CN106705013A - Electric furnace flue gas waste heat utilization system based on multi-pressure mode - Google Patents
Electric furnace flue gas waste heat utilization system based on multi-pressure mode Download PDFInfo
- Publication number
- CN106705013A CN106705013A CN201710069287.7A CN201710069287A CN106705013A CN 106705013 A CN106705013 A CN 106705013A CN 201710069287 A CN201710069287 A CN 201710069287A CN 106705013 A CN106705013 A CN 106705013A
- Authority
- CN
- China
- Prior art keywords
- pressure
- flue
- waste heat
- venthole
- 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
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B1/00—Methods of steam generation characterised by form of heating method
- F22B1/28—Methods of steam generation characterised by form of heating method in boilers heated electrically
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
- F22B31/00—Modifications of boiler construction, or of tube systems, dependent on installation of combustion apparatus; Arrangements of dispositions of combustion apparatus
- F22B31/08—Installation of heat-exchange apparatus or of means in boilers for heating air supplied for combustion
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F22—STEAM GENERATION
- F22D—PREHEATING, OR ACCUMULATING PREHEATED, FEED-WATER FOR STEAM GENERATION; FEED-WATER SUPPLY FOR STEAM GENERATION; CONTROLLING WATER LEVEL FOR STEAM GENERATION; AUXILIARY DEVICES FOR PROMOTING WATER CIRCULATION WITHIN STEAM BOILERS
- F22D1/00—Feed-water heaters, i.e. economisers or like preheaters
- F22D1/50—Feed-water heaters, i.e. economisers or like preheaters incorporating thermal de-aeration of feed-water
-
- 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
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Environmental & Geological Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Engine Equipment That Uses Special Cycles (AREA)
Abstract
The invention discloses an electric furnace flue gas waste heat utilization system based on a multi-pressure mode. The electric furnace flue gas waste heat utilization system comprises a first vaporized cooling flue, a second vaporized cooling flue, a combustion settling chamber, a third vaporized cooling flue and a waste heat boiler which communicate with one another in sequence from a water cooling elbow flue gas outlet above an electric furnace in the flue gas flowing direction; a high-pressure evaporator, a high-pressure coal economizer, a medium-pressure evaporator and a medium-pressure coal economizer in the waste heat boiler are arranged in sequence in the flue gas flowing direction, and the first vaporized cooling flue and a furnace door of the combustion settling chamber are cooled through a low-pressure steam water system, water is supplied by a low-pressure boiler barrel, and low-pressure steam is generated; a high-pressure steam water system is adopted for the second vaporized cooling flue, the combustion settling chamber, the third vaporized cooling flue and the high-pressure segment of the waste heat boiler, water is supplied by a high-pressure boiler barrel, and high-pressure steam is generated; and a medium-pressure steam water system is adopted for the medium-pressure segment of the waste heat boiler, water is supplied by a medium-pressure boiler barrel, and medium-pressure steam is generated; and the steam output by the high-pressure boiler barrel and the medium-pressure boiler barrel drives a turbine to work after passing through a heat accumulator and a superheater.
Description
Technical field
The present invention relates to the field of energy-saving technology of steel industry, more particularly to the electric furnace flue gas waste heat profit based on many die pressing types
Use 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 UTILIZATION OF VESIDUAL HEAT IN scheme 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 Practical significance.
The content of the invention
The invention provides a kind of electric furnace flue gas afterheat utilizing system based on many die pressing types, including from above electric furnace 1
The first gasification cooling flue 3, the second gasification cooling flue that the exhanst gas outlet of watercooling elbow 2 is sequentially communicated along flow of flue gas direction
4th, 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 save coal
Device 82, middle pressure evaporator 83, middle pressure economizer 84, low pressure evaporator 85 sequentially arrange along flow of flue gas direction, the flue gas
Afterheat utilizing system is divided into low pressure vapor system, middle pressure boiler circuit, high pressure boiler circuit according to operating pressure difference again, its
In, the low pressure vapor system is used for the fire door 51 of the first gasification cooling flue 3 and combustion settling chamber 5, is supplied by low pressure drum 9
Feedwater, so as to produce low-pressure steam；And medium pressure boiler circuit is used for the flue gas heat of the intermediate pressure section for absorbing waste heat boiler 8,
Feedwater is supplied by middle pressure drum 10, so as to produce middle pressure steam；The high pressure boiler circuit is used to cool down the second Vaporizing cooling cigarette
Road 4, the bell 52 of combustion settling chamber 5, the 3rd gasification cooling flue 6, the high pressure section of waste heat boiler 8, are supplied by high pressure drum 11
Feedwater, so as to produce high steam, the venthole of the high pressure drum is connected with the air intake of the first storage heater, medium pressure pot
The venthole of cylinder is connected with the air intake of the second storage heater；The venthole of first storage heater and the first mistake crossed in heating flue
The air intake of hot device is connected, and the venthole of second storage heater is connected with the air intake for crossing the second superheater in heating flue；
The venthole of first superheater is connected with the main steam import of the steam turbine, the venthole of second superheater and institute
The filling import for stating steam turbine is connected, wherein, it is the combustion furnace flue being separately provided to cross heating flue, or other smelting procedures of steel mill
On high-temperature flue.
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, also, the low pressure drum 9 passes through the second down-comer 94 and the waste heat
The water inlet connection of the low pressure evaporator 85 in boiler 8, the venthole of the low pressure evaporator 85 is upper with the low pressure drum 9
Rise mouth of pipe connection；Medium pressure boiler circuit includes middle pressure drum 10, middle pressure feed pump 13, and the low pressure drum 9 passes through first
Outlet pipe 93 is connected with middle pressure feed pump 13, the middle pressure in the outlet pipeline of medium pressure feed pump 13 and the waste heat boiler 8
The water inlet connection of economizer 84, the delivery port of medium pressure economizer 84 is connected with the water inlet of medium pressure drum 10, and
And medium pressure drum 10 is connected by the 3rd down-comer 101 with the water inlet of the middle pressure evaporator 83 in the waste heat boiler 8,
The venthole of medium pressure evaporator is connected with the rising mouth of pipe of medium pressure drum, forms a natural convection loop；It is described
High pressure boiler circuit includes high pressure drum 11, high pressure water pump 14, high-pressure circulation pump 15, and the low pressure drum 9 goes out by second
Water pipe 92 is connected with high pressure water pump 14, and the delivery port of the high pressure water pump 14 saves coal with the high pressure in the waste heat boiler 8
The water inlet connection of device 82, the delivery port of the high-pressure economizer is connected with the water inlet of the high pressure drum 11；The high pressure
Drum 11 is connected by the 4th down-comer 111 with the high-pressure circulation pump 15, and the outlet conduit of the high-pressure circulation pump is divided into many
Individual branch road, water inlet respectively with second gasification cooling flue, the water inlet of the 3rd gasification cooling flue and combustion
Burn the water inlet connection of the apparatus for vapour-cooling of the bell of expansion chamber, the venthole of second gasification cooling flue, described the
The venthole of the apparatus for vapour-cooling of the venthole of three gasification cooling flues and the bell of combustion settling chamber by pipeline with
The rising mouth of pipe connection of the high pressure drum 11, forms enclosed forced circulation loop, and the high pressure drum passes through the 5th down-comer
112 are connected with the water inlet of the high pressure evaporator in the waste heat boiler 8, the venthole of the high pressure evaporator 81 and the height
The rising mouth of pipe connection of drum is pressed, a natural convection loop is formed.
Preferably, oxygen-eliminating device is also equipped with above the low pressure drum, low pressure drum doubles as deoxygenation water tank.
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 condenser is provided with water supplement port, to supplement the carbonated drink that afterheat utilizing system loses.
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 schematic diagram of the electric furnace flue gas afterheat utilizing system based on many die pressing types for representing the embodiment of the present invention.
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, high-pressure circulation pump 15, the first storage heater 16, the second accumulation of heat
Device 17, excessively heating flue 18, the first superheater 19, the second superheater 20, steam turbine 21, condenser 22, condensate pump 23, generator
24th, the first down-comer 91, the second outlet pipe 92, the first outlet pipe 93, the second down-comer 94, the 3rd down-comer 101, pipeline 102,
Pipeline 103, the 4th down-comer 111, the 5th down-comer 112, pipeline 113, pipeline 114, pipeline 115, pipeline 116, pipeline 117,
Pipeline 118.
Specific embodiment
The electric furnace flue gas afterheat utilizing system based on many die pressing types of the present invention described below with reference to the accompanying drawings
Embodiment.One of ordinary skill in the art will recognize, without departing from the spirit and scope of the present invention, can be with
Described embodiment is modified with a variety of modes or its combination.Therefore, accompanying drawing and description is inherently said
Bright property, it is not intended to limit the scope of the claims.Additionally, in this manual, accompanying drawing draws not in scale, and
And identical reference represents identical part.It should be noted that high pressure of the present invention, middle pressure, low pressure are for area
The pressure rating of point boiler circuit and the differentiation name that carries out are (such as：High steam, middle pressure steam, the pressure difference of low-pressure steam
Be designed as 3.83MPa, 1.6MPa, 0.5MPa), not absolute high pressure (such as 9.81MPa), definitely in pressure (such as 4.9MPa), definitely
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 afterheat utilizing system based on many die pressing types, including along flow of flue gas direction according to
First gasification cooling flue 3 of secondary connection, the second gasification cooling flue 4, combustion settling chamber 5, the 3rd gasification cooling flue 6 and remaining
Heat boiler 8, wherein, the smoke inlet of the first gasification cooling flue 3 is connected with the exhanst gas outlet of the watercooling elbow 2 of the top of electric furnace 1.
Flue gas arrow A directions circulation along Fig. 1 is dynamic.High pressure evaporator 81, high-pressure economizer 82, middle pressure evaporator in waste heat boiler 8
83rd, middle pressure economizer 84 is sequentially arranged along flow of flue gas direction.The 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；
And the high pressure section of the second gasification cooling flue 4, combustion settling chamber 5, the 3rd gasification cooling flue 6, waste heat boiler 8 then uses high pressure
Boiler circuit, its feedwater is supplied by high pressure drum, so as to produce high steam；The intermediate pressure section of waste heat boiler 8 presses carbonated drink in using
System, its feedwater is supplied by middle pressure drum 10, so as to produce middle pressure steam.And by the flue gas of waste heat boiler treatment then along arrow
Head B directions enter the dust removal installation in downstream.The high pressure drum 11, it is middle pressure drum 10 outlet steam respectively through storage heater,
Coordinate with steam turbine 21 after superheater treatment and complete UTILIZATION OF VESIDUAL HEAT IN.Specifically, the venthole and first of the high pressure drum 11
The air intake of storage heater 16 is connected, and the venthole of medium pressure drum 10 is connected with the air intake of the second storage heater 17；Described
The venthole of one storage heater 16 is connected with the air intake of first superheater 19 crossed in heating flue 18, second storage heater
17 venthole is connected with the air intake of second superheater 20 crossed in heating flue 18.It can individually set to cross heating flue 18
High-temperature flue on the combustion furnace flue put, or borrow or other smelting procedures of shared steel mill, such as heating furnace afterbody cigarette
Road, central cooler waste heat boiler flue etc..High-temperature flue gas entered in heating flue 18 along arrow C directions, and steam turbine 21 uses filling
Condensing turbine, the venthole of first superheater 19 is connected with the main steam import of the steam turbine 21, and described second
The venthole of superheater 20 is connected with the filling import of the steam turbine 21.The steam turbine 21 can be used to drive generator 24 to send out
Electricity, it can also be used to which Driving Fan or water pump do work.Drum in the above high pressure drum, middle pressure drum, low pressure drum is also known as
Drum, is most important pressure parts in waste heat boiler.
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 is used for further recovered flue gas
Waste heat, produce low-pressure steam, and is produced with the cooling device of the first gasification cooling flue 3 and the fire door 51 of combustion settling chamber 5
Low-pressure steam is together as deoxygenation steam.
The low pressure vapor system includes low pressure drum 9, low pressure recycle pump 12, and the low pressure drum passes through the first down-comer
91 are 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 described first vaporization
The water inlet connection of cooling stack 3, another road connects with the water inlet of the apparatus for vapour-cooling of the fire door 51 of the combustion settling chamber 5
It is 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, and the low pressure drum 9 is by the second down-comer 94 and waste heat pot
The water inlet connection of the low pressure evaporator in stove, the venthole of the low pressure evaporator connects with the rising mouth of pipe of the low pressure drum
It is logical.
Medium pressure boiler circuit includes middle pressure drum 10, middle pressure feed pump 13, and the low pressure drum 9 passes through the first water outlet
Pipe 93 is connected with middle pressure feed pump 13, and the outlet pipeline of medium pressure feed pump 13 saves coal with the middle pressure in the waste heat boiler 8
The water inlet connection of device 84, the delivery port of medium pressure economizer 84 is by pipeline 102 and the water inlet of medium pressure drum 10
Connection, and medium pressure drum 10 is by the water inlet of the middle pressure evaporator 83 in the 3rd down-comer 101 and the waste heat boiler 8
Mouth is connected, and the venthole of medium pressure evaporator 83 is connected by pipeline 103 with the rising mouth of pipe of medium pressure drum 10, is formed
One natural convection loop；
The high pressure boiler circuit includes high pressure drum 11, high pressure water pump 14, high-pressure circulation pump 15, the low pressure drum
9 are connected by the second outlet pipe 92 with high pressure water pump 14, in the delivery port of the high pressure water pump 14 and the waste heat boiler 8
High-pressure economizer 82 water inlet connection, the delivery port of the high-pressure economizer 82 passes through pipeline 113 and the high pressure drum
11 water inlet connection；The high pressure drum 11 is connected by the 4th down-comer 111 with the high-pressure circulation pump 15, the high pressure
The outlet conduit of circulating pump 15 is divided into multiple branch roads, and water inlet respectively with second gasification cooling flue 4, the burning are sunk
The water inlet connection of the apparatus for vapour-cooling water inlet, the 3rd gasification cooling flue 6 of the bell 52 of room 5 is dropped.Described second
The venthole of gasification cooling flue 4 is connected by pipeline 117 with the rising mouth of pipe of the high pressure drum 11, the 3rd vaporization is cold
But the venthole of flue 6 connected with the rising mouth of pipe of the high pressure drum 11 by pipeline 115, the stove of the combustion settling chamber 5
The venthole of the apparatus for vapour-cooling of lid 52 is connected by pipeline 116 with the rising mouth of pipe of the high pressure drum 11, so as to be formed
Enclosed forced circulation loop.The high pressure drum 11 is by the high pressure evaporator in the 5th down-comer 112 and the waste heat boiler 8
81 water inlet is connected, and the venthole of the high pressure evaporator 81 passes through the rising mouth of pipe of pipeline 118 and the high pressure drum 11
Connection, forms a natural convection loop, the high pressure drum 11, venthole combination storage heater, the superheater of middle pressure drum 10
Filling condensing turbine 21 is coordinated 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, the low pressure drum 9 is additionally provided with oxygen-eliminating device 95, oxygen-eliminating device 95 is installed on the top of low pressure drum 9, so low
Pressure drum 9 can double as deoxygenation water tank.
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, one-level convection pass 7 is provided between the 3rd gasification cooling flue 6 and waste heat boiler 8, the convection pass
In be provided with convection recuperator, in separating a branch road and the convection pass 7 on the outlet conduit of the high-pressure circulation pump 15
The water inlet of convection recuperator be connected, the venthole of the convection recuperator in the convection pass 7 passes through pipeline 114 and high pressure
The rising mouth of pipe of drum 11 is connected.
Additionally, first gasification cooling flue 3, the second gasification cooling flue 4, the 3rd gasification cooling flue 6 can
Single one section of gasification cooling flue, or multistage gasification cooling flue combination.
Additionally, first gasification cooling flue 3 can be using portable flue, the He of the second gasification cooling flue 4
3rd gasification cooling flue 6 uses fixed flue, and the gas approach end of first gasification cooling flue 3 is curved with the water-cooled
First 2 smoke outlet is connected and has default gap, and the gap can adjust to control the air capacity of suction.First vapour
The smoke outlet for changing cooling stack 3 is connected with the gas approach end of second gasification cooling flue 4；First vaporization is cold
But flue 3 and draw-gear (not shown) are connected, and the draw-gear can drive the first gasification cooling flue 3 to be moved horizontally,
And the smoke outlet of the first gasification cooling flue 3 is then attached to level on the gas approach end of second gasification cooling flue 4
It is mobile, so as to control the gap between the first gasification cooling flue 3 and watercooling elbow 2, and then realize furnace gas combustion air amount
Regulation.
Additionally, the condenser is provided with water supplement port, to supplement the carbonated drink that afterheat utilizing system loses.
Additionally, the blow-off line of steam turbine 21 is connected with the condenser 22, the condensing 22 and the condensate pump 23,
The water inlet of condensation water preheater 86, the oxygen-eliminating device 95 of low pressure drum 9 in waste heat boiler 8 is sequentially connected along Water flow-path is condensed.
Fume afterheat is not only further absorbed, the heat-economy of residual neat recovering system is improved, but also downstream dedusting can be lowered into
The flue-gas temperature of facility, is conducive to the safe operation of dust removal installation, and improves its running environment, extends 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 is reclaimed first by way of Vaporizing cooling
The high-temperature flue gas used heat of electric furnace, then further absorbs fume afterheat and reduces flue-gas temperature by convection pass, to improve
Waste heat boiler service condition, the fume waste heat of electric furnace is reclaimed finally by the mode of waste heat boiler, and flue-gas temperature is reduced to
Uniform temperature, has not only reclaimed waste heat, can also provide condition for the safe operation of the dust removal installation in downstream.
(2) security and heat-economy of system are taken into account in integral layout, boiler circuit are divided into three pressure systems,
Not only by the way that the exhaust gas temperature of electric furnace afterheat utilizing system and then the recovery electric furnace flue gas waste heat from " amount " is greatly reduced, and press
Electric furnace flue gas waste heat is reclaimed according to energy grade height design heat-exchange system and then from " matter ", energy step optimization profit is realized
With；Additionally, the design of present invention the whole series afterheat utilizing system, and the annexation between each equipment, it is 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 condensation water preheater in waste heat boiler afterbody, by after economizer cooling
Fume afterheat is used for preheating the condensate that steam turbine comes, and not only further absorbs fume afterheat, improves waste heat recovery
The heat-economy of system, but also the flue-gas temperature of downstream dust removal installation can be lowered into, be conducive to the safety fortune of dust removal installation
OK, 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 (5)
1. a kind of electric furnace flue gas afterheat utilizing system based on many die pressing types, including watercooling elbow (2) from above electric furnace (1)
The first gasification cooling flue (3), the second gasification cooling flue (4), burning that exhanst gas outlet is sequentially communicated along flow of flue gas direction
Expansion chamber (5), the 3rd gasification cooling flue (6) and waste heat boiler (8), the high pressure evaporator (81) in waste heat boiler (8), high pressure
Economizer (82), middle pressure evaporator (83), middle pressure economizer (84), low pressure evaporator (85) are along flow of flue gas direction sequentially cloth
Put, it is characterised in that
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 for the fire door (51) of the first gasification cooling flue (3) and combustion settling chamber (5), by low pressure cooker
Cylinder (9) supply feedwater, so as to produce low-pressure steam；And
Medium pressure boiler circuit is used for the flue gas heat of the intermediate pressure section for absorbing waste heat boiler (8), is supplied by middle pressure drum (10)
Feedwater, so as to produce middle pressure steam；
The high pressure boiler circuit is used to cool down the second gasification cooling flue (4), bell (52), the 3rd of combustion settling chamber (5)
The high pressure section of gasification cooling flue (6), waste heat boiler (8), is supplied by high pressure drum (11) and fed water, so that high steam is produced,
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,
Wherein, it is the high-temperature flue on the combustion furnace flue being separately provided, or other smelting procedures of steel mill to cross heating flue.
2. the electric furnace flue gas afterheat utilizing 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), also,
The low pressure drum (9) is entered by low pressure evaporator (85) in the second down-comer (94) and the waste heat boiler (8)
The mouth of a river is connected, and the venthole of the low pressure evaporator (85) is connected with the rising mouth of pipe of the low pressure drum (9)；
Medium pressure boiler circuit includes middle pressure drum (10), middle pressure feed pump (13), and the low pressure drum (9) goes out by first
Water pipe (93) is connected with middle pressure feed pump (13), in the outlet pipeline of medium pressure feed pump (13) and the waste heat boiler (8)
Middle pressure economizer (84) water inlet connection, the delivery port of medium pressure economizer (84) and entering for medium pressure drum (10)
The mouth of a river connects, 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；
The high pressure boiler circuit includes high pressure drum (11), high pressure water pump (14), high-pressure circulation pump (15), 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 (15), the cycle of higher pressure
The outlet conduit of pump (15) is divided into multiple branch roads, water inlet respectively with second gasification cooling flue (4), the 3rd vapour
Change the water inlet connection of the apparatus for vapour-cooling of the water inlet of cooling stack (6) and the bell (52) of combustion settling chamber (5), institute
State venthole, the venthole and combustion settling chamber of the 3rd gasification cooling flue (6) of the second gasification cooling flue (4)
(5) venthole of the apparatus for vapour-cooling of bell (52) is connected by pipeline with the rising mouth of pipe of the high pressure drum (11)
It is logical, enclosed forced circulation loop is formed,
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 afterheat utilizing 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.
4. the electric furnace flue gas afterheat utilizing 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.
5. the electric furnace flue gas afterheat utilizing system based on many die pressing types according to claim 7, it is characterised in that
The condenser is provided with water supplement port, to supplement the carbonated drink that afterheat utilizing system loses.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069287.7A CN106705013B (en) | 2017-02-08 | 2017-02-08 | Electric furnace flue gas afterheat utilizing system based on multiple pressure mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710069287.7A CN106705013B (en) | 2017-02-08 | 2017-02-08 | Electric furnace flue gas afterheat utilizing system based on multiple pressure mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106705013A true CN106705013A (en) | 2017-05-24 |
| CN106705013B CN106705013B (en) | 2019-02-19 |
Family
ID=58910577
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710069287.7A Active CN106705013B (en) | 2017-02-08 | 2017-02-08 | Electric furnace flue gas afterheat utilizing system based on multiple pressure mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106705013B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024120A (en) * | 2017-05-26 | 2017-08-08 | 中冶华天南京工程技术有限公司 | A kind of low-temperature flue gas of heating furnace and furnace bottom water beam waste heat comprehensive utilization system |
| CN107631640A (en) * | 2017-11-02 | 2018-01-26 | 中冶赛迪工程技术股份有限公司 | A kind of electric furnace residual neat recovering system and method |
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 |
| CN206656333U (en) * | 2017-02-08 | 2017-11-21 | 中冶华天工程技术有限公司 | Electric furnace flue gas afterheat utilizing system based on more die pressing types |
-
2017
- 2017-02-08 CN CN201710069287.7A patent/CN106705013B/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 |
| CN206656333U (en) * | 2017-02-08 | 2017-11-21 | 中冶华天工程技术有限公司 | Electric furnace flue gas afterheat utilizing system based on more die pressing types |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107024120A (en) * | 2017-05-26 | 2017-08-08 | 中冶华天南京工程技术有限公司 | A kind of low-temperature flue gas of heating furnace and furnace bottom water beam waste heat comprehensive utilization system |
| CN107631640A (en) * | 2017-11-02 | 2018-01-26 | 中冶赛迪工程技术股份有限公司 | A kind of electric furnace residual neat recovering system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106705013B (en) | 2019-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103234362B (en) | Device and process for generating power through efficient recovery of waste heat of sintered ores | |
| CN102851420B (en) | Steelmaking residual heat step recycling method | |
| CN103644743A (en) | Combination system for efficiently using waste heat in iron mine sintering cooling process | |
| CN106766966B (en) | A kind of heater for rolling steel waste heat recycling system | |
| CN106480251A (en) | A kind of heat storage type converter exhaust heat recovering method and device | |
| CN106839790A (en) | A kind of electric converter gas afterheat generating system | |
| CN106839791B (en) | Electric furnace flue gas waste heat Optimum utilization system based on multiple pressure mode | |
| CN106322427A (en) | Deslagging waste heat utilization system and deslagging waste heat utilization method for circulating fluidized bed boiler | |
| CN106643191A (en) | Power generation system based on steel smelting furnace and steel rolling heating furnace waste heat integration | |
| CN106705013B (en) | Electric furnace flue gas afterheat utilizing system based on multiple pressure mode | |
| CN104501608B (en) | The device and method of the overheated heating furnace saturated vapor of a kind of sintering large flue waste heat | |
| CN206479052U (en) | A kind of electric converter gas afterheat generating system | |
| CN206656333U (en) | Electric furnace flue gas afterheat utilizing system based on more die pressing types | |
| CN106679439B (en) | A kind of heater for rolling steel afterheat utilizing system | |
| CN206479051U (en) | Electric converter gas afterheat utilizing system based on many die pressing types | |
| CN206479053U (en) | A kind of heater for rolling steel waste heat recycling system | |
| CN206479050U (en) | Electric furnace flue gas waste heat Optimum utilization system based on many die pressing types | |
| CN106705688B (en) | Electric converter gas waste heat Optimum utilization system based on multiple pressure pattern | |
| CN106766965B (en) | A kind of converter and heater for rolling steel waste heat integrated power generation system | |
| CN206309436U (en) | A kind of steam-driven blower system based on steel mill's saturated vapor Optimum utilization | |
| CN101699038A (en) | Sintering ore cooling waste gas full combustion-supporting generating set | |
| CN206281365U (en) | A kind of high-temp waste gas afterheat utilizing system | |
| CN205561575U (en) | System for sintering residual heat resources are retrieved and cascade utilization step by step | |
| CN106871651B (en) | A kind of heater for rolling steel waste heat Optimum utilization system | |
| CN106855363B (en) | Electric converter gas afterheat utilizing system based on multiple pressure mode |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |