gas recovery
Afterheat generating system.
Background technology
Steel industry is the important basic raw material industry of national economy, is also highly energy-consuming, high pollution industry.Steel industry
The substantial amounts of energy will be consumed every year, it is necessary to pay special attention to the reasonable utilization of the energy in the case of today's society energy scarcity
And environmental protection, so reduction energy resource consumption and reduction environmental pollution are the directions of steel industry development.Energy consumption is low and environment is dirty
The small production technology of dye can not only improve the economic benefit of enterprise itself, can also increase social benefit, be that iron and steel enterprise exists
Occupy first chance in competition.Steel industry energy-saving potential is huge.Therefore, the numerous and confused improved technology of home and abroad large enterprise, utilizes AOD
Furnace flue gas exhaust heat recovery system etc. carries out energy-saving and comprehensive utilization of energy.AOD furnace flue gas waste heat recovery system is by flue gas
Residual heat resources are fully reclaimed, and are allowed to be converted into utilizable steam, take into account energy-conservation and environmentally friendly double function.But it is existing
AOD furnace flue gas waste heat recovery is all the fume afterheat that high temperature section part is only reclaimed using evaporated flue similar device, flue gas utilization
Rate is than relatively low so that also has substantial amounts of fume afterheat to be discharged into through radiating in air after AOD furnace, causes energy waste and make
Into environmental pollution.
Utility model content
The purpose of this utility model is to avoid above-mentioned weak point of the prior art from improving AOD there is provided one kind
The AOD furnace off-gas recovery afterheat generating system of the fume afterheat utilization ratio of stove.
The purpose of this utility model is achieved through the following technical solutions：
A kind of AOD furnace off-gas recovery afterheat generating system is provided, including is connected with electricity generation system E drum and by flue gas
Steam in AOD furnace that pipeline is sequentially connected, evaporated flue, deduster, the drum enters the system that generates electricity from steam (vapor) outlet f
Unite E, returns to the drum from feed-water intake a after the electricity generation system E is converted into feedwater, the evaporated flue is provided with feedwater
Entrance m and steam (vapor) outlet n, the drum, which is additionally provided with, is connected respectively to feed-water intake m and steam (vapor) outlet n feedwater outlet b and steaming
Feedwater in vapour entrance c, the drum enters the evaporated flue, the evaporated flue by feedwater outlet b and feed-water intake m
The steam that interior feedwater is thermally generated returns to the drum by steam (vapor) outlet n and steam inlet c, it is characterised in that：The vapour
Bag is additionally provided with feedwater outlet d and steam inlet e, and convection heating surface dress is connected between the evaporated flue and the deduster
Put, the convection heating surface device is provided with the feedwater outlet d and steam inlet e that are connected respectively to the drum feed-water intake p
With steam (vapor) outlet q, the feedwater in the drum enters the convection heating surface device by feedwater outlet e and feed-water intake p, entered
The feedwater for entering the convection heating surface device is passed through with the steam generated after the flue gas heat exchange in the convection heating surface device steams
Vapor outlet q and steam inlet d return to the drum.
Wherein, the electricity generation system E includes the steamer for being connected respectively to the steam (vapor) outlet f and feed-water intake a of the drum
Machine and feed pump, the steam turbine connect to being connected with turn between the feed pump on generator and condenser, the condenser
Cooling tower is connected to, the steam and the cooling tower for flowing through the condenser exchange heat to form the feedwater outflow condenser, described to give
Water returns to the drum by feed pump from feed-water intake a.
Wherein, it is connected with storage heater between the steam (vapor) outlet f and the steam turbine of the drum.
Wherein, the steam turbine is condensing turbine.
Wherein, oxygen-eliminating device is connected between the condenser and the feed pump, the feedwater for flowing out the condenser is passed through
Enter the feed pump after the oxygen-eliminating device deoxygenation.
Wherein, the deduster is connected with blower fan and chimney, flow out the flue gas of the deduster after the blower fan from
The chimney discharge.
The beneficial effects of the utility model：AOD furnace off-gas recovery afterheat generating system of the present utility model passes through in vaporization
Increase convection heating surface device after flue, feedwater is by flue gas heat exchange during convection heating surface device and in convection heating surface device
It is converted into after steam and returns to drum, adds overall quantity of steam.Using produced by evaporated flue and convection heating surface device
Steam is generated electricity jointly, improves the steam production and generated energy of steam, and then improves to enter the fume afterheat that AOD furnace is discharged
The efficiency that row is utilized, reaches the effect that residual heat integrative is utilized, and reduce the exhaust gas temperature of flue gas so that efficiency of dust collection is carried
Height, reduces environmental pollution.
Brief description of the drawings
Fig. 1 is the structural representation of AOD furnace off-gas recovery afterheat generating system；
Include in Fig. 1：1 --- AOD furnace, 2 --- evaporated flue, 3 --- drum, 4 --- deduster, 5 --- blower fan,
6 --- chimney, 7 --- steam turbine, 8 --- generator, 9 --- condenser, 10 --- cooling tower, 11 --- water circulating pump,
12 --- --- --- feed pump, 15 --- storage heater, 16 --- convection heating surface devices of oxygen-eliminating device, 14 of condensate pump, 13.
Embodiment
AOD furnace off-gas recovery afterheat generating system is further described with the following Examples.
Wherein, electricity generation system E includes being connected respectively to the steam (vapor) outlet f and feed-water intake a of drum steam turbine and feedwater
Pump
As shown in figure 1, the AOD furnace off-gas recovery afterheat generating system includes the AOD furnace being sequentially connected by flue
1st, evaporated flue 2, convection heating surface device 16, deduster 4, blower fan 5 and chimney 6, in addition to be connected with electricity generation system E drum
3.Drum 3 is provided with feed-water intake a, feedwater outlet b, steam inlet c, feedwater outlet d, steam inlet e and steam (vapor) outlet f, vaporization
Flue 2 is provided with feed-water intake m and steam (vapor) outlet n, and convection heating surface device 16 is provided with the feedwater outlet d for being connected respectively to drum 3
With steam inlet e feed-water intake p and steam (vapor) outlet q.The feed-water intake a of drum 3 is connected to electricity generation system E feed pump 14,
The steam (vapor) outlet f of drum 3 is connected to electricity generation system E steam turbine 7 by a storage heater 15, steam turbine 7 to feed pump 14 it
Between be connected with generator 8, condenser 9, condensate pump 12 and oxygen-eliminating device 13 in turn, condenser 9 is connected with cooling tower 10 and circulation
Water pump 11.
The warp of feedwater all the way that the high-temperature flue gas that the work of AOD furnace 1 is produced is entered in evaporated flue 2, drum 3 by flue
Feedwater outlet b and feed-water intake m is crossed into evaporated flue 2, into feedwater and the high temperature cigarette in evaporated flue 2 of evaporated flue 2
The steam generated after gas heat exchange returns to drum 3 by steam (vapor) outlet n and steam inlet c.High-temperature flue gas in evaporated flue 2 is with giving
Low-temperature flue gas, another road that low-temperature flue gas enters in convection heating surface device 16, drum 3 via flue are formed after water heat exchange
Feedwater by feedwater outlet e and feed-water intake p enter convection heating surface device 16, into convection heating surface device 16 feedwater with
The steam generated after low-temperature flue gas heat exchange in convection heating surface device 16 returns to drum by steam (vapor) outlet q and steam inlet d
3.The amount of heat of low-temperature flue gas is absorbed in convection heating surface device 16 by the evaporation of feedwater so that convection current is heated
The flue-gas temperature that face device 16 is discharged is substantially reduced.The relatively low flue gas of temperature enters after the dedusting of deduster 4 by blower fan 5 from chimney
6 are discharged in air, and the flue-gas temperature reduction into deduster 4 is also beneficial to improve efficiency of dust collection raising, reduces environment dirty
Dye.By increasing convection heating surface device 16 after evaporated flue 2, the low-temperature flue gas discharged after evaporated flue 2 cools
Rationally utilized so that the high-temperature flue gas that AOD furnace 1 is produced repeatedly is utilized, and the heat in high-temperature flue gas is by greatest extent
Absorption.Feed water and returned after being converted into steam with the flue gas heat exchange in convection heating surface device 16 when convection heating surface device 16
To drum 3, overall quantity of steam is added.
Steam in drum 3 enters storage heater 15 by steam (vapor) outlet f, because AOD furnace 1 is discontinuous operation, so from
The quantity of steam that evaporated flue 2 comes out is unstable, and accumulation of heat is carried out to saturated vapor by storage heater 15, can be carried for electricity generation system E
For stable steam.Steam enters electricity generation system E after the voltage stabilizing accumulation of heat of storage heater 15 and drives steam turbine 7 to rotate, and then drives
Generator 8 generates electricity.The steam turbine 7 is condensing turbine, and Steam Actuation steam turbine 7 enters condenser 9, steam turbine 7 after rotating
The steam for doing part work(is released out of steam turbine 7 to heat the boiler feedwater of cooling tower 10, is connected with condenser 9
The steam and the cooling water of cooling tower 10 that cooling water is pumped into condenser 9, condenser 9 by cooling tower 10 by water circulating pump 11 enter
Row cycle heat exchange, the steam discharge of steam turbine 7 is cooled in condenser 9 be condensed into water during, volume reduces suddenly, thus originally
Confined space formation vacuum full of steam, it reduce the exhaust steam pressure of steam turbine 7, so as to improve the thermal efficiency of device.
The feedwater that generates flows to oxygen-eliminating device 13 by condensate pump 12 after steam cooling, feedwater after the deoxygenation of oxygen-eliminating device 13 again by
Water pump 14 is returned in drum 3 by feed-water intake a, so as to complete whole electricity generation system E closed type steam-water circulation.
This AOD furnace off-gas recovery afterheat generating system adds the low-temperature flue gas duct section that is arranged on after evaporated flue 2
Convection heating surface device 16, feedwater during convection heating surface device 16 with the flue gas heat exchange in convection heating surface device 16 by converting
To return to drum 3 after steam, overall quantity of steam is added.Using produced by evaporated flue 2 and convection heating surface device 16
Steam is generated electricity jointly, is improved the fume afterheat utilization ratio of AOD furnace 1, is improved the steam production and generated energy of steam, reach
The effect that residual heat integrative is utilized, and reduce the exhaust gas temperature of flue gas so that efficiency of dust collection is improved, and reduces environmental pollution.
Finally it should be noted that above example is only illustrating the technical solution of the utility model, rather than to this reality
With the limitation of novel protected scope, although being explained with reference to preferred embodiment to the utility model, this area it is general
Lead to it will be appreciated by the skilled person that can be modified to the technical solution of the utility model or equivalent substitution, without departing from this
The spirit and scope of utility model technical scheme.
Claims (6)
1. a kind of AOD furnace off-gas recovery afterheat generating system, including it is connected with electricity generation system E drum（3）With pass through fume pipe
The AOD furnace that road is sequentially connected（1）, evaporated flue（2）, deduster（4）, the drum（3）Interior steam enters from steam (vapor) outlet f
The electricity generation system E, the drum is returned to after the electricity generation system E is converted into feedwater from feed-water intake a（3）, the vapour
Change flue（2）Provided with feed-water intake m and steam (vapor) outlet n, the drum（3）It is additionally provided with and is connected respectively to feed-water intake m and steam
Export n feedwater outlet b and steam inlet c, the drum（3）Interior feedwater enters institute by feedwater outlet b and feed-water intake m
State evaporated flue（2）, the evaporated flue（2）The steam that interior feedwater is thermally generated is returned by steam (vapor) outlet n and steam inlet c
To the drum（3）, it is characterised in that：The drum（3）It is additionally provided with feedwater outlet d and steam inlet e, the evaporated flue
（2）With the deduster（4）Between be connected with convection heating surface device（16）, the convection heating surface device（16）Provided with respectively
It is connected to the drum（3）Feedwater outlet d and steam inlet e feed-water intake p and steam (vapor) outlet q, the drum（3）Interior
Feedwater enters the convection heating surface device by feedwater outlet e and feed-water intake p（16）, into the convection heating surface device
（16）Feedwater and the convection heating surface device（16）The steam generated after interior flue gas heat exchange passes through steam (vapor) outlet q and steam
Entrance d returns to the drum（3）.
2. a kind of AOD furnace off-gas recovery afterheat generating system according to claim 1, it is characterised in that：The system that generates electricity
System E includes being connected respectively to the drum（3）Steam (vapor) outlet f and feed-water intake a steam turbine（7）And feed pump（14）, institute
State steam turbine（7）To the feed pump（14）Between be connected with generator in turn（8）And condenser（9）, the condenser（9）On
It is connected with cooling tower（10）, flow through the condenser（9）Steam and the cooling tower（10）It is described that heat exchange forms feedwater outflow
Condenser（9）, the feedwater is by the feed pump（14）Afterwards the drum is flowed back to from feed-water intake a（3）.
3. a kind of AOD furnace off-gas recovery afterheat generating system according to claim 2, it is characterised in that：The drum（3）
Steam (vapor) outlet f and the steam turbine（7）Between be connected with storage heater（15）.
4. a kind of AOD furnace off-gas recovery afterheat generating system according to Claims 2 or 3, it is characterised in that：The steamer
Machine（7）It is condensing turbine.
5. a kind of AOD furnace off-gas recovery afterheat generating system according to claim 2, it is characterised in that：The condenser
（9）With the feed pump（14）Between be connected with oxygen-eliminating device（13）, flow out the condenser（9）Feedwater pass through the oxygen-eliminating device
（13）Enter the feed pump after deoxygenation（14）.
6. a kind of AOD furnace off-gas recovery afterheat generating system according to claim 1, it is characterised in that：The deduster
（4）It is connected with blower fan（5）And chimney（6）, flow out the deduster（4）Flue gas pass through the blower fan（5）Afterwards from the chimney
（6）Discharge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720192794.5U CN206593492U (en) | 2017-03-01 | 2017-03-01 | A kind of AOD furnace off-gas recovery afterheat generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720192794.5U CN206593492U (en) | 2017-03-01 | 2017-03-01 | A kind of AOD furnace off-gas recovery afterheat generating system |
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| Publication Number | Publication Date |
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| CN206593492U true CN206593492U (en) | 2017-10-27 |
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| CN201720192794.5U Active CN206593492U (en) | 2017-03-01 | 2017-03-01 | A kind of AOD furnace off-gas recovery afterheat generating system |
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| CN (1) | CN206593492U (en) |
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2017
- 2017-03-01 CN CN201720192794.5U patent/CN206593492U/en active Active
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