CN106766966A - A kind of heater for rolling steel waste heat recycling system - Google Patents
A kind of heater for rolling steel waste heat recycling system Download PDFInfo
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- CN106766966A CN106766966A CN201710068840.5A CN201710068840A CN106766966A CN 106766966 A CN106766966 A CN 106766966A CN 201710068840 A CN201710068840 A CN 201710068840A CN 106766966 A CN106766966 A CN 106766966A
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- Prior art keywords
- pressure
- flue
- waste heat
- drum
- gas
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Classifications
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- 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
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- 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
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- 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
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P10/00—Technologies related to metal processing
- Y02P10/25—Process efficiency
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P80/00—Climate change mitigation technologies for sector-wide applications
- Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
- Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply
Abstract
The invention discloses a kind of heater for rolling steel waste heat recycling system,Including Bottom of Heating Furnace water beam apparatus for vapour-cooling,Furnace outlet flue,Flue gas waste heat recovery flue,It is provided with furnace outlet flue including at least main air preheating device and/or at least stagewise air gas preheating device of one-level arrangement for gas preheating,For carrying out progressive solution to cold air and/or cooled coal gas,In furnace outlet flue,Therefrom a branch road is drawn after one-level preheating device to be connected with the flue gas waste heat recovery flue,Boiler circuit and heat-exchange system are designed according to flue gas grade height,The high-temperature flue gas of furnace outlet are exchanged heat using high pressure boiler circuit,Bottom of Heating Furnace water beam apparatus for vapour-cooling presses boiler circuit to be exchanged heat in using,Low-temperature flue gas in waste heat reclaiming flue are exchanged heat using low pressure vapor system,And using the acting of steam drive steam turbine.
Description
Technical field
The present invention relates to the field of energy-saving technology of steel industry, specifically, it is related to a kind of heater for rolling steel waste heat recovery
Using system.
Background technology
In each smelting procedure of iron and steel enterprise, steel rolling process is a very important link in Steel Production Flow Chart, is rolled
The energy consumption level of steel operation has very important influence for steel and iron industry ton steel comprehensive energy consumption.
Heater for rolling steel is to reheat bloom or continuous casting billet, the equipment to meet temperature needed for rolling.Heating furnace
Be in steel rolling process it is maximum with can equipment, therefore heater for rolling steel energy-conservation for steel rolling process or even the energy-conservation of whole steel mill
Consumption reduction work all has important impetus.Instantly steel industry is in the relative low ebb phase, and many steel mills are all in full profit
The state even lost money.In this case, each smelts UTILIZATION OF VESIDUAL HEAT IN, the energy-conservation of main equipment such as heater for rolling steel in sub- operation
Synergy has caused the attention of each steel mill.
At present, the technology of the aspect such as furnace equipment and heater control system of heater for rolling steel has all compared into
Ripe, for heater for rolling steel, the Main way of energy-conservation should be in heating furnace accessory system flue gas heat Optimum utilization, waste heat
The aspects such as recovery are tapped the potential energy.For recuperative heater, the current final exhaust gas temperature of heating furnace can be reduced to 150 DEG C with
Under, but for normal reheating furnace, in particular by air and the heating furnace of gas double pre-heating technology, most of exhaust gas temperatures are
300 DEG C or so, flue gas heat recovery rate is relatively low, causes the fume afterheat wasting of resources, but it discharges flue-gas temperature again not
It is very high, belongs to cryogenic waste heat resource, flue gas grade is slightly lower.Therefore, the present invention intends building a kind of heater for rolling steel waste heat recovery
Using system, air, gas preheating system and vapor-recovery system are considered as a whole, to the fume afterheat resource of heater for rolling steel
Utilization is optimized, fume afterheat grade and residual neat recovering system are improved in the case where air and gas preheating effect is ensured
Reasonability, can necessarily harvest considerable economic well-being of workers and staff, with important practical value.
The content of the invention
The invention provides a kind of heater for rolling steel waste heat recycling system, by air preheating system and Steam Recovery system
System is considered as a whole, and the fume afterheat resource to heater for rolling steel optimizes utilization, is ensureing air and gas preheating effect
In the case of improve the reasonability of fume afterheat grade and residual neat recovering system.
According to an aspect of the invention, there is provided a kind of heater for rolling steel waste heat recycling system, including heating furnace
Furnace bottom water beam apparatus for vapour-cooling, furnace outlet flue, flue gas waste heat recovery flue, are provided with point in furnace outlet flue
Level formula air-gas preheating device, the stagewise air-gas preheating device include at least main air preheating device and/
Or at least one-level arrangement for gas preheating, for carrying out progressive solution to cold air and/or cooled coal gas, by cold air and/or cold coal
Gas sends into heating furnace burner after being heated to design temperature, and a branch road and the flue gas are additionally provided with the furnace outlet flue
Waste heat reclaiming flue is connected, and the branch road is according to flue-gas temperature design load from a certain in stagewise air-gas preheating device
Drawn after level preheating device, being sequentially disposed with high-pressure superheater, high pressure along flue gas flow direction in flue gas waste heat recovery flue steams
Hair device, middle pressure superheater, high-pressure economizer, middle pressure economizer, low pressure evaporator, low-pressure coal saver, flue gas waste heat recovery flue,
Bottom of Heating Furnace water beam apparatus for vapour-cooling combination low pressure drum-oxygen-eliminating device, middle pressure drum and high pressure drum forms low pressure respectively
Boiler circuit, middle pressure boiler circuit, high pressure boiler circuit, produce the acting of steam drive steam turbine, wherein, it is high according to flue gas grade
It is low to carry out heat exchange design, the high-temperature flue gas of furnace outlet are exchanged heat using high pressure boiler circuit, Bottom of Heating Furnace water beam
Apparatus for vapour-cooling presses boiler circuit to be exchanged heat in using, and the low-temperature flue gas in waste heat reclaiming flue use low pressure vapor system
Exchanged heat.
Preferably, low pressure drum-oxygen-eliminating device is steamed by the first down-comer with the low pressure in the flue gas waste heat recovery flue
The water inlet connection of device is sent out, and the venthole of low pressure evaporator is upper with the low pressure drum-oxygen-eliminating device by the first tedge
Mouth of pipe connection is risen, a natural convection loop is formed, also, low pressure drum-oxygen-eliminating device passes through the first outlet pipe and middle pressure
The water inlet connection of feed pump, the delivery port of middle pressure feed pump is connected with the water inlet of middle pressure economizer, middle to press going out for economizer
The mouth of a river is connected by pipeline with the water inlet of middle pressure drum；Medium pressure drum is entered by the second down-comer and Medium pressure cycle pump
The mouth of a river is connected, and the delivery port of medium pressure circulating pump is connected with the water inlet of the furnace bottom water beam apparatus for vapour-cooling, the stove
The venthole of bottom water beam apparatus for vapour-cooling is connected by the second tedge with the rising mouth of pipe of medium pressure drum, forms one
Forced circulation loop, also, low pressure drum-oxygen-eliminating device connected by the second outlet pipe with the water inlet of high pressure water pump, and it is described
The delivery port of high pressure water pump is connected with the water inlet of high-pressure economizer, and the delivery port of high-pressure economizer passes through pipeline and pressure cooker
The water inlet connection of cylinder, high pressure drum is connected by the 3rd down-comer with the water inlet of the high pressure evaporator, high pressure evaporator
Venthole connected with the rising mouth of pipe of the high pressure drum by the 3rd tedge, formed a natural convection loop, it is described
The venthole of high pressure drum is connected with the air intake of high-pressure superheater, and the venthole of high-pressure superheater enters with the main steam of steam turbine
Mouth connection, and the venthole of middle pressure drum is connected with the air intake of middle pressure superheater, the venthole and steam turbine of middle pressure superheater
Filling inlet communication, increase steam turbine and exert oneself.
Preferably, the steam drain of steam turbine and condenser, condensate pump, low-pressure coal saver and low pressure drum-oxygen-eliminating device
Water inlet be sequentially communicated along carbonated drink flow.
Preferably, preposition devaporizer, the preposition devaporizer position are additionally provided with furnace outlet flue
In the fume side upstream of the stagewise air-gas preheating device, high pressure drum passes through the 4th down-comer and high-pressure circulation pump
Water inlet connection, the delivery port of high-pressure circulation pump connects with the water inlet of preposition devaporizer, preposition devaporizer
Venthole is connected by the 4th tedge with the rising mouth of pipe of high pressure drum.
Preferably, high-pressure superheater, high pressure evaporator, middle pressure superheater, high-pressure economizer, middle pressure economizer, low pressure are steamed
Hair device, low-pressure coal saver all use counter-flow arrangement.
Preferably, the flue gas waste heat recovery flue is the flue or integrated waste heat boiler of built-in heat-transfer surface.
Preferably, the venthole of medium pressure drum is heated with the auxiliary of the low pressure drum-oxygen-eliminating device by pipeline and steamed
Vapor inlet is connected.
Preferably, the preposition devaporizer uses down current arrangement.
Preferably, the low pressure drum-oxygen-eliminating device is the combination of low pressure drum and oxygen-eliminating device, and oxygen-eliminating device is installed on low pressure cooker
Cylinder top, low pressure drum doubles as deoxygenation water tank.
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 be represent the present embodiments relate to heater for rolling steel waste heat recycling system process chart.
Including heater for rolling steel 1, furnace bottom water beam apparatus for vapour-cooling 2, preposition devaporizer 3, flue gas waste heat recovery cigarette
Road 4 (inside sets high-pressure superheater 401, high pressure evaporator 402, middle pressure superheater 403, high-pressure economizer 404, middle pressure economizer
405th, low pressure evaporator 406, low-pressure coal saver 407), low pressure drum-oxygen-eliminating device 5, it is middle pressure feed pump 6, it is middle pressure drum 7, middle pressure
Circulating pump 8, high pressure water pump 9, high pressure drum 10, high-pressure circulation pump 11, steam turbine 12, condenser 13, condensate pump 14, first
Down-comer 51, the first tedge 52, the first outlet pipe 53, the second outlet pipe 54, pipeline 71, the second tedge 72, second decline
Pipe 73, pipeline 101, the 3rd down-comer 102, the 3rd tedge 103, the 4th tedge 104, the 4th down-comer 105.
Specific embodiment
The embodiment of heater for rolling steel waste heat recycling system of the present invention described below with reference to the accompanying drawings.This
The those of ordinary skill in field will recognize, without departing from the spirit and scope of the present invention, can with it is various not
Same mode or its combination is modified to described embodiment.Therefore, accompanying drawing and description are inherently illustrative, and
It is not intended to limit scope of the claims.Additionally, in this manual, accompanying drawing draws not in scale, and identical
Reference represents identical part.It should be noted that high pressure of the present invention, middle pressure, low pressure are to distinguish carbonated drink system
The pressure rating of system and carry out differentiation name (such as：High steam, middle pressure steam, the pressure of low-pressure steam separately design for
3.83MPa, 1.6MPa, 0.5MPa), not absolute high pressure (such as 9.81MPa), definitely middle pressure (such as 4.9MPa), absolute low pressure are (such as
0.8MPa).Direction of arrow flowing of the carbonated drink flowing along accompanying drawing in respective line in below describing.
The present invention is to provide for a kind of heater for rolling steel waste heat recycling system, and the system includes heater for rolling steel 1, stove
Bottom water beam apparatus for vapour-cooling 2, furnace outlet flue 3, flue gas waste heat recovery flue 4, low pressure drum-oxygen-eliminating device 5, middle pressure pot
Cylinder 7, high pressure drum 10, steam turbine 12.Wherein, the furnace bottom water beam apparatus for vapour-cooling 2 is arranged on the heater for rolling steel 1
In, for cooling down furnace bottom water beam, so as to produce steam water interface.Flue gas waste heat recovery flue can be traditional flue and in cigarette
Heat-transfer surface, or integrated waste heat boiler are set in road.Heating furnace furnace outlet flue gas then enter along figure by the direction of arrow A
Enter furnace outlet flue.
Stagewise air-gas preheater is arranged in furnace outlet flue according to flue-gas temperature height, uses high energy
The air of level is exchanged heat with the flue gas of high level, and the air of low-lying level is exchanged heat with the flue gas of low-lying level.The stagewise
Air-gas preheating device includes at least main air preheating device and/or at least one-level arrangement for gas preheating, for cold sky
Gas and/or cooled coal gas carry out progressive solution, and cold air and/or cooled coal gas are heated to deliver to heating furnace burning after design temperature again
Mouth.
Stagewise air-gas preheating device is described in detail with reference to Fig. 1.The first order air preheater 302,
One-level gas preheater 303, second level air preheater 304, second level gas preheater 305 are sequentially arranged along flue gas flow direction.
External cold air delivers to heating furnace burner after sequentially passing through first order air preheater, second level air preheat heating, similarly,
External cooled coal gas delivers to heating furnace burner (in figure not after sequentially passing through first order gas preheater, the heating of second level gas preheating
Show that air, coal gas are imported and exported).The above is only and illustrated by taking two-stage air-gas preheating device as an example, the stagewise air-coal
Gas preheating device is not limited to two-stage, can be more than two-stage, it is also possible to less than two-stage.Air preheater can also be separately provided
Or gas preheater is set.Under the fume side of the wherein one-level preheating device in the stagewise air-gas preheating device
Trip, the furnace outlet flue is provided with a branch road and is connected with the flue gas waste heat recovery flue, the position of the branch road according to
Flue-gas temperature design load is arranged on after the wherein one-level preheating device in stagewise air-gas preheating device.
Be provided with the flue gas waste heat recovery flue high-pressure superheater of counter-flow arrangement, high pressure evaporator, in press through
Hot device, high-pressure economizer, middle pressure economizer, low pressure evaporator, low-pressure coal saver.
The present embodiment carries out grading design according to flue gas grade height, and the high-temperature flue gas of furnace outlet are used into high pressure vapour
Water system is exchanged heat, and Bottom of Heating Furnace water beam apparatus for vapour-cooling presses boiler circuit to be exchanged heat in using, waste heat recovery cigarette
Low-temperature flue gas in road are exchanged heat using low pressure vapor system.Also, using safe operation as First Essential heating-furnace
Bottom water beam apparatus for vapour-cooling and the preposition devaporizer in excessive temperature area are designed to forced circulation pattern, and high pressure is steamed
Hair system and low pressure deoxygenation vapo(u)rization system are arranged to natural circulation mode, and each process pipeline flow is described in detail with reference to Fig. 1.
Low pressure drum-the oxygen-eliminating device 5 is the combination of low pressure drum and oxygen-eliminating device, and oxygen-eliminating device is installed on the top of low pressure drum, low pressure
Drum doubles as deoxygenation water tank.Low pressure drum-oxygen-eliminating device 5 is by the first down-comer 51 and the flue gas waste heat recovery flue 4
The water inlet connection of low pressure evaporator 406, and the venthole of low pressure evaporator 406 passes through the first tedge 52 and the low pressure cooker
The rising mouth of pipe connection of cylinder-oxygen-eliminating device, forms a natural convection loop.Low pressure drum-the oxygen-eliminating device 5 passes through the first water outlet
Pipe 53 is connected with the water inlet of middle pressure feed pump 6, and the delivery port of middle pressure feed pump is connected with the water inlet of middle pressure economizer 405,
Middle pressure economizer is supplied water by pipeline 71 to middle pressure drum 7.Medium pressure drum 7 is by the second down-comer 73 and Medium pressure cycle pump
8 water inlet connection, the delivery port of medium pressure circulating pump is connected with the water inlet of the furnace bottom water beam apparatus for vapour-cooling 2,
The venthole of the furnace bottom water beam apparatus for vapour-cooling is connected by the second tedge 72 with the rising mouth of pipe of the high pressure drum,
Form a forced circulation loop.Low pressure drum-oxygen-eliminating device 5 is connected by the second outlet pipe 54 with the water inlet of high pressure water pump 9
Logical, the delivery port of the high pressure water pump is connected with the water inlet of high-pressure economizer 404, high-pressure economizer pass through pipeline 101 to
High pressure drum 10 supplies water.High pressure drum is connected by the 3rd down-comer 102 with the water inlet of the high pressure evaporator 402, high pressure
The venthole of evaporator 402 is connected by the 3rd tedge 103 with the rising mouth of pipe of the high pressure drum, is formed one and is followed naturally
Loop back path, the venthole of the high pressure drum is connected with the air intake of high-pressure superheater 401, the venthole and vapour of high-pressure superheater
The main steam inlet communication of turbine, and the venthole of middle pressure drum is connected with the air intake of middle pressure superheater 403, middle pressure superheater
Venthole and steam turbine filling inlet communication, increase exerting oneself for steam turbine.The steam turbine can be used to drive generator hair
Electricity, it can also be used to drive other rotating machineries (such as blower fan or water pump) to do work.
Additionally, the outlet vapor pipeline of medium pressure drum separates a branch road, it is auxiliary with the low pressure drum-oxygen-eliminating device
Help heating steam inlet to connect, and reducer unit is additionally provided with the branch road.
Additionally, preposition devaporizer 3 is additionally provided with the exhaust pass of heater for rolling steel, the preposition evaporation cooling
Device can be arranged on the fume side upstream of the stagewise air-gas preheating device by the way of down current arrangement.Pressure cooker
Cylinder is connected by the 4th down-comer 105 with the water inlet of high-pressure circulation pump 11, and the delivery port of high-pressure circulation pump is cold with preposition evaporation
But the water inlet connection of device, the venthole of preposition devaporizer is by the 4th tedge 104 and the rising mouth of pipe of high pressure drum
Connection.
Additionally, the steam drain of steam turbine 12 and the condenser 13, the condensate pump 14, low-pressure coal saver and low pressure
The water inlet of drum-oxygen-eliminating device is sequentially connected along carbonated drink flow, and condenser is provided with water supplement port, to supplement residual neat recovering system
The carbonated drink for losing.Low-pressure coal saver can be preheated to the condensate that steam turbine comes, and not only further be absorbed more than flue gas
Heat, improves the heat-economy of residual neat recovering system, but also can be lowered into the flue-gas temperature of downstream dust removal installation, is conducive to removing
The safe operation of dirt facility.
In sum, heater for rolling steel waste heat recycling system of the invention has the advantages that：
(1) present invention is integrated to heater for rolling steel residual heat resources, by air-gas pre-heating system, heater for rolling steel
Furnace bottom water beam evaporated cooling system, heater for rolling steel tail flue gas residual neat recovering system are considered as a whole, unified layout, full
The grade that waste heat recovery flue gas is improve on the basis of sufficient heating furnace combustion needs is beneficial to effective utilization of fume afterheat, and
The smoke heat energy for farthest having reclaimed heating furnace is laid out by system optimization.
(2) present invention carries out rational deployment according to the grade of smoke heat energy, and be designed to for boiler circuit by boiler circuit aspect
Three pressure systems, grading design is carried out according to flue gas grade height, and the high-temperature flue gas of furnace outlet are used into high pressure boiler circuit
Exchanged heat, Bottom of Heating Furnace water beam apparatus for vapour-cooling presses boiler circuit to be exchanged heat in using, in waste heat reclaiming flue
Low-temperature flue gas are exchanged heat using low pressure vapor system；Air preheating system and gas preheating system are designed to be classified heated mould
Formula, is exchanged heat with the air of high level with the flue gas of high level, and the air of low-lying level is exchanged heat with the flue gas of low-lying level, with
Regular air preheating mode exchanges heat compared to systemDamage is greatly reduced.The present invention is not only discharged fume by the way that heater for rolling steel is greatly reduced
Temperature so from " amount " reclaim heater for rolling steel fume afterheat, and according to energy grade height design heat-exchange system so that from
Heater for rolling steel fume afterheat is reclaimed in " matter ", energy step Optimum utilization is realized；Additionally, present invention the whole series UTILIZATION OF VESIDUAL HEAT IN system
Annexation between the design of system, and each equipment, be integrated system security and heat-economy after optimization
Layout.
(3) present invention is carrying out the optimization design of heater for rolling steel furnace bottom water beam evaporated cooling system and residual neat recovering system
When, with reference to the features of Bottom of Heating Furnace water beam Vaporizing cooling, preposition devaporizer and waste heat reclaiming flue heating surface,
Steam-water circulation system is designed to the compound recycle mode of naturally partial order forced circulation, using safe operation as First Essential
Bottom of Heating Furnace water beam apparatus for vapour-cooling and the preposition devaporizer in excessive temperature area are designed to forced circulation pattern,
High-pressure evaporation system and low pressure deoxygenation vapo(u)rization system are arranged to natural circulation mode, a whole set of boiler circuit is ensureing system safety
The energy-saving run of system has been taken into account under the conditions of reliable again.
(4) present invention first sets the preposition devaporizer of one-level before flue gas waste heat recovery flue, can go out heating furnace
The temperature reduction of mouth high-temperature flue gas (some furnace outlet cigarette temperature are up to 1000 DEG C or so), so it is each in protection downstream flue
The safety of level heating surface；And with conventional many outputs compared with mixing by way of cold wind reduction cigarette temperature a certain amount of steam, have
There is more preferable economic well-being of workers and staff.
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 (9)
1. a kind of heater for rolling steel waste heat recycling system, including Bottom of Heating Furnace water beam apparatus for vapour-cooling (2), heating furnace
Exhaust pass (3), flue gas waste heat recovery flue (4), it is characterised in that
Stagewise air-gas preheating device, the stagewise air-gas preheating device are provided with furnace outlet flue
Including at least main air preheating device and/or at least one-level arrangement for gas preheating, for being carried out to cold air and/or cooled coal gas
Progressive solution, heating furnace burner is sent into after cold air and/or cooled coal gas are heated into design temperature,
A branch road is additionally provided with the furnace outlet flue to be connected with the flue gas waste heat recovery flue, the branch road according to
Flue-gas temperature design load is drawn after certain the one-level preheating device in stagewise air-gas preheating device,
High-pressure superheater (401), high pressure evaporator are sequentially disposed with along flue gas flow direction in flue gas waste heat recovery flue (4)
(402), middle pressure superheater (403), high-pressure economizer (404), middle pressure economizer (405), low pressure evaporator (406), low pressure are saved
Coal device (407),
Flue gas waste heat recovery flue (4), Bottom of Heating Furnace water beam apparatus for vapour-cooling (2) combine low pressure drum-oxygen-eliminating device (5),
Middle pressure drum (7) and high pressure drum (10) form low pressure vapor system, middle pressure boiler circuit, high pressure boiler circuit respectively, produce
Steam drive steam turbine (12) does work, wherein,
Heat exchange design is carried out according to flue gas grade height, the high-temperature flue gas of furnace outlet are changed using high pressure boiler circuit
Heat, Bottom of Heating Furnace water beam apparatus for vapour-cooling presses boiler circuit to be exchanged heat in using, the low temperature cigarette in waste heat reclaiming flue
Gas is exchanged heat using low pressure vapor system.
2. heater for rolling steel waste heat recycling system according to claim 1, it is characterised in that low pressure drum-deoxygenation
Device (5) is connected by the water inlet of the low pressure evaporator (406) in the first down-comer (51) and the flue gas waste heat recovery flue (4)
It is logical, and the venthole of low pressure evaporator (406) passes through the rising mouth of pipe of the first tedge (52) and the low pressure drum-oxygen-eliminating device
Connection, forms a natural convection loop, also,
The low pressure drum-oxygen-eliminating device (5) is connected by the first outlet pipe (53) with the water inlet of middle pressure feed pump (6), middle pressure
The delivery port of feed pump connect with the water inlet of middle pressure economizer (405), the delivery port of middle pressure economizer by pipeline (71) and
The water inlet connection of middle pressure drum (7)；
Medium pressure drum (7) is connected by the second down-comer (73) with the water inlet of Medium pressure cycle pump (8), medium pressure circulation
The delivery port of pump is connected with the water inlet of the furnace bottom water beam apparatus for vapour-cooling (2), the furnace bottom water beam apparatus for vapour-cooling
Venthole connected with the rising mouth of pipe of medium pressure drum by the second tedge (72), formed a forced circulation loop,
Also,
Low pressure drum-oxygen-eliminating device (5) is connected by the second outlet pipe (54) with the water inlet of high pressure water pump (9), the high pressure
The delivery port of feed pump is connected with the water inlet of high-pressure economizer, and the delivery port of high-pressure economizer passes through pipeline (101) and high pressure
The water inlet connection of drum (10),
High pressure drum is connected by the 3rd down-comer (102) with the water inlet of the high pressure evaporator (402), high pressure evaporator
(402) venthole is connected by the 3rd tedge (103) with the rising mouth of pipe of the high pressure drum, forms a Natural Circulation
Loop,
The venthole of the high pressure drum (10) is connected with the air intake of high-pressure superheater (401), the venthole of high-pressure superheater
With the main steam inlet communication of steam turbine, and
The venthole of middle pressure drum is connected with the air intake of middle pressure superheater (403), the venthole and steam turbine of middle pressure superheater
Filling inlet communication, increase steam turbine and exert oneself.
3. heater for rolling steel waste heat recycling system according to claim 2, it is characterised in that the row of steam turbine (12)
The water inlet of steam ports and condenser (13), condensate pump (14), low-pressure coal saver and low pressure drum-oxygen-eliminating device (5) is along carbonated drink
Flow is sequentially communicated.
4. heater for rolling steel waste heat recycling system according to claim 2, it is characterised in that in furnace outlet cigarette
Preposition devaporizer (301) is additionally provided with road, the preposition devaporizer is preheated positioned at the stagewise air-gas
The fume side upstream of device, high pressure drum is connected by the 4th down-comer (105) with the water inlet of high-pressure circulation pump (11), high pressure
The delivery port of circulating pump is connected with the water inlet of preposition devaporizer, and the venthole of preposition devaporizer rises by the 4th
Pipe (104) is connected with the rising mouth of pipe of high pressure drum.
5. heater for rolling steel waste heat recycling system according to claim 1, it is characterised in that
High-pressure superheater, high pressure evaporator, middle pressure superheater, high-pressure economizer, middle pressure economizer, low pressure evaporator, low pressure are saved
Coal device all uses counter-flow arrangement.
6. heater for rolling steel waste heat recycling system according to claim 1, it is characterised in that the fume afterheat is returned
Receive flue or integrated waste heat boiler that flue is built-in heat-transfer surface.
7. heater for rolling steel waste heat recycling system according to claim 1, it is characterised in that medium pressure drum
Venthole heats steam inlet and is connected by pipeline with the auxiliary of the low pressure drum-oxygen-eliminating device.
8. heater for rolling steel waste heat recycling system according to claim 4, it is characterised in that the preposition evaporation is cold
But device uses down current arrangement.
9. heater for rolling steel waste heat recycling system according to claim 1, it is characterised in that the low pressure drum-
Oxygen-eliminating device is the combination of low pressure drum and oxygen-eliminating device, and oxygen-eliminating device is installed on low pressure drum top, and low pressure drum doubles as deoxygenation water tank.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN107940439A (en) * | 2017-10-25 | 2018-04-20 | 河南中烟工业有限责任公司 | A kind of boiler smoke heat energy recycling system |
| CN108855941A (en) * | 2018-07-26 | 2018-11-23 | 郑州沃特节能科技股份有限公司 | A kind of steel slag micro mist using steel plant's waste heat flue gas selects powder system |
| CN109098797A (en) * | 2017-06-21 | 2018-12-28 | 华北理工大学 | A kind of coal gas electricity generation system |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571280A (en) * | 2009-06-11 | 2009-11-04 | 河北理工大学 | Multi-pressure and multi-inlet generating waste heat boiler |
| EP2562270A1 (en) * | 2010-04-20 | 2013-02-27 | JP Steel Plantech Co. | Waste heat recovery facility for arc furnace for steel making, arc furnace facility for steel making, and waste heat recovery method for arc furnace for steel making |
| CN103291390A (en) * | 2013-06-20 | 2013-09-11 | 华效资源有限公司 | Heating furnace flue gas and steam waste heat recycling and power generating system and power generating method |
| CN104180675A (en) * | 2014-08-19 | 2014-12-03 | 中冶华天工程技术有限公司 | Power generation system using heating furnace waste heat integrally |
| CN106052407A (en) * | 2016-08-08 | 2016-10-26 | 中冶华天南京工程技术有限公司 | Heating furnace waste heat comprehensive utilization system |
| CN106122929A (en) * | 2016-08-30 | 2016-11-16 | 华能国际电力股份有限公司 | A kind of dosing for combined cycle generating unit multiple pressure waste heat boiler and sampler |
| CN206479053U (en) * | 2017-02-08 | 2017-09-08 | 中冶华天工程技术有限公司 | A kind of heater for rolling steel waste heat recycling system |
-
2017
- 2017-02-08 CN CN201710068840.5A patent/CN106766966B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101571280A (en) * | 2009-06-11 | 2009-11-04 | 河北理工大学 | Multi-pressure and multi-inlet generating waste heat boiler |
| EP2562270A1 (en) * | 2010-04-20 | 2013-02-27 | JP Steel Plantech Co. | Waste heat recovery facility for arc furnace for steel making, arc furnace facility for steel making, and waste heat recovery method for arc furnace for steel making |
| CN103291390A (en) * | 2013-06-20 | 2013-09-11 | 华效资源有限公司 | Heating furnace flue gas and steam waste heat recycling and power generating system and power generating method |
| CN104180675A (en) * | 2014-08-19 | 2014-12-03 | 中冶华天工程技术有限公司 | Power generation system using heating furnace waste heat integrally |
| CN106052407A (en) * | 2016-08-08 | 2016-10-26 | 中冶华天南京工程技术有限公司 | Heating furnace waste heat comprehensive utilization system |
| CN106122929A (en) * | 2016-08-30 | 2016-11-16 | 华能国际电力股份有限公司 | A kind of dosing for combined cycle generating unit multiple pressure waste heat boiler and sampler |
| CN206479053U (en) * | 2017-02-08 | 2017-09-08 | 中冶华天工程技术有限公司 | A kind of heater for rolling steel waste heat recycling system |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109098797A (en) * | 2017-06-21 | 2018-12-28 | 华北理工大学 | A kind of coal gas electricity generation system |
| CN109098797B (en) * | 2017-06-21 | 2023-10-20 | 华北理工大学 | Coal-fired gas power generation system |
| CN107940439A (en) * | 2017-10-25 | 2018-04-20 | 河南中烟工业有限责任公司 | A kind of boiler smoke heat energy recycling 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 |
| CN108855941A (en) * | 2018-07-26 | 2018-11-23 | 郑州沃特节能科技股份有限公司 | A kind of steel slag micro mist using steel plant's waste heat flue gas selects powder system |
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