CN105180664B - The residual heat using device and its residual-heat utilization method of a kind of interval electric furnace arrangement for producing steel - Google Patents
The residual heat using device and its residual-heat utilization method of a kind of interval electric furnace arrangement for producing steel Download PDFInfo
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- CN105180664B CN105180664B CN201510419548.4A CN201510419548A CN105180664B CN 105180664 B CN105180664 B CN 105180664B CN 201510419548 A CN201510419548 A CN 201510419548A CN 105180664 B CN105180664 B CN 105180664B
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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
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Abstract
The present invention discloses the residual heat using device and its residual-heat utilization method of a kind of interval electric furnace arrangement for producing steel, the residual heat using device of interval electric furnace arrangement for producing steel includes interval electric furnace arrangement for producing steel system, water charging system, interval vapour system, Boiler Steam make-up system and steam-using system, and interval vapour system is respectively connected with interval electric furnace arrangement for producing steel system and water charging system；Boiler Steam make-up system is connected with water charging system；Steam-using system is connected by the first steam control valve with interval vapour system and is connected by the second steam control valve with Boiler Steam make-up system.Wherein, interval vapour system and Boiler Steam make-up system provide steam to steam-using system respectively, and the control by the first steam control valve and the second steam control valve keeps being supplied to the steam flow summation of steam-using system constant, successfully realizes the utilization to interval electric furnace arrangement for producing steel waste heat.
Description
Technical field
It is to be related to a kind of waste heat profit of interval electric furnace arrangement for producing steel specifically the present invention relates to a kind of residual heat using device
Use device.The invention further relates to the residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel.
Background technology
The need for large-scale electric furnace arrangement for producing steel is due to Environmental-protecting dust-removing, the high-temperature high concentration CO flue gases in stove need to be arranged from furnace roof hole
Go out, substantial amounts of physical thermal and chemical heat are contained in flue gas, applied in continuous steelmaking.
But at home and abroad Heavy Machinery Plant, because electric-arc furnace steelmaking takes intermittent mode to be produced, flue gas is discontinuously discharged
Thermal source cannot be supplied continuously, and the waste heat in flue gas not yet succeeds utilization.
The content of the invention
When being made steel the invention aims to solve large-scale electric furnace arrangement for producing steel interval, the high-temperature high concentration CO discontinuously discharged in stove
A kind of Utilizing question of a large amount of physical thermals and chemical heat in flue gas, there is provided residual heat using device of interval electric furnace arrangement for producing steel, realizes
Produce to interval electric furnace arrangement for producing steel the utilization of waste heat.
The present invention also provides a kind of residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel.
To achieve these goals, the residual heat using device of interval electric furnace arrangement for producing steel of the invention includes：
Interval electric furnace arrangement for producing steel system and water charging system；
Interval vapour system, is respectively connected with the interval electric furnace arrangement for producing steel system and water charging system；
Boiler Steam make-up system, is connected with the water charging system；And
Steam-using system, is connected by the first steam control valve with the interval vapour system and is mended with the Boiler Steam
It is connected by the second steam control valve to system；
Wherein, the interval vapour system and the Boiler Steam make-up system provide steaming to the steam-using system respectively
Vapour, and control by first steam control valve and second steam control valve keeps being supplied to the steam-using system
Steam flow summation is constant.
The residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, the Boiler Steam make-up system includes hot standby
Boiler Steam feeds subsystem, and second steam control valve includes the second hot standby steam control valve, the hot standby Boiler Steam
Supply subsystem is connected with the steam-using system by the described second hot standby steam control valve.
The residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, it is described also including hot standby unidirectional steam control valve
Hot standby Boiler Steam supply subsystem is connected with the interval vapour system by the hot standby unidirectional steam control valve.
The residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, the Boiler Steam make-up system also includes normal
Standby Boiler Steam feeds subsystem, and second steam control valve also includes the second standing steam control valve, the standing boiler
Steam supply subsystem is connected with the steam-using system by the described second standing steam control valve.
The residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, it is described also including standing unidirectional steam control valve
Standing Boiler Steam supply subsystem is connected with the interval vapour system by the standing unidirectional steam control valve.
The residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, the interval vapour system includes low-pressure steam
Subsystem and middle pressure steam subsystem, the low-pressure steam subsystem include low-pressure steam evaporator, medium pressure steam subsystem
System includes middle pressure steam evaporator, and the water charging system includes being sequentially connected oxygen-eliminating device, deoxygenation water tank and the make-up water preheater for connecing,
The make-up water preheater feeds system with the low-pressure steam evaporator, medium pressure steam vaporizer, the Boiler Steam respectively
System is connected.
The residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, the low-pressure steam subsystem also includes low pressure
Steamdrum, the low-pressure steam bag is connected with the make-up water preheater and oxygen-eliminating device respectively.
The residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, medium pressure steam subsystem also includes middle pressure
Steamdrum and storage heater, medium pressure steamdrum are connected with medium pressure steam vaporizer and the storage heater respectively, described
Storage heater is connected with the steam-using system by first steam control valve.
The residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, the steam-using system includes a point drum, uses decatize
Steam control valve and vapor jet vacuum pump, the steam control valve be connected to the steamdrum and the vapor jet vacuum pump it
Between, first steam control valve and second steam control valve are connected with described point of drum respectively.
The residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, the steam-using system also includes and described point of vapour
The water heating gas utilization unit that bag is connected.
The residual-heat utilization method of the residual heat using device of interval electric furnace arrangement for producing steel of the invention comprises the following steps：
S100, the heat generation the of the intermittent high temperatures flue gas that interval vapour system is produced using interval electric furnace arrangement for producing steel system
One steam, Boiler Steam make-up system generates the second steam using fuel combustion；
S200, controls the first steam control valve, makes the flow of the first steam that interval vapour system provides to steam-using system
From being reduced to zero to gradual change at full capacity；The second steam control valve is controlled, makes what Boiler Steam make-up system was provided to steam-using system
The flow synchronization gradual change of the second steam is increased at full capacity from zero, to realize while the utilization to interval electric furnace arrangement for producing steel waste heat
Guarantee is supplied to the steam total flow of steam-using system constant；
S300, while the step S100 and S200 is carried out, water charging system is to interval vapour system and Boiler Steam
Make-up system provides make-up water.
The residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, in the step S100
Also comprise the following steps：Boiler Steam make-up system is set to hot standby Boiler Steam supply subsystem, hot standby Boiler Steam supply
Subsystem provides the second steam to steam-using system.
The residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, in the step S100
Also comprise the following steps：Hot standby Boiler Steam supply subsystem feeds subsystem and interval vapour system by hot standby Boiler Steam
Between set a hot standby unidirectional steam control valve carry out preliminary filling steam to interval vapour system.
The residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, in the step S100
Also comprise the following steps：Boiler Steam make-up system is set to hot standby Boiler Steam supply subsystem and the supply of standing Boiler Steam
Subsystem, hot standby Boiler Steam supply subsystem is common with standing Boiler Steam supply subsystem to provide the second steaming to steam-using system
Vapour.
The residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, in the step S100
Also comprise the following steps：Standing Boiler Steam supply subsystem feeds subsystem and interval vapour system by standing Boiler Steam
Between set a standing unidirectional steam control valve carry out preliminary filling steam to interval vapour system.
The residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, in the step S300
Also comprise the following steps：Interval vapour system is set to middle pressure steam subsystem and low-pressure steam subsystem, prepared by water charging system
Softened water simultaneously meet low-pressure steam subsystem, middle pressure steam subsystem, hot standby Boiler Steam supply subsystem and standing pot
Stove steam feeds subsystem to feeding the requirement of water.
The residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, in the step S300
Also comprise the following steps：The low-pressure steam of low-pressure steam subsystem generation meets low-pressure steam subsystem, middle pressure steam simultaneously
The requirement of system, hot standby Boiler Steam supply subsystem and standing Boiler Steam supply subsystem to feed water temperature.
The residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, the step S200 is also
Comprise the following steps：Boiler Steam make-up system and interval vapour system share one point of drum.
The residual-heat utilization method of the residual heat using device of above-mentioned interval electric furnace arrangement for producing steel, wherein, the step S100 is also
Comprise the following steps：The fuel that Boiler Steam make-up system is used is fuel gas, fuel oil or fire coal.
Beneficial functional of the invention is that the present invention is in continuous steelmaking electric arc furnaces smoke and waste steam boiler steam production system
On basis, then Boiler Steam make-up system is set up, and reverse gradual change constant flow in parallel is carried out to this two-way steam and automatically controlled,
In case steam-using system is when electric arc furnaces interval is made steel, system of being steamed to waste heat boiler carries out the supply of steam until taking and generation in real time
It, with realize in interval electric furnace arrangement for producing steel stove row's high-temperature high concentration CO fume afterheats utilization.
Below in conjunction with the drawings and specific embodiments, the present invention will be described in detail, but not as a limitation of the invention.
Brief description of the drawings
Fig. 1 is first embodiment of the invention interval electric furnace arrangement for producing steel waste heat boiler+gas fired-boiler coproduction steam cycle flow
Sketch；
Fig. 2 is first embodiment of the invention interval electric furnace arrangement for producing steel waste heat boiler+gas fired-boiler coproduction steam cycle system
Schematic diagram；
Fig. 3 is second embodiment of the invention interval electric furnace arrangement for producing steel waste heat boiler+gas fired-boiler coproduction steam cycle flow
Sketch；
Fig. 4 is third embodiment of the invention interval electric furnace arrangement for producing steel waste heat boiler+gas fired-boiler coproduction steam cycle flow
Sketch；
The step of Fig. 5 is the residual-heat utilization method of interval electric furnace arrangement for producing steel of the invention is schemed.
Wherein, reference
100 interval electric furnace arrangement for producing steel systems
101 interval electric furnace arrangement for producing steel
102 smoke settlement ponds
103 air exhausters
104 sack cleaners
105 chimneys
200 water charging systems
201 de-mineralized water sources
202 oxygen-eliminating devices
203 deoxygenation water tanks
204 make-up water preheaters
300 low-pressure steam subsystems
301 low-pressure steam evaporators
302 low-pressure steam bags
400 middle pressure steam subsystems
401 middle pressure steam evaporators
402 middle pressure steam bags
403 storage heaters
500 hot standby Boiler Steam supply subsystems
600 standing Boiler Steam supply subsystems
700 steam-using systems
701 points of drums
702 steam control valves
703 vapor jet vacuum pumps
702 ＇ steam control valves
703 ＇ vapor jet vacuum pumps
702 ＂ steam control valves
703 ＂ vapor jet vacuums
704 other use vapour point
810 first steam control valves
820 second steam control valves
821 second hot standby steam control valves
822 second standing steam control valves
830 hot standby unidirectional steam control valves
840 standing unidirectional steam control valves
Specific embodiment
Technical solution of the present invention is described in detail with specific embodiment below in conjunction with the accompanying drawings, to be further understood that
The purpose of the present invention, scheme and effect, but it is not intended as the limitation of scope of the appended claims of the present invention.
The residual heat using device of interval electric furnace arrangement for producing steel of the invention is in continuous steelmaking electric arc furnaces smoke and waste steam boiler steam
On the basis of production system, then the gas fired-boiler steam production system in hot standby state is set up, and this two-way steam is entered
Row reverse gradual change constant flow in parallel is automatically controlled, in case steam-using system is when electric arc furnaces interval is made steel, waste heat boiler is steamed is
System carries out the supply of steam until replace in real time, with realize in interval electric furnace arrangement for producing steel stove row's high-temperature high concentration CO cigarettes
The utilization of gas waste heat.
As depicted in figs. 1 and 2, the residual heat using device of interval electric furnace arrangement for producing steel of the invention includes interval electric furnace arrangement for producing steel
System 100, water charging system 200, interval vapour system, Boiler Steam make-up system and steam-using system 700.Interval vapour system with
Interval electric furnace arrangement for producing steel system 100 is connected, and interval vapour system and Boiler Steam make-up system respectively with water charging system 200
It is connected, steam-using system 700 is connected with interval vapour system by the first steam control valve 810, and is fed with Boiler Steam
System is connected by the second steam control valve 820.
Water charging system 200 provides make-up water to interval vapour system and Boiler Steam make-up system respectively, and interval makes steel electricity
The intermittent discharge high-temperature high concentration CO flue gases of arc furnace system 100, interval vapour system is using the interval of interval electric furnace arrangement for producing steel system 100
Discharge high-temperature high concentration CO flue gases generate the first steam, and Boiler Steam make-up system generates the second steam using fuel combustion, with
Respectively steam is provided to steam-using system 700.Wherein, by the control of the first steam control valve 810 and the second steam control valve 820
The steam flow summation that holding interval vapour system and Boiler Steam make-up system are commonly provided to steam-using system 700 is constant, with
Reach effective utilization that high-temperature high concentration CO flue gases are discharged to interval electric furnace arrangement for producing steel system 100.
Above-mentioned fuel can be various fuel gas, various fuel oil, various fire coals.
Specifically, as illustrated, interval electric furnace arrangement for producing steel system 100 of the invention includes interval electric furnace arrangement for producing steel 101, cigarette
Gas settling tank 102, air exhauster 103, sack cleaner 104 and chimney 105.Interval electric furnace arrangement for producing steel 101 and smoke settlement pond 102
It is connected, air exhauster 103, sack cleaner 104 and chimney 105 are sequentially connected, and interval vapour system is connected to smoke settlement pond 102
And air exhauster 103 between.The high-temperature high concentration CO flue gases excluded in the stove of interval electric furnace arrangement for producing steel 101, enter in fume sedimentation chamber 102
Row burning generation high-temp waste gas, high-temp waste gas pass through interval vapour system, then through air exhauster 103, sack cleaner 104, chimney
105 enter air with less than national emission concentration standard.
Water charging system 200 includes being sequentially connected the de-mineralized water source 201, oxygen-eliminating device 202, deoxygenation water tank 203 and the moisturizing that connect pre-
Hot device 204.Interval vapour system includes low-pressure steam subsystem 300 and middle pressure steam subsystem 400.Low-pressure steam subsystem
300 include the low-pressure steam evaporator 301 and low-pressure steam bag 302 that interconnect.Middle pressure steam subsystem 400 includes phase successively
The middle pressure steam evaporator 401 of connection, middle pressure steam bag 402 and storage heater 403.Steam-using system 700 includes a point drum 701, uses
Decatize steam control valve 701 and vapor jet vacuum pump 703, are connected to point drum 701 and steam spray with decatize steam control valve 702
Between vavuum pump 703.In embodiment shown in Fig. 1, Boiler Steam make-up system includes that hot standby Boiler Steam feeds subsystem 500
Subsystem 600 is fed with standing Boiler Steam.
Wherein, smoke settlement pond 102 is connected with middle pressure steam evaporator 401, and middle pressure steam evaporator 401 steams with low pressure
Steam vapo(u)rizer 301 is connected, and low-pressure steam evaporator 301 is connected with air exhauster 103, i.e., high-temp waste gas successively pass through middle pressure steam
Evaporator 401 and low-pressure steam evaporator 301, then arranged with less than country through air exhauster 103, sack cleaner 104, chimney 105
Put concentration standard and enter air.
Make-up water preheater 204 is mended with middle pressure steam evaporator 401, low-pressure steam evaporator 301, hot standby Boiler Steam respectively
It is connected with standing Boiler Steam supply subsystem 600 to subsystem 500.Wherein, the softened water that prepared by de-mineralized water source 201, warp
After the deoxygenation of oxygen-eliminating device 202, into deoxygenation water tank 203, then by make-up water preheater 204 with meet respectively low-pressure steam evaporator 301,
Middle pressure steam evaporator 401, hot standby Boiler Steam supply subsystem 500 and standing Boiler Steam feed the combustion gas of subsystem 600
Supply requirement of the boiler to water.
Wherein, low-pressure steam bag 302 is respectively connected with make-up water preheater 204, oxygen-eliminating device 202.By the institute of water charging system 200
The softened water of offer, the high-temp waste gas that interval electric furnace arrangement for producing steel 101 is provided carry out heat exchange in low-pressure steam evaporator 301
Generation low-pressure steam, provides heat, to reach low pressure to oxygen-eliminating device 202 and make-up water preheater 204 respectively through low-pressure steam bag 302
Steam vaporizer 301, middle pressure steam evaporator 401, hot standby Boiler Steam supply subsystem 500 and standing Boiler Steam supply
Supply requirement of the gas fired-boiler of system 600 to coolant-temperature gage.
The softened water provided by water charging system 200, the high-temp waste gas that interval electric furnace arrangement for producing steel 101 is provided, in middle pressure
Steam vaporizer 401 carries out heat exchange generation middle pressure steam, and storage heater 403 is entered through middle pressure steam bag 402, and storage heater 403 leads to
Cross the first steam control valve 810 to be connected with a point drum 701 for steam-using system 700, required with vapour with according to steam-using system 700
Steam is provided.
The gas fired-boiler of hot standby Boiler Steam supply subsystem 500 is in hot standby state in parallel, the second steam control valve 820
Including the second hot standby steam control valve 821, hot standby Boiler Steam supply subsystem 500 passes through the second hot standby steam control valve 821
It is connected with a point drum 701 for steam-using system 700, the second steam produced by hot standby Boiler Steam supply subsystem 500 passes through
Second hot standby steam control valve 821 provides steam by the supply requirement of steam-using system 700.
Reverse gradual change constant flow in parallel is taken to middle pressure steam subsystem 400 and hot standby Boiler Steam supply subsystem 500
Automatically control, respectively by the first steam control valve 810 and the second hot standby steam control valve 821, steamed to steam-using system 700
The supply and supply of vapour.It is on the premise of keeping steam flow constant, first in that reverse gradual change constant flow in parallel is automatically controlled
Pressure steam subsystem 400 from being reduced to zero to gradual change at full capacity, then by the synchronous gradual change of hot standby Boiler Steam supply subsystem 500 from
Zero mode for increasing at full capacity carries out confession and the benefit of steam, to realize the utilization to the waste heat of interval electric furnace arrangement for producing steel 101.
Separately, the storage heater of the middle pressure steam subsystem 400 of hot standby Boiler Steam supply subsystem 500 and interval vapour system
403 are connected by hot standby unidirectional steam control valve 830.Hot standby Boiler Steam 500 producing steams of supply subsystem are by hot standby
To the preliminary filling steam of storage heater 403, the middle pressure steam that such interval electric furnace arrangement for producing steel 101 is produced can be with for unidirectional steam control valve 830
Produce with to improve the utilization rate of waste heat.
The gas fired-boiler of standing Boiler Steam supply subsystem 600 is in standing state, and the second steam control valve 820 is also wrapped
Include the second standing steam control valve 822, standing Boiler Steam supply subsystem 600 by the second standing steam control valve 822 with
A point drum 701 for steam-using system 700 is connected.Standing Boiler Steam supply subsystem 600 feeds subsystem with hot standby Boiler Steam
System 500 is used cooperatively, for the more steel-making enterprise of vapour point.
As shown in figure 3, the middle pressure steam subsystem 400 of standing Boiler Steam supply subsystem 600 and interval vapour system
Storage heater 403 be connected by standing unidirectional steam control valve 840.Standing Boiler Steam supply subsystem 600 can with it is hot standby
Boiler Steam supply subsystem 500 is interchangeable and is used alternatingly, to increase the flexibility of production.
As shown in figure 4, not setting standing gas fired-boiler steam supply subsystem in the present embodiment, only it is provided with hot standby boiler and steams
Hot repair to subsystem 500, for the less steel-making enterprise of vapour point.
In the present invention, point drum 701 is the waste heat boiler of interval vapour system and the gas-fired boiler of Boiler Steam make-up system
Stove is shared.
Steam control valve 702,702 ＇, 703 ＂ are adjusted to steam flow, to meet vapor jet vacuum pump respectively
703rd, the requirement of 703 ＇, 703 ＂ to steam flow.Additionally, also steam pressure is adjusted, so that the steam for being located at distant place sprays
Penetrate regulation of the vavuum pump to steam pressure.Wherein, vapor jet vacuum pump 703,703 ＇, 703 ＂ can leave one it is alone or two
Use simultaneously.
Other are that the water being connected with minute drum 701 heats gas utilization unit with vapour point 704, for bath water, boiling water etc.
Heating.
As shown in figure 5, the residual-heat utilization method of the residual heat using device of interval electric furnace arrangement for producing steel of the invention, including it is as follows
Step：
S100, the heat generation the of the intermittent high temperatures flue gas that interval vapour system is produced using interval electric furnace arrangement for producing steel system
One steam, Boiler Steam make-up system generates the second steam using fuel combustion；
S200, controls the first steam control valve, makes the flow of the first steam that interval vapour system provides to steam-using system
From being reduced to zero to gradual change at full capacity；The second steam control valve is controlled, makes what Boiler Steam make-up system was provided to steam-using system
The flow synchronization gradual change of the second steam is increased at full capacity from zero, to realize while the utilization to interval electric furnace arrangement for producing steel waste heat
Guarantee is supplied to the steam total flow of steam-using system constant；
S300, while step S100 and S200 is carried out, water charging system feeds to interval vapour system and Boiler Steam
System provides make-up water.
Wherein, also comprise the following steps in step S100：
Boiler Steam make-up system is set to hot standby Boiler Steam supply subsystem 500, and hot standby Boiler Steam feeds subsystem
System 500 provides the second steam to steam-using system 700.
Hot standby Boiler Steam supply subsystem 500 feeds subsystem 500 and interval vapour system by hot standby Boiler Steam
Middle pressure steam subsystem 400 storage heater 403 between set hot standby unidirectional steam control valve 830 enter to interval vapour system
Row preliminary filling steam.
Boiler Steam make-up system is set to hot standby Boiler Steam supply subsystem 500 and standing Boiler Steam supply subsystem
System 600, hot standby Boiler Steam supply subsystem 500 and standing Boiler Steam supply subsystem 600 are carried to steam-using system 700 jointly
For the second steam.
Standing Boiler Steam supply subsystem 600 feeds subsystem 600 and interval vapour system by standing Boiler Steam
Middle pressure steam subsystem 400 storage heater 403 between set standing unidirectional steam control valve 840 enter to interval vapour system
Row preliminary filling steam.Hot standby Boiler Steam supply subsystem 500 can be interchangeable with standing Boiler Steam supply subsystem 600 and replace
Using ground preliminary filling steam is carried out to storage heater 403.
Softened water prepared by water charging system 200 meets low-pressure steam subsystem 300, middle pressure steam subsystem 400, heat simultaneously
Standby Boiler Steam feeds the 300 pairs of requirements of supply water of subsystem 500 and standing Boiler Steam supply subsystem.
The low-pressure steam of the generation of low-pressure steam subsystem 300 meets low-pressure steam subsystem 300, middle pressure steam subsystem simultaneously
The requirement of system 400, hot standby Boiler Steam supply subsystem 500 and standing Boiler Steam supply subsystem 600 to feed water temperature.
Certainly, the present invention can also have other various embodiments, ripe in the case of without departing substantially from spirit of the invention and its essence
Know those skilled in the art and work as and various corresponding changes and deformation, but these corresponding changes and change can be made according to the present invention
Shape should all belong to the protection domain of appended claims of the invention.
Claims (19)
1. a kind of residual heat using device of interval electric furnace arrangement for producing steel, it is characterised in that including：
Interval electric furnace arrangement for producing steel system and water charging system；
Interval vapour system, is respectively connected with the interval electric furnace arrangement for producing steel system and water charging system；
Boiler Steam make-up system, is connected with the water charging system；And
Steam-using system, being connected by the first steam control valve with the interval vapour system and being fed with the Boiler Steam is
System is connected by the second steam control valve；
Wherein, the interval vapour system and the Boiler Steam make-up system provide steam to the steam-using system respectively, and
Keep being supplied to the steam of the steam-using system by the control of first steam control valve and second steam control valve
Flow summation is constant.
2. the residual heat using device of interval electric furnace arrangement for producing steel according to claim 1, it is characterised in that the Boiler Steam
Make-up system includes that hot standby Boiler Steam feeds subsystem, and second steam control valve includes the second hot standby steam control valve,
The hot standby Boiler Steam supply subsystem is connected with the steam-using system by the described second hot standby steam control valve.
3. the residual heat using device of interval electric furnace arrangement for producing steel according to claim 2, it is characterised in that also including hot standby list
To steam control valve, the hot standby Boiler Steam supply subsystem passes through the hot standby unidirectional steam with the interval vapour system
Regulating valve is connected.
4. the residual heat using device of interval electric furnace arrangement for producing steel according to claim 2, it is characterised in that the Boiler Steam
Make-up system also includes that standing Boiler Steam feeds subsystem, and second steam control valve also includes the second standing steam regulation
Valve, the standing Boiler Steam supply subsystem is connected with the steam-using system by the described second standing steam control valve.
5. the residual heat using device of interval electric furnace arrangement for producing steel according to claim 4, it is characterised in that also including standing list
To steam control valve, the standing Boiler Steam supply subsystem passes through the standing unidirectional steam with the interval vapour system
Regulating valve is connected.
6. the residual heat using device of interval electric furnace arrangement for producing steel according to claim 1, it is characterised in that the interval steam
System includes low-pressure steam subsystem and middle pressure steam subsystem, and the low-pressure steam subsystem includes low-pressure steam evaporator,
Medium pressure steam subsystem includes middle pressure steam evaporator, and the water charging system includes being sequentially connected oxygen-eliminating device, the deoxygenation for connecing
Water tank and make-up water preheater, the make-up water preheater respectively with the low-pressure steam evaporator, medium pressure steam vaporizer, institute
Boiler Steam make-up system is stated to be connected.
7. the residual heat using device of interval electric furnace arrangement for producing steel according to claim 6, it is characterised in that the low-pressure steam
Subsystem also includes low-pressure steam bag, and the low-pressure steam bag is connected with the make-up water preheater and oxygen-eliminating device respectively.
8. the residual heat using device of interval electric furnace arrangement for producing steel according to claim 6, it is characterised in that medium pressure steam
Subsystem also include middle pressure steam bag and storage heater, medium pressure steamdrum respectively with medium pressure steam vaporizer and the storage
Hot device is connected, and the storage heater is connected with the steam-using system by first steam control valve.
9. the residual heat using device of interval electric furnace arrangement for producing steel according to claim 1, it is characterised in that the steam-using system
Including a point drum, with decatize steam control valve and vapor jet vacuum pump, the steam control valve is connected to the steamdrum and institute
State between vapor jet vacuum pump, first steam control valve and second steam control valve respectively with described point of drum phase
Connection.
10. the residual heat using device of interval electric furnace arrangement for producing steel according to claim 9, it is characterised in that described to use vapour system
System also includes the water heating gas utilization unit being connected with described point of drum.
The residual-heat utilization method of the residual heat using device of the interval electric furnace arrangement for producing steel described in 11. claims 1, it is characterised in that
Comprise the following steps：
S100, the heat generation first of the intermittent high temperatures flue gas that interval vapour system is produced using interval electric furnace arrangement for producing steel system steams
Vapour, Boiler Steam make-up system generates the second steam using fuel combustion；
S200, controls the first steam control valve, makes the flow of the first steam that interval vapour system provides to steam-using system from expiring
Load is reduced to zero to gradual change；The second steam control valve is controlled, make that Boiler Steam make-up system is provided to steam-using system second
The flow synchronization gradual change of steam is increased at full capacity from zero, to realize ensureing while the utilization to interval electric furnace arrangement for producing steel waste heat
It is supplied to the steam total flow of steam-using system constant；
S300, while the step S100 and S200 is carried out, water charging system feeds to interval vapour system and Boiler Steam
System provides make-up water.
The residual-heat utilization method of the residual heat using device of 12. interval electric furnace arrangement for producing steel according to claim 11, its feature
It is also to comprise the following steps in the step S100：Boiler Steam make-up system is set to hot standby Boiler Steam supply subsystem
System, hot standby Boiler Steam supply subsystem provides the second steam to steam-using system.
The residual-heat utilization method of the residual heat using device of 13. interval electric furnace arrangement for producing steel according to claim 12, its feature
It is also to comprise the following steps in the step S100：Hot standby Boiler Steam supply subsystem is fed by hot standby Boiler Steam
The hot standby unidirectional steam control valve set between subsystem and interval vapour system carries out preliminary filling steam to interval vapour system.
The residual-heat utilization method of the residual heat using device of 14. interval electric furnace arrangement for producing steel according to claim 11, its feature
It is also to comprise the following steps in the step S100：Boiler Steam make-up system is set to hot standby Boiler Steam supply subsystem
System and standing Boiler Steam feed subsystem, and hot standby Boiler Steam supply subsystem is common with standing Boiler Steam supply subsystem
The second steam is provided to steam-using system.
The residual-heat utilization method of the residual heat using device of 15. interval electric furnace arrangement for producing steel according to claim 14, its feature
It is also to comprise the following steps in the step S100：Standing Boiler Steam supply subsystem is fed by standing Boiler Steam
The standing unidirectional steam control valve set between subsystem and interval vapour system carries out preliminary filling steam to interval vapour system.
The residual-heat utilization method of the residual heat using device of 16. interval electric furnace arrangement for producing steel according to claim 14, its feature
It is also to comprise the following steps in the step S300：Interval vapour system is set to middle pressure steam subsystem and low-pressure steam
Subsystem, softened water prepared by water charging system meets low-pressure steam subsystem, middle pressure steam subsystem, hot standby Boiler Steam simultaneously
The requirement of supply subsystem and standing Boiler Steam supply subsystem to supply water.
The residual-heat utilization method of the residual heat using device of 17. interval electric furnace arrangement for producing steel according to claim 16, its feature
It is also to comprise the following steps in the step S300：The low-pressure steam of low-pressure steam subsystem generation meets low pressure steaming simultaneously
Vapour subsystem, middle pressure steam subsystem, hot standby Boiler Steam supply subsystem and standing Boiler Steam supply subsystem are to supply
The requirement of coolant-temperature gage.
The residual-heat utilization method of the residual heat using device of 18. interval electric furnace arrangement for producing steel according to claim 11, its feature
It is that the step S200 also comprises the following steps：Boiler Steam make-up system and interval vapour system share one point of drum.
The residual-heat utilization method of the residual heat using device of 19. interval electric furnace arrangement for producing steel according to claim 11, its feature
It is that the step S100 also comprises the following steps：The fuel that Boiler Steam make-up system is used be fuel gas, fuel oil or
It is coal-fired.
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| US20100319348A1 (en) * | 2009-05-26 | 2010-12-23 | Worleyparsons Group, Inc. | Waste heat recovery system |
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