CN203452860U - Electrical power generating system comprehensively utilizing waste heat of smoke of ferroalloy submerged arc furnace and casting process - Google Patents

Electrical power generating system comprehensively utilizing waste heat of smoke of ferroalloy submerged arc furnace and casting process Download PDF

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Publication number
CN203452860U
CN203452860U CN201320448100.1U CN201320448100U CN203452860U CN 203452860 U CN203452860 U CN 203452860U CN 201320448100 U CN201320448100 U CN 201320448100U CN 203452860 U CN203452860 U CN 203452860U
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China
Prior art keywords
waste heat
boiler
smoke
arc furnace
submerged arc
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Expired - Lifetime
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CN201320448100.1U
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Chinese (zh)
Inventor
赵宏彬
刘亚雷
宋纪元
侯宾才
方明
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NANJING KAISHENG KAINENG ENVIRONMENTAL ENERGY SOURCES CO Ltd
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NANJING KAISHENG KAINENG ENVIRONMENTAL ENERGY SOURCES CO Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P10/00Technologies related to metal processing
    • Y02P10/25Process efficiency
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02PCLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00Climate change mitigation technologies for sector-wide applications
    • Y02P80/10Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

Abstract

The utility model provides an electrical power generating system comprehensively utilizing waste heat of smoke of a ferroalloy submerged arc furnace and a casting process. The electrical power generating system comprehensively utilizing the waste heat of the smoke of the ferroalloy submerged arc furnace and the casting process comprises a semi-closed ferroalloy submerged arc furnace smoke waste heat utilization system, a casting workshop liquid iron sensible heat utilization system, a steam turbine electrical power generating system and an auxiliary system. The high-temperature smoke of the semi-closed ferroalloy submerged arc furnace enters a waste heat boiler, passes through a superheater, an evaporator and a public coal economizer in sequence, then is fed into a bag type dust collector through an induced draft fan to carry out dust extraction, and finally is discharged through a chimney intensively, wherein a single-pressure thermal system is adopted by the waste heat boiler. The sensible heat in the casting process is recycled to generate saturated steam, the saturated steam is fed into the superheater to carry out superheating together, superheating steam amount is increased, and therefore electric energy production is increased. The electrical power generating system comprehensively utilizing the waste heat of the smoke of the ferroalloy submerged arc furnace and the casting process utilizes the waste heat to the maximum extent to achieve the purpose of energy conservation and emission reduction without influencing normal working of the submerged arc furnace.

Description

In The Sub-mergedfurnace of The Ferroalloys flue gas and casting cycle residual heat integrative utilize power generation system
Technical field
The utility model relates to sensible heat comprehensive reutilization power generation system in a kind of In The Sub-mergedfurnace of The Ferroalloys flue gas and casting cycle, belongs to ferroalloy works' cogeneration technology field.
Background technique
The contained heat energy of waste gas that reduction by ferrosilicon electric furnace is discharged is equivalent to input 40%~50% of electric furnace net quantity of heat.Along with everybody the progressively attention to " energy-saving and emission-reduction ", although part ferrosilicon mineral hot furnace has been equipped with power generation system with residual heat of fume, still have quite a few heat not to be fully used.As everyone knows, in molten iron casting cycle, its temperature is often higher than 100~200 ℃ of ferrosilicon 75 fusing points (1300 ℃), and when ferrosilicon ratio is 0.7498/0.2368, ferrosilicon 75 enthalpies are (193.91+0.8404t) kJ/kg, and establishing casting temperature is 1400 ℃, Δ H 1400 ℃=1370.47KJ/Kg, when temperature drops to 25 ℃ of normal temperature, release heat is 1155.55kJ/kg.Output is pressed 2t/h, and release heat is 2311100kJ/h.This part heat is considerable as can be seen here.
Chinese patent " a kind of mine heated furnace flue-gas waste-heat generating system " (patent No.: disclose 200920135043.5) and utilized mine heated furnace flue-gas waste-heat generating system, it adopts two pressure exhaust heat boilers and filling condensing steam turbine to generate electricity.High pressure drum produces main steam pushing turbine, and low-pressure drum produces filling and sends into steam turbine.This system is not utilized the heat producing in casting cycle, causes energy to utilize insufficient.
Summary of the invention
The utility model object is, for current operation be only the heat that has reclaimed flue gas at most of mineral heating furnace flue waste heat recovery generating system of building, and heat in casting cycle is not often utilized and wastes, therefore sensible heat comprehensive reutilization power generation system in a kind of In The Sub-mergedfurnace of The Ferroalloys flue gas and casting cycle has been proposed.
For achieving the above object, system of the present utility model adopts following technological scheme:
In The Sub-mergedfurnace of The Ferroalloys flue gas and casting cycle residual heat integrative utilize power generation system, comprise that exhaust-heat boiler flue gas utilizes system, casting cycle cement sensible heat recovery system, turbine generating system and auxiliary system, exhaust-heat boiler flue gas utilizes system to comprise that an exhaust heat boiler is for reclaiming half airtight ferrosilicon mineral hot furnace afterbody high temperature section fume afterheat, the smoke inlet of described exhaust heat boiler is connected by airduct with half airtight ferrosilicon mineral hot furnace afterbody high temperature section flue, the smoke outlet of described exhaust heat boiler is connected with sack cleaner by induced draught fan, the outlet of described sack cleaner is connected with the entrance of main exhauster, the outlet of described main exhauster and diffusing chimney UNICOM,
Described casting cycle sensible heat recycling system, comprises fan housing, ingot mould and coil heat exchanger, and fan housing and ingot mould form closed space, and pressure gauge and thermometer are housed on fan housing, blower and described closed space UNICOM; Coil heat exchanger is for reclaiming the high temperature air of casting cycle, and described coil heat exchanger is connected with induced draft fan outlet, induced draft fan entrance and described closed space UNICOM; Described coil heat exchanger is connected with drum and forms closed-loop path, and described heat exchanger drum is connected with thermal accumulator by the first automatic regulating valve, unidirectional section time valve, and described thermal accumulator is connected with gas-distributing cylinder by the second automatic regulating valve;
Public economizer exit Fen San road in described exhaust heat boiler is connected with boiler-steam dome, thermal accumulator, heat exchanger drum respectively, described vaporizer and boiler-steam dome are connected to form closed-loop path, described boiler-steam dome saturated vapour outlet conduit is connected with gas-distributing cylinder, described gas-distributing cylinder is connected with superheater entrance by the 3rd automatic regulating valve, described superheater outlet is connected with steam turbine, and described steam turbine is connected with generator;
Described auxiliary system comprises tower cooler, vapour condenser, condensate pump, cooling water circulation water pump, described vacuum dust cather and associated conduit, wherein said tower cooler is connected with vapour condenser by cooling water circulation water pump and forms closed-loop path, and described condenser condensed water outlet is connected with vacuum dust cather by condensate pump.
The high-temperature flue gas of half airtight ferrosilicon mineral hot furnace carries out heat exchange through airduct introducing exhaust heat boiler and superheater, vaporizer, public economizer, and consequent saturated vapour enters in gas-distributing cylinder; After entering ingot mould, molten iron carries out air blast by blower, when air pressure and temperature are taken away by induced draught fan to coil heat exchanger and carried out heat exchange to opening at once switch after setting value, and then carry out the air blast work that so goes round and begins again, change thermogenetic saturated vapour and send in thermal accumulator, then sent in gas-distributing cylinder by thermal accumulator; In gas-distributing cylinder, gather saturated vapour that boiler-steam dome and thermal accumulator produce and after the overheated superheated vapor that becomes to meet operating mode of the superheater of exhaust heat boiler, deliver to the main inlet throttle-stop valve of steam turbine, Steam Actuation steam turbine does work and drives after generator generating, exhaust steam is condensed into water through vapour condenser, by condensate pump, delivered to after vacuum dust cather deoxygenation again, the public economizer that is pumped to exhaust heat boiler by boiler feed water heats, feedwater after heating is divided into three tunnels, one road is delivered to boiler-steam dome ,Yi road and is delivered to heat exchanger drum ,Yi road and deliver to thermal accumulator, forms a complete circulation loop.
The utility model takes full advantage of the residual heat resources in mineral hot furnace production process, and the molten iron sensible heat in casting workshop is fully recycled to (this part heat all slatterns at present), and the energy consumption ,Wei enterprise having reduced in mineral hot furnace production process has created benefit.
Accompanying drawing explanation
Fig. 1 is that routine only reclaims mine heated furnace flue-gas waste-heat generating system.
Fig. 2 is that In The Sub-mergedfurnace of The Ferroalloys flue gas of the present utility model and casting cycle residual heat integrative utilize power generation system.In figure except the word of having indicated, 1-exhaust heat boiler; 2-superheater; 3-vaporizer; The public economizer of 4-; 5-boiler-steam dome; 6-gas-distributing cylinder; 7-automatic regulating valve; 8-blower; 9-pressure gauge; 10-thermometer; 11-fan housing; 12-ingot mould; 13-induced draught fan; 14-coil heat exchanger; 15-heat exchanger drum; 16-one way stop peturn valve; 17-automatic regulating valve; 18-thermal accumulator; 19-automatic regulating valve; 20-gate valve; 21-feed water pump; 22-vacuum dust cather; 23-condensate pump; 24-vapour condenser; 25-steam turbine; 26-generator; 27-cooling circulating water pump; 28-tower cooler; 29-sack cleaner; 30-induced draught fan; 31-main exhauster; 32-half airtight ferrosilicon mineral hot furnace; 33-concentrates diffusing chimney.
Embodiment
Below in conjunction with drawings and Examples, be described further.
As shown in Figure 2, exhaust heat boiler 1 is for reclaiming half airtight ferrosilicon mineral hot furnace 32 afterbody high temperature section fume afterheats, its smoke inlet is connected by airduct with half airtight ferrosilicon mineral hot furnace 32 afterbody high temperature section flues, the smoke outlet of boiler is connected with sack cleaner 29 by induced draught fan 30, the outlet of sack cleaner 29 is connected with the entrance of main exhauster 31, the outlet of main exhauster 31 and diffusing chimney 33 UNICOMs.
Utilize the sensible heat saturated vapour system processed of casting cycle, comprise that coil heat exchanger 14 is for reclaiming the high temperature air of casting cycle, coil heat exchanger 14 is connected with induced draft fan 13 outlets, coil heat exchanger 14 is connected and forms closed-loop path with drum 15, heat exchanger drum 15 is connected with thermal accumulator 18 by automatic regulating valve 17, one way stop peturn valve 16, and described thermal accumulator 18 is connected with gas-distributing cylinder 6 by automatic regulating valve 19.
Exhaust heat boiler 1 is distributed as superheater 2, vaporizer 3, public economizer 4 from top to bottom successively, public economizer 4 entrances are connected with vacuum dust cather 22 outlets by feed water pump 21, public economizer 4 outlet Fen San roads are connected with boiler-steam dome 5, thermal accumulator 18, heat exchanger drum 15 respectively, vaporizer 3 is connected to form closed-loop path with boiler-steam dome 5, boiler-steam dome 5 saturated vapour outlet conduits are connected with gas-distributing cylinder 6, gas-distributing cylinder 6 is connected with superheater 2 entrances by automatic regulating valve 7, superheater 2 outlets are connected with steam turbine 25, and steam turbine 25 is connected with generator 26.
Auxiliary system comprises tower cooler 28, vapour condenser 24, condensate pump 23, cooling water circulation water pump 27, vacuum dust cather 22 and associated conduit, wherein tower cooler 28 is connected and forms closed-loop path with vapour condenser 24 by cooling water circulation water pump 27, vapour condenser 24 water of condensation outlets are connected with vacuum dust cather 22 by condensate pump 23, and vacuum dust cather 22 is connected with public economizer 4 entrances by feed water pump 21.
Concrete technology flow process:
Exhaust-heat boiler flue gas recycling system, its high-temperature flue gas is introduced exhaust heat boiler 1 through airduct and is carried out heat exchange with superheater 2, vaporizer 3, public economizer 4, and consequent saturated vapour enters in gas-distributing cylinder 6;
Sensible heat recycling system in casting cycle, by fan housing 11, ingot mould 12, form closed space, and pressure gauge 9, thermometer 10 be housed, after entering ingot mould 12, molten iron carries out air blast by blower 8, when air pressure and temperature are taken away to coil heat exchanger 14 and carried out heat exchange by induced draught fan 13 to opening at once switch after setting value, and then carry out the air blast work that so goes round and begins again, change thermogenetic saturated vapour and send in thermal accumulator 18, then sent in gas-distributing cylinder 6 by thermal accumulator 18;
In gas-distributing cylinder 6, gather saturated vapour that boiler-steam dome 5 and thermal accumulator 18 produce and after the overheated superheated vapor that becomes to meet operating mode of the superheater 2 of exhaust heat boiler 1, deliver to the main inlet throttle-stop valve of steam turbine 25, Steam Actuation steam turbine 25 does work and drives after generator 26 generatings, exhaust steam is condensed into water through vapour condenser 24, by condensate pump 23, delivered to after vacuum dust cather 22 deoxygenations again, by boiler feed pump 21, deliver to public economizer 4 heating of exhaust heat boiler 1, feedwater after heating is divided into three tunnels, boiler-steam dome 5 is delivered on one road, heat exchanger drum 15 is delivered on one road, thermal accumulator 18 is delivered on one road, form a complete circulation loop.
Any any modification of doing within spirit of the present utility model and principle, be equal to and replace and improvement etc., within all should being included in claim protection domain of the present utility model.

Claims (1)

1. In The Sub-mergedfurnace of The Ferroalloys flue gas and casting cycle residual heat integrative utilize power generation system, comprise that exhaust-heat boiler flue gas utilizes system, casting cycle cement sensible heat recovery system, turbine generating system and auxiliary system, exhaust-heat boiler flue gas utilizes system to comprise that an exhaust heat boiler (1) is for reclaiming half airtight ferrosilicon mineral hot furnace (32) afterbody high temperature section fume afterheat, the smoke inlet of described exhaust heat boiler (1) is connected by airduct with half airtight ferrosilicon mineral hot furnace (32) afterbody high temperature section flue, the smoke outlet of described exhaust heat boiler (1) is connected with sack cleaner (29) by induced draught fan (30), the outlet of described sack cleaner (29) is connected with the entrance of main exhauster (31), the outlet of described main exhauster (31) and diffusing chimney (33) UNICOM, it is characterized in that,
Described casting cycle sensible heat recycling system, comprise fan housing (11), ingot mould (12) and coil heat exchanger (14), fan housing (11) and ingot mould (12) form closed space, and pressure gauge (9) and thermometer (10) are housed, blower (8) and described closed space UNICOM on fan housing (11); Coil heat exchanger (14) is for reclaiming the high temperature air of casting cycle, and described coil heat exchanger (14) is connected with induced draft fan (13) outlet, induced draft fan (13) entrance and described closed space UNICOM; Described coil heat exchanger (14) is connected and forms closed-loop path with drum (15), described heat exchanger drum (15) is connected with thermal accumulator (18) by the first automatic regulating valve (17), unidirectional section time valve (16), and described thermal accumulator (18) is connected with gas-distributing cylinder (6) by the second automatic regulating valve (19);
Public economizer (4) outlet Fen San road in described exhaust heat boiler (1) is connected with boiler-steam dome (5), thermal accumulator (18), heat exchanger drum (15) respectively, vaporizer (3) is connected to form closed-loop path with boiler-steam dome (5), described boiler-steam dome (5) saturated vapour outlet conduit is connected with gas-distributing cylinder (6), described gas-distributing cylinder (6) is connected with superheater (2) entrance by the 3rd automatic regulating valve (7), described superheater (2) outlet is connected with steam turbine (25), and described steam turbine (25) is connected with generator (26);
Described auxiliary system comprises tower cooler (28), vapour condenser (24), condensate pump (23), cooling water circulation water pump (27), vacuum dust cather (22) and associated conduit, wherein said tower cooler (28) is connected with vapour condenser (24) by cooling water circulation water pump (27) and forms closed-loop path, and the outlet of described vapour condenser (24) water of condensation is connected with vacuum dust cather (22) by condensate pump (23).
CN201320448100.1U 2013-07-25 2013-07-25 Electrical power generating system comprehensively utilizing waste heat of smoke of ferroalloy submerged arc furnace and casting process Expired - Lifetime CN203452860U (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344125A (en) * 2013-07-25 2013-10-09 南京凯盛开能环保能源有限公司 Power generation system with waste heat in casting process of submerged arc furnace comprehensively utilized
CN103900392A (en) * 2014-04-21 2014-07-02 中冶赛迪工程技术股份有限公司 Method and system for carrying out waste heat utilization, efficient filtration and unified purification on electric furnace flue gas
CN108591993A (en) * 2018-03-13 2018-09-28 中国能源建设集团广东省电力设计研究院有限公司 Emergency Cooling System and its control method for supercritical circulating fluidized bed boiler

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103344125A (en) * 2013-07-25 2013-10-09 南京凯盛开能环保能源有限公司 Power generation system with waste heat in casting process of submerged arc furnace comprehensively utilized
CN103900392A (en) * 2014-04-21 2014-07-02 中冶赛迪工程技术股份有限公司 Method and system for carrying out waste heat utilization, efficient filtration and unified purification on electric furnace flue gas
CN108591993A (en) * 2018-03-13 2018-09-28 中国能源建设集团广东省电力设计研究院有限公司 Emergency Cooling System and its control method for supercritical circulating fluidized bed boiler

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