CN108645226A - Electric furnace flue gas double-working-medium heat exchange composite circulation superheated steam system - Google Patents
Electric furnace flue gas double-working-medium heat exchange composite circulation superheated steam system Download PDFInfo
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- CN108645226A CN108645226A CN201810505161.4A CN201810505161A CN108645226A CN 108645226 A CN108645226 A CN 108645226A CN 201810505161 A CN201810505161 A CN 201810505161A CN 108645226 A CN108645226 A CN 108645226A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 239000003546 flue gas Substances 0.000 title claims abstract description 53
- 239000002131 composite material Substances 0.000 title abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000002918 waste heat Substances 0.000 claims abstract description 29
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 238000001816 cooling Methods 0.000 claims description 69
- 238000005338 heat storage Methods 0.000 claims description 33
- 230000002093 peripheral effect Effects 0.000 claims description 11
- 229910000831 Steel Inorganic materials 0.000 claims description 8
- 230000007423 decrease Effects 0.000 claims description 8
- 239000010959 steel Substances 0.000 claims description 8
- 238000007789 sealing Methods 0.000 claims description 5
- 239000011449 brick Substances 0.000 claims description 4
- 238000010276 construction Methods 0.000 claims description 4
- 230000007246 mechanism Effects 0.000 claims description 4
- 239000012530 fluid Substances 0.000 claims description 3
- 238000002309 gasification Methods 0.000 claims description 3
- 206010022000 influenza Diseases 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 3
- 230000001174 ascending effect Effects 0.000 abstract 1
- 238000010924 continuous production Methods 0.000 abstract 1
- 238000010248 power generation Methods 0.000 abstract 1
- 229920006395 saturated elastomer Polymers 0.000 description 6
- 238000011084 recovery Methods 0.000 description 5
- 150000003839 salts Chemical class 0.000 description 5
- 238000009825 accumulation Methods 0.000 description 4
- 238000003723 Smelting Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 230000006872 improvement Effects 0.000 description 3
- 229920000742 Cotton Polymers 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- 238000009628 steelmaking Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 235000014171 carbonated beverage Nutrition 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000006392 deoxygenation reaction Methods 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000003517 fume Substances 0.000 description 1
- 230000008676 import Effects 0.000 description 1
- 239000008235 industrial water Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000009421 internal insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000011218 segmentation Effects 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B33/00—Steam-generation plants, e.g. comprising steam boilers of different types in mutual association
- F22B33/18—Combinations of steam boilers with other apparatus
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22G—SUPERHEATING OF STEAM
- F22G1/00—Steam superheating characterised by heating method
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- 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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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Environmental & Geological Engineering (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention discloses an electric furnace flue gas double-working-medium heat exchange composite circulation superheated steam system which comprises a first flue (4), a combustion settling chamber (5), a second flue (6) and a waste heat boiler (8) which are sequentially connected, and further comprises a steam drum (10), a storage tank (17) and a heat accumulator (19), wherein a first outlet of the steam drum (10) is connected with an inlet of a steam-water heat exchanger (20) through a first steam-water circulation descending pipeline (14), and a first inlet of the steam drum (10) is connected with an outlet of the steam-water heat exchanger (20) through a first steam-water circulation ascending pipeline (15). The system can make full use of the waste heat of the flue gas, can be used for continuous production and superheated steam supply power generation and production, and can reduce the electric energy consumption to the maximum extent under the condition of ensuring the service life of the device by adopting a water circulation mode combining forced circulation and natural circulation, thereby being more suitable for practical use.
Description
Technical field
The present invention relates to flue gas waste heat recovery technical field, particularly a kind of electric furnace flue gas double-work medium exchanges heat combined-circulation
Superheated steam system.
Background technology
Recently as steel scrap rise in price, domestic electric furnace all proceeds by technological innovation, and present hot metal charging rate is by original
10% come has generally been increased to 30%~50% or even 80% or more.The raising of electric furnace hot metal charging rate, corresponding blowing oxygen quantity
It is improved, electric furnace furnace gas increases, and entrained heat is also significantly increased in furnace gas, the economic benefit of electric furnace flue gas waste heat recovery
It is all the more apparent.
The cooling equipment of traditional electric furnace flue gas processing is industrial water cooling, 25 DEG C~30 DEG C of inlet water temperature, exit water temperature
45 DEG C~60 DEG C.Although the cooling water of cycle can be recycled into major part after water process cooling tower, cycle exists every time
About 3% consumption loss, while a large amount of electric energy of the cycle consumption of industry water.In addition, it is crucial that in electric furnace flue gas
Heat does not recycle but completely.
Since 2000, some electric boiler flue gas waste heat recovery systems have been developed successively both at home and abroad, but all there is some
The problem of general character, such as：The defects such as steam parameter is low, quality is not high, high energy consumption, and dimension inspection is inconvenient, service life of equipment is low.
Invention content
In order to solve the problems, such as that existing electric furnace flue gas waste heat recovery effect is not high.It is double that the present invention provides a kind of electric furnace flue gas
Working medium heat exchange combined-circulation superheated steam system, electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system make full use of
Fume waste heat, production is continuous, superheated steam supply is generated electricity and produced and used, and is combined with Natural Circulation by using forced circulation
Water-cycling mode, ensure device life conditions under, power consumption is reduced to greatest extent, thus more suitable for practicality.
The technical solution adopted by the present invention to solve the technical problems is：A kind of electric furnace flue gas double-work medium heat exchange combined-circulation
Superheated steam system, including sequentially connected first flue, combustion settling chamber, the second flue and waste heat boiler, the electric furnace cigarette
Gas double-work medium heat exchange combined-circulation superheated steam system further includes drum, storage tank, heat exchanger and storage heater, is set in waste heat boiler
There are a vapor-water heat exchanger and heat storage exchanger, the first outlet of drum declines pipeline and vapor-water heat exchanger by the first steam/water circulating
Entrance connects, and the first entrance of drum is connected by the outlet of the first steam/water circulating riser culverts and vapor-water heat exchanger, storage tank
Outlet is connected by the entrance of the first intake pipeline and heat storage exchanger, and the entrance of storage tank is changed by the first export pipeline with heat accumulation
The outlet of hot device connects, and storage heater is connected by the entrance of the second intake pipeline and heat exchanger, the outlet connection of heat exchanger
There are the second export pipeline, the fluid of storage heater discharge that can exchange heat by the working medium in heat exchanger and storage tank.
First flue contains the first water-cooling structure, and combustion settling chamber contains head cover and side peripheral wall, and head cover contains the second water cooling
Structure contains shoot door in the peripheral wall of side, and shoot door contains third water-cooling structure.
The electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system further includes oxygen-eliminating device, the hydrospace of oxygen-eliminating device
Outlet by the second steam/water circulating decline pipeline respectively with the entrance of first water-cooling structure, second water-cooling structure entrance and
The entrance of the third water-cooling structure connects, the air space entrance of oxygen-eliminating device by the second steam/water circulating riser culverts respectively with this
The outlet of one water-cooling structure, the outlet of second water-cooling structure are connected with the outlet of the third water-cooling structure.
The second outlet of drum by the second steam/water circulating decline pipeline respectively with the entrance of first water-cooling structure, this
The entrance of two water-cooling structures is connected with the entrance of the third water-cooling structure, and the second entrance of drum is risen by the second steam/water circulating
Pipeline connects with the outlet of first water-cooling structure, the outlet of second water-cooling structure and the outlet of the third water-cooling structure respectively
It connects.
First flue is bend pipe flue, and the first flue contains the epimere flue and hypomere flue by flanged joint, first
The arrival end of flue towards horizontal direction, the outlet end of the first flue downward, the outlet end of the first flue and combustion settling chamber
Head cover grafting.
The electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system further includes slider mechanism, which contains
Have sliding sleeve, trolley and a Mechanical Driven component, one end sealing shroud of sliding sleeve is set to outside the arrival end of the first flue, sliding sleeve it is another
One end sealing shroud is set to outside the outlet end of furnace lid watercooling elbow, and trolley can support sliding sleeve, Mechanical Driven component energy
Enough sliding sleeve and trolley is driven to move back and forth in the horizontal direction.
Sliding sleeve is tubular structure, and the barrel of sliding sleeve is tube-to-tube construction, and first water-cooling structure is located at the first flue
The upper end of the lower end and hypomere flue of epimere flue, combustion settling chamber are cube structure, and connection the is equipped in combustion settling chamber
One flue and the second flue cavity, side peripheral wall are laying fireproof bricks.
The section of second flue is round or rectangular, and the position of the arrival end of the second flue is less than the outlet end of the second flue
Position, between the outlet end of the second flue and the entrance of waste heat boiler be equipped with compensator.
Second flue is adiabatic flue, and the second flue contains the insulating layer and steel pipe set gradually from inside to outside；Alternatively,
Second flue is gasification cooling flue.
Heat exchanger is set in storage tank, and multiple vapor-water heat exchangers vertically arranged are equipped in waste heat boiler, until
Few two vapor-water heat exchangers are located at the top of heat storage exchanger, and at least one vapor-water heat exchanger is located at the lower section of heat storage exchanger,
The operating temperature of heat-conducting medium is 300 DEG C~600 DEG C in heat storage exchanger, and compensation is equipped between adjacent two vapor-water heat exchangers
Device also is provided with compensator, electric preheater is additionally provided in storage tank between vapor-water heat exchanger and heat storage exchanger.
The beneficial effects of the invention are as follows：Electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system can ensure
Under the premise of STEELMAKING PRODUCTION, energy consumption per ton steel is reduced, has recycled high-quality steam, improves full factory's economic benefit, is had many
Advantage and practical value.And it there are no similar structure design in similar product and publishes or use and really belong to innovation.
No matter the more existing electric furnace flue gas treatment technology of the present invention all has larger improvement in product device, structure or function, in skill
It has large improvement in art, and produces handy and practical effect, the extensive utility value with industry is really a novelty,
Progress, practical new design.
Description of the drawings
The accompanying drawings which form a part of this application are used to provide further understanding of the present invention, and of the invention shows
Meaning property embodiment and its explanation are not constituted improper limitations of the present invention for explaining the present invention.
Fig. 1 is the totality of the heat exchange combined-circulation superheated steam system of electric furnace flue gas double-work medium described in the embodiment of the present invention 1
Structural schematic diagram.
Fig. 2 is the totality of the heat exchange combined-circulation superheated steam system of electric furnace flue gas double-work medium described in the embodiment of the present invention 2
Structural schematic diagram.
1, sliding sleeve；2, trolley；3, Mechanical Driven component；4, the first flue；5, combustion settling chamber；6, the second flue；
7, compensator；8, waste heat boiler；9, oxygen-eliminating device；10, drum；11, forced circulation pump；12, the second steam/water circulating declines pipeline；
13, the second steam/water circulating riser culverts；14, the first steam/water circulating declines pipeline；15, the first steam/water circulating riser culverts；16, it stores up
Heat exchanger；17, storage tank；18, heat accumulation pump group；19, storage heater；20, vapor-water heat exchanger；21, electric furnace；
41, epimere flue；42, hypomere flue；43, flange；
51, head cover；52, side peripheral wall；53, shoot door；
171, heat exchanger；172, the second intake pipeline；173, the second export pipeline.
Specific implementation mode
It should be noted that in the absence of conflict, the features in the embodiments and the embodiments of the present application can phase
Mutually combination.The present invention will be described in detail below with reference to the accompanying drawings and embodiments.
Embodiment 1
A kind of electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system, including sequentially connected first flue 4, combustion
Expansion chamber 5, the second flue 6 and waste heat boiler 8 are burnt, the electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system is also wrapped
Drum 10, storage tank 17, heat exchanger 171 and storage heater 19 are included, vapor-water heat exchanger 20 and heat storage exchanger are equipped in waste heat boiler 8
16, the first outlet of drum 10 declines pipeline 14 by the first steam/water circulating and is connect with the entrance of vapor-water heat exchanger 20, drum 10
First entrance connect with the outlet of vapor-water heat exchanger 20 by the first steam/water circulating riser culverts 15, the outlet of storage tank 17 passes through
First intake pipeline is connect with the entrance of heat storage exchanger 16, and the entrance of storage tank 17 passes through the first export pipeline and heat storage exchanger
16 outlet connection, storage heater 19 are connect by the second intake pipeline 172 with the entrance of heat exchanger 171, heat exchanger 171
Outlet is connected with the second export pipeline 173, and the fluid that storage heater 19 is discharged can pass through the work in heat exchanger 171 and storage tank 17
Matter exchanges heat, as shown in Figure 1.
In the present invention, the characteristics of discontinuous smelting furnace, is that its production and work are discontinuous, the discontinuous
Low when high when the flue-gas temperature that smelting furnace generates (discontinuous, steady), the discontinuous smelting furnace may include electric furnace for steelmaking.
Currently, being only capable of production saturated vapor in electric furnace waste heat recovery field, storage tank 17 is for storing heat-conducting medium in the present invention, the heat conduction
Medium can enter heat storage exchanger 16 to exchange heat with the flue gas in waste heat boiler 8, and (exchange heat the heat-conducting medium work
Matter) can be fused salt or conduction oil, it is without being limited thereto.By exchanging heat, the heat-conducting medium can play the heat storage of high-temperature flue gas
Come, contain saturated vapor in storage heater 19, the heat-conducting medium can will can be saturated again by heat exchanger 171 in storage tank 17
Steam is heated to be superheated steam.In addition, the heat-conducting medium can be used for producing continuous hot water, steam etc. after heat absorption.
In the present embodiment, the first flue 4 contains the first water-cooling structure, and combustion settling chamber 5 contains head cover 51 and side peripheral wall
52, head cover 51 contains the second water-cooling structure, and shoot door 53 is contained in side peripheral wall 52, and shoot door 53 contains third water-cooling structure.It should
First water-cooling structure, the second water-cooling structure and third water-cooling structure can be fin panel casing or water cooling close arranging pipe.
In the present embodiment, the electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system further includes oxygen-eliminating device 9,
The hydrospace outlet of oxygen-eliminating device 9 by the second steam/water circulating decline pipeline 12 respectively with the entrance of first water-cooling structure, this
The entrance of two water-cooling structures is connected with the entrance of the third water-cooling structure, and the air space entrance of oxygen-eliminating device 9 is followed by the second carbonated drink
Ring riser culverts 13 respectively with the outlet of first water-cooling structure, the outlet of second water-cooling structure and the third water-cooling structure
Outlet connection, as shown in Figure 1.Oxygen-eliminating device 9 by the outlet of first water-cooling structure, the outlet of second water-cooling structure and this
Flue gas heat exchange in three water-cooling structures and the first flue 4 and combustion settling chamber 5.
In the present embodiment, the first flue 4 is bend pipe flue, and the first flue 4 can be sequentially connected two-part or three
Segmentation structure, every section of flue use independent steam/water circulating.If the first flue 4 can be two-part structure, the first flue 4 contains
The epimere flue 41 and hypomere flue 42 connected by flange 43, the arrival end of the first flue 4 is towards horizontal direction, the first flue
4 outlet end downward, the outlet end of the first flue 4 and 51 grafting of head cover of combustion settling chamber 5.
In the present embodiment, the electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system further includes sliding sleeve machine
Structure, the slider mechanism contain sliding sleeve 1, trolley 2 and Mechanical Driven component 3, and sliding sleeve 1 is tubular structure, and one end of sliding sleeve 1 is close
Big envelope is set to outside the arrival end of the first flue 4, and the other end sealing shroud of sliding sleeve 1 is set to the outlet of the bell watercooling elbow of electric furnace 21
End is outer, and the flue gas that electric furnace 21 is discharged can pass through the bell watercooling elbow successively and sliding sleeve 1 enters the first flue 4.Trolley 2
It is used to support sliding sleeve 1, Mechanical Driven component 3 can drive sliding sleeve 1 and trolley 2 to move back and forth in the horizontal direction, such as machinery
Drive component 3 can drive sliding sleeve 1 and trolley 2 left and right directions along Fig. 1 to move back and forth.
In the present embodiment, the barrel of sliding sleeve 1 is tube-to-tube construction, and first water-cooling structure is fin panel casing, institute
State the first water-cooling structure be located at the first flue 4 epimere flue 41 lower end and hypomere flue 42 upper end, combustion settling chamber 5 is
Cube structure, combustion settling chamber 5 is interior to be equipped with the first flue 4 of connection and 6 cavity of the second flue, and side peripheral wall 52 is by laying fireproof bricks
It forms.
In the present embodiment, the section of the second flue 6 can be round or rectangular, the position of the arrival end of the second flue 6
Less than the position of the outlet end of the second flue 6, compensator is equipped between the outlet end and the entrance of waste heat boiler 8 of the second flue 6
7。
In the present embodiment, the second flue 6 can be adiabatic flue, and containing for the second flue 6 is set gradually from inside to outside
Insulating layer and steel pipe；I.e. the outer wall of the second flue 6 is steel pipe, and the inner wall of the second flue 6 is heat-preservation cotton and castable refractory.Or
Person, the second flue 6 or gasification cooling flue, the second flue 6 use nature or forced circulation system, the water of oxygen-eliminating device 9
Space outlet can also decline pipeline 12 by the second steam/water circulating and be connect with the entrance of the cooling wall of the second flue 6, oxygen-eliminating device 9
Air space entrance can also by the second steam/water circulating riser culverts 13 respectively with the outlet of the cooling wall of the second flue 6 connect
It connects.
In the present embodiment, as heat-exchange working medium, operating temperature has certain limitations for fused salt or conduction oil, therefore this
Invention will be arranged in heat storage exchanger 16 in the boiler area after the cooling of part steam-water heat exchanging.Preferred heat exchanger 171 is set
It is placed in storage tank 17, multiple vapor-water heat exchangers 20 vertically arranged, at least two steam-water heat exchangings is equipped in waste heat boiler 8
Device 20 is located at the top of heat storage exchanger 16, and at least one vapor-water heat exchanger 20 is located at the lower section of heat storage exchanger 16.Such as Fig. 1 institutes
Show, two vapor-water heat exchangers 20 are located at the top of heat storage exchanger 16, and a vapor-water heat exchanger 20 is located at heat storage exchanger 16
Lower section.The operating temperature of heat-conducting medium is 300 DEG C~600 DEG C in heat storage exchanger 16, such as using conduction oil as heat-exchange working medium
When, operating temperature is 300 DEG C~400 DEG C.When using fused salt as heat-exchange working medium, operating temperature is 500 DEG C~600 DEG C.It is adjacent
Two vapor-water heat exchangers 20 between be equipped with compensator, also be provided with compensator between vapor-water heat exchanger 20 and heat storage exchanger 16,
It is additionally provided with electric preheater in storage tank 17.
Specifically, the barrel of sliding sleeve 1 is tube-to-tube construction, one end of sliding sleeve 1 is closely attached at furnace lid watercooling elbow,
Sliding sleeve 1 can also decline pipeline 12 by the second steam/water circulating and the second steam/water circulating riser culverts 13 are connect with oxygen-eliminating device 9, from
And make to exchange heat between sliding sleeve 1 and oxygen-eliminating device 9.Trolley 2 is steel structure support, and trolley 2 is equipped with four idler wheels.Machine
Tool drive component 3 controls sliding sleeve horizontal shifting by gear drive.
Natural Circulation or forced circulation may be used in electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system.When
When using forced circulation, the second steam/water circulating declines pipeline 12 and is equipped with forced circulation pump 11.First flue 4 is fin panel casing
Flue, 4 entrance and exit of the first flue are inserted into sliding sleeve 1 and combustion settling chamber 5 respectively.Combustion settling chamber 5 is cuboid, side peripheral wall
52 be laying fireproof bricks, and head cover 51 is fin panel casing, and shoot door 53 uses water cooling close arranging pipe.
Oxygen-eliminating device 9 can also serve as low-pressure drum, and forced circulation pump 11 makes to carry out deoxygenation in above-mentioned oxygen-eliminating device 9 treated water
It accesses in the heat pipe of above-mentioned first flue 4, head cover 51 to exchange heat.The upside of drum 10 is equipped with to be connected with waste heat boiler 8
The downside of logical tedge (the first steam/water circulating riser culverts 15), drum 10 is equipped with down-comer (the first steam/water circulating down-comer
Road 14), separately there is steam output interface etc..The vapor-water heat exchanger 20 being arranged in waste heat boiler, steam water interface import and export are logical
Cross down-comer, tedge is connected to drum 10；
Second flue 6 is internal insulation structure, and outer wall is steel pipe, and inner wall is heat-preservation cotton and castable refractory, the second flue 6
One end is connect with expansion chamber side wall, and the other end of the second flue 6 is connect by compensator 7 with waste heat boiler 8.
Heat storage exchanger 16 is arranged in the inside of waste heat boiler 8,16 pipe type heat transfer structure of heat storage exchanger, and interior tube side is storage
Thermal medium, outer tube side are high-temperature flue gas.Working media inside heat storage exchanger 16 is fused salt or conduction oil, but not limited to this.
The both ends of heat accumulation pump group 18 are separately connected above-mentioned storage tank 17 and heat storage exchanger 16, and circulation power is provided for heat-storage medium.It stores
Produced intermittent, the unstable steam of drum 10 is become stable, continuous steam by hot device 19.The setting of storage tank 17 is pumped in heat accumulation
Outlet, inside set heat exchanger 171, and saturated vapor is heated for storing heat-conducting medium.
The course of work of electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system is described below.
The flue gas that electric furnace 21 is discharged is successively after the first flue 4, combustion settling chamber 5, the second flue 6 and waste heat boiler 8
Discharge, oxygen-eliminating device 9 by the entrance of first water-cooling structure, the entrance of second water-cooling structure and the third water-cooling structure with
Flue gas in first flue 4 and combustion settling chamber 5 exchanges heat, and drum 10 passes through in vapor-water heat exchanger 20 and waste heat boiler 8
Flue gas exchanges heat, and the heat-conducting medium in storage tank 17 enters heat storage exchanger 16 and exchanges heat with the flue gas in waste heat boiler 8, should
Heat-conducting medium is heated after entering heat storage exchanger 16, and the partial heat of flue gas is stored in storage tank 17, in storage heater 19
Saturated vapor is exchanged heat by the heat-conducting medium in heat exchanger 171 and storage tank 17.In this way, the saturated vapor that storage heater 19 exports exists
Stable, continuous superheated steam will be become after heat exchange.
Embodiment 2
The present embodiment is a kind of improvement to embodiment 1, uses oxygen-eliminating device 9 in embodiment 1, progress is that low pressure is followed
Ring.In the present embodiment, electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system uses high-pressure recycle system, such as schemes
Shown in 2, the combined-circulation superheated steam system of electric furnace flue gas double-work medium heat exchange at this time does not contain oxygen-eliminating device 9, the present embodiment and reality
Example 1 is applied main difference is that lacking oxygen-eliminating device 9.
In addition, in the present embodiment, the second outlet of drum 10 by the second steam/water circulating decline pipeline 12 respectively with this
The entrance of first water-cooling structure, second water-cooling structure entrance connected with the entrance of the third water-cooling structure, the of drum 10
Two entrances are gone out with the outlet of first water-cooling structure, second water-cooling structure respectively by the second steam/water circulating riser culverts 13
Mouth is connected with the outlet of the third water-cooling structure.Second steam/water circulating, which declines pipeline 12, can be arranged forced circulation pump.
Remaining technical characteristic of the present embodiment is identical as in embodiment 1, and in order to save length, the present embodiment is no longer detailed
It is thin to introduce.
" double-work medium " is meant that in the present invention：The heat-exchange working medium used in vapor-water heat exchanger 20 can be referred to as the first work
Matter (such as water), the heat-exchange working medium used in heat storage exchanger 16 can be referred to as second of working medium (such as fused salt or conduction oil).
The above, only specific embodiments of the present invention, the range that cannot be implemented with its restriction invention, so it is equivalent
The displacement of component, or according to equivalent variations made by scope of patent protection of the present invention and modification, should all still fall within what this patent was covered
Scope.In addition, between technical characteristic and technical characteristic in the present invention, between technical characteristic and technical solution, technical solution with
Use can be freely combined between technical solution.
Claims (10)
- A kind of combined-circulation superheated steam system 1. electric furnace flue gas double-work medium exchanges heat, which is characterized in that the electric furnace flue gas duplex Matter heat exchange combined-circulation superheated steam system includes sequentially connected first flue (4), combustion settling chamber (5), the second flue (6) With waste heat boiler (8), the electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system further includes drum (10), storage tank (17), heat exchanger (171) and storage heater (19), waste heat boiler (8) is interior to be equipped with vapor-water heat exchanger (20) and heat storage exchanger (16), the first outlet of drum (10) declines pipeline (14) by the first steam/water circulating and the entrance of vapor-water heat exchanger (20) connects It connecing, the first entrance of drum (10) is connect by the first steam/water circulating riser culverts (15) with the outlet of vapor-water heat exchanger (20), The outlet of storage tank (17) is connect by the first intake pipeline with the entrance of heat storage exchanger (16), and the entrance of storage tank (17) passes through One export pipeline is connect with the outlet of heat storage exchanger (16), and storage heater (19) passes through the second intake pipeline and heat exchanger (171) outlet of entrance connection, heat exchanger (171) is connected with the second export pipeline, the fluid energy of storage heater (19) discharge Enough exchanged heat by the working medium in heat exchanger (171) and storage tank (17).
- The combined-circulation superheated steam system 2. electric furnace flue gas double-work medium according to claim 1 exchanges heat, which is characterized in that the One flue (4) contains the first water-cooling structure, and combustion settling chamber (5) contains head cover (51) and side peripheral wall (52), and head cover (51) contains Second water-cooling structure, side peripheral wall (52) is interior to contain shoot door (53), and shoot door (53) contains third water-cooling structure.
- The combined-circulation superheated steam system 3. electric furnace flue gas double-work medium according to claim 2 exchanges heat, which is characterized in that institute It further includes oxygen-eliminating device (9), the hydrospace outlet of oxygen-eliminating device (9) to state electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system By the second steam/water circulating decline pipeline (12) respectively with the entrance of first water-cooling structure, second water-cooling structure entrance and The entrance of the third water-cooling structure connects, and the air space entrance of oxygen-eliminating device (9) passes through the second steam/water circulating riser culverts (13) point It is not connect with the outlet of first water-cooling structure, the outlet of second water-cooling structure and the outlet of the third water-cooling structure.
- The combined-circulation superheated steam system 4. electric furnace flue gas double-work medium according to claim 2 exchanges heat, which is characterized in that vapour Wrap (10) second outlet by the second steam/water circulating decline pipeline (12) respectively with the entrance of first water-cooling structure, this second The entrance of water-cooling structure is connected with the entrance of the third water-cooling structure, and the second entrance of drum (10) passes through on the second steam/water circulating Riser road (13) goes out with the outlet of first water-cooling structure, the outlet of second water-cooling structure and the third water-cooling structure respectively Mouth connection.
- The combined-circulation superheated steam system 5. electric furnace flue gas double-work medium according to claim 2 exchanges heat, which is characterized in that the One flue (4) is bend pipe flue, and the first flue (4) contains the epimere flue (41) connected by flange (43) and hypomere flue (42), the arrival end of the first flue (4) is towards horizontal direction, and downward, the first flue (4) go out for the outlet end of the first flue (4) Head cover (51) grafting at mouth end and combustion settling chamber (5).
- The combined-circulation superheated steam system 6. electric furnace flue gas double-work medium according to claim 5 exchanges heat, which is characterized in that institute State electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system further include slider mechanism, the slider mechanism contain sliding sleeve (1), One end sealing shroud of trolley (2) and Mechanical Driven component (3), sliding sleeve (1) is set to outside the arrival end of the first flue (4), sliding The other end sealing shroud for covering (1) is set to outside the outlet end of furnace lid watercooling elbow, and trolley (2) can support sliding sleeve (1), Mechanical Driven component (3) can drive sliding sleeve (1) and trolley (2) to move back and forth in the horizontal direction.
- The combined-circulation superheated steam system 7. electric furnace flue gas double-work medium according to claim 6 exchanges heat, which is characterized in that sliding It is tubular structure to cover (1), and the barrel of sliding sleeve (1) is tube-to-tube construction, and first water-cooling structure is located at the upper of the first flue (4) The upper end of the lower end and hypomere flue (42) of section flue (41), combustion settling chamber (5) are cube structure, combustion settling chamber (5) Interior to be equipped with connection the first flue (4) and the second flue (6) cavity, side peripheral wall (52) is laying fireproof bricks.
- The combined-circulation superheated steam system 8. electric furnace flue gas double-work medium according to claim 1 exchanges heat, which is characterized in that the The section of two flues (6) is round or rectangular, and the position of the arrival end of the second flue (6) is less than the outlet end of the second flue (6) Position, between the outlet end and the entrance of waste heat boiler (8) of the second flue (6) be equipped with compensator (7).
- The combined-circulation superheated steam system 9. electric furnace flue gas double-work medium according to claim 8 exchanges heat, which is characterized in thatSecond flue (6) is adiabatic flue, and the second flue (6) contains the insulating layer and steel pipe set gradually from inside to outside；Alternatively, the second flue (6) is gasification cooling flue.
- The combined-circulation superheated steam system 10. electric furnace flue gas double-work medium according to claim 1 exchanges heat, which is characterized in that Heat exchanger (171) is set in storage tank (17), and multiple vapor-water heat exchangers vertically arranged are equipped in waste heat boiler (8) (20), at least two vapor-water heat exchangers (20) are located at the top of heat storage exchanger (16), at least one vapor-water heat exchanger (20) position Lower section in heat storage exchanger (16), the operating temperature of heat-conducting medium is 300 DEG C~600 DEG C in heat storage exchanger (16), adjacent Two vapor-water heat exchangers (20) between be equipped with compensator, also be provided with mending between vapor-water heat exchanger (20) and heat storage exchanger (16) Device is repaid, electric preheater is additionally provided in storage tank (17).
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| CN201810505161.4A CN108645226B (en) | 2018-05-24 | 2018-05-24 | Electric stove flue gas double working medium heat exchange composite cycle superheated steam system |
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| CN201810505161.4A CN108645226B (en) | 2018-05-24 | 2018-05-24 | Electric stove flue gas double working medium heat exchange composite cycle superheated steam system |
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| US20220275936A1 (en) * | 2021-02-26 | 2022-09-01 | Outokumpu Stainless USA. LLC | Cooling system for steel production system |
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| CN108645226B (en) | 2023-12-29 |
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