CN207567264U - A kind of regenerative heat-exchange stove and heat regenerator - Google Patents
A kind of regenerative heat-exchange stove and heat regenerator Download PDFInfo
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- CN207567264U CN207567264U CN201721487771.3U CN201721487771U CN207567264U CN 207567264 U CN207567264 U CN 207567264U CN 201721487771 U CN201721487771 U CN 201721487771U CN 207567264 U CN207567264 U CN 207567264U
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Abstract
The utility model provides a kind of regenerative heat-exchange stove and heat regenerator, the device 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 utility model is related to a kind of flue gas residual heat using devices.
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 does not meet discharge standard yet, because
This usually can all utilize residual-heat utilization technology recovery waste heat in engineering, and most common technology is dividing wall type heat exchanger.So-called
The basic functional principle of wall type heat exchanger is hot and cold two kinds of fluids（Such as two kinds of hot and cold gas）By one layer of solid wall surface（Pipe or plate）
It separates, does not mix, heat exchange is carried out by partition, dividing wall type heat exchanger is suitble to apply at lower pressures, and general
It should not be in high temperature applicationss application.In order to avoid heat exchange equipment is made to be chronically in acidic environment, the flue gas discharge of heat exchanger
Temperature is generally higher 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, about 250 DEG C ~ 300 DEG C of the flue gas mean temperature discharged from hot-blast stove lower part, 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, heat-pipe heat exchanger applicating history is longer, quantity is also 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 condensation, 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 by heat pipe wall, and boiling and evaporation, are changed into steam after medium heat absorption；Steam exists
Cold side, the cooling of managed outer cryogenic gas are risen under the action of pressure difference, steam condenses and releases the latent heat of vaporization, low temperature outward
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 have high thermal conductivity, good isothermal, cold and hot both sides heat transfer area
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, blast furnace gas dust impurities are more complicated, gas flow is big,
Pressure is low, flow velocity is low etc., under this working condition, the drawbacks of heat exchange of heat pipe is put into practice engineering verification there are some,
Such as Large Heat Tube Exchanger basically can not disassembly, cleaning, in preheating gas, heat pipe can be polluted by gas dust, generate
Fouling influences heat transfer effect, and the service life is generally 5-8；In addition, as big blast-furnace technique develops, large-scale blast furnace hot blast stove gives up cigarette
Throughput 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 channel is formed between various plates, heat exchange is carried out by plate.Working fluid is in two boards
It is flowed through in the narrow and tortuous channel formed between piece.Cold fluid and hot fluid passes sequentially through runner, and there is an interlayer plate in centre by fluid
It separates, and passes through this plate and exchange heat.
The plate heat exchanger applied in blast funnace hot blast stove field of waste heat utilization be by heat transferring plate, gasket seal, pressure plate,
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 channel, 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 several times higher than heat exchange of heat pipe, and because disassembling cleaning, service life are longer（8-10）, therefore with preferable application
Prospect.
With various shell-and-tube heat exchangers（Including heat exchange of heat pipe）It compares, the major advantage of plate heat exchanger includes：1st, it changes
The thermal efficiency is high, and 2, floor space and occupied space are smaller, 3, easy to clean, convenient for disassembly and assembly, 4, service life it is long.
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
It is isolated, therefore there are some potential safety problems by the stainless steel heat transfer plate of multi-disc 1-2mm thickness, in addition, due to plate heat exchanger
For heat transferring plate because being suppressed using stainless steel plate, price is far above heat exchange of heat pipe, affects this technology in blast funnace hot blast stove
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, safety 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.
Utility model content
For the above-mentioned prior art the problem of, the utility model provide a kind of regenerative heat-exchange stove and heat accumulating type
Heat exchanger can not only obtain the heat transfer effect more more stable than existing residual-heat utilization technology, but also substantially improve flue gas
The stability and service life of residual heat using device extend the application range of heat storage exchanging apptss.
To achieve these goals, the technical solution of the utility model is as follows：
A kind of regenerative heat-exchange stove, including regenerative chamber and vault, vault is arranged on regenerative chamber top and is communicated with regenerative chamber,
Heat storage is provided in regenerative chamber, gas inlet and hot-blast outlet are provided on vault, 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 enters from gas inlet
It is discharged after heat storage body from exhanst gas outlet in regenerative chamber；In the air-supply stage, cold air enters regenerative chamber from cold wind import,
It is discharged after being heated by heat storage 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 cigarette
During gas heat storage body, the heat storage heating cold wind of another regenerative heat-exchange stove heat；Two parts regenerative heat-exchange stove replaces
Heat storage body and heating cold wind are carried out, realizes the laser heating to cold wind.
The technique effect that the utility model has：
1st, heat regenerator is formed by one group and at least by two regenerative heat-exchange stoves, two regenerative heat-exchange stove alternatings
Heat storage checker brick in regenerative furnace are heated and cooled down, so as to fulfill the laser heating to cold wind.
, 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 using heat smoke and cold wind while across heat storage checkerwork cell directly with heat storage carry out
Heat exchange, in the form of convective heat exchange based on, heat exchange efficiency is high, and resistance damage is small, and will not inside heat storage dust accumulation.
, heat exchanging furnace body do not needed to using heat regenerator safeguarded, therefore reduce afterheat utilizing system
Maintenance cost.
Description of the drawings
By below in conjunction with the accompanying drawings to the embodiment of the utility model carry out description, the technical solution of the utility model and
Its technique effect will become clearer, and more easily understand.
Regenerative heat-exchange stove schematic diagram in Fig. 1-the utility model embodiment 1；
Regenerative type air coal gas heat-exchange system composition figure in Fig. 2-the utility model embodiment 2；
Regenerative type air coal gas heat-exchange system working system schematic diagram in Fig. 3-the utility model embodiment 2.
Wherein：
Regenerative heat-exchange stove 101, vault 102, regenerative chamber 103, heat storage 104, fire grate 105, gas inlet pipeline
106, hot-blast 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 wind
Stove group 5, chimney 6, breaching 7, nitrogen packet 8, gas main 9, air header 10, coal gas recuperative furnace smoke inlet valve 11, coal
Gas recuperative furnace exhanst gas 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 is total
Pipe 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 are empty
Gas recuperative furnace air inlet valve 24, air heat-exchange stove air outlet valve 25.
Specific embodiment
Explanation and specific embodiment are further described the utility model 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 vault 102 and regenerative chamber
103 compositions, vault 102 are arranged on 103 top of regenerative chamber and are communicated with regenerative chamber 103, and regenerative chamber 103 is surrounded by furnace shell 110,
The shape of regenerative chamber 103 can also be rectangular for circle, and furnace shell 110 is by metal shell and is arranged on the resistance to of metallic steel housings
Fiery material insulating layer composition, refractory material insulating layer can be refractory brick or the spray paint with heat insulation effect.
The shape of vault 102 can have the conical structure of cavity or tetragonous vertebral body structure, 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 shelved on grating, accumulation of heat
Body 104 is made of refractory material, can be the polyhedron checker brick or flame-proof sphere for having multiple clear openings, in this reality
Heat storage 104 in example is applied to form using grid brick masonry.
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
Become 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 are can be used, at least two
Regenerative heat-exchange stove is divided into two groups, while one of which regenerative heat-exchange stove 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 gas preheating system, which utilizes the useless cigarette of blast funnace hot blast stove
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 packet 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 packet 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.
There are three types of working conditions for the heat regenerator：" 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 flue gas of the first coal gas recuperative furnace 1
Outlet valve 12 is in opening, and gas entry valve 13 and gas exit valve 14 are closed, and hot-blast stove group 5 generates useless
Flue gas enters the first coal gas recuperative furnace 1 through breaching 7, enters the first coal gas recuperative furnace from the vault of the first coal gas recuperative furnace 1
1, the checker brick in regenerative chamber are heated.
After the first coal gas recuperative furnace 1 is completed " 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 are still in closed state, at this point, opening
The outlet stop valve 15 that nitrogen packet 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 to the first coal gas recuperative furnace 1, and purged waste nitrogen gas is discharged through exhanst gas outlet diffusion valve 16.
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 is completed " 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 state.
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, burn into hot-blast stove 5.
Before the second air heat-exchange stove 4 completes " to blow " program, the first air heat-exchange stove 3 has been completed " to separate "（It cuts
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 regenerators
Working system.
It will be recognized by those skilled in the art, can be right under the premise of without departing from the scope of protection of the utility model
The above embodiment is carry out various modifications, changes and is combined, and thinks that this modification, variation and combination are in originality thought
Within the scope of.
Claims (6)
1. a kind of regenerative heat-exchange stove, including regenerative chamber and vault, which is characterized in that vault be arranged on regenerative chamber top and with storage
Hot cell communicates, and heat storage is provided in regenerative chamber, and gas inlet and hot-blast outlet are provided on 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 is entered in regenerative chamber and is discharged after heat storage body from exhanst gas outlet；In the air-supply stage, cold wind is entered from cold wind import
Regenerative chamber is discharged after being heated by heat storage from hot-blast outlet.
2. a kind of regenerative heat-exchange stove as described in claim 1, which is characterized 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 described in claim 1, which is characterized 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 described in claim 1, which is characterized 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 described in claim 1, which is characterized in that the vault is hollow cone or four
Pyramidal shape.
6. a kind of heat regenerator, which is characterized in that including two regenerative heat-exchange stoves described in claim 1, wherein one
During seat regenerative heat-exchange stove thermal current heat storage body, the heat storage heating cold wind of another regenerative heat-exchange stove heat；Two
Part regenerative heat-exchange stove alternately heat storage body and heating cold wind, realize the laser heating to cold wind.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721487771.3U CN207567264U (en) | 2017-11-09 | 2017-11-09 | A kind of regenerative heat-exchange stove and heat regenerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721487771.3U CN207567264U (en) | 2017-11-09 | 2017-11-09 | A kind of regenerative heat-exchange stove and heat regenerator |
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| Publication Number | Publication Date |
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| CN207567264U true CN207567264U (en) | 2018-07-03 |
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ID=62693010
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| CN201721487771.3U Active CN207567264U (en) | 2017-11-09 | 2017-11-09 | A kind of regenerative heat-exchange stove and heat regenerator |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107904344A (en) * | 2017-11-09 | 2018-04-13 | 北京卡卢金热风炉技术有限公司 | A kind of heat regenerator and hot-blast stove flue gas residual-heat utilization method |
-
2017
- 2017-11-09 CN CN201721487771.3U patent/CN207567264U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107904344A (en) * | 2017-11-09 | 2018-04-13 | 北京卡卢金热风炉技术有限公司 | A kind of heat regenerator and hot-blast stove flue gas residual-heat utilization method |
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