CN204612502U - A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming - Google Patents
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming Download PDFInfo
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- CN204612502U CN204612502U CN201420715757.4U CN201420715757U CN204612502U CN 204612502 U CN204612502 U CN 204612502U CN 201420715757 U CN201420715757 U CN 201420715757U CN 204612502 U CN204612502 U CN 204612502U
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- 238000009845 electric arc furnace steelmaking Methods 0.000 title claims abstract description 33
- 239000003517 fume Substances 0.000 title claims abstract description 32
- 230000005855 radiation Effects 0.000 claims abstract description 79
- 238000001816 cooling Methods 0.000 claims abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 47
- 239000002918 waste heat Substances 0.000 claims abstract description 45
- 238000010891 electric arc Methods 0.000 claims abstract description 39
- 238000003860 storage Methods 0.000 claims abstract description 20
- 238000009413 insulation Methods 0.000 claims abstract description 12
- 239000010410 layer Substances 0.000 claims description 23
- 239000007789 gas Substances 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 16
- 239000012528 membrane Substances 0.000 claims description 15
- 229910000831 Steel Inorganic materials 0.000 claims description 11
- 239000010959 steel Substances 0.000 claims description 11
- 239000010431 corundum Substances 0.000 claims description 8
- 229910052593 corundum Inorganic materials 0.000 claims description 8
- 239000011241 protective layer Substances 0.000 claims description 8
- 239000011449 brick Substances 0.000 claims description 5
- 230000008016 vaporization Effects 0.000 claims description 5
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 4
- 239000011819 refractory material Substances 0.000 claims description 4
- 238000009834 vaporization Methods 0.000 claims description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 abstract description 59
- 239000003546 flue gas Substances 0.000 abstract description 59
- 238000004519 manufacturing process Methods 0.000 abstract description 9
- 238000007599 discharging Methods 0.000 abstract description 2
- 239000000779 smoke Substances 0.000 abstract description 2
- 230000000087 stabilizing effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 11
- 230000008569 process Effects 0.000 description 11
- 239000000428 dust Substances 0.000 description 10
- 238000006392 deoxygenation reaction Methods 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 238000005516 engineering process Methods 0.000 description 4
- 238000004062 sedimentation Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 230000007613 environmental effect Effects 0.000 description 3
- 238000011084 recovery Methods 0.000 description 3
- 239000008234 soft water Substances 0.000 description 3
- 230000001502 supplementing effect Effects 0.000 description 3
- 238000007664 blowing Methods 0.000 description 2
- 239000003245 coal Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 239000010432 diamond Substances 0.000 description 2
- 229910003460 diamond Inorganic materials 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- BPQQTUXANYXVAA-UHFFFAOYSA-N Orthosilicate Chemical compound [O-][Si]([O-])([O-])[O-] BPQQTUXANYXVAA-UHFFFAOYSA-N 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 235000019504 cigarettes Nutrition 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000010410 dusting Methods 0.000 description 1
- 238000005338 heat storage Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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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
The utility model discloses a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming, it comprises movable flue, fixing flue, expansion chamber, waste heat boiler high-temperature flue, waste heat boiler, storage heater, movable flue and fixing flue band inner thermal insulation device, vaporize water cold emission Heat Room established by waste heat boiler, convection heat-exchange chamber etc., electric arc furnaces four hole flue gas is through movable flue, fixing flue, expansion chamber, then waste heat boiler is entered by waste heat boiler high-temperature flue after expansion chamber, high-temperature flue gas is in waste heat boiler and fin panel casing, radiation water-cooling screen, after evaporimeter and economizer heat exchange, the temperature of flue gas is significantly reduced, then steam generator system is discharged, discharge after dedusting, waste heat boiler absorbs heat and produces steam, after entering storage heater voltage stabilizing, becomes continuous steam, for production or generating.The utility model can fully reclaim electric arc furnaces flue gas heat, can reach more than 70% of electric arc furnaces institute smoke discharging heat.
Description
Technical field
The utility model relates to a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming, specifically can reclaim efficiently electric arc furnaces discharge the heat of high-temperature flue gas, reduce exhaust gas temperature to greatest extent, ensure cleaner safe operation, reduce dedusting power consumption, belong to the energy-conserving and environment-protective technical field that electric arc furnaces is produced.
Background technology
At present, in electric-arc furnace steelmaking production process, the temperature of the high-temperature flue gas of discharging is very high, generally at 1300 DEG C ~ 1600 DEG C, just can carry out dedusting after must first cooling.At present, electric furnace flue gas heat recovery mode is: movable water-cooling flue---fixing water-cooled flue---water-cooling sedimentation room---fixing water-cooled flue---heat pipe waste heat boiler.All there is shortcomings in above-mentioned way of recycling: 1, the water-band of movable water-cooling flue, fixing water-cooled flue and water-cooling sedimentation room has walked a large amount of heats; 2, heat pipe waste heat boiler only can bear 850 DEG C of flue-gas temperatures, therefore when flue-gas temperature is higher than 850 DEG C, need infiltrate cold wind in order to control cigarette temperature, cause the increase of exhaust smoke level like this, add flue gas loss.The heat pipe life-span of heat pipe waste heat boiler is shorter in addition.Current electric furnace flue gas waste heat recovery efficiency is lower than 50%.
Summary of the invention
Goal of the invention: in order to overcome the deficiencies in the prior art, provides a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming, can heat energy efficiently in recovered flue gas, and electric furnace flue gas waste heat recovery efficiency reaches more than 70%.And the safe operation requirement of dust pelletizing system can be met, improve efficiency of dust collection, improve the energy saving standard level of electric arc furnaces production technology.
Technical scheme: a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming of the present utility model, comprise the movable flue of electric arc furnaces, flue fixed by electric arc furnaces, expansion chamber, boiler high temperature flue, waste heat boiler, storage heater, oxygen-eliminating device, establish inner thermal insulation device inside described electric arc furnaces movable flue and fixing flue; Described waste heat boiler is water-tube boiler, if drum, water-cooled radiation heat transfer room, convection heat-exchange chamber; One end of described electric arc furnaces movable flue is connected with arc furnace cover four hole flue, and the other end is connected with one end of fixing flue, and fixing flue is connected with expansion chamber, establishes boiler high temperature flue between expansion chamber and waste heat boiler; One end of described waste heat boiler water-cooled radiation heat transfer room and boiler high temperature flue, the other end of water-cooled radiation heat transfer room is connected with convection heat-exchange chamber front end; The rear end of convection heat-exchange chamber is connected with the exit flue of waste heat boiler; The drum of described waste heat boiler is established outer for jet chimney, and jet chimney establishes storage heater to outer confession.
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming described in the utility model, preferred embodiment is establish heat-insulation layer and wearing layer inside movable flue and fixing flue.
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming described in the utility model, preferred embodiment is the heat-insulation layer material of movable flue and fixing flue is insulated pouring material, and the wearing layer material of described movable flue and fixing flue is corundum castable.
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming described in the utility model, preferred embodiment is that radiation water-cooling screen and fin panel casing are established in water-cooled radiation heat transfer indoor.
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming described in the utility model, preferred embodiment is that radiation water-cooling screen becomes screen formula by row's steel pipe each other by Plate Welding, described radiation water-cooling screen hangs and is installed in water-cooled radiation chamber, the upper end of described radiation water-cooling screen is connected with drum by pipeline, header, and the lower end of described radiation water-cooling screen is connected with drum by pipeline, header.
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming described in the utility model, preferred embodiment is that radiation water-cooling screen is made up of the parallel steel pipe of a row, described radiation water-cooling screen hangs and is installed in water-cooled radiation chamber, the upper end of described radiation water-cooling screen is connected with drum by pipeline, header, and the lower end of described radiation water-cooling screen is connected with drum by pipeline, header.
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming described in the utility model, preferred embodiment is that convection heat-exchange chamber establishes evaporimeter, high-temperature economizer and low-level (stack-gas) economizer, and described high-temperature economizer outlet is connected with drum by pipeline.Described high-temperature economizer import is connected with oxygen-eliminating device by pipeline, water pump.
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming described in the utility model, preferred embodiment is that ash exhauster is established in bottom, waste heat boiler water-cooled radiation heat transfer room; Ash exhauster is established in waste heat boiler convection heat-exchange chamber bottom.
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming described in the utility model, preferred embodiment is expansion chamber is adiabatic expansion chamber; Arch top established by described expansion chamber, and its internal layer adopts corundum material to build by laying bricks or stones; Described boiler high temperature flue is preferably adiabatic flue, and adiabatic flue internal layer is preferably built by laying bricks or stones with high alumina refractories.。
A kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming described in the utility model, described expansion chamber is preferably vaporization water-cooled expansion chamber; Expansion chamber water cooled membrane wall is established at the side wall of expansion chamber and top; The water inlet pipe of expansion chamber water cooled membrane wall is connected with expansion chamber forced circulation delivery side of pump by pipeline, and the water manifold that goes out of expansion chamber water cooled membrane wall is connected with drum by pipeline, and the water inlet of expansion chamber forced circulation water pump is connected with drum by pipeline, valve.。
Flue gas flow of the present utility model is 1300 ~ 1600 DEG C of high-temperature flue gas that electric arc furnaces is produced in process of production, fix flue by movable flue and electric arc furnaces and enter expansion chamber, the bulky grain dust in flue gas is removed in expansion chamber, then high-temperature flue gas enters the water-cooled radiation heat transfer room of waste heat boiler by boiler high temperature flue, , after high-temperature flue gas and radiation water-cooling screen and fin panel casing heat exchange, flue-gas temperature will decline to a great extent, usual flue-gas temperature is down to 600 ~ 800 DEG C, the volume of flue gas significantly reduces, flue gas flow rate also significantly reduces, large material dust in flue gas falls into radiation chamber ash bucket, carry out final dusting, then flue gas enters convection heat-exchange chamber, with evaporimeter, high-temperature economizer, after low-level (stack-gas) economizer heat exchange, discharged by boiler exhaust gas flue, after sending deduster dedusting, up to standard emptying, meet environmental requirement.
The utility model steam flow process is: after soft water supplementing water or steam turbine condensate water are heated by low-level (stack-gas) economizer, send into oxygen-eliminating device deoxygenation, water after deoxygenation is delivered to after high-temperature economizer heating through feed pump pressurization, send into drum, the water in drum absorbs flue gas heat by radiation water-cooling screen, fin panel casing and evaporimeter, produces steam, steam in drum is connected with storage heater for jet chimney by the outer of drum top, by storage heater, make the outer pressure stability for steam, meet and produce and life use.
The utility model compared with prior art has the following advantages:
The utility model has fully reclaimed the heat of electric arc furnaces high-temperature flue gas, there is the thermal efficiency high, the thermal efficiency reaches more than 70%, be applicable to all flue-gas temperatures, and overcome a waste heat boiler dust blocking difficult problem, not only system is simple, reliable, maintenance cost and operating cost low, and improve electric arc furnaces flue gas ash removal efficiency, reduce dust pelletizing system power consumption.
Accompanying drawing explanation
Fig. 1 is electric-arc furnace steelmaking fume afterheat efficient system for reclaiming schematic diagram (embodiment one) of the present utility model.
1, electric arc furnaces 2, bell 3, large petticoat pipe 4, movable flue 5, flue 6 fixed by electric arc furnaces, boiler high temperature flue 7, waste heat boiler 8, drum 9, current-sharing room 10, water-cooled radiation chamber 11, fin panel casing 12, outer for jet chimney 13, storage heater 14, oxygen-eliminating device 15, feed pump 16, low-level (stack-gas) economizer 17, the few coal device 18 of high temperature, evaporimeter 19, convection heat-exchange chamber 20, ash exhauster 21, ash bucket 22, radiation water-cooling screen 23, expansion chamber 24, boiler exhaust gas flue 25, deduster
Fig. 2 is the radiation water-cooling screen schematic diagram (embodiment two) of the utility model electric-arc furnace steelmaking fume afterheat efficient system for reclaiming.
1, electric arc furnaces 2, bell 3, large petticoat pipe 4, movable flue 5, flue 6 fixed by electric arc furnaces, boiler high temperature flue 7, waste heat boiler 8, drum 9, current-sharing room 10, water-cooled radiation chamber 11, fin panel casing 12, outer for jet chimney 13, storage heater 14, oxygen-eliminating device 15, feed pump 16, low-level (stack-gas) economizer 17, the few coal device 18 of high temperature, evaporimeter 19, convection heat-exchange chamber 20, ash exhauster 21, ash bucket 22, radiation water-cooling screen 23, expansion chamber 24, boiler exhaust gas flue 25, deduster 231, expansion chamber forced circulation pump 232, expansion chamber water cooled membrane wall
Fig. 3 is the radiation water-cooling screen schematic diagram (embodiment one) of the utility model electric-arc furnace steelmaking fume afterheat efficient system for reclaiming.
22, junction steel plate between radiation water-cooling screen 26, seamless steel pipe 27, steel pipe
Fig. 4 is the radiation water-cooling screen schematic diagram (embodiment two) of the utility model electric-arc furnace steelmaking fume afterheat efficient system for reclaiming.
22, reinforcement plate 30, pipe clamp between radiation water-cooling screen 28, seamless steel pipe 29, steel pipe
Fig. 5 is that the movable flue of the utility model electric-arc furnace steelmaking fume afterheat efficient system for reclaiming and the inner side of fixing flue are incubated and wearing layer schematic diagram
31, outer wall 32, heat-insulation layer 33, wearing layer
Detailed description of the invention
Below in conjunction with accompanying drawing, the utility model is further described.
Embodiment one:
As shown in Figure 1: a kind of electric-arc furnace steelmaking fume afterheat of the utility model efficient system for reclaiming, comprise the movable flue (4) of electric arc furnaces (1), flue (5) fixed by electric arc furnaces, expansion chamber (23), boiler high temperature flue (6), waste heat boiler (7), storage heater (13), oxygen-eliminating device (14); Install protective layer and the heat-insulation layer of Wear-resistant, high-temperature resistant in the inner side of movable flue (4) and fixing flue (5), protective layer material adopts diamond spar castable, and heat-insulation layer adopts insulated pouring material; Waste heat boiler is band radiation chamber water-tube boiler, if drum (8), water-cooled radiation heat transfer room (10), convection heat-exchange chamber (19); One end of electric arc furnaces movable flue (4) is connected with arc furnace cover four hole flue, and the other end is connected with the one end of fixing flue (5), and fixing flue (5) is connected with expansion chamber (23); Expansion chamber (23) is connected by high-temperature flue (6) one end with waste heat boiler (7) water-cooled radiation heat transfer room (10), and the other end of water-cooled radiation heat transfer room (10) is connected with convection heat-exchange chamber (19) front end; The rear end of convection heat-exchange chamber (19) is connected with the exit flue (24) of waste heat boiler (6); The drum (8) of waste heat boiler (7) is installed outer for jet chimney (12), outer for jet chimney (12) installation storage heater (13), the jet chimney leading to user installed by storage heater (13).
By dress radiation water-cooling screen (22) in water-cooled radiation heat transfer room (10), radiation water-cooling screen (22) becomes screen formula (see Fig. 3) by row's steel pipe each other by Plate Welding, radiation water-cooling screen (22) hangs and is installed in water-cooled radiation chamber, the upper end of radiation water-cooling screen (22) is connected with drum (8) by pipeline, header, the lower end of radiation water-cooling screen (22) is connected with drum (8) by pipeline, header, and radiation water-cooling screen has four pieces.
In convection heat-exchange chamber (19) by dress evaporimeter (18), high-temperature economizer (17) and low-level (stack-gas) economizer (16), high-temperature economizer (17) outlet is connected with drum (8) by pipeline, and high-temperature economizer (17) import is connected with oxygen-eliminating device (14) by pipeline, water pump.
Ash bucket (21) is installed, in ash bucket (21) bottom by dress ash exhauster (20) in the bottom of water-cooled radiation heat transfer room (10) and convection heat-exchange chamber (19).
Electric arc furnaces movable flue (4) and electric arc furnaces are fixed the two kinds of castables in flue (5) inner side and are poured into a mould (see Fig. 5), a kind of insulated pouring material (32), another kind is corundum castable (33), corundum castable be arranged on counter-fire side.
Expansion chamber (23) is adiabatic expansion chamber, adopts arch top, and its internal layer adopts high alumina refractories to build by laying bricks or stones, and intermediate layer is refractory insulating layer, and skin is concrete, installs silicate aluminum board at concrete and refractory insulating layer.
Flue gas process flow process of the present utility model is 1300 ~ 1600 DEG C of high-temperature flue gas that electric arc furnaces (1) is produced in process of production, fix flue (5) by movable flue (4) and electric arc furnaces and enter expansion chamber (23), the bulky grain dust in flue gas is removed in expansion chamber (23), high-temperature flue gas after sedimentation dedusting enters the water-cooled radiation chamber (10) of waste heat boiler (7) by boiler high temperature flue (6), after high-temperature flue gas and radiation water-cooling screen (22) and fin panel casing (11) heat exchange, flue-gas temperature declines to a great extent, usual flue-gas temperature is down to 600 ~ 800 DEG C, the volume of flue gas significantly reduces, flue gas flow rate also significantly reduces, bulky grain dust in flue gas falls into ash bucket, after secondary settlement dedusting, flue gas enters convection heat-exchange chamber (19), with evaporimeter (18), high-temperature economizer (17), after low-level (stack-gas) economizer (16) heat exchange, discharged by boiler exhaust gas flue (24), now the temperature of flue gas is less than 150 DEG C, after sending deduster dedusting, up to standard emptying, meet environmental requirement.
The utility model steam flow process is: soft water supplementing water or steam turbine condensate water are by after low-level (stack-gas) economizer (16) heating, send into oxygen-eliminating device (14) deoxygenation, water after deoxygenation is delivered to after high-temperature economizer (17) heating through feed pump (15) pressurization, send into drum (8), water in drum absorbs flue gas heat by radiation water-cooling screen (22), fin panel casing (11) and evaporimeter (18), produce steam, the steam in drum (8) sends into storage heater (13) and user by the outer of drum top for jet chimney (12).The production technology of electric arc furnaces is intermittence, when electric arc furnaces (1) stop blowing, when waste heat boiler (7) can not produce steam, now by storage heater (13) to user's steam supply, ensure the outer pressure stability for steam, satisfied production and life use.
Enforcement executes two:
As shown in Figure 2: a kind of electric-arc furnace steelmaking fume afterheat of the utility model efficient system for reclaiming, comprise the movable flue (4) of electric arc furnaces (1), flue (5) fixed by electric arc furnaces, expansion chamber (23), boiler high temperature flue (6), waste heat boiler (7), storage heater (13), oxygen-eliminating device (14); Install protective layer and the heat-insulation layer of Wear-resistant, high-temperature resistant in the inner side of movable flue (4) and fixing flue (5), protective layer material adopts diamond spar castable, and heat-insulation layer adopts insulated pouring material; Waste heat boiler is band radiation chamber water-tube boiler, if drum (8), water-cooled radiation heat transfer room (10), convection heat-exchange chamber (19); One end of electric arc furnaces movable flue (4) is connected with arc furnace cover four hole flue, and the other end is connected with the one end of fixing flue (5), and fixing flue (5) is connected with expansion chamber (23); Expansion chamber (23) is connected by high-temperature flue (6) one end with waste heat boiler (7) water-cooled radiation heat transfer room (10), and the other end of water-cooled radiation heat transfer room (10) is connected with convection heat-exchange chamber (19) front end; The rear end of convection heat-exchange chamber (19) is connected with the exit flue (24) of waste heat boiler (6); The drum (8) of waste heat boiler (7) is installed outer for jet chimney (12), outer for jet chimney (12) installation storage heater (13), the jet chimney leading to user installed by storage heater (13).
By dress radiation water-cooling screen (22) in water-cooled radiation heat transfer room (10), radiation water-cooling screen (22) connects into screen formula (see Fig. 4) by row's steel pipe each other by reinforcement plate (29) and pipe clamp (30), radiation water-cooling screen (22) hangs and is installed in water-cooled radiation chamber, the upper end of radiation water-cooling screen (22) is connected with drum (8) by pipeline, header, the lower end of radiation water-cooling screen (22) is connected with drum (8) by pipeline, header, and radiation water-cooling screen has four pieces.
In convection heat-exchange chamber (19) by dress evaporimeter (18), high-temperature economizer (17) and low-level (stack-gas) economizer (16), high-temperature economizer (17) outlet is connected with drum (8) by pipeline, and high-temperature economizer (17) import is connected with oxygen-eliminating device (14) by pipeline, water pump.
Ash bucket (21) is installed, in ash bucket (21) bottom by dress ash exhauster (20) in the bottom of water-cooled radiation heat transfer room (10) and convection heat-exchange chamber (19).
Electric arc furnaces movable flue (4) and electric arc furnaces are fixed the two kinds of castables in flue (5) inner side and are poured into a mould (see Fig. 5), a kind of insulated pouring material (32), another kind is corundum castable (33), corundum castable be arranged on counter-fire side.
Expansion chamber (23) is vaporization water-cooled expansion chamber, and the side wall of expansion chamber and top are expansion chamber water cooled membrane wall; Protective layer is installed in the bottom of expansion chamber water cooled membrane wall, and protective layer is the cast of high alumina material.The water inlet pipe of expansion chamber water cooled membrane wall (232) is connected by the outlet of pipeline with expansion chamber forced circulation pump (231), the water manifold that goes out of expansion chamber water cooled membrane wall (232) is connected with drum (8) by pipeline, and the water inlet of expansion chamber forced circulation water pump (231) is connected with drum (8) by pipeline, valve.
Flue gas process flow process of the present utility model is 1300 ~ 1600 DEG C of high-temperature flue gas that electric arc furnaces (1) is produced in process of production, fix flue (5) by movable flue (4) and electric arc furnaces and enter expansion chamber (23), high-temperature flue gas carries out heat exchange by expansion chamber water cooled membrane wall (232) and the water from drum in expansion chamber, release part heat, flue-gas temperature has certain decline, but flue-gas temperature is still higher, high-temperature flue gas removes the bulky grain dust in flue gas in expansion chamber (23), flue gas after sedimentation dedusting enters the water-cooled radiation chamber (10) of waste heat boiler (7) by boiler high temperature flue (6), after high-temperature flue gas and radiation water-cooling screen (22) and fin panel casing (11) heat exchange, flue-gas temperature declines to a great extent, usual flue-gas temperature is down to 600 ~ 800 DEG C, the volume of flue gas significantly reduces, flue gas flow rate also significantly reduces, bulky grain dust in flue gas falls into ash bucket, after secondary settlement dedusting, flue gas enters convection heat-exchange chamber (19), with evaporimeter (18), high-temperature economizer (17), after low-level (stack-gas) economizer (16) heat exchange, discharged by boiler exhaust gas flue (24), now the temperature of flue gas is less than 150 DEG C, after sending deduster dedusting, up to standard emptying, meet environmental requirement.
The utility model steam flow process is: soft water supplementing water or steam turbine condensate water are by after low-level (stack-gas) economizer (16) heating, send into oxygen-eliminating device (14) deoxygenation, water after deoxygenation is delivered to after high-temperature economizer (17) heating through feed pump (15) pressurization, send into drum (8), water in drum absorbs flue gas heat by radiation water-cooling screen (22), fin panel casing (11) and evaporimeter (18), produce steam, the steam in drum (8) sends into storage heater (13) and user by the outer of drum top for jet chimney (12).The steam flow process of vaporization water-cooled expansion chamber is that the pressurization of drum water is delivered to water cooled membrane wall (232) by pipeline by the forced circulation pump (231) of expansion chamber, in expansion chamber water cooled membrane wall (232), absorb heat become steam water interface, returned in drum by pipeline and let off steam, thus form forced cooling and circulating system.
The production technology of electric arc furnaces is intermittence, when electric arc furnaces (1) stop blowing, when waste heat boiler (7) can not produce steam, now by storage heater (13) to user's steam supply, the outer pressure stability for steam of guarantee, meets dirt and produces and life use.
The advantage of embodiment 1 is that adiabatic expansion chamber has certain heat storage capacity, has certain regulating action to the amplitude of variation of the temperature of flue gas, and reduce the fluctuation of quantity of steam, shortcoming is that expansion chamber is higher to refractory material requirement, and investment is large, and the expansion chamber life-span is short.
Embodiment 2 Vaporizing cooling expansion chamber, its advantage is small investment, and the expansion chamber life-span is long; Shortcoming to increase forced circulation system, and operating cost is higher.
The above is only preferably two kinds of embodiments of the present utility model; be noted that for those skilled in the art; under the prerequisite not departing from the utility model principle; can also make some improvements and modifications, these improvements and modifications also should be considered as protection domain of the present utility model.
Claims (10)
1. an electric-arc furnace steelmaking fume afterheat efficient system for reclaiming, comprise the movable flue (4) of electric arc furnaces (1), flue (5) fixed by electric arc furnaces, expansion chamber (23), boiler high temperature flue (6), waste heat boiler (7), storage heater (13), oxygen-eliminating device (14), it is characterized in that: described movable flue (4) and fixing flue (5) inner side establish inner thermal insulation device; Described waste heat boiler is water-tube boiler, if drum (8), water-cooled radiation heat transfer room (10), convection heat-exchange chamber (19); One end of described electric arc furnaces movable flue (4) is connected with arc furnace cover four hole flue, the other end is connected with the one end of fixing flue (5), fixing flue (5) is connected with expansion chamber (23), establishes boiler high temperature flue (6) between expansion chamber (23) and waste heat boiler (7); One end of described waste heat boiler water-cooled radiation heat transfer room (10) and boiler high temperature flue (6), the other end of water-cooled radiation heat transfer room (10) is connected with convection heat-exchange chamber (19) front end; The rear end of convection heat-exchange chamber (19) is connected with the exit flue (24) of waste heat boiler (6); The drum (8) of described radiation type waste heat boiler is established outer for jet chimney (12), and jet chimney (12) establishes storage heater (13) to outer confession.
2. a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming according to claim 1, is characterized in that: heat-insulation layer and wearing layer are established in described movable flue (4) and fixing flue (5) inner side.
3. a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming according to claim 2, it is characterized in that: described movable flue (4) and the heat-insulation layer material of fixing flue (5) are insulated pouring material, described movable flue (4) and the wearing layer material of fixing flue (5) are corundum castable.
4. a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming according to claim 1, is characterized in that: establish radiation water-cooling screen (22) and fin panel casing (11) in described water-cooled radiation heat transfer room (10).
5. a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming according to claim 2, it is characterized in that: described radiation water-cooling screen (22) becomes screen formula by row's steel pipe each other by Plate Welding, described radiation water-cooling screen (22) hangs and is installed in water-cooled radiation chamber, the upper end of described radiation water-cooling screen (22) is connected with drum (8) by pipeline, header, and the lower end of described radiation water-cooling screen (22) is connected with drum (8) by pipeline, header.
6. a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming according to claim 2, it is characterized in that: described radiation water-cooling screen (22) is made up of the parallel steel pipe of a row, described radiation water-cooling screen (22) hangs and is installed in water-cooled radiation chamber, the upper end of described radiation water-cooling screen (22) is connected with drum (8) by pipeline, header, and the lower end of described radiation water-cooling screen (22) is connected with drum (8) by pipeline, header.
7. a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming according to claim 1, it is characterized in that: described convection heat-exchange chamber (19) establishes evaporimeter (18), high-temperature economizer (17) and low-level (stack-gas) economizer (16), described high-temperature economizer (17) outlet is connected with drum (8) by pipeline.Described high-temperature economizer (17) import is connected with oxygen-eliminating device (14) by pipeline, water pump.
8. a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming according to claim 1, ash bucket (21) and ash exhauster (20) are established in described (10) bottom, waste heat boiler water-cooled radiation heat transfer room and convection heat-exchange chamber (19) bottom.
9. a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming according to claim 1, described expansion chamber (23) is adiabatic expansion chamber; Arch top established by described expansion chamber (23), and its internal layer adopts corundum material to build by laying bricks or stones; Described boiler high temperature flue is preferably adiabatic flue, and adiabatic flue internal layer is preferably built by laying bricks or stones with high alumina refractories.
10. a kind of electric-arc furnace steelmaking fume afterheat efficient system for reclaiming according to claim 1, described expansion chamber (23) is preferably vaporization water-cooled expansion chamber; Water cooled membrane wall (232) is established at the side wall of expansion chamber (23) and top; Protective layer is established in the bottom of expansion chamber water cooled membrane wall (232), and protective layer adopts castable cast.The water inlet pipe of expansion chamber water cooled membrane wall (232) is connected by the outlet of pipeline with expansion chamber forced circulation pump (231), the water manifold that goes out of expansion chamber water cooled membrane wall (232) is connected with drum (8) by pipeline, and the water inlet of expansion chamber forced circulation water pump (231) is connected with drum (8) by pipeline, valve.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359326A (en) * | 2014-11-21 | 2015-02-18 | 孙慕文 | System for efficiently recovering steel-making flue gas residual heat of electric-arc furnace |
| CN105135397A (en) * | 2015-08-27 | 2015-12-09 | 无锡华虹信息科技有限公司 | Waste smoke heat recovery system and application method thereof |
| CN106197042A (en) * | 2016-07-12 | 2016-12-07 | 武汉都市环保工程技术股份有限公司 | Rotary hearth furnace high-temperature high dust flue gas processing method |
| CN106247301A (en) * | 2016-10-10 | 2016-12-21 | 南京凯盛开能环保能源有限公司 | A kind of steel-smelting electric furnace fume afterheat efficient system for reclaiming and method |
| CN112044256A (en) * | 2020-08-17 | 2020-12-08 | 百色皓海碳素有限公司 | Method for deep desulfurization of electrolytic aluminum prebaked anode by calcination |
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2014
- 2014-11-21 CN CN201420715757.4U patent/CN204612502U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104359326A (en) * | 2014-11-21 | 2015-02-18 | 孙慕文 | System for efficiently recovering steel-making flue gas residual heat of electric-arc furnace |
| CN105135397A (en) * | 2015-08-27 | 2015-12-09 | 无锡华虹信息科技有限公司 | Waste smoke heat recovery system and application method thereof |
| CN105135397B (en) * | 2015-08-27 | 2017-08-29 | 宜兴市海纳环境工程有限公司 | A kind of flue gas heat recovery system and its application process |
| CN106197042A (en) * | 2016-07-12 | 2016-12-07 | 武汉都市环保工程技术股份有限公司 | Rotary hearth furnace high-temperature high dust flue gas processing method |
| CN106247301A (en) * | 2016-10-10 | 2016-12-21 | 南京凯盛开能环保能源有限公司 | A kind of steel-smelting electric furnace fume afterheat efficient system for reclaiming and method |
| CN112044256A (en) * | 2020-08-17 | 2020-12-08 | 百色皓海碳素有限公司 | Method for deep desulfurization of electrolytic aluminum prebaked anode by calcination |
| CN112044256B (en) * | 2020-08-17 | 2022-08-12 | 百色皓海碳素有限公司 | Method for deep desulfurization of electrolytic aluminum prebaked anode by calcination |
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