CN203443379U - Over-saturated steam generating system for high-temperature residual-heat condensing turbine of smelting furnace - Google Patents

Over-saturated steam generating system for high-temperature residual-heat condensing turbine of smelting furnace Download PDF

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Publication number
CN203443379U
CN203443379U CN201320460627.6U CN201320460627U CN203443379U CN 203443379 U CN203443379 U CN 203443379U CN 201320460627 U CN201320460627 U CN 201320460627U CN 203443379 U CN203443379 U CN 203443379U
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steam
waste heat
accumulator
pressure
generator set
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陈少辉
刘红
刘宝兴
陈再
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Guidiankanneng Technology Co ltd
Guodiankangneng Technology Stock Co ltd
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BEIJING GUODIANKANGNENG TECHNOLOGY Co Ltd
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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
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

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  • Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
  • Engine Equipment That Uses Special Cycles (AREA)

Abstract

The utility model discloses an over-saturated steam generating system for a high-temperature residual-heat condensing turbine of a smelting furnace. In the generating system, a plurality of residual-heat boilers are adopted for generating steam used for driving a turbine generator set to generate power. The system further comprises a steam heat accumulator and a steam overheat station, wherein the steam heat accumulator is arranged behind the residual-heat boilers, and is used for adjusting the pressure of medium-pressure saturated steam generated in each residual-heat boiler; the steam overheat station is arranged between the steam heat accumulator and the turbine generator set, and is used for further heating the steam of which the pressure is adjusted by the steam heat accumulator, so that overheated steam is formed to drive the steam turbine generator set to generate power. The system is suitable for various non-ferrous smelting furnaces, including oxygen bottom blowing furnaces, blast furnaces, fuming furnaces, reflecting furnaces, side blowing furnaces and the like. According to the system, comprehensive treatment and utilization of residual-heat resources in an entire plant are realized, the power generating efficiency is increased, and the investment cost is lowered.

Description

Smelting furnace high-temperature residual heat condensing turbine supersaturated vapor electricity generation system
Technical field
The utility model relates to metallurgical technology, especially relates to the supersaturated vapor electricity generation system that smelting furnace utilizes fume afterheat.
Background technology
Non-ferrous metal smelting furnace is of a great variety at present, as oxygen bottom blown furnace, blast furnace, fuming furnace, reverberatory furnace and side-blown converter etc.These stoves itself consume a large amount of heat energy, produce a large amount of waste heats simultaneously.Exhaust gas temperature, all 1000 ℃ of left and right, is recovery waste heat, generally adopts waste heat boiler to reclaim the heat that high-temperature flue gas is taken away.Because a lot of nonferrous smelting equipment is periodic duty, flue-gas temperature and flow are existed and change large problem, for adopting waste heat boiler Mist heat recovering, exist thermal source thermic load unstable, the problem that generating set can not continous-stable work.This becomes insoluble problem in non-ferrous metal metallurgy industry waste heat recovery project.
Existing technical scheme mainly utilizes waste heat boiler to produce steam or hot water, and for heat supply in winter or domestic hot-water, at southern most area or northern area non-heating season, these thermals source just cannot utilize like this, have caused serious energy waste.
Because the equipment of non-ferrous metal industry is that periodic duty makes flue-gas temperature and changes in flow rate very large, for adopting existing cogeneration technology, limited by technological process, existence is because thermal source thermic load is unstable, cause steam to produce discontinuous and steam flow is unstable, steam turbine can not steady operation, cause generating set cisco unity malfunction, the difficulties such as the serious shortening of lifetime of system, make prior art be difficult to be applied to non-ferrous metal metallurgy industry.
Summary of the invention
The purpose of this utility model is to provide a non-ferrous metal metallurgy industry afterheat generating system, solves unstable, the discontinuous difficult problem of thermal source, has realized and has utilized steam turbine uninterruptable power generation.
In order to realize the purpose of this utility model, following technical scheme is proposed:
A high-temperature residual heat condensing turbine supersaturated vapor electricity generation system, described electricity generation system adopts a plurality of waste heat boilers to produce steam, and the generating of driving steam turbine generating set, is characterized in that, and described system also comprises:
Steam accumulator, after described steam accumulator is arranged on waste heat boiler, the middle pressure saturated vapor that each waste heat boiler is produced carries out pressure adjustment;
Steam superheating station, is arranged between steam accumulator and Turbo-generator Set, to adjust the steam of pressure through steam accumulator, further heats, and forms superheated steam and drives Turbo-generator Set generating.
Between described steam accumulator and waste heat boiler, be also provided with steam main, collect the steam that each waste heat boiler produces, be delivered to steam accumulator.
Described a plurality of waste heat boiler is middle pressure saturated vapor waste heat boiler, and its capacity is 9t/h～23 t/h; The steam of described steam main output is 3.82Mpa, 250 ℃; Steam pressure after described steam accumulator adjustment is 2.5Mpa, 224 ℃, after described overheated station heating, form 2.5Mpa, and the superheated steam of 400 ℃, described Turbo-generator Set is the Turbo-generator Set of 2 groups of 7.5MW.
Between described steam accumulator and waste heat boiler, be also provided with automatic regulating valve door V1, in order to keep boiler pressure constant; Between described steam accumulator and Turbo-generator Set, be provided with automatic regulating valve door V2, in order to keep Turbo-generator Set constant with steam pressure.
Described overheated station is coal-burning boiler, is used for saturated vapor out in steam accumulator to be heated to be superheated steam.
Native system is applicable to various non-ferrous metal smelting furnaces, comprises oxygen bottom blown furnace, blast furnace, fuming furnace, reverberatory furnace and side-blown converter etc., and native system has been realized the comprehensive regulation and the application of whole plant area residual heat resources, has improved generating efficiency, has reduced cost of investment.
Accompanying drawing explanation
The overall structure schematic diagram of Fig. 1 native system;
Fig. 2 steam accumulator structure arrangement schematic diagram.
The specific embodiment
For making the purpose of this utility model, technical scheme and advantage clearer, below in conjunction with the drawings and specific embodiments, the utility model is further described.
The comparatively intensive place of concrete scheme Shi plant area's smelting furnace of the present utility model, for every smelting furnace installs a waste heat boiler additional, produce the middle pressure saturated vapor of same pressure, after being pooled to steam main, the steam that many waste heat boilers are produced together enters steam accumulator, after steam accumulator is adjusted pressure, by overheated station, be heated to be superheated steam, then enter steam turbine acting and be converted into electric energy.
Fig. 1 is the overall structure of native system, mainly comprises: waste heat boiler, steam accumulator, steam superheating station, steam turbine power generation unit, softening water station, control room, pipe network system and other auxiliary equipment.As shown in Figure 1.After oxygen bottom blown furnace, blast furnace, fuming furnace, reverberatory furnace and side-blown converter stove, install middle pressure saturated vapor waste heat boiler additional, its capacity is not according to the difference of smelting furnace from 9t/h-23 t/h etc.; The steam producing is pooled to steam main, output 3.82Mpa, the steam of 250 ℃, through steam accumulator, adjusting pressure is 2.5Mpa, the steam of 224 ℃ heats by overheated station, forms 2.5Mpa, and the superheated steam of 400 ℃ drives the Turbo-generator Set generating of 2 groups of 7.5MW.The softening water station that the waste vapour that Turbo-generator Set is discharged sequentially forms through condenser, oxygen-eliminating device and condensate tank enters waste heat boiler again, completes thermodynamic cycle.
Fig. 2 is the structural representation of steam accumulator.Steam accumulator is arranged between steam main and steam superheating station, during each waste heat boiler is produced, presses saturated vapor to carry out pressure adjustment.When the evaporation capacity of each waste heat boiler is greater than Turbo-generator Set steam consumption, unnecessary steam enters storage heater, heating water storage (saturation water) wherein, and steam itself is also condensed in wherein, and the pressure in storage heater rises thereupon.When steam consumption is greater than the evaporation capacity of waste heat boiler, the water storage in storage heater (saturation water) seethes with excitement because of step-down, provides steam to keep boiler load constant.The whole course of work is controlled voluntarily by one group of automatic regulating valve door.Valve V1 is in order to keep boiler pressure constant, and valve V2 is in order to keep constant with steam pressure, and steam accumulator pressure changes between the two.Boiler pressure and larger with the pressure reduction between steam pressure, the savable heat of storage heater is also larger, and can select its volume by different situations.So not only solved the unsettled problem of thermal source, even and if indivedual of short duration blowing out of smelting furnace, also can not affect the operation of whole electricity generation system, steam accumulator guarantees that electricity generation system can steady in a long-term move.
Producing from waste heat boiler, pressure saturated vapor is heated to be superheated steam through overheated station, and described overheated station is in system, to increase a coal-burning boiler, is used for specially saturated vapor out in steam accumulator to be heated to be superheated steam.That is, by saturated vapor heating, make it pressure constant, temperature improves, and temperature, higher than saturation temperature corresponding under this pressure, forms superheat state.Pushing turbine rotates to drive generator work.Avoid the water droplet in steam to cause great damage to steam turbine; Avoid reducing the relative efficiency of steam turbine.
This afterheat generating system has well solved in non-ferrous metal metallurgy the discontinuous production of smelting equipment and the thermal source unsettled problem of loading, and has realized the continuous production of cogeneration, has not only improved production efficiency, has also extended service life of equipment.
Above-described specific embodiment; the purpose of this utility model, technical scheme and beneficial effect have been carried out to further detailed description; institute is understood that; the foregoing is only specific embodiment of the utility model; be not limited to the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in protection domain of the present utility model.

Claims (5)

1. a smelting furnace high-temperature residual heat condensing turbine supersaturated vapor electricity generation system, described electricity generation system adopts a plurality of waste heat boilers to produce steam, and the generating of driving steam turbine generating set, is characterized in that, and described system also comprises:
Steam accumulator, after described steam accumulator is arranged on waste heat boiler, the middle pressure saturated vapor that each waste heat boiler is produced carries out pressure adjustment;
Steam superheating station, is arranged between steam accumulator and Turbo-generator Set, to adjust the steam of pressure through steam accumulator, further heats, and forms superheated steam and drives Turbo-generator Set generating.
2. electricity generation system according to claim 1, is characterized in that, is also provided with steam main between described steam accumulator and waste heat boiler, collects the steam that each waste heat boiler produces, and is delivered to steam accumulator.
3. electricity generation system according to claim 2, is characterized in that, described a plurality of waste heat boilers are middle pressure saturated vapor waste heat boiler, and its capacity is 9t/h～23 t/h; The steam of described steam main output is 3.82Mpa, 250 ℃; Steam pressure after described steam accumulator adjustment is 2.5Mpa, 224 ℃, after described overheated station heating, form 2.5Mpa, and the superheated steam of 400 ℃, described Turbo-generator Set is the Turbo-generator Set of 2 groups of 7.5MW.
4. electricity generation system according to claim 3, is characterized in that, is also provided with automatic regulating valve door V1 between described steam accumulator and waste heat boiler, in order to keep boiler pressure constant; Between described steam accumulator and Turbo-generator Set, be provided with automatic regulating valve door V2, in order to keep Turbo-generator Set constant with steam pressure.
5. electricity generation system according to claim 4, is characterized in that, described overheated station is coal-burning boiler, is used for saturated vapor out in steam accumulator to be heated to be superheated steam.
CN201320460627.6U 2013-07-31 2013-07-31 Over-saturated steam generating system for high-temperature residual-heat condensing turbine of smelting furnace Expired - Lifetime CN203443379U (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104048286A (en) * 2014-06-25 2014-09-17 付红萍 Steam heat accumulator system
CN108534128A (en) * 2018-04-24 2018-09-14 邯郸钢铁集团有限责任公司 A kind of parameter regulation means of two kinds of vapour systems of iron and steel enterprise supply and recycling
CN108548429A (en) * 2018-04-16 2018-09-18 河南华东工控技术有限公司 A kind of industrial afterheat recovery utilizes control system
CN112629276A (en) * 2021-01-13 2021-04-09 易门铜业有限公司 Multi-grade waste heat gradient upgrading power generation system and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104048286A (en) * 2014-06-25 2014-09-17 付红萍 Steam heat accumulator system
CN108548429A (en) * 2018-04-16 2018-09-18 河南华东工控技术有限公司 A kind of industrial afterheat recovery utilizes control system
CN108534128A (en) * 2018-04-24 2018-09-14 邯郸钢铁集团有限责任公司 A kind of parameter regulation means of two kinds of vapour systems of iron and steel enterprise supply and recycling
CN112629276A (en) * 2021-01-13 2021-04-09 易门铜业有限公司 Multi-grade waste heat gradient upgrading power generation system and method

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