CN108707713A - A kind of hot-blast stove attemperator and method - Google Patents
A kind of hot-blast stove attemperator and method Download PDFInfo
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- CN108707713A CN108707713A CN201810636017.4A CN201810636017A CN108707713A CN 108707713 A CN108707713 A CN 108707713A CN 201810636017 A CN201810636017 A CN 201810636017A CN 108707713 A CN108707713 A CN 108707713A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
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Abstract
The invention discloses a kind of hot-blast stove attemperator and methods, belong to technical field of blast furnace ironmaking.The hot-blast stove attemperator includes：Manhole is offered on cold air duct, regulating valve is provided on cold air duct, and the output end of cold air duct is connected to hot wind furnace bottom；It is connected at the top of the input terminal of hot air duct and hot-blast stove, hot air duct is removably provided with closure plate with blast furnace connectivity part；The input terminal for flowing backwards damping down pipeline is connected to hot air duct, and the input terminal for flowing backwards damping down pipeline is arranged between the first shut-off valve and closure plate；First temperature detector is arranged in the flue of hot-blast stove, and the first temperature detector is connect with controller；Second temperature detector is arranged in hot air duct, and second temperature detector is connect with the controller.Hot-blast stove attemperator of the present invention and method are easy to operate, and plant maintenance amount is small, and fast and efficiently high wind-warm syndrome can be provided for blast furnace when realizing safe efficient, energy-efficient hot-blast stove long-term heat preservation operation, and resuming production.
Description
Technical field
The present invention relates to technical field of blast furnace ironmaking, more particularly to a kind of hot-blast stove attemperator and method.
Background technology
Blast furnace during normal production, air blast needed for blast furnace is provided by high-power blast furnace blower, cold wind pass through hot wind
Be heated up after stove accumulation of heat checker brick, then successively through hot-blast main, hot wind endless tube, gooseneck, blowpipe, subsequently into blast furnace.
When blast furnace needs long term blowing-down because of reasons such as medium-capital overhauling, stewing stoves, in order to ensure resistance to material and flue fire grate in hot-blast stove
Can hot wind promptly be provided for blast furnace in time when the service life and production restoration of son, need to carry out heat preservation behaviour to hot-blast stove
Make.Hot-blast stove heat preservation operation includes mainly two parts, is on the one hand to avoid hot wind furnace roof temperature too low by burning stove heat, another party
Face is to prevent flue temperature excessively high by cooling of blowing.
And it is by the traditional operation mode that cooling prevents flue temperature excessively high of blowing：
Barricade mode is built in generally use hot air duct and separates blast furnace and supply air system, is disappeared to reduce electricity when in addition blowing
Consumption, required cold wind are alloted by other blast furnaces or add the mode of temporary pipeline access cold air duct by combustion fan to ensure.But
It is that such mode is not only constructed and plant maintenance amount is big, but also needs continually to carry out burning stove, pushing wind manipulation, coal gas and electricity
Consumption is big, and blast fumance promptly can not provide high wind-warm syndrome for blast furnace in time after restoring.
Invention content
A kind of hot-blast stove attemperator of present invention offer and method, solve or part solves heat preservation behaviour in the prior art
Cold wind needed for making is alloted by other blast furnaces or adds the mode of temporary pipeline access cold air duct by combustion fan to ensure, causes
Construction and plant maintenance amount are big, and resource consumption is big, and blast fumance promptly can not provide high wind-warm syndrome for blast furnace in time after restoring
The technical issues of.
In order to solve the above technical problems, the present invention provides a kind of hot-blast stove attemperator, it is connected to blast furnace, the hot wind
Stove attemperator includes：Cold air duct, hot air duct, flow backwards damping down pipeline, the first temperature detector, second temperature detector and
Controller；Manhole is offered on the cold air duct, and regulating valve, the output of the cold air duct are provided on the cold air duct
End is connected to the hot wind furnace bottom；It is connected at the top of the input terminal of the hot air duct and the hot-blast stove, the hot air duct
Output end be connected to the blast furnace, the hot air duct and the blast furnace connectivity part are removably provided with closure plate, the heat
The first shut-off valve is provided on wind pipeline；The input terminal for flowing backwards damping down pipeline is connected to the hot air duct, the refluence
The height of the output end of damping down pipeline is higher than the height of the input terminal for flowing backwards damping down pipeline, described to flow backwards the defeated of damping down pipeline
Enter end to be arranged between first shut-off valve and the closure plate, the second shut-off valve is provided on the refluence damping down pipeline；Institute
It states the first temperature detector to be arranged in the flue of the hot-blast stove, first temperature detector is connect with the controller；
The second temperature detector is arranged in the hot air duct, and the second temperature detector is connect with the controller；Institute
Controller is stated to connect with the regulating valve, the controller receive the first temperature signal that first temperature detector is sent and
The second temperature signal that the second temperature detector is sent, according to the first temperature signal and second temperature signal to the adjusting
Valve sends opening amount signal.
Further, the hot-blast stove attemperator further includes：Pressure-equalizing passageway and equalizing valve；It is arranged on the pressure-equalizing passageway
The equalizing valve；The input terminal and output end of the pressure-equalizing passageway are connected to the cold air duct；The pressure-equalizing passageway it is defeated
Enter end to be arranged between the manhole and regulating valve, the output end of the pressure-equalizing passageway is arranged in the regulating valve and the hot wind
Between stove.
Further, the hot-blast stove attemperator further includes：The stove in the hot-blast stove is arranged in third temperature detector
Top, the third temperature detector are connect with the controller, and the third temperature detector sends third to the controller
Temperature signal, the controller control the heating power of the furnace roof of the hot-blast stove according to third temperature signal.
Further, the closure plate is made of asbestic blanket and iron plate.
Further, the hot-blast stove attemperator further includes：Air blower and air supply duct；The input of the air supply duct
End is connected to the air blower, and the output end of the air supply duct is connected to the input terminal of the cold air duct, the ajutage
Third shut-off valve is provided on road；The output end of the air supply duct and the input terminal connectivity part of the cold air duct are dismountable
It is provided with blind plate.
Based on identical inventive concept, the present invention also provides a kind of hot-blast stove heat preserving methods to include the following steps：To hot wind
The furnace roof of stove is heated, while closure plate is arranged in hot air duct and blast furnace connectivity part；Open regulating valve, the first shut-off valve and the
Two shut-off valves；Natural wind is delivered in the flue of hot-blast stove by the air inlet opened up on cold air duct；Take away hot-blast stove
The input terminal that the natural wind of flue heat enters refluence damping down pipeline by hot air duct enters the output end for flowing backwards damping down pipeline
Discharge, the height of the output end for flowing backwards damping down pipeline are higher than the height of the input terminal for flowing backwards damping down pipeline；First temperature
First temperature signal of the flue of hot-blast stove is sent to controller by degree detector, and second temperature detector is by the of hot air duct
Two temperature signals are sent to controller, and controller sends aperture according to the first temperature signal and second temperature signal to regulating valve to be believed
Number；By controlling to adjust the air output of the aperture regulation cold air duct of valve, and then control the flue and hot air duct of hot-blast stove
Temperature.
Further, described to include in hot air duct and blast furnace connectivity part setting closure plate：It is remaining in blast furnace when needing to be discharged
When coal gas, the first shut-off valve is closed, closure plate is withdrawn from by hot air duct and blast furnace connectivity part, the remaining coal gas in the blast furnace is logical
It crosses hot air duct and enters the discharge of damping down pipeline；After remaining coal gas discharge in blast furnace, closure plate is inserted into hot air duct and height
Stove connectivity part opens the first shut-off valve.
Further, the flue of the control hot-blast stove and the temperature of hot air duct include：The flue temperature of the hot-blast stove
Degree control is at 200-280 DEG C；The temperature of the hot air duct is controlled at 400-600 DEG C.
Further, the hot-blast stove heat preserving method further includes：Third temperature is arranged on the furnace roof of the hot-blast stove to examine
Survey device；The third temperature signal of the furnace roof of the hot-blast stove is sent to the controller by the third temperature detector, described
Controller controls the heating power of the furnace roof of the hot-blast stove according to third temperature signal, controls the top temperature of the hot-blast stove
At 800-1300 DEG C.
Further, the hot-blast stove heat preserving method further includes：When blast furnace maintenance, air supply duct output end with it is cold
Blind plate is arranged in the input terminal connectivity part of wind pipeline；After blast furnace maintenance, manhole and the second shut-off valve are closed, by closure plate by heat
Wind pipeline is withdrawn from blast furnace connectivity part, starts air blower, opens third shut-off valve, and the wind that air blower blasts passes sequentially through ajutage
Road and cold air duct enter in hot-blast stove, are delivered in blast furnace by hot air duct after the hot wind stove heat.
One or more technical solutions provided in the embodiments of the present application have at least the following technical effects or advantages：
Since the furnace roof to hot-blast stove heats, while in hot air duct and blast furnace connectivity part, closure plate is set, so, heat
Hot wind is had in wind furnace and hot air duct, the negative pressure that hot wind can generate in hot air duct is opened due to opening on cold air duct
If manhole, regulating valve, the first shut-off valve and the second shut-off valve, so, under the action of negative pressure, natural wind can pass through cold wind
Natural wind is delivered in the flue of hot-blast stove by the manhole opened up on pipeline, so, natural wind is taken away in the flue of hot-blast stove
Heat, due to take away hot-blast stove flue heat natural wind by hot air duct enter flow backwards damping down pipeline input terminal enter
The output end discharge for flowing backwards damping down pipeline flows backwards the height of the output end of damping down pipeline higher than the input terminal for flowing backwards damping down pipeline
Highly, it so, can cool down to flue, external device not needed, while convenient for forming negative pressure, due to the first temperature detection
First temperature signal of the flue of hot-blast stove is sent to controller by device, and second temperature detector is by the second temperature of hot air duct
Signal is sent to controller, and controller sends opening amount signal according to the first temperature signal and second temperature signal to regulating valve, leads to
The air output for the aperture regulation cold air duct for controlling to adjust valve is crossed, and then controls the flue of hot-blast stove and the temperature of hot air duct,
So, it is ensured that the flue of hot-blast stove and the temperature of hot air duct will not lead to equipment damage in suitable range, operation
Simply, plant maintenance amount is small, can be fast when realizing safe efficient, energy-efficient hot-blast stove long-term heat preservation operation, and resuming production
Speed efficiently for blast furnace provides high wind-warm syndrome.
Description of the drawings
Fig. 1 is the structural schematic diagram of hot-blast stove attemperator provided in an embodiment of the present invention.
Specific implementation mode
Referring to Fig. 1, a kind of hot-blast stove attemperator provided in an embodiment of the present invention is connected to blast furnace 13, and the hot-blast stove is protected
Warm device includes：Cold air duct 2, flows backwards damping down pipeline 16, the first temperature detector 6, second temperature detector at hot air duct 10
11 and controller.
Manhole 1 is offered on cold air duct 2, and regulating valve 3, output end and the heat of cold air duct 2 are provided on cold air duct 2
4 bottom of wind furnace is connected to.
The input terminal of hot air duct 10 is connected to 4 top of hot-blast stove, and the output end of hot air duct 10 is connected to blast furnace 13, heat
Wind pipeline 10 is removably provided with closure plate 12 with 13 connectivity part of blast furnace, and the first shut-off valve 9 is provided on hot air duct 10.
The input terminal for flowing backwards damping down pipeline 16 is connected to hot air duct 10, and the height for flowing backwards the output end of damping down pipeline 16 is high
In the height for the input terminal for flowing backwards damping down pipeline 16, the input terminal for flowing backwards damping down pipeline 16 is arranged in the first shut-off valve 9 and closure plate
Between 12, flows backwards and be provided with the second shut-off valve 15 on damping down pipeline 16.
First temperature detector 6 is arranged in the flue 5 of hot-blast stove 4, and the first temperature detector 6 is connect with controller.
Second temperature detector 11 is arranged in hot air duct 10, and second temperature detector 11 is connect with controller.
Controller is connect with regulating valve 3, and controller receives the first temperature signal and second that the first temperature detector 6 is sent
The second temperature signal that temperature detector 11 is sent is opened according to the first temperature signal and second temperature signal to the transmission of regulating valve 3
Spend signal.
The application specific implementation mode is since the furnace roof 7 to hot-blast stove 4 heats, while in hot air duct 10 and blast furnace
Closure plate 12 is arranged in 13 connectivity parts, so, have hot wind in hot-blast stove 3 and hot air duct 10, hot wind can be in hot air duct 10
The negative pressure of generation, due to opening the manhole 1, regulating valve 3, the first shut-off valve and 9 second shut-off valves 15 that are opened up on cold air duct 2,
And due to being hot wind in hot-blast stove 3 and hot air duct 10, so, under the action of negative pressure, natural wind can pass through cold air duct 2
On the manhole 1 that opens up natural wind is delivered in the flue 5 of hot-blast stove 4, so, natural wind is taken away in the flue 5 of hot-blast stove 4
Heat, the input for passing through the entrance refluence damping down of hot air duct 10 pipeline 16 due to taking away the natural wind of flue heat of hot-blast stove 4
The height of the output end of damping down pipeline 16 is flow backwards higher than refluence damping down pipeline into the output end discharge for flowing backwards damping down pipeline 16 in end
The height of 16 input terminal, so, it can cool down to flue 5, not need external device, while convenient for forming negative pressure, by
First temperature signal of the flue 5 of hot-blast stove 4 is sent to controller, second temperature detector 11 in the first temperature detector 6
The second temperature signal of hot air duct 10 is sent to controller, controller according to the first temperature signal and second temperature signal to
Regulating valve 3 sends opening amount signal, the air output of the aperture regulation cold air duct 2 by controlling to adjust valve 3, and then controls hot-blast stove
4 flue 5 and the temperature of hot air duct 10, so, it is ensured that the flue 5 of hot-blast stove 4 and the temperature of hot air duct 10 are being closed
In suitable range, equipment damage will not be led to, easy to operate, plant maintenance amount is small, realizes safe efficient, energy-efficient hot wind
Stove long-term heat preservation operates, and while resuming production fast and efficiently can provide high wind-warm syndrome for blast furnace.
Hot-blast stove attemperator of the present invention further includes：Pressure-equalizing passageway 17 and equalizing valve 18.
Equalizing valve 18 is set on pressure-equalizing passageway 17.The input terminal and output end of pressure-equalizing passageway 17 are connected to cold air duct 2.
The input terminal of pressure-equalizing passageway 17 is arranged between air inlet 1 and regulating valve 3, and the output end setting of pressure-equalizing passageway 17 exists
Between regulating valve 3 and hot-blast stove 4, ensure that the pressure at 3 both ends of regulating valve is identical, convenient for the adjusting of the aperture of regulating valve 3.
Hot-blast stove attemperator of the present invention further includes：Third temperature detector 8.
Third temperature detector 8 is fixed at the furnace roof 7 of hot-blast stove 4.Specifically, in the present embodiment, third temperature
Degree detector 8 is bolted the furnace roof 7 being arranged in hot-blast stove 4, and in other embodiments, third temperature detector 8 can
Such as pivot pin is fixed at the furnace roof 7 of hot-blast stove 4 otherwise.The present embodiment is not limited.
Third temperature detector 8 is connect with controller, and third temperature detector 8 sends third temperature signal to controller,
Controller controls the heating power of the furnace roof 7 of hot-blast stove 4 according to third temperature signal., avoid the 7 temperature mistake of furnace roof of hot-blast stove 4
Height damage equipment, also can avoid the too low subsequent air-supply of influence blast furnace of 7 temperature of furnace roof of hot-blast stove 4.
Wherein, the first temperature detector 6, second temperature detector 11 and third temperature detector 8 can be thermocouple.
The structure of closure plate 12 is discussed in detail.
Closure plate 12 is made of asbestic blanket and iron plate, can be with high temperature resistant, while playing the role of sealing.
Hot-blast stove attemperator further includes：Air blower 19 and air supply duct 20.
The input terminal of air supply duct 20 is connected to air blower 19, the input of the output end and cold air duct 2 of air supply duct 20
End is connected to, and is provided with third shut-off valve 21 on air supply duct 20, can be supplied blast furnace 13 after blast furnace 13 overhauls
Wind.
The output end of air supply duct 20 is removably provided with blind plate 22 with the input terminal connectivity part of cold air duct 2.
Based on identical inventive concept, the present invention also provides a kind of hot-blast stove heat preserving methods to include the following steps：
Step 1, the furnace roof 7 of hot-blast stove 4 is heated, while closure plate is set in hot air duct 10 and 13 connectivity part of blast furnace
12。
Step 2, regulating valve 3, the first shut-off valve 9 and the second shut-off valve 15 are opened.
Step 3, natural wind is delivered in the flue 5 of hot-blast stove 4 by the manhole 1 opened up on cold air duct 2.
Step 4, the natural wind for taking away 5 heat of flue of hot-blast stove 4 enters refluence damping down pipeline 16 by hot air duct 10
Discharge.
Step 5, the first temperature signal of the flue 5 of hot-blast stove 4 is sent to controller by the first temperature detector 6, and second
The second temperature signal of hot air duct 10 is sent to controller by temperature detector 11, and controller is according to the first temperature signal and
Two temperature signals send opening amount signal to regulating valve 3.
Step 6, by controlling to adjust the air output of the aperture regulation cold air duct 2 of valve 3, and then the cigarette of hot-blast stove 4 is controlled
The temperature in road 5 and hot air duct 10.
Step 1 is discussed in detail.
Include in hot air duct and blast furnace connectivity part setting closure plate：When needing that remaining coal gas in blast furnace 13 is discharged, close
First shut-off valve 9 is withdrawn from closure plate 12 by hot air duct 10 and 13 connectivity part of blast furnace, and the remaining coal gas in blast furnace 13 passes through hot wind
Pipeline 10, which enters, flows backwards 16 discharge of damping down pipeline；After remaining coal gas discharge in blast furnace 13, closure plate 12 is inserted into hot blast pipe
Road 10 and 13 connectivity part of blast furnace, open the first shut-off valve 9, the remaining coal gas in blast furnace 13 can be discharged, and ensure blast furnace 13
Safety.
Step 6 is discussed in detail.
The flue 5 of control hot-blast stove 4 and the temperature of hot air duct 10 include：5 temperature of flue of hot-blast stove 4 is controlled in 200-
280 DEG C, ensure the safety of the flue 5 of hot-blast stove 4；The temperature of hot air duct 10 is controlled at 400-600 DEG C, ensures hot air duct 10
And the safety of damping down pipeline 16.
Hot-blast stove heat preserving method of the present invention further includes：Third temperature detector 8 is set on the furnace roof 7 of hot-blast stove 4；Third
The third temperature signal of the furnace roof 7 of hot-blast stove 4 is sent to controller by temperature detector 8, and controller is according to third temperature signal
The heating power of the furnace roof of hot-blast stove 4 is controlled, 7 temperature of furnace roof of hot-blast stove 4 is controlled at 800-1300 DEG C, ensures hot-blast stove 4
Safety, avoids the excessively high damage equipment of 7 temperature of furnace roof of hot-blast stove 4, meanwhile, it also can avoid the too low shadow of 7 temperature of furnace roof of hot-blast stove 4
Ring the subsequent air-supply of blast furnace.
Hot-blast stove heat preserving method of the present invention further includes：When blast furnace 13 overhauls, in the output end and cold wind of air supply duct 20
Blind plate 22 is arranged in the input terminal connectivity part of pipeline 2, has effectively completely cut off hot-blast stove 4 and air blower 19, and hot-blast stove 4 is avoided to burn stove production
Raw coal gas scurries into 19 initiation accident of air blower.After blast furnace 13 overhauls, manhole 2 and the second shut-off valve 15 are closed, will be blocked up
Plate 12 is withdrawn from by hot air duct 10 and 13 connectivity part of blast furnace, starts air blower 19, opens third shut-off valve, what air blower 19 blasted
Wind passes sequentially through air supply duct 20 and cold air duct 2 enters in hot-blast stove 4, defeated by hot air duct 10 after the heating of hot-blast stove 4
It send to blast furnace 13, it is ensured that the process for sending hot wind to blast furnace carries out rapidly.
In order to become apparent from the embodiment of the present invention, introduced from the application method of the embodiment of the present invention below.
When blast furnace 13 needs long term blowing-down because of reasons such as medium-capital overhauling, stewing stoves, in the output end and cool air hose of air supply duct 20
Blind plate 22 is arranged in the input terminal connectivity part in road 2, meanwhile, the furnace roof 7 of hot-blast stove 4 is heated, on the furnace roof 7 of hot-blast stove 4
Third temperature detector 8 is set, and the third temperature signal of the furnace roof 7 of hot-blast stove 4 is sent to control by third temperature detector 8
Device, controller control the heating power of the furnace roof of hot-blast stove 4 according to third temperature signal, and 7 temperature of furnace roof of control hot-blast stove 4 exists
800-1300 DEG C, ensures the safety of hot-blast stove 4, avoid the excessively high damage equipment of 7 temperature of furnace roof of hot-blast stove 4, meanwhile, also it can avoid
The too low subsequent air-supply of influence blast furnace of 7 temperature of furnace roof of hot-blast stove 4.In hot air duct 10 and 13 connectivity part of blast furnace, closure plate is set
12, it is contacted with supply air system for completely cutting off blast furnace 13, it is ensured that supply air system safety avoids the hot wind of hot-blast stove 4 from entering blast furnace 13,
Maintenance or stewing stove to blast furnace 13 impact.
Regulating valve 3, the first shut-off valve and 9 second shut-off valves 15 are opened, and since the furnace roof of hot-blast stove 47 is being heated,
So having hot wind, the negative pressure that hot wind can generate in hot air duct 10 in hot-blast stove 3 and hot air duct 10.In the work of negative pressure
Under, natural wind is delivered in the flue 5 of hot-blast stove 4 by the manhole 1 opened up on cold air duct 2, due on cold air duct 2
Manhole 1 is inherently opened up, there is no need to the trepannings on cold air duct 2, ensure that the intensity of of cold air duct 2 itself.
Natural wind, which takes away the heat in the flue 5 of hot-blast stove 4, becomes hot wind, and hot wind is stopped by hot air duct 10 into refluence
Wind pipeline 16 is discharged, and can cool down to flue 5, not need external device, easy to operate, plant maintenance amount is small, realizes
The operation of safe efficient, energy-efficient hot-blast stove long-term heat preservation, and while resuming production fast and efficiently can provide high wind for blast furnace
Temperature.
First temperature signal of the flue 5 of hot-blast stove 4 is sent to controller, second temperature inspection by the first temperature detector 6
It surveys device 11 and the second temperature signal of hot air duct 10 is sent to controller, controller is according to the first temperature signal and second temperature
Signal sends opening amount signal to regulating valve 3, and the air output of the aperture regulation cold air duct 2 by controlling to adjust valve 3 passes through control
The air output of cold air duct 2 makes 5 temperature of flue of hot-blast stove 4 at 200-280 DEG C, it is ensured that the peace of the flue 5 of hot-blast stove 4
Entirely, make the temperature of hot air duct 10 at 400-600 DEG C, it is ensured that hot air duct 10 and the safety for flowing backwards damping down pipeline 16 are protected
The heat insulation effect of hot air duct 10 is demonstrate,proved, the temperature of the flue 5 and hot air duct 10 that make hot-blast stove 4, will not in suitable range
Lead to equipment damage.
When needing that remaining coal gas in blast furnace 13 is discharged, every 12 hours, the first shut-off valve 9 is closed, hot air duct is avoided
Hot wind in 10 enters blast furnace 13.Closure plate 12 is withdrawn from by hot air duct 10 and 13 connectivity part of blast furnace, the remaining coal in blast furnace 13
Gas enters damping down pipeline 16 by hot air duct 10 and is discharged, and remaining coal gas, which is discharged, after twenty minutes, in blast furnace 13 finishes, by closure plate 12
It is inserted into hot air duct 10 and 13 connectivity part of blast furnace, the first shut-off valve 9 is opened, the remaining coal gas in blast furnace 13 can be discharged, is protected
The safety for demonstrate,proving blast furnace 13 carries out forbidding burning and pushing wind manipulation when this operation.
Third temperature detector 8 is set on the furnace roof 7 of hot-blast stove 4, and third temperature detector 8 is by the furnace roof 7 of hot-blast stove 4
Third temperature signal be sent to controller, controller controls the heating power of the furnace roof of hot-blast stove 4 according to third temperature signal,
7 temperature of furnace roof of hot-blast stove 4 is controlled at 800-1300 DEG C, ensures the safety of hot-blast stove 4, avoids the 7 temperature mistake of furnace roof of hot-blast stove 4
Height damage equipment, meanwhile, it also can avoid the too low subsequent air-supply of influence blast furnace of 7 temperature of furnace roof of hot-blast stove 4.
After blast furnace 13 needs long term blowing-down because of reasons such as medium-capital overhauling, stewing stoves, manhole 1 and the second shut-off valve 15 are closed,
Closure plate 12 is withdrawn from by hot air duct 10 and 13 connectivity part of blast furnace, starts air blower 19, opens third shut-off valve 21, air blower 19
The wind blasted passes sequentially through air supply duct 20 and cold air duct 2 enters in hot-blast stove 4, passes through hot blast pipe after the heating of hot-blast stove 4
Road 10 is delivered in blast furnace 13, it is ensured that the process for sending hot wind to blast furnace carries out rapidly.
The application takes card blind plate 22 after third shut-off valve 21, and blast furnace and hot air duct 10 are blocked with adiabatic closure plate 12, will
Hot blast stove system separates with air blower 19 and blast furnace 13, and the cycle that security closed is created for hot-blast stove implementation heat preservation operation is empty
Between.Remaining coal gas 20 minutes in 12 pull pipeline of closure plate were opened under the premise of forbidding burning stove and pushing wind manipulation every 12 hours, into
One step improves hot blast stove system safety.In the embodiment of the present application, 7 temperature of furnace roof of hot-blast stove 4 is taken to be opened less than 800 DEG C
Begin to burn stove, 5 temperature of flue for stopping the combustion system burnt and hot-blast stove 4 higher than 1300 DEG C is more than 280 DEG C of putting in blasts, is less than
200 DEG C of out-of-blast blowing systems have achieved the purpose that reduce to greatest extent and have burnt stove and pushing wind manipulation number.In addition, will send
Temperature in air temperature, that is, hot air duct 10 is controlled at 400~600 DEG C, can ensure that refluence damping down pipeline 16 is safe to use
Meanwhile ensureing the heat insulation effect of hot air duct 10.The air inlet 1 for opening cold air duct, can be such that natural wind is inhaled from there through negative pressure
Enter, the mode alloted cold wind without other blast furnaces or add temporary pipeline access cold air duct by combustion fan supplies cold wind, solves
It has determined coal gas in the prior art and the big problem of electric quantity consumption, has realized efficient hot-blast stove heat preservation operation, and can be
When resuming production fast and efficiently high wind-warm syndrome is provided for blast furnace.
By taking 2650 cubic metres of blast furnaces of certain steel plant as an example, in order to ensure the resistance to material of hot-blast stove and cigarette during blast furnace blowing out in 49 days
Road fire grate safety, while ensureing quickly obtain high wind-warm syndrome when blast furnace resumes production, during blast furnace stopping in four
Burning type hot-air furnace implements the heat preservation operation of this patent hot-blast stove.The card blind plate 22 after its third shut-off valve 21, with adiabatic closure plate 12
Blast furnace and hot air duct 10 are blocked, hot blast stove system and air blower 19 and blast furnace 13 are separated, implements heat preservation operation for hot-blast stove
Create the cyclic space of security closed.12 draw-tube of closure plate was opened under the premise of forbidding burning stove and pushing wind manipulation every 12 hours
Remaining coal gas 20 minutes in road.4 furnace roof of hot-blast stove, 7 temperature starts to burn stove less than 800 DEG C, stops burning higher than 1300 DEG C.4 cigarette of hot-blast stove
5 temperature of road is more than 280 DEG C of putting in blasts, out-of-blast less than 200 DEG C.Open the air inlet 1 of cold air duct 2, hot-blast stove air-supply
The negative pressure draft that Shi Liyong hot winds generate in air supply duct reaches natural wind and is entered by refluence damping down valve by cold air duct manhole
Discharge is to reduce the purpose of hot-blast stove flue temperature.Air blast path is：Manhole → regulating valve → hot-blast stove of cold air duct →
The shut-off valve discharge of first shut-off valve valve → hot air duct → second.
This time during blast furnace stopping, hot-blast stove implements the heat preservation operation of " partial circulating " method, is ensureing resistance to material and cigarette in hot-blast stove
Under the premise of road fire grate safety, by the ignition times of every hot-blast stove by being reduced to once a week once a day, and hot-blast stove
Coordinate without combustion fan during air-supply, average daily gas saving 290,000 is vertical to save electricity 780KWh with igniting every time.In height
When stove resumes production, hot air furnace hot air temperature only just reached 800 DEG C or more with 35 minutes 2 hours.Production practices prove " small to follow
Ring " method hot-blast stove heat preservation safe operation is reliable, energy-efficient, can quickly and efficiently be provided for blast furnace when blast furnace resumes production
High wind-warm syndrome.
It should be noted last that the above specific implementation mode is merely illustrative of the technical solution of the present invention and unrestricted,
Although being described the invention in detail with reference to example, it will be understood by those of ordinary skill in the art that, it can be to the present invention
Technical solution be modified or replaced equivalently, without departing from the spirit of the technical scheme of the invention and range, should all cover
In the scope of the claims of the present invention.
Claims (10)
1. a kind of hot-blast stove attemperator, is connected to blast furnace, which is characterized in that the hot-blast stove attemperator includes：Cool air hose
Road, flows backwards damping down pipeline, the first temperature detector, second temperature detector and controller at hot air duct；
Manhole is offered on the cold air duct, and regulating valve, the output end of the cold air duct are provided on the cold air duct
It is connected to the hot wind furnace bottom；
It is connected at the top of the input terminal of the hot air duct and the hot-blast stove, the output end of the hot air duct connects with the blast furnace
Logical, the hot air duct is removably provided with closure plate with the blast furnace connectivity part, and first section is provided on the hot air duct
Only valve；
The input terminal for flowing backwards damping down pipeline is connected to the hot air duct, the height of the output end for flowing backwards damping down pipeline
Higher than the height of the input terminal for flowing backwards damping down pipeline, the input terminal setting for flowing backwards damping down pipeline is in first cut-off
Between valve and the closure plate, the second shut-off valve is provided on the refluence damping down pipeline；
First temperature detector is arranged in the flue of the hot-blast stove, first temperature detector and the controller
Connection；
The second temperature detector is arranged in the hot air duct, and the second temperature detector connects with the controller
It connects；
The controller is connect with the regulating valve, and the controller receives the first temperature that first temperature detector is sent
The second temperature signal that signal and the second temperature detector are sent, according to the first temperature signal and second temperature signal to institute
It states regulating valve and sends opening amount signal.
2. hot-blast stove attemperator according to claim 1, which is characterized in that the hot-blast stove attemperator further includes：
Pressure-equalizing passageway and equalizing valve；
The equalizing valve is set on the pressure-equalizing passageway；
The input terminal and output end of the pressure-equalizing passageway are connected to the cold air duct；
The input terminal of the pressure-equalizing passageway is arranged between the manhole and regulating valve, and the output end setting of the pressure-equalizing passageway exists
Between the regulating valve and the hot-blast stove.
3. hot-blast stove attemperator according to claim 1, which is characterized in that the hot-blast stove attemperator further includes：
The furnace roof in the hot-blast stove is arranged in third temperature detector, and the third temperature detector is connect with the controller,
The third temperature detector sends third temperature signal to the controller, and the controller is controlled according to third temperature signal
The heating power of the furnace roof of the hot-blast stove.
4. hot-blast stove attemperator according to claim 1, it is characterised in that：
The closure plate is made of asbestic blanket and iron plate.
5. hot-blast stove attemperator according to claim 1, which is characterized in that the hot-blast stove attemperator further includes：
Air blower and air supply duct；
The input terminal of the air supply duct is connected to the air blower, the output end of the air supply duct and the cold air duct
Input terminal is connected to, and third shut-off valve is provided on the air supply duct；
The output end of the air supply duct and the input terminal connectivity part of the cold air duct are removably provided with blind plate.
6. a kind of hot-blast stove heat preserving method, the hot-blast stove attemperator as described in claim 1-5 any one, feature exist
In including the following steps：
The furnace roof of hot-blast stove is heated, while closure plate is set in hot air duct and blast furnace connectivity part；
Open regulating valve, the first shut-off valve and the second shut-off valve；
Natural wind is delivered in the flue of hot-blast stove by the manhole opened up on cold air duct；
It takes away the natural wind of the flue heat of hot-blast stove and is entered by hot air duct and flow backwards the input terminal of damping down pipeline and enter refluence
The output end of damping down pipeline is discharged, and the height of the output end for flowing backwards damping down pipeline is higher than the input for flowing backwards damping down pipeline
The height at end；
First temperature signal of the flue of hot-blast stove is sent to controller by the first temperature detector, and second temperature detector will be warm
The second temperature signal of wind pipeline is sent to controller, and controller is according to the first temperature signal and second temperature signal to regulating valve
Send opening amount signal；
By controlling to adjust the air output of the aperture regulation cold air duct of valve, and then control the flue and hot air duct of hot-blast stove
Temperature.
7. hot-blast stove heat preserving method according to claim 6, which is characterized in that described in hot air duct and blast furnace connectivity part
Closure plate, which is arranged, includes：
When needing that remaining coal gas in blast furnace is discharged, the first shut-off valve is closed, closure plate is removed by hot air duct and blast furnace connectivity part
Go out, the remaining coal gas in the blast furnace is entered by hot air duct flows backwards the discharge of damping down pipeline；
After remaining coal gas discharge in blast furnace, closure plate is inserted into hot air duct and blast furnace connectivity part, opens the first shut-off valve.
8. hot-blast stove heat preserving method according to claim 6, which is characterized in that the flue and hot wind of the control hot-blast stove
The temperature of pipeline includes：
The flue temperature of the hot-blast stove is controlled at 200-280 DEG C；
The temperature of the hot air duct is controlled at 400-600 DEG C.
9. hot-blast stove heat preserving method according to claim 6, which is characterized in that the hot-blast stove heat preserving method further includes：
Third temperature detector is set on the furnace roof of the hot-blast stove；
The third temperature signal of the furnace roof of the hot-blast stove is sent to the controller, the control by the third temperature detector
Device processed controls the heating power of the furnace roof of the hot-blast stove according to third temperature signal, and the top temperature for controlling the hot-blast stove exists
800-1300℃。
10. hot-blast stove heat preserving method according to claim 6, which is characterized in that the hot-blast stove heat preserving method further includes：
When blast furnace maintenance, blind plate is set in the output end of air supply duct and the input terminal connectivity part of cold air duct；
After blast furnace maintenance, manhole and the second shut-off valve are closed, closure plate is withdrawn from by hot air duct and blast furnace connectivity part, is opened
Dynamic air blower, opens third shut-off valve, and the wind that air blower blasts passes sequentially through air supply duct and cold air duct enters in hot-blast stove,
It is delivered in blast furnace by hot air duct after the hot wind stove heat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810636017.4A CN108707713B (en) | 2018-06-20 | 2018-06-20 | Hot blast stove heat preservation device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810636017.4A CN108707713B (en) | 2018-06-20 | 2018-06-20 | Hot blast stove heat preservation device and method |
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| CN108707713A true CN108707713A (en) | 2018-10-26 |
| CN108707713B CN108707713B (en) | 2021-03-26 |
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| CN201810636017.4A Active CN108707713B (en) | 2018-06-20 | 2018-06-20 | Hot blast stove heat preservation device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111088411A (en) * | 2020-01-16 | 2020-05-01 | 邯郸钢铁集团有限责任公司 | Air convection heat preservation method for blast furnace hot blast stove |
| CN111647702A (en) * | 2020-06-16 | 2020-09-11 | 山东莱钢永锋钢铁有限公司 | Heat preservation method for braising furnace of hot blast stove |
| CN114645106A (en) * | 2022-03-28 | 2022-06-21 | 中天钢铁集团(南通)有限公司 | Heat preservation and air supply system and method for hot blast stove burning |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104232825A (en) * | 2014-09-02 | 2014-12-24 | 莱芜钢铁集团有限公司 | Thermal insulation method of silica brick hot blast stove |
| CN108004358A (en) * | 2017-12-27 | 2018-05-08 | 中冶京诚工程技术有限公司 | Control System of Airheater |
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2018
- 2018-06-20 CN CN201810636017.4A patent/CN108707713B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104232825A (en) * | 2014-09-02 | 2014-12-24 | 莱芜钢铁集团有限公司 | Thermal insulation method of silica brick hot blast stove |
| CN108004358A (en) * | 2017-12-27 | 2018-05-08 | 中冶京诚工程技术有限公司 | Control System of Airheater |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111088411A (en) * | 2020-01-16 | 2020-05-01 | 邯郸钢铁集团有限责任公司 | Air convection heat preservation method for blast furnace hot blast stove |
| CN111088411B (en) * | 2020-01-16 | 2022-03-25 | 邯郸钢铁集团有限责任公司 | Air convection heat preservation method for blast furnace hot blast stove |
| CN111647702A (en) * | 2020-06-16 | 2020-09-11 | 山东莱钢永锋钢铁有限公司 | Heat preservation method for braising furnace of hot blast stove |
| CN114645106A (en) * | 2022-03-28 | 2022-06-21 | 中天钢铁集团(南通)有限公司 | Heat preservation and air supply system and method for hot blast stove burning |
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| CN108707713B (en) | 2021-03-26 |
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Effective date of registration: 20210511 Address after: 025 Zhao'an street, Qian'an Economic Development Zone, Tangshan City, Hebei Province 064400 Patentee after: QIAN'AN IRON AND STEEL COMPANY OF SHOUGANG Corp. Address before: 100040 Shijingshan Road, Shijingshan District, Beijing Patentee before: BEIJING SHOUGANG Co.,Ltd. |
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