CN106839791A - Electric furnace flue gas waste heat Optimum utilization system based on many die pressing types - Google Patents
Electric furnace flue gas waste heat Optimum utilization system based on many die pressing types Download PDFInfo
- Publication number
- CN106839791A CN106839791A CN201710072153.0A CN201710072153A CN106839791A CN 106839791 A CN106839791 A CN 106839791A CN 201710072153 A CN201710072153 A CN 201710072153A CN 106839791 A CN106839791 A CN 106839791A
- Authority
- CN
- China
- Prior art keywords
- pressure
- waste heat
- flue
- gasification cooling
- drum
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01K—STEAM ENGINE PLANTS; STEAM ACCUMULATORS; ENGINE PLANTS NOT OTHERWISE PROVIDED FOR; ENGINES USING SPECIAL WORKING FLUIDS OR CYCLES
- F01K11/00—Plants characterised by the engines being structurally combined with boilers or condensers
- F01K11/02—Plants characterised by the engines being structurally combined with boilers or condensers the engines being turbines
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/02—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers
- F22B1/18—Methods of steam generation characterised by form of heating method by exploitation of the heat content of hot heat carriers the heat carrier being a hot gas, e.g. waste gas such as exhaust gas of internal-combustion engines
- F22B1/1892—Systems therefor not provided for in F22B1/1807 - F22B1/1861
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/004—Systems for reclaiming waste heat
- F27D2017/006—Systems for reclaiming waste heat using a boiler
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
Abstract
The present invention discloses a kind of electric furnace flue gas waste heat Optimum utilization system based on many die pressing types, the first gasification cooling flue, the second gasification cooling flue, combustion settling chamber, the 3rd gasification cooling flue, the waste heat boiler being sequentially communicated along flow of flue gas direction including the watercooling elbow exhanst gas outlet from above electric furnace, high pressure evaporator, high-pressure economizer, middle pressure evaporator in waste heat boiler, middle pressure economizer are sequentially arranged along flow of flue gas direction, first gasification cooling flue, the fire door of combustion settling chamber are cooled down using low pressure vapor system, produce low-pressure steam；Second gasification cooling flue, the bell of combustion settling chamber, waste heat boiler intermediate pressure section press boiler circuit in using, produce middle pressure steam；3rd gasification cooling flue, waste heat boiler high pressure section use high pressure boiler circuit, produce high steam, high pressure, output steam driving steam turbine work after storage heater, superheater of middle pressure drum.Boiler circuit is divided into three pressure systems by the present invention, realizes energy step Optimum utilization.
Description
Technical field
The present invention relates to the field of energy-saving technology of steel industry, more particularly to electric furnace flue gas waste heat based on many die pressing types is excellent
Change utilizes system.
Background technology
During electric furnace smelting, substantial amounts of high-temperature flue gas can be produced.These high-temperature flue gas have not only been taken away substantial amounts of
Heat energy, but also the operation of downstream cleaner can be influenceed, and then bring problem of environmental pollution.
In recent years, as iron and steel enterprise is to the pay attention to day by day of energy-saving and emission-reduction, how will be aobvious in steel making working procedure high-temperature flue gas
It is hot fully to reclaim, become " useless " into precious, have become steel-making enterprise increasingly concern.
At present, the waste heat recovery in engineering for electric furnace flue gas all uses single discard recuperation of heat mode, this waste heat recovery
Mode has a problem that that is, fume afterheat is utilized and is subject to a definite limitation, typically at 200 DEG C or so, however it remains larger profit
Use space.On the other hand, because flue-gas temperature is very high, and carbonated drink side temperature is relatively low, and the heat exchange of this super large temperature difference is caused
Excessive heat exchangeDamage, effective utility of laser power is had a greatly reduced quality.
In this regard, the present invention intends building a kind of electric furnace flue gas waste heat Optimum utilization system based on multiple pressure waste heat recovery pattern,
Fully reclaim the waste heat of electric furnace flue gas and rationally utilized, more considerable economic well-being of workers and staff can be produced, with important practicality
Meaning.
The content of the invention
The invention provides a kind of electric furnace flue gas waste heat Optimum utilization system based on many die pressing types, including from electric furnace 1
The first gasification cooling flue 3, the second Vaporizing cooling that the exhanst gas outlet of the watercooling elbow 2 of side is sequentially communicated along flow of flue gas direction
Flue 4, combustion settling chamber 5, the 3rd gasification cooling flue 6 and waste heat boiler 8, the high pressure evaporator 81, high pressure in waste heat boiler 8
Economizer 82, middle pressure evaporator 83, middle pressure economizer 84 sequentially arrange that the fume afterheat is using system along flow of flue gas direction
System is divided into low pressure vapor system, middle pressure boiler circuit, high pressure boiler circuit according to operating pressure difference again, wherein, the low pressure
Boiler circuit is used to cool down the fire door 51 of the first gasification cooling flue 3 and combustion settling chamber 5, and feedwater is supplied by low pressure drum 9, from
And produce low-pressure steam；And medium pressure boiler circuit be used for absorb the second gasification cooling flue, the bell 52 of combustion settling chamber,
The flue gas heat of the intermediate pressure section of waste heat boiler 8, supplies feedwater, so as to produce middle pressure steam by middle pressure drum 10；The high pressure vapour
Water system is used to cool down the 3rd gasification cooling flue 6, the high pressure section of waste heat boiler 8, feedwater is supplied by high pressure drum 11, so as to produce
Raw high steam, the high pressure drum 11, middle pressure drum 10 output steam respectively through after storage heater and superheater treatment with
Steam turbine 21 coordinates completion UTILIZATION OF VESIDUAL HEAT IN, wherein, first gasification cooling flue is using portable flue, second vaporization
Cooling stack and the 3rd gasification cooling flue use fixed flue, the gas approach end of first gasification cooling flue and institute
State the smoke outlet connection of watercooling elbow and have default gap, the smoke outlet of first gasification cooling flue and institute
The gas approach end connection of the second gasification cooling flue is stated, draw-gear is installed on first gasification cooling flue, this leads
Leading-in device can drive the first gasification cooling flue to be moved horizontally, and the smoke outlet of the first gasification cooling flue is then attached to
Moved horizontally on the gas approach end of second gasification cooling flue, so as to control the first gasification cooling flue and watercooling elbow
Between gap, and then adjust enter the first gasification cooling flue combustion air amount.
Preferably, the low pressure vapor system includes low pressure drum 9, low pressure recycle pump 12, and the low pressure drum 9 is by the
One down-comer 91 is connected with low pressure recycle pump 12, and the outlet pipeline of the low pressure recycle pump 12 branches into two-way, all the way with first
The water inlet connection of gasification cooling flue 3, another road connects with the apparatus for vapour-cooling water inlet of the fire door 51 of combustion settling chamber 5
Logical, the venthole of first gasification cooling flue 3, the apparatus for vapour-cooling of the fire door 51 of the combustion settling chamber 5 go out vapour
Mouth is connected with the rising mouth of pipe of the low pressure drum 9；Medium pressure boiler circuit include it is middle pressure feed pump 13, it is middle pressure drum 10,
Medium pressure cycle pump 15, the low pressure drum 9 is connected by the first outlet pipe 93 with middle pressure feed pump 13, medium pressure feed pump 13
Outlet pipeline connected with the water inlet of the middle pressure economizer 84 in the waste heat boiler 8, the water outlet of medium pressure economizer 84
Mouth is connected with the water inlet of medium pressure drum 10, and medium pressure drum 10 passes through the 3rd down-comer 101 and the waste heat
The water inlet of the middle pressure evaporator 83 in boiler 8 is connected, venthole and the medium pressure drum 10 of medium pressure evaporator 83
Rise mouth of pipe connection, form a natural convection loop；Medium pressure drum 10 is by the 4th down-comer 104 and Medium pressure cycle pump
15 connections, the outlet conduit of medium pressure circulating pump 15 is divided into two branch roads, enters with second gasification cooling flue 4 respectively
The water inlet connection of the apparatus for vapour-cooling of the bell 52 of the mouth of a river and combustion settling chamber 5, second gasification cooling flue 4
The venthole of the apparatus for vapour-cooling of the bell 52 of venthole and combustion settling chamber 5 is by pipeline and medium pressure drum 10
The connection of the rising mouth of pipe, form enclosed forced circulation loop；The high pressure boiler circuit includes high pressure water pump 14, high pressure drum
11st, high-pressure circulation pump 16, the low pressure drum 9 is connected by the second outlet pipe 92 with high pressure water pump 14, the high-pressure feed water
The delivery port of pump 14 connects with the water inlet of the high-pressure economizer 82 in the waste heat boiler 8, and the high-pressure economizer 82 goes out
The mouth of a river is connected with the water inlet of the high pressure drum 11, and the high pressure drum 11 is followed by the 4th down-comer 111 and the high pressure
Ring pump 16 is connected, and the outlet conduit of the high-pressure circulation pump 16 is connected with the water inlet of the 3rd gasification cooling flue 6, described
The venthole of the 3rd gasification cooling flue 6 is connected by pipeline with the rising mouth of pipe of the high pressure drum 11, is formed enclosed and is forced
Circulation loop, the water inlet that the high pressure drum 11 passes through the high pressure evaporator 81 in the 5th down-comer 112 and the waste heat boiler 8
Mouth is connected, and the venthole of the high pressure evaporator 81 is connected with the rising mouth of pipe of the high pressure drum 11, forms one and follows naturally
Loop back path.
Preferably, the venthole of the high pressure drum is connected with the air intake of the first storage heater, and medium pressure drum goes out
Steam ports is connected with the air intake of the second storage heater；The venthole of first storage heater and the first superheater crossed in heating flue
Air intake is connected, and the venthole of second storage heater is connected with the air intake for crossing the second superheater in heating flue；Described
The venthole of one superheater is connected with the main steam import of the steam turbine, venthole and the steamer of second superheater
The filling import of machine is connected.
Preferably, oxygen-eliminating device is also equipped with above the low pressure drum, low pressure drum doubles as deoxygenation water tank.
Preferably, the afterbody in waste heat boiler sets low pressure evaporator 85, and the low pressure drum 9 passes through the second down-comer 94
Water inlet with the low pressure evaporator 85 in the waste heat boiler 8 is connected, and the venthole of the low pressure evaporator 85 is low with described
Press the rising mouth of pipe connection of drum 9.
Preferably, in waste heat boiler, condensation water preheater is additionally provided with the fume side downstream of the low pressure evaporator,
For being preheated to the condensate that steam turbine comes.
Preferably, convection pass is provided between the 3rd gasification cooling flue and waste heat boiler, is set in the convection pass
Convection recuperator is equipped with, a branch road is separated on the outlet conduit of the high-pressure circulation pump and is changed with the convection current in the convection pass
The water inlet of hot device is connected, and the venthole of the convection recuperator in the convection pass is upper with the high pressure drum by pipeline
The mouth of pipe is risen to be connected.
Preferably, the blow-off line of the steam turbine is preheated with the condensate in condenser, condensate pump, waste heat boiler
The water inlet of the oxygen-eliminating device above device, low pressure drum is sequentially communicated along Water flow-path is condensed.
Brief description of the drawings
Embodiment is described by with reference to accompanying drawings below, features described above of the invention and technological merit will become
More understand and be readily appreciated that.
Fig. 1 is the signal of the electric furnace flue gas waste heat Optimum utilization system based on many die pressing types for representing the embodiment of the present invention
Figure.
Wherein, electric furnace 1, watercooling elbow 2, the first gasification cooling flue 3, the second gasification cooling flue 4, combustion settling chamber 5,
3rd gasification cooling flue 6, convection pass 7, waste heat boiler 8 (include high pressure evaporator 81, high-pressure economizer 82, middle pressure evaporation
Device 83, it is middle pressure economizer 84, low pressure evaporator 85, condense water preheater 86), low pressure drum 9, it is middle pressure drum 10, high pressure drum
11st, low pressure recycle pump 12, middle pressure feed pump 13, high pressure water pump 14, Medium pressure cycle pump 15, high-pressure circulation pump 16, the first accumulation of heat
Device 17, excessively the second storage heater 18, heating flue 19, the first superheater 20, the second superheater 21, steam turbine 22, condenser 23, condensation
Water pump 24, generator 25, the first down-comer 91, the second outlet pipe 92, the first outlet pipe 93, the second down-comer the 94, the 3rd decline
Pipe 101, pipeline 102, pipeline 103, the 4th down-comer 111, the 5th down-comer 112, pipeline 113, pipeline 114, pipeline 115, pipe
Road 116, pipeline 117, pipeline 118.
Specific embodiment
The electric furnace flue gas waste heat Optimum utilization system based on many die pressing types of the present invention described below with reference to the accompanying drawings
The embodiment of system.One of ordinary skill in the art will recognize, without departing from the spirit and scope of the present invention,
Described embodiment can be modified with a variety of modes or its combination.Therefore, accompanying drawing and description in itself
It is illustrative, is not intended to limit the scope of the claims.Additionally, in this manual, accompanying drawing is drawn not in scale
Go out, and identical reference represents identical part.It should be noted that high pressure of the present invention, middle pressure, low pressure be for
The pressure rating of distinguishing boiler circuit and the differentiation name that carries out are (such as：High steam, middle pressure steam, the pressure of low-pressure steam
Separately design is 3.83MPa, 1.6MPa, 0.5MPa), not absolute high pressure (such as 9.81MPa), definitely in pressure (such as 4.9MPa),
Absolute low pressure (such as 0.8MPa), also, the direction flowing as shown in arrow in figure of following carbonated drink flow direction.
The present invention provides a kind of electric furnace flue gas waste heat Optimum utilization system based on many die pressing types, including along flow of flue gas side
To the first gasification cooling flue 3, the second gasification cooling flue 4, combustion settling chamber 5, the 3rd gasification cooling flue 6 that are sequentially communicated
With waste heat boiler 8, wherein, the exhanst gas outlet of the watercooling elbow 2 of the smoke inlet of the first gasification cooling flue 3 and the top of electric furnace 1
Connection.Flue gas arrow A directions circulation along Fig. 1 is dynamic.High pressure evaporator 81, high-pressure economizer 82, middle pressure in waste heat boiler 8 steam
Hair device 83, middle pressure economizer 84 are sequentially arranged along flow of flue gas direction.Smoke waste heat utilization system again according to operating pressure not
It is same to be divided into low pressure vapor system, middle pressure boiler circuit, high pressure boiler circuit.Wherein, vaporized to be guaranteed at the first of temperature end
The quick cooling of cooling stack 3, and the fire door 51 in view of combustion settling chamber 5 activity, the first gasification cooling flue 3 and combustion
The cooling of fire door 51 for burning expansion chamber 5 uses low pressure vapor system, and its feedwater is provided by low pressure drum 9, so as to produce low-pressure steam.
The low pressure drum 9 is additionally provided with oxygen-eliminating device, and oxygen-eliminating device is installed on the top of low pressure drum 9, and such low pressure drum 9 can double as removing
Oxygen water tank.
And the bell 52 of the second gasification cooling flue 4, combustion settling chamber 5, the intermediate pressure section of waste heat boiler 8 press carbonated drink in using
System, its feedwater is supplied by middle pressure drum 10, so as to produce middle pressure steam.3rd gasification cooling flue 6, waste heat boiler 8
High pressure section then uses high pressure boiler circuit, and its feedwater is supplied by high pressure drum, so as to produce high steam.And by waste heat boiler
The flue gas for the treatment of then enters the dust removal installation in downstream along arrow B directions.High pressure drum 11, the steam difference of middle pressure drum 10 outlet
UTILIZATION OF VESIDUAL HEAT IN is completed by coordinating with steam turbine 22 after storage heater, superheater treatment.Specifically, the venthole of high pressure drum 11
Air intake with the first storage heater 17 is connected, and the venthole of middle pressure drum 10 is connected with the air intake of the second storage heater 18.First
The venthole of storage heater 17 is connected with the air intake for crossing the first superheater 20 in heating flue 19, the venthole of the second storage heater 18
It is connected with the air intake for crossing the second superheater 21 in heating flue 19.It can be the combustion furnace cigarette being separately provided to cross heating flue 19
High-temperature flue on road, or borrow or other smelting procedures of shared steel mill, such as heating furnace back-end ductwork, central cooler waste heat
Boiler flue etc..High-temperature flue gas entered in heating flue 19 along arrow C directions, and steam turbine 22 uses filling condensing turbine,
The venthole of the first superheater 20 is connected with the main steam import of steam turbine 22, venthole and the steam turbine 22 of the second superheater 20
Filling import be connected.Steam turbine 22 is used to drive generator 25 to generate electricity (certainly, it can also be used to drag other rotating machineries such as wind
Machine or water pump etc. do work).Drum in above high pressure drum, middle pressure drum, low pressure drum is also known as drum, be in waste heat boiler most
Important pressure parts.
High pressure boiler circuit, middle pressure carbonated drink system the following detailed description of the electric furnace flue gas afterheat utilizing system of many die pressing types
System, low pressure vapor system.From the exhanst gas outlet of the watercooling elbow 2 of the top of electric furnace 1 first has been sequentially communicated along flow of flue gas direction
Gasification cooling flue 3, the second gasification cooling flue 4, combustion settling chamber 5, the 3rd gasification cooling flue 6 and waste heat boiler 8.Waste heat
Include multiple evaporators and economizer in boiler 8 again, wherein, high pressure evaporator 81, high-pressure economizer 82, middle pressure evaporator 83,
Middle pressure economizer 84, low pressure evaporator 85 sequentially circulate along flue gas flow.Low pressure evaporator 85, the first gasification cooling flue 3
The low-pressure steam produced with the cooling device of the fire door 51 of combustion settling chamber 5 is all sent into low pressure drum 9, together as low pressure cooker
The deoxygenation steam of cylinder top oxygen-eliminating device.
Low pressure vapor system includes low pressure drum 9, low pressure recycle pump 12, and low pressure drum passes through the first down-comer 91 and low pressure
Circulating pump 12 is connected, and the outlet pipeline of low pressure recycle pump 12 branches into two-way, all the way with the water inlet of the first gasification cooling flue 3
Connection, another road connects with the water inlet of the apparatus for vapour-cooling of the fire door 51 of combustion settling chamber 5.First gasification cooling flue 3
Venthole, the venthole of the apparatus for vapour-cooling of the fire door 51 of combustion settling chamber 5 connected with the rising mouth of pipe of low pressure drum 9,
And low pressure drum 9 is connected by the second down-comer 94 with the water inlet of the low pressure evaporator in waste heat boiler, low pressure evaporator
Venthole connected with the rising mouth of pipe of low pressure drum.
Middle pressure boiler circuit includes middle pressure feed pump 13, middle pressure drum 10, Medium pressure cycle pump 15, and low pressure drum 9 is by the
One outlet pipe 93 is connected with middle pressure feed pump 13, the middle pressure economizer in the outlet pipeline and waste heat boiler 8 of middle pressure feed pump 13
84 water inlet connection, the delivery port of middle pressure economizer 84 is connected by pipeline 102 with the water inlet of middle pressure drum 10, and in
Pressure drum 10 is connected by the 3rd down-comer 101 with the water inlet of middle pressure evaporator 83, and the venthole of middle pressure evaporator 83 passes through
Pipeline 103 is connected with the rising mouth of pipe of middle pressure drum 10, forms a natural convection loop.
Middle pressure drum is connected by the 6th down-comer 104 with the water inlet of Medium pressure cycle pump 15, the water outlet of Medium pressure cycle pump
Pipeline is divided into several branch roads, respectively with the water inlet and the bell Vaporizing cooling of the combustion settling chamber of the second gasification cooling flue
Device water inlet is connected, and the venthole of the second gasification cooling flue, the bell apparatus for vapour-cooling venthole of combustion settling chamber lead to
Piping 106,107 is connected with the rising mouth of pipe of middle pressure drum, forms enclosed forced circulation loop.
High pressure boiler circuit includes high pressure water pump 14, high pressure drum 11, high-pressure circulation pump 16, and low pressure drum 9 is by the
Two outlet pipes 92 are connected with high pressure water pump 14, the high-pressure economizer 82 in the delivery port and waste heat boiler 8 of high pressure water pump 14
Water inlet connection, the delivery port of high-pressure economizer 82 connected by pipeline 113 with the water inlet of high pressure drum 11.High pressure drum
11 are connected by the 4th down-comer 111 with high-pressure circulation pump 16, the outlet conduit of high-pressure circulation pump 16 and the 3rd Vaporizing cooling cigarette
The water inlet connection in road 6, the venthole of the 3rd gasification cooling flue 6 is connected by pipeline 115 with the rising mouth of pipe of high pressure drum 11
It is logical.High pressure drum 11 is connected by the 5th down-comer 112 with the water inlet of the high pressure evaporator 81 in waste heat boiler 8, and high pressure is steamed
The venthole for sending out device 81 is connected by pipeline 118 with the rising mouth of pipe of high pressure drum 11, forms a natural convection loop, high pressure
Drum 11, the venthole combination storage heater of middle pressure drum 10, superheater coordinate filling condensing turbine 21 to complete UTILIZATION OF VESIDUAL HEAT IN.
Smoke waste heat utilization system of the invention has high pressure, middle pressure, low-pressure system, not only by being greatly reduced more than electric furnace
The exhaust gas temperature of heat utilization system and then the recovery electric furnace flue gas waste heat from " amount ", and according to energy grade height design heat exchange
System and then the recovery electric furnace flue gas waste heat from " matter ", realize energy step Optimum utilization.
Additionally, waste heat boiler is additionally provided with condensation water preheater 86, the condensation water preheater 86 is arranged on waste heat boiler 8
The fume side downstream of low pressure evaporator 85, is used for entering the condensate of steam turbine 21 by the fume afterheat after economizer cooling
Row preheating, not only further absorbs fume afterheat, improves the heat-economy of residual neat recovering system, but also can be lowered into down
Swim the flue-gas temperature of dust removal installation.
Additionally, being provided with one-level convection pass 7 between the 3rd gasification cooling flue 6 and waste heat boiler 8, set in convection pass
Convection recuperator is equipped with, a branch road is separated on the outlet conduit of high-pressure circulation pump 16 and is changed with the convection current in the convection pass 7
The water inlet of hot device is connected, and the venthole of the convection recuperator in convection pass 7 passes through the rising of pipeline 114 and high pressure drum 11
The mouth of pipe is connected.
Additionally, the first gasification cooling flue 3, the second gasification cooling flue 4, the 3rd gasification cooling flue 6 can be single
One section of only gasification cooling flue, or multistage gasification cooling flue combination.
Additionally, the first gasification cooling flue 3 can be using portable flue, the second gasification cooling flue 4 and the 3rd vaporization
Cooling stack 6 uses fixed flue, and gas approach end and the flue gas of the watercooling elbow 2 of the first gasification cooling flue 3 go out
Mouth end connects and has default gap, and the gap can adjust to control the air capacity of suction.The cigarette of the first gasification cooling flue 3
The gas port of export is connected with the gas approach end of second gasification cooling flue 4；First gasification cooling flue 3 and traction are filled
(not shown) connection is put, the draw-gear can drive the first gasification cooling flue 3 to be moved horizontally, and the first Vaporizing cooling cigarette
The smoke outlet in road 3 is then attached on the gas approach end of second gasification cooling flue 4 and moves horizontally, so as to control first
Gap between gasification cooling flue 3 and watercooling elbow 2, and then realize the regulation of furnace gas combustion air amount.
Additionally, condenser 23 is provided with water supplement port, to supplement the carbonated drink that afterheat utilizing system loses.
Additionally, the blow-off line of steam turbine 22 is connected with the condenser 23, condenser 23 and condensate pump 24, waste heat pot
The water inlet of condensation water preheater 86, low pressure drum 9 in stove 8 is sequentially connected along Water flow-path is condensed.Not only further absorb
Fume afterheat, improves the heat-economy of residual neat recovering system, but also can be lowered into the flue-gas temperature of downstream dust removal installation, has
Beneficial to the safe operation of dust removal installation, and improve its running environment, extend its service life.
The beneficial effects of the present invention are：
(1) the high-temperature flue gas waste heat to electric furnace is fully recycled, and overall plan is rationally distributed, first by vaporization
The mode of cooling reclaims the high-temperature flue gas used heat of electric furnace, then further absorbs fume afterheat by convection pass and reduces
Flue-gas temperature, to improve waste heat boiler service condition, the fume waste heat of electric furnace is reclaimed finally by the mode of waste heat boiler, will
Flue-gas temperature is reduced to uniform temperature, has not only reclaimed waste heat, can also provide bar for the safe operation of the dust removal installation in downstream
Part.
(2) security and heat-economy of system are taken into account in integral layout, boiler circuit is divided into three pressure systems, to protect
The quick cooling of first gasification cooling flue of the card in temperature end, and in view of the activity of combustion settling chamber fire door, vaporization
Cooling stack I and the cooling of combustion settling chamber fire door use low pressure vapor system, and its feedwater is by the relatively low low pressure drum of pressure
Lower water supply, produce low-pressure steam；The intermediate pressure section of the second gasification cooling flue, combustion settling chamber and waste heat boiler is used
Middle pressure boiler circuit, feedwater is supplied by the lower water of the medium middle pressure drum of pressure, produces middle pressure steam；And the 3rd Vaporizing cooling
Flue, convection pass, the high pressure section of waste heat boiler then use high pressure boiler circuit, and feedwater is by pressure with respect to highest high pressure drum
Lower water supply, produce high steam.Additionally, being further Mist heat recovering, one-level is set in the afterbody of waste heat boiler
Low pressure evaporator, produces low-pressure steam, and the low-pressure steam one produced with the first gasification cooling flue and combustion settling chamber fire door
Rise as deoxygenation steam.Three pressure systems designs, not only by be greatly reduced electric furnace waste-heat recovery device exhaust gas temperature and then
Electric furnace flue gas waste heat is reclaimed from " amount ", and electric furnace is reclaimed according to energy grade height design heat-exchange system and then from " matter "
Fume afterheat, realizes energy step Optimum utilization；Additionally, the design of present invention the whole series afterheat utilizing system, and each sets
Annexation between standby, be integrated system security and heat-economy after optimization layout.
(3) design is optimized to the heating surface inside waste heat boiler, traditional waste heat boiler typically receives afterbody
Hot face is arranged to economizer, and the present invention is additionally arranged one-level and condenses water preheater in waste heat boiler afterbody, lowers the temperature by economizer
Fume afterheat afterwards is used for preheating the condensate that steam turbine comes, and not only further absorbs fume afterheat, improves waste heat
The heat-economy of recovery system, but also the flue-gas temperature of downstream dust removal installation can be lowered into, be conducive to the peace of dust removal installation
Row for the national games, and improve its running environment, extend its service life.
The preferred embodiments of the present invention are the foregoing is only, is not intended to limit the invention, for those skilled in the art
For member, the present invention can have various modifications and variations.All any modifications within the spirit and principles in the present invention, made,
Equivalent, improvement etc., should be included within the scope of the present invention.
Claims (8)
1. a kind of electric furnace flue gas waste heat Optimum utilization system based on many die pressing types, including the watercooling elbow from above electric furnace (1)
(2) the first gasification cooling flue (3) that exhanst gas outlet is sequentially communicated along flow of flue gas direction, the second gasification cooling flue (4),
Combustion settling chamber (5), the 3rd gasification cooling flue (6) and waste heat boiler (8), high pressure evaporator (81) in waste heat boiler (8),
High-pressure economizer (82), middle pressure evaporator (83), middle pressure economizer (84) sequentially arrange that its feature exists along flow of flue gas direction
In,
The smoke waste heat utilization system is divided into low pressure vapor system, middle pressure boiler circuit, high pressure according to operating pressure difference again
Boiler circuit, wherein,
The low pressure vapor system is used to cool down the fire door (51) of the first gasification cooling flue (3) and combustion settling chamber (5), by low
Pressure drum (9) supply feedwater, so as to produce low-pressure steam；And
Medium pressure boiler circuit is used to absorb the second gasification cooling flue, the bell (52) of combustion settling chamber, waste heat boiler (8)
Intermediate pressure section flue gas heat, by it is middle pressure drum (10) supply feedwater, so as to produce middle pressure steam；
The high pressure boiler circuit is used to cool down the 3rd gasification cooling flue (6), the high pressure section of waste heat boiler (8), by pressure cooker
Cylinder (11) supply feedwater, so that high steam is produced,
The high pressure drum (11), it is middle pressure drum (10) output steam respectively through storage heater and superheater treatment after with steamer
Machine (21) coordinates completion UTILIZATION OF VESIDUAL HEAT IN,
Wherein, first gasification cooling flue is using portable flue, and second gasification cooling flue and the 3rd vaporization are cold
But flue uses fixed flue, the gas approach end of first gasification cooling flue and the exhanst gas outlet of the watercooling elbow
End connects and has default gap,
The smoke outlet of first gasification cooling flue is connected with the gas approach end of second gasification cooling flue,
Draw-gear is installed on first gasification cooling flue, the draw-gear can drive the first gasification cooling flue to carry out
Move horizontally, and the smoke outlet of the first gasification cooling flue is then attached to the gas approach end of second gasification cooling flue
On move horizontally, so as to control the gap between the first gasification cooling flue and watercooling elbow, and then adjust and enter first and vaporize
The combustion air amount of cooling stack.
2. the electric furnace flue gas waste heat Optimum utilization system based on many die pressing types according to claim 1, it is characterised in that
The low pressure vapor system includes low pressure drum (9), low pressure recycle pump (12), and the low pressure drum (9) is by under first
Drop pipe (91) is connected with low pressure recycle pump (12), and the outlet pipeline of the low pressure recycle pump (12) branches into two-way, all the way with the
The water inlet connection of one gasification cooling flue (3), another road is entered with the apparatus for vapour-cooling of the fire door (51) of combustion settling chamber (5)
The mouth of a river connect, the venthole of first gasification cooling flue (3), the fire door (51) of the combustion settling chamber (5) vaporization it is cold
But the venthole of device is connected with the rising mouth of pipe of the low pressure drum (9)；
Medium pressure boiler circuit includes middle pressure feed pump (13), middle pressure drum (10), Medium pressure cycle pump (15), the low pressure cooker
Cylinder (9) is connected by the first outlet pipe (93) with middle pressure feed pump (13), the outlet pipeline of medium pressure feed pump (13) and institute
State the water inlet connection of middle pressure economizer (84) in waste heat boiler (8), the delivery port of medium pressure economizer (84) with it is described
The water inlet connection of middle pressure drum (10), and
Medium pressure drum (10) is by the middle pressure evaporator (83) in the 3rd down-comer (101) and the waste heat boiler (8)
Water inlet is connected, and the venthole of medium pressure evaporator (83) is connected with the rising mouth of pipe of medium pressure drum (10), forms one
Individual natural convection loop；
Medium pressure drum (10) is connected by the 4th down-comer (104) with Medium pressure cycle pump (15), medium pressure circulating pump
(15) outlet conduit is divided into two branch roads, respectively the water inlet with second gasification cooling flue (4) and burning sedimentation
The apparatus for vapour-cooling of the bell (52) of room (5) water inlet connection, the venthole of second gasification cooling flue (4) and
The venthole of the apparatus for vapour-cooling of the bell (52) of combustion settling chamber (5) is upper with medium pressure drum (10) by pipeline
Mouth of pipe connection is risen, enclosed forced circulation loop is formed；
The high pressure boiler circuit includes high pressure water pump (14), high pressure drum (11), high-pressure circulation pump (16), the low pressure cooker
Cylinder (9) be connected with high pressure water pump (14) by the second outlet pipe (92), the delivery port of the high pressure water pump (14) with it is described
The water inlet connection of the high-pressure economizer (82) in waste heat boiler (8), the delivery port and the height of the high-pressure economizer (82)
The water inlet connection of pressure drum (11),
The high pressure drum (11) is connected by the 4th down-comer (111) with the high-pressure circulation pump (16), the cycle of higher pressure
The outlet conduit of pump (16) is connected with the water inlet of the 3rd gasification cooling flue (6), the 3rd gasification cooling flue (6)
Venthole connected with the rising mouth of pipe of the high pressure drum (11) by pipeline, form enclosed forced circulation loop,
The high pressure drum (11) is by the high pressure evaporator (81) in the 5th down-comer (112) and the waste heat boiler (8)
Water inlet is connected, and the venthole of the high pressure evaporator (81) is connected with the rising mouth of pipe of the high pressure drum (11), forms one
Individual natural convection loop.
3. the electric furnace flue gas waste heat Optimum utilization system based on many die pressing types according to claim 1, it is characterised in that
The venthole of the high pressure drum is connected with the air intake of the first storage heater, and the venthole of medium pressure drum and second stores
The air intake of hot device is connected；
The venthole of first storage heater is connected with the air intake for crossing the first superheater in heating flue, second storage heater
Venthole be connected with the air intake of the second superheater crossed in heating flue；
The venthole of first superheater is connected with the main steam import of the steam turbine, the venthole of second superheater
It is connected with the filling import of the steam turbine.
4. the electric furnace flue gas waste heat Optimum utilization system based on many die pressing types according to claim 1, it is characterised in that
Oxygen-eliminating device is also equipped with above the low pressure drum, low pressure drum doubles as deoxygenation water tank.
5. the electric furnace flue gas waste heat Optimum utilization system based on many die pressing types according to claim 1, it is characterised in that
Low pressure evaporator (85) is set in the afterbody of waste heat boiler, the low pressure drum (9) is by the second down-comer (94) and institute
State the water inlet connection of low pressure evaporator (85) in waste heat boiler (8), the venthole of the low pressure evaporator (85) with it is described
The rising mouth of pipe connection of low pressure drum (9).
6. the electric furnace flue gas waste heat Optimum utilization system based on many die pressing types according to claim 5, it is characterised in that
In waste heat boiler, condensation water preheater is additionally provided with the fume side downstream of the low pressure evaporator, for what is come to steam turbine
Condensate is preheated.
7. the electric furnace flue gas waste heat Optimum utilization system based on many die pressing types according to claim 2, it is characterised in that
Convection pass is provided between 3rd gasification cooling flue and waste heat boiler, heat convection is provided with the convection pass
Device, separates the water inlet of the convection recuperator in a branch road and the convection pass on the outlet conduit of the high-pressure circulation pump
It is connected, the venthole of the convection recuperator in the convection pass is connected by pipeline with the rising mouth of pipe of the high pressure drum.
8. the electric furnace flue gas waste heat Optimum utilization system based on many die pressing types according to claim 6, it is characterised in that
On condensation water preheater, low pressure drum in the blow-off line and condenser, condensate pump, waste heat boiler of the steam turbine
The water inlet of the oxygen-eliminating device of side is sequentially communicated along Water flow-path is condensed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710072153.0A CN106839791B (en) | 2017-02-08 | 2017-02-08 | Electric furnace flue gas waste heat Optimum utilization system based on multiple pressure mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710072153.0A CN106839791B (en) | 2017-02-08 | 2017-02-08 | Electric furnace flue gas waste heat Optimum utilization system based on multiple pressure mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106839791A true CN106839791A (en) | 2017-06-13 |
| CN106839791B CN106839791B (en) | 2019-02-19 |
Family
ID=59122181
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710072153.0A Active CN106839791B (en) | 2017-02-08 | 2017-02-08 | Electric furnace flue gas waste heat Optimum utilization system based on multiple pressure mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106839791B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332568A (en) * | 2018-04-08 | 2018-07-27 | 天津健威泽节能环保科技股份有限公司 | A kind of integrated waste heat boiler and implementation method of controllable vapor (steam) temperature |
| CN108645226A (en) * | 2018-05-24 | 2018-10-12 | 北京京诚科林环保科技有限公司 | A kind of electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system |
| CN115654950A (en) * | 2022-12-27 | 2023-01-31 | 思源交大河北科技有限公司 | Biomass afterburning type electric furnace flue gas waste heat recycling system |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5181709A (en) * | 1975-01-14 | 1976-07-17 | Kawasaki Heavy Ind Ltd | Koatsu teiatsuheiyogatatenrohaigasureikyakukei |
| JPH01252890A (en) * | 1988-03-30 | 1989-10-09 | Nippon Steel Corp | Recovery of exhaust heat of metallurical furnace |
| JPH03115517A (en) * | 1989-09-29 | 1991-05-16 | Kawasaki Steel Corp | Apparatus for cooling exhaust gas in converter |
| JPH07113110A (en) * | 1993-10-18 | 1995-05-02 | Nippon Steel Corp | Device for recovering heat in converter and control method thereof |
| CN201050944Y (en) * | 2007-05-30 | 2008-04-23 | 中冶京诚工程技术有限公司 | Residual heat recycling device for electric furnace smoke gas |
| CN201724568U (en) * | 2010-08-12 | 2011-01-26 | 宝钢工程技术集团有限公司 | Electric furnace double de-dusting remaining heat reclaim device |
| CN105201571A (en) * | 2015-10-14 | 2015-12-30 | 华北理工大学 | Converter double-heat-accumulator energy stacking, pressure stabilizing, heat accumulating and steam superheating system |
| CN205878931U (en) * | 2016-06-16 | 2017-01-11 | 北京博鹏北科节能环保股份有限公司 | High temperature gas cleaning and waste heat recovery system |
| CN206479050U (en) * | 2017-02-08 | 2017-09-08 | 中冶华天工程技术有限公司 | Electric furnace flue gas waste heat Optimum utilization system based on many die pressing types |
-
2017
- 2017-02-08 CN CN201710072153.0A patent/CN106839791B/en active Active
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5181709A (en) * | 1975-01-14 | 1976-07-17 | Kawasaki Heavy Ind Ltd | Koatsu teiatsuheiyogatatenrohaigasureikyakukei |
| JPH01252890A (en) * | 1988-03-30 | 1989-10-09 | Nippon Steel Corp | Recovery of exhaust heat of metallurical furnace |
| JPH03115517A (en) * | 1989-09-29 | 1991-05-16 | Kawasaki Steel Corp | Apparatus for cooling exhaust gas in converter |
| JPH07113110A (en) * | 1993-10-18 | 1995-05-02 | Nippon Steel Corp | Device for recovering heat in converter and control method thereof |
| CN201050944Y (en) * | 2007-05-30 | 2008-04-23 | 中冶京诚工程技术有限公司 | Residual heat recycling device for electric furnace smoke gas |
| CN201724568U (en) * | 2010-08-12 | 2011-01-26 | 宝钢工程技术集团有限公司 | Electric furnace double de-dusting remaining heat reclaim device |
| CN105201571A (en) * | 2015-10-14 | 2015-12-30 | 华北理工大学 | Converter double-heat-accumulator energy stacking, pressure stabilizing, heat accumulating and steam superheating system |
| CN205878931U (en) * | 2016-06-16 | 2017-01-11 | 北京博鹏北科节能环保股份有限公司 | High temperature gas cleaning and waste heat recovery system |
| CN206479050U (en) * | 2017-02-08 | 2017-09-08 | 中冶华天工程技术有限公司 | Electric furnace flue gas waste heat Optimum utilization system based on many die pressing types |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108332568A (en) * | 2018-04-08 | 2018-07-27 | 天津健威泽节能环保科技股份有限公司 | A kind of integrated waste heat boiler and implementation method of controllable vapor (steam) temperature |
| CN108645226A (en) * | 2018-05-24 | 2018-10-12 | 北京京诚科林环保科技有限公司 | A kind of electric furnace flue gas double-work medium heat exchange combined-circulation superheated steam system |
| CN108645226B (en) * | 2018-05-24 | 2023-12-29 | 北京京诚科林环保科技有限公司 | Electric stove flue gas double working medium heat exchange composite cycle superheated steam system |
| CN115654950A (en) * | 2022-12-27 | 2023-01-31 | 思源交大河北科技有限公司 | Biomass afterburning type electric furnace flue gas waste heat recycling system |
| CN115654950B (en) * | 2022-12-27 | 2023-03-28 | 思源交大河北科技有限公司 | Biomass afterburning type electric furnace flue gas waste heat recycling system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106839791B (en) | 2019-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101392992B (en) | Silicon smelting electric furnace waste heat power generation process flow and configuration | |
| CN108644862A (en) | Zero output depth of low pressure (LP) cylinder recycles the combining heating system of steam power plant's waste heat | |
| CN106642042A (en) | Intermediate reheat power generation process and system for coke dry quenching boiler | |
| CN106766966B (en) | A kind of heater for rolling steel waste heat recycling system | |
| CN106839791B (en) | Electric furnace flue gas waste heat Optimum utilization system based on multiple pressure mode | |
| CN206291194U (en) | A kind of gas generating system based on steel mill's saturated vapor Optimum utilization | |
| CN106839790A (en) | A kind of electric converter gas afterheat generating system | |
| CN105698161A (en) | Coal-fired power plant energy level matching heat integration system based on primary air | |
| CN106643191A (en) | Power generation system based on steel smelting furnace and steel rolling heating furnace waste heat integration | |
| CN104501608B (en) | The device and method of the overheated heating furnace saturated vapor of a kind of sintering large flue waste heat | |
| CN106705013B (en) | Electric furnace flue gas afterheat utilizing system based on multiple pressure mode | |
| CN206479050U (en) | Electric furnace flue gas waste heat Optimum utilization system based on many die pressing types | |
| CN106679439B (en) | A kind of heater for rolling steel afterheat utilizing system | |
| CN206656333U (en) | Electric furnace flue gas afterheat utilizing system based on more die pressing types | |
| CN206479052U (en) | A kind of electric converter gas afterheat generating system | |
| CN206479053U (en) | A kind of heater for rolling steel waste heat recycling system | |
| CN206309436U (en) | A kind of steam-driven blower system based on steel mill's saturated vapor Optimum utilization | |
| CN206479051U (en) | Electric converter gas afterheat utilizing system based on many die pressing types | |
| CN106705688B (en) | Electric converter gas waste heat Optimum utilization system based on multiple pressure pattern | |
| CN106500082A (en) | A kind of gas generating system based on steel mill's saturated vapor Optimum utilization | |
| CN106766965B (en) | A kind of converter and heater for rolling steel waste heat integrated power generation system | |
| CN106523058A (en) | Steam-driven blower system based on optimal utilization of saturated steam of steel mill | |
| CN205561575U (en) | System for sintering residual heat resources are retrieved and cascade utilization step by step | |
| CN101699038A (en) | Sintering ore cooling waste gas full combustion-supporting generating set | |
| CN106871651B (en) | A kind of heater for rolling steel waste heat Optimum utilization system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |