CN107904344A - A kind of heat regenerator and hot-blast stove flue gas residual-heat utilization method - Google Patents
A kind of heat regenerator and hot-blast stove flue gas residual-heat utilization method Download PDFInfo
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- CN107904344A CN107904344A CN201711098987.5A CN201711098987A CN107904344A CN 107904344 A CN107904344 A CN 107904344A CN 201711098987 A CN201711098987 A CN 201711098987A CN 107904344 A CN107904344 A CN 107904344A
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 37
- 239000003546 flue gas Substances 0.000 title claims abstract description 37
- 238000000034 method Methods 0.000 title claims abstract description 21
- 230000001172 regenerating effect Effects 0.000 claims abstract description 85
- 238000005338 heat storage Methods 0.000 claims abstract description 25
- 238000012546 transfer Methods 0.000 claims abstract description 9
- 239000007789 gas Substances 0.000 claims description 65
- 239000003034 coal gas Substances 0.000 claims description 51
- 238000010438 heat treatment Methods 0.000 claims description 26
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 23
- 239000011449 brick Substances 0.000 claims description 16
- 238000005192 partition Methods 0.000 claims description 14
- 230000008676 import Effects 0.000 claims description 11
- 229910052757 nitrogen Inorganic materials 0.000 claims description 11
- 238000002485 combustion reaction Methods 0.000 claims description 10
- 239000000779 smoke Substances 0.000 claims description 10
- 239000011819 refractory material Substances 0.000 claims description 9
- 238000009825 accumulation Methods 0.000 claims description 7
- 239000002184 metal Substances 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 6
- 239000000203 mixture Substances 0.000 claims description 6
- 238000010926 purge Methods 0.000 claims description 6
- 230000008569 process Effects 0.000 claims description 5
- 239000002699 waste material Substances 0.000 claims description 4
- 239000012774 insulation material Substances 0.000 claims description 3
- 238000004093 laser heating Methods 0.000 claims description 3
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000005516 engineering process Methods 0.000 abstract description 10
- 230000000694 effects Effects 0.000 abstract description 8
- 230000008859 change Effects 0.000 description 8
- 239000012530 fluid Substances 0.000 description 6
- 239000002918 waste heat Substances 0.000 description 6
- 239000010410 layer Substances 0.000 description 4
- 239000007769 metal material Substances 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 229910001220 stainless steel Inorganic materials 0.000 description 3
- 239000010935 stainless steel Substances 0.000 description 3
- 229910000831 Steel Inorganic materials 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 238000009792 diffusion process Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 239000010959 steel Substances 0.000 description 2
- 235000017899 Spathodea campanulata Nutrition 0.000 description 1
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- 230000000712 assembly Effects 0.000 description 1
- 238000000429 assembly Methods 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
- 229910001873 dinitrogen Inorganic materials 0.000 description 1
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- 235000013399 edible fruits Nutrition 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
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- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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- 208000011580 syndromic disease Diseases 0.000 description 1
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/02—Brick hot-blast stoves
- C21B9/04—Brick hot-blast stoves with combustion shaft
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
-
- 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
- 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
- F27D2017/007—Systems for reclaiming waste heat including regenerators
-
- 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
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
- Air Supply (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The present invention provides a kind of regenerative heat-exchange stove and heat regenerator, and the method that UTILIZATION OF VESIDUAL HEAT IN is carried out using the heat exchanger, above device and method can not only obtain the heat transfer effect more more stable than existing residual-heat utilization technology, and the stability and service life of flue gas residual heat using device are substantially improved, extend the application range of heat storage exchanging apptss.
Description
Technical field
The present invention relates to a kind of device for utilizing residual heat of high-temperature waste, and the hot-blast stove flue gas waste heat profit using the device
Use method.
Background technology
In blast furnace process hot blast stove system, it is that the flue gas mean temperature of hot-blast stove discharge is about than more typical operating mode
250 DEG C ~ 300 DEG C, 350 DEG C ~ 450 DEG C of maximum temperature, it is not energy saving enough that such high-temperature waste flue gas do not meet discharge standard yet, because
This, usually can all utilize residual-heat utilization technology recovery waste heat, most common technology is dividing wall type heat exchanger, especially in engineering
The dividing wall type heat exchanger of metal material.The basic functional principle of so-called dividing wall type heat exchanger is hot and cold two kinds of fluids（Such as two kinds cold
Hot gas）By one layer of solid wall surface（Such as the pipe or plate of metal material）Separate, do not mix, heat exchange is carried out by partition,
Wall type heat exchanger is adapted to apply at lower pressures, and generally should not be in high temperature applicationss application.In order to avoid making metal material
The dividing wall type heat exchanger equipment of matter is chronically in sour environment, and the flue gas exhaust temperature of heat exchanger is generally greater than 100 DEG C.
In typical blast furnace process hot blast stove system, hot-blast stove is burning stove（Heating）Stage, coal gas and air mixing combustion
Flue gas is generated after burning, from about 250 DEG C ~ 300 DEG C of the flue gas mean temperature of hot-blast stove lower part discharge, maximum temperature 350 DEG C ~ 450
DEG C, this partial heat of flue gas is used for warm-up combustion-supporting air and coal gas by afterheat utilizing system, disappears so as to reduce coal gas
Consumption improves hot-blast stove dome temperature, final to realize the target for improving hot wind wind-warm syndrome.It can be said that flue gas UTILIZATION OF VESIDUAL HEAT IN system
System, which has become, improves one of Blast Temperature, the most effective measure for improving hot blast stove system efficiency.
At present, develop by technology for many years, the most common dividing wall type of blast funnace hot blast stove flue gas afterheat utilizing system changes
Hot device form is heat-pipe heat exchanger and plate heat exchanger, wherein, the history of heat-pipe heat exchanger application is longer, quantity also more
It is more.
Hot-tube flue gas exchanger is using hot pipe technique, the heat exchange using the cold air of the waste-heat of heat smoke or coal gas
Equipment.Heat pipe is a kind of element with very high thermal conductivity, it passes through in Totally enclosed vacuum intraductal working medium (working media)
Evaporation transmits heat with condensing, and heat pipe is generally made of (i.e. working media) shell and internal working fluid.It is steel, closed
It is evacuated in shell, working media is then specially treated liquid（Water can also be used）.Heat pipe heat side absorbs high
Warm flue gas heat, is transmitted to working media in pipe, boiling and evaporation, are changed into steam after medium heat absorption by heat pipe wall；Steam exists
Cold side, the cooling of managed outer cryogenic gas are risen under the action of pressure difference, steam condenses and outwards releases the latent heat of vaporization, low temperature
For gas so as to obtain heat, this when, the working media of condensation is returned to heat side by gravity.So in cycles, high temperature
The heat of flue gas is just transmitted to cryogenic gas.Heat pipe has high thermal conductivity, good isothermal, the heat transfer area of cold and hot both sides
The advantages that can arbitrarily changing, therefore, compared to old-fashioned finned pipe heat exchanger, heat exchange of heat pipe it is with the obvious advantage, quickly
It is widely applied to comparing.
In specific blast funnace hot blast stove UTILIZATION OF VESIDUAL HEAT IN engineering, the dust impurities of blast furnace gas are more complicated, and coal gas is aqueous
And flow is big, pressure is low, flow velocity is low etc., under this working condition, heat exchange of heat pipe is put into practice engineering there are some and is tested
The drawbacks of card, for example, Large Heat Tube Exchanger basically can not disassembly, cleaning, in preheating gas, heat pipe can be subject to gas dust
Pollution, produces fouling, influences heat transfer effect, the service life is generally 5-8；In addition, as big blast-furnace technique develops, large blast furnace heat
Wind furnace flue gas flow is increasing, this causes heat exchanger apparatus volume increasing.
An other common technology for blast funnace hot blast stove flue gas residual-heat utilization technology is plate heat exchanger（Most common type
Formula is dismountable frame-type）.Plate heat exchanger is a series of one formed by sheet metal closed assemblies with certain corrugated shape
Kind high-performance heat exchanger.Thin rectangular shape passage is formed between various plates, heat exchange is carried out by plate.Working fluid is in two boards
Flowed through in the narrow and tortuous passage formed between piece.Cold fluid and hot fluid passes sequentially through runner, and there is an interlayer plate in centre by fluid
Separate, and exchanged heat by this plate.
The plate heat exchanger applied in blast funnace hot blast stove field of waste heat utilization be by heat transferring plate, gasket seal, pressure strip,
The major parts such as upper lower guide rod, pillar, fishbolt form.Heat transferring plate is generally made of stainless steel, design of heat exchanger fan
The medium channel of palace formula, makes heat transferring medium reverse flow in adjacent passage, through strengthen heat radiation, thermal convection current, heat transfer into
The sufficient heat exchange of row.Plate heat exchanger is started late in blast funnace hot blast stove field of waste heat utilization application, but because its heat exchange effect
Rate is higher than heat exchange of heat pipe, and because disassembling cleaning, service life are longer（8-10）, therefore with preferable application before
Scape.
With various shell-and-tube heat exchangers（Including heat exchange of heat pipe）Compare, the major advantage of plate heat exchanger includes：1st, change
The thermal efficiency is high, and 2, floor space and occupied space are smaller, and 3, easy to clean, convenient for disassembly and assembly, 4, service life length.
But compared with heat exchange of heat pipe, when being heated using plate heat exchanger to coal gas, flue gas and coal gas are only
Isolated by the stainless steel heat transfer plate of multi-disc 1-2mm thickness, therefore there are some potential safety problems, further, since plate heat exchanger
Because being suppressed using stainless steel plate, price is far above heat exchange of heat pipe, have impact on this technology in blast funnace hot blast stove heat transferring plate
Popularization and application in terms of flue gas UTILIZATION OF VESIDUAL HEAT IN.
In conclusion commonly used with high-blast-temperature hot-blast stove, hot-blast stove afterheat utilizing system has become raising wind
One of temperature, the important technique measure for reducing energy consumption.But it is all dividing wall type heat exchanger, either heat exchange of heat pipe or plate-type heat-exchange
Device, all there are some to limit drawback, and such as heat exchange of heat pipe short life, the problem of heat exchange efficiency is relatively low, plate heat exchanger is then valency
The problems such as lattice are higher, security is relatively low when for gas preheating；Since analysis of blast furnace gas ingredient is complex, metal material is deposited
In aggressivity, therefore all there is a service life in various dividing wall type heat exchangers.
The content of the invention
For above-mentioned problems of the prior art, the present invention provides a kind of regenerative heat-exchange stove and regenerative heat-exchange
Device, and the method using heat exchanger progress UTILIZATION OF VESIDUAL HEAT IN, can not only obtain more more stable than existing residual-heat utilization technology
Heat transfer effect, and the stability and service life of flue gas residual heat using device are substantially improved, extend heat accumulating type and change
The application range of thermal.
To achieve these goals, technical scheme is as follows：
A kind of regenerative heat-exchange stove, including regenerative chamber and vault, vault are arranged on regenerative chamber top and are communicated with regenerative chamber, accumulation of heat
Interior is provided with heat storage, and gas inlet and hot-blast outlet are provided with vault, and regenerative chamber lower part is provided with cold wind import and cigarette
Gas exports, and the heat transfer process of regenerative heat-exchange stove includes two stages：In the heating period, heat smoke enters storage from gas inlet
Discharged in hot cell after heat storage body from exhanst gas outlet；In the air-supply stage, cold wind enters regenerative chamber from cold wind import, by accumulation of heat
Discharged after body heating from hot-blast outlet.
The bottom of the regenerative chamber is provided with the fire grate of support heat storage.
It is resistance to made of the heat storage polyhedron checker brick or refractory material with clear opening made of refractory material
Fireball.
Regenerative chamber is surrounded by furnace shell, and furnace shell is made of metal shell and the thermal insulation material being arranged on metal shell inner wall.
The vault is hollow cone or rectangular pyramid shape.
A kind of heat regenerator, including two above-mentioned regenerative heat-exchange stoves, wherein a regenerative heat-exchange stove heat
During air-flow heat storage body, the heat storage heating cold wind of another regenerative heat-exchange stove heat；Two parts regenerative heat-exchange stove is handed over
For heat storage body and heating cold wind is carried out, the laser heating to cold wind is realized.
Present invention also offers a kind of hot-blast stove flue gas residual-heat utilization method, using two groups of heat regenerators to combustion-supporting
Air and coal gas are carried out at the same time preheating, and one of which is used for warm-up combustion-supporting air, and another set is used for preheating gas, for coal gas
The heat regenerator of preheating carries nitrogen purging device, first to regenerative heat-exchange stove before regenerative heat-exchange stove heat coal gas
Purged.
The step of two regenerative heat-exchange stoves of heat regenerator are according to heating → partition → air-supply alternately reciprocal operation,
When a wherein regenerative heat-exchange stove is in heating, partition state, in addition a regenerative heat-exchange stove is in the air-supply stage.
Heat regenerator for preheating gas carries out nitrogen purging in partition state.
Heated combustion air and gas temperature are adjusted by the way of mixed wind, keeps the combustion air into hot-blast stove
It is constant with gas temperature.
The technique effect that the present invention has：
1st, heat regenerator is formed by one group and at least by two regenerative heat-exchange stoves, and two regenerative heat-exchange stoves are alternately to storing
Refractory material heat storage in hot stove is heated and cooled down, so as to fulfill to cold wind（Such as combustion air or coal gas）It is continuous plus
Heat.
, regenerative heat-exchange stove furnace shell be made of metal furnace shell and thermal insulation material, made of refractory material heat storage and
Furnace shell insulating layer has anti-erosion effect, and can run steadily in the long term, and service life is up to 20-30, the work with hot-blast stove
It is the same as the time limit.
, regenerative heat-exchange stove be to utilize heat smoke and cold wind（Such as cold combustion air or cooled coal gas）Through accumulation of heat physique
Directly carry out heat exchange with heat storage while hole, in the form of convective heat exchange based on, heat exchange efficiency is high, and resistance damage is small, and not
Meeting dust accumulation inside heat storage.
, mixed wind mode can be used to adjust the combustion air after heating（Or coal gas）Temperature, keeps after heat exchanger
Into the air of hot-blast stove（Or coal gas）Temperature is kept constant, and is conducive to hot-blast stove stable operation.
, using heat regenerator be not required heat exchanging furnace body to be safeguarded, therefore reduce afterheat utilizing system
Maintenance cost.
Brief description of the drawings
By the description carried out below in conjunction with the accompanying drawings to the embodiment of the present invention, technical scheme and its technology effect
Fruit will become clearer, and more easily understand.
Regenerative heat-exchange stove schematic diagram in Fig. 1-embodiment of the present invention 1；
Regenerative type air coal gas heat-exchange system composition figure in Fig. 2-embodiment of the present invention 2；
Regenerative type air coal gas heat-exchange system working system schematic diagram in Fig. 3-embodiment of the present invention 2.
Wherein：
Regenerative heat-exchange stove 101, vault 102, regenerative chamber 103, heat storage 104, fire grate 105, gas inlet pipeline 106, heat
Wind outlet 107, exhanst gas outlet 108, cold wind import 109；
First coal gas recuperative furnace 1, the second coal gas recuperative furnace 2, the first air heat-exchange stove 3, the second air heat-exchange stove 4, hot-blast stove group
5, chimney 6, breaching 7, nitrogen bag 8, gas main 9, air header 10, coal gas recuperative furnace smoke inlet valve 11, coal gas changes
Heating furnace flue outlet valve 12, coal gas recuperative furnace gas entry valve 13, coal gas recuperative furnace gas exit valve 14, nitrogen stop valve 15,
Exhanst gas outlet diffusion valve 16, gas main stop valve 17, gas main regulating valve 18, air header stop valve 19, air header
Regulating valve 20, flue gas manifold stop valves 21, air heat-exchange kiln gas inlet valve 22, air heat-exchange kiln gas outlet valve 23, air
Recuperative furnace air inlet valve 24, air heat-exchange stove air outlet valve 25.
Embodiment
The invention will be further described with embodiment for explanation below in conjunction with the accompanying drawings：
Embodiment 1
Fig. 1 shows the structure of regenerative heat-exchange stove, a kind of regenerative heat-exchange stove 101, by 103 groups of vault 102 and regenerative chamber
Into vault 102 is arranged on the top of regenerative chamber 103 and is communicated with regenerative chamber 103, and regenerative chamber 103 is surrounded by furnace shell 110, accumulation of heat
For the shape of room 103 to be circular or square, furnace shell 110 is by metal shell and is arranged on the refractory materials of metallic steel housings and keeps the temperature
Layer composition, refractory material insulating layer can be refractory brick or the spray paint with heat insulation effect.
The shape of vault 102 can be the conical structure or tetragonous vertebral body structure for having cavity, and regenerative chamber 103 includes
The heat storage 104 being arranged on inside regenerative chamber 103 and the fire grate 105 for being arranged on 103 bottom of regenerative chamber, fire grate 105 is by grate
Daughter board and pillar composition, grate plate are supported on 103 bottom of regenerative chamber by pillar, and heat storage 104 is placed on grating, heat storage
104 are made of refractory material, can be the polyhedron checker brick or flame-proof sphere for having multiple clear openings, in this implementation
Heat storage 104 is formed using grid brick masonry in example.
102 top of the vault access of regenerative heat-exchange stove has gas inlet pipeline 106, is accessed on the side wall of vault 102
There is hot-blast outlet 107, being accessed on the furnace shell 110 of 103 lower part of regenerative chamber has exhanst gas outlet 108 and cold wind import 109.
The heat transfer process of the regenerative heat-exchange stove 101 is divided into " heating " and " air-supply " two stages：In regenerative heat-exchange stove
" heating " stage, cold wind import 109 and hot-blast outlet 107 close, and flue gas enters vault 102 from gas inlet pipeline 106, then
Heat exchange is carried out into the checker brick in regenerative chamber 103 and heat accumulating type 103, checker brick are heated after heat exchange, after cooling
The exhanst gas outlet 108 of flue gas from 103 lower part of regenerative chamber discharge；In " air-supply " stage of regenerative heat-exchange stove, flue gas inlet tube
Road 106 and exhanst gas outlet 108 are closed, and cold wind enters regenerative chamber 103 from the cold wind import 109 of 103 lower part of regenerative chamber, and cold wind is storing
It is changed into hot wind with heating after the checker brick heat exchange of heating in hot cell 103, hot wind is discharged from the hot-blast outlet 107 of vault 102.
In order to realize continuous heating, at least two regenerative heat-exchange stoves composition heat regenerators can be used, at least two
Regenerative heat-exchange stove is divided into two groups, while one of which regenerative heat-exchange stove is with flue gas checker brick, another group of accumulation of heat
The checker brick heating cold wind of formula recuperative furnace heat, the alternately checker brick heating and checker brick cooling of two groups of regenerative heat-exchange stoves,
It can then realize the laser heating to cold wind.
Embodiment 2
Fig. 2 shows a kind of regenerative type air and gas preheating system, which utilizes blast funnace hot blast stove flue gas
Waste heat is carried out at the same time preheating to combustion air and coal gas, which includes heat accumulating type gas change heater, regenerative type air
Heat exchanger, breaching 7, nitrogen bag 8, gas main 9 and air header 10, heat accumulating type gas change heater are changed including the first coal gas
1 and second coal gas recuperative furnace 2 of hot stove, regenerative type air heat exchanger include the first air heat-exchange stove 3 and the second air heat-exchange stove 4,
Coal gas recuperative furnace and air heat-exchange stove use the regenerative heat-exchange furnace structure that embodiment 1 describes, breaching 7 and each heat exchange furnace roof
The gas inlet pipeline in portion communicates, and gas main 9 is communicated with the cold wind import of coal gas heat exchange furnace bottom, air header 10 and air
The cold wind import of heat exchange furnace bottom communicates, and nitrogen bag 8 is communicated by pipeline with the gas inlet pipeline at the top of coal gas recuperative furnace, phase
The inlet and outlet of pass is both provided with corresponding valve.
When heat regenerator system works, gas main stop valve 17, air header stop valve 19 and flue gas manifold
Stop valve 21 is closed.
The heat regenerator has three kinds of working statuses：" heating ", " partition " and " air-supply ", heat regenerator according to
The program of heating → partition → air-supply → partition → heating is back and forth run
When the first coal gas recuperative furnace 1 is in " heating " state, the smoke inlet valve 11 and exhanst gas outlet of the first coal gas recuperative furnace 1
Valve 12 is in opening, and gas entry valve 13 and gas exit valve 14 are closed, the flue gas that hot-blast stove group 5 produces
Enter the first coal gas recuperative furnace 1 through breaching 7, enter the first coal gas recuperative furnace 1 from the vault of the first coal gas recuperative furnace 1, it is right
Checker brick in regenerative chamber are heated.
After the first coal gas recuperative furnace 1 completes " to heat " program, that is, it is transferred to " partition " state, 1 cigarette of the first coal gas recuperative furnace
Gas inlet valve 11 and exhanst gas outlet valve 12 are closed, and gas entry valve 13 and gas exit valve 14 at this time, are opened still in closed mode
The outlet stop valve 15 that nitrogen bag 8 connects the first coal gas recuperative furnace 1 is opened, the exhanst gas outlet for opening the first coal gas recuperative furnace 1 diffuses
Valve 16, carries out nitrogen purging, purged waste nitrogen gas is discharged through exhanst gas outlet diffusion valve 16 to the first coal gas recuperative furnace 1.
At the same time, the second coal gas recuperative furnace 2 is in " air-supply " state, 2 smoke inlet valve of the second coal gas recuperative furnace, 11 He
Exhanst gas outlet valve 12 is closed, and gas entry valve 13 and gas exit valve 14 are in opening, and coal gas is total through coal gas
Pipe 9 enters from the regenerative chamber lower part of the second coal gas recuperative furnace 2, from the second coal gas recuperative furnace 2 after regenerative chamber is heated by checker brick
Vault discharge, burn into the hot-blast stove 5.
When the second coal gas recuperative furnace 2 completes " to blow " program, the first coal gas recuperative furnace 1 has been completed " to separate " state
And nitrogen purging procedure, the first coal gas recuperative furnace 1 are transferred to " air-supply " state, meanwhile, the second coal gas recuperative furnace 2 is transferred to " partition " shape
State, the first coal gas recuperative furnace 1 and the second coal gas recuperative furnace 2 replace " air-supply ", that is, realize heat accumulating type gas change heater company
Continuous work.
When the first air heat-exchange stove 3 is in " heating " state, the smoke inlet valve 22 and flue gas of the first air heat-exchange stove 3
Outlet valve 23 is in opening, and air inlet valve 24 and air outlet valve 25 are closed, flue gas through breaching 7 from
The vault of first air heat-exchange stove 3 enters the first air heat-exchange stove 3, and the checker brick in regenerative chamber are heated.
After the first air heat-exchange stove 3 completes " to heat " program, that is, it is transferred to " partition " state, i.e. the first air heat-exchange stove 3
Smoke inlet valve 22 and exhanst gas outlet valve 23 are closed, and the air inlet valve 24 and air outlet valve 25 are still in closed mode.
At the same time, the second air heat-exchange stove 4 is in " air-supply " state, the smoke inlet valve 22 of the second air heat-exchange stove 4
It is closed with exhanst gas outlet valve 23, the air inlet valve 24 and air outlet valve 25 of the second air heat-exchange stove 4, which are in, to be opened
State is opened, air enters from the regenerative chamber lower part of the second air heat-exchange stove 4, is arranged after regenerative chamber is heated by checker brick from vault
Go out, carried out into hot-blast stove 5 combustion-supporting.
Before the second air heat-exchange stove 4 completes " to blow " program, the first air heat-exchange stove 3 has been completed " to separate "（Cut
Change valve）Program, is transferred to " air-supply " state, meanwhile, the second air heat-exchange stove 4 is transferred to " partition " state from " air-supply " state, the
One air heat-exchange stove 3 and the second air heat-exchange stove 4 replace " air-supply ", that is, it is continuous to realize the regenerative type air heat exchanger
Work.
Fig. 3 shows the heat regenerator system working system schematic diagram.The figure illustrates heat regenerator
Working system.
It will be recognized by those skilled in the art, can be to above-mentioned on the premise of without departing from protection scope of the present invention
Embodiment carries out various modifications, change and combination, and thinks that this modification, change and combination are the models in originality thought
Within enclosing.
Claims (10)
1. a kind of regenerative heat-exchange stove, including regenerative chamber and vault, it is characterised in that vault be arranged on regenerative chamber top and with storage
Hot cell communicates, and heat storage is provided with regenerative chamber, and gas inlet and hot-blast outlet are provided with vault, and regenerative chamber lower part is provided with
Cold wind import and exhanst gas outlet, the heat transfer process of regenerative heat-exchange stove include two stages：In the heating period, heat smoke is from flue gas
Import enters regenerative chamber, is discharged after heat storage body from exhanst gas outlet；In the air-supply stage, cold wind enters storage from cold wind import
Hot cell, is discharged after being heated by heat storage from hot-blast outlet.
2. a kind of regenerative heat-exchange stove as claimed in claim 1, it is characterised in that the bottom of the regenerative chamber is provided with support
The fire grate of heat storage.
3. a kind of regenerative heat-exchange stove as claimed in claim 1, it is characterised in that the heat storage is made of refractory material
Flame-proof sphere made of polyhedron checker brick or refractory material with clear opening.
4. a kind of regenerative heat-exchange stove as claimed in claim 1, it is characterised in that regenerative chamber is surrounded by furnace shell, and furnace shell is by gold
Belong to shell and the thermal insulation material being arranged on metal shell inner wall composition.
5. a kind of regenerative heat-exchange stove as claimed in claim 1, it is characterised in that the vault is hollow cone or four
Pyramidal shape.
A kind of 6. heat regenerator, it is characterised in that including the regenerative heat-exchange stove described at least two claims 1, its
In a regenerative heat-exchange stove with thermal current heat storage body when, the heat storage heating of another regenerative heat-exchange stove heat is cold
Wind；Two regenerative heat-exchange stoves alternately heat storage body and heating cold wind, realize the laser heating to cold wind.
7. a kind of hot-blast stove flue gas residual-heat utilization method, it is characterised in that changed using the heat accumulating type described in two groups of claims 6
Hot device is carried out at the same time combustion air and coal gas preheating using hot-blast stove high-temperature waste flue gas, and it is empty that one of which is used for preheated-combustion-supporting
Gas, another set are used for preheating gas, and the heat regenerator for gas preheating carries nitrogen purging device, is changed in heat accumulating type
First regenerative heat-exchange stove is purged before hot stove heating gas.
8. hot-blast stove flue gas residual-heat utilization method as claimed in claim 7, it is characterised in that two of heat regenerator
The step of regenerative heat-exchange stove is according to heating → partition → air-supply alternately reciprocal operation, wherein a regenerative heat-exchange stove is in and adds
When heat, partition state, in addition a regenerative heat-exchange stove is in the air-supply stage.
9. hot-blast stove flue gas residual-heat utilization method as claimed in claim 8, it is characterised in that the accumulation of heat for preheating gas
Formula heat exchanger carries out nitrogen purging in partition state.
10. hot-blast stove flue gas residual-heat utilization method as claimed in claim 7, it is characterised in that adjusted by the way of mixed wind
Heated combustion air and gas temperature, keeps combustion air and gas temperature into hot-blast stove constant.
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| CN201711098987.5A CN107904344A (en) | 2017-11-09 | 2017-11-09 | A kind of heat regenerator and hot-blast stove flue gas residual-heat utilization method |
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| CN201711098987.5A CN107904344A (en) | 2017-11-09 | 2017-11-09 | A kind of heat regenerator and hot-blast stove flue gas residual-heat utilization method |
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