CN108004358A - Hot blast stove control system - Google Patents
Hot blast stove control system Download PDFInfo
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- CN108004358A CN108004358A CN201711448003.1A CN201711448003A CN108004358A CN 108004358 A CN108004358 A CN 108004358A CN 201711448003 A CN201711448003 A CN 201711448003A CN 108004358 A CN108004358 A CN 108004358A
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- 238000002485 combustion reaction Methods 0.000 claims abstract description 33
- 238000012806 monitoring device Methods 0.000 claims abstract description 32
- 230000001105 regulatory effect Effects 0.000 claims abstract description 12
- 239000007789 gas Substances 0.000 claims description 89
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 claims description 46
- 239000003546 flue gas Substances 0.000 claims description 46
- 238000009423 ventilation Methods 0.000 claims description 35
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 28
- 238000010926 purge Methods 0.000 claims description 20
- 229910052757 nitrogen Inorganic materials 0.000 claims description 14
- 239000002737 fuel gas Substances 0.000 claims description 12
- 239000000567 combustion gas Substances 0.000 claims description 9
- 238000012544 monitoring process Methods 0.000 claims description 7
- 230000005540 biological transmission Effects 0.000 claims description 3
- 208000011580 syndromic disease Diseases 0.000 description 12
- 238000005338 heat storage Methods 0.000 description 6
- 230000009471 action Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 2
- 238000001514 detection method Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000002156 mixing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000009792 diffusion process Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000002000 scavenging effect Effects 0.000 description 1
- 230000002269 spontaneous effect Effects 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
Classifications
-
- 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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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Regulation And Control Of Combustion (AREA)
Abstract
The invention provides a hot blast stove control system which comprises three hot blast stove devices, a hot blast main pipe, a cold blast main pipe, a main temperature monitoring device and a cold blast valve control device, wherein the hot blast main pipe is connected with a blast furnace; each hot blast furnace device comprises a hot blast furnace, a hot blast pipeline, a cold blast pipeline, a hot blast furnace air supply temperature monitoring device and a cold blast regulating valve; the hot air pipeline is connected with the hot air furnace and the hot air main pipe; the cold air pipeline is connected with the hot air furnace and the cold air main pipe; the air supply temperature monitoring device of the hot blast stove monitors the air supply temperature of the hot blast stove; the cold air regulating valve is arranged on the cold air pipeline; two of the three hot blast stoves are in air supply state, and the other one is in combustion state; the total temperature monitoring device monitors the temperature of an air inlet of the blast furnace; the cold air valve control device is connected with the total temperature monitoring device, and a cold air regulating valve of each hot air furnace device and a hot air furnace air supply temperature monitoring device are used for regulating the cold air regulating valve according to the air supply temperature and the air inlet temperature. The invention can improve the efficiency of the heat accumulator of the hot blast stove.
Description
Technical field
The present invention relates to the blast funnace hot blast stove technical field of metallurgy industry, and in particular, to a kind of Control System of Airheater.
Background technology
Hot-blast stove is a kind of equipment for providing high temperature and pressure hot wind for blast furnace ironmaking production.In order to ensure the company of blast fumance
Continuous to carry out, blast furnace is commonly equipped with three or four hot-blast stoves, using " two, which burn one, send " or " two, which burn two, send " working system, to reach
The purpose of successive hot wind is provided to blast furnace.There is naturally unreasonable using " two, which burn one, send " working system in three hot-blast stoves
Property：1. the blast furnace feeding wind-warm syndrome stablized in order to obtain, when single seat hot-blast stove is blown, it is necessary to cold wind is mixed into hot air duct, is dropped
The low efficiency and blast furnace feeding wind-warm syndrome of hot-blast stove heat storage；2. the last temperature of single seat hot-blast stove air-supply have to be larger than or equal to setting
Blast furnace feeding wind-warm syndrome, air-supply time are restricted；3. the burning stove overlong time of single seat hot-blast stove distribution, in addition need stewing stove with etc.
Treat next air-supply, the whole efficiency of hot-blast stove is relatively low.4. since the air-supply time of single seat hot-blast stove is short, cause to change stove often,
Discharge amount of exhaust gas is big.
The content of the invention
The main purpose of the embodiment of the present invention is to provide a kind of Control System of Airheater, to obtain stable blast furnace feeding
Wind-warm syndrome, improves the efficiency of hot-blast stove heat storage, reduces changing-over stove discharge number.
To achieve these goals, the embodiment of the present invention provides a kind of Control System of Airheater, Control System of Airheater with
Blast furnace connects, including：
Three hot air furnace devices, hot-blast main, cold wind manifold, total moisture content monitoring device and cold wind valve control device, heat
Wind manifold is connected with blast furnace；
Every hot air furnace device includes：Hot-blast stove, hot air duct, cold air duct, hot-blast stove wind pushing temperature monitoring device
And cold air adjusting valve；
The first end connection hot-blast stove of hot air duct, the second end connection hot-blast main of hot air duct；
The first end connection hot-blast stove of cold air duct, the second end connection cold wind manifold of cold air duct；
Hot-blast stove wind pushing temperature monitoring device is arranged on hot air duct, for monitoring the wind pushing temperature of hot-blast stove；
Cold air adjusting valve is arranged on cold air duct, for adjusting the air quantity of cold wind；
Hot-blast stove is used for：Blown by hot air duct and hot-blast main to blast furnace, and by cold air duct reception come self cooling
The cold wind of wind manifold；Wherein two of three hot-blast stoves are in ventilation state, and another seat is in combustion state；
Total moisture content monitoring device is arranged on hot-blast main, for monitoring the air intake vent temperature of blast furnace；
Cold wind valve control device connects total moisture content monitoring device, and the cold air adjusting valve and heat of every hot air furnace device
Wind furnace wind pushing temperature monitoring device, is used for：
When the wind pushing temperature of wherein one hot-blast stove in ventilation state reaches preset value, wind pushing temperature is gradually reduced
Reach the aperture of the corresponding cold air adjusting valve of hot-blast stove of preset value, open and gradually increase the hot-blast stove pair for completing combustion state
The aperture for the cold air adjusting valve answered, closes the corresponding cold air adjusting valve of hot-blast stove that another seat is in ventilation state；
When air intake vent temperature is higher than preset value, reduce the corresponding cold air adjusting valve of two hot-blast stoves in ventilation state
Governing speed；When air intake vent temperature is less than preset value, two hot-blast stoves corresponding cold wind tune of the increase in ventilation state
Save the governing speed of valve.
In wherein a kind of embodiment, further include：
The hot wind stop valve being arranged on hot air duct, hot wind stop valve are opened when hot-blast stove is in ventilation state,
Hot-blast stove is closed when being in combustion state.
In wherein a kind of embodiment, further include：
The cold wind stop valve being arranged on cold air duct, the first of the second end connection cold air adjusting valve of cold wind stop valve
End, opens when hot-blast stove is in ventilation state, is closed when hot-blast stove is in combustion state.
In wherein a kind of embodiment, further include：
Cold wind pressure-equalizing passageway and the cold air pressure equalizing valve being arranged on cold wind pressure-equalizing passageway；
The both ends of cold wind pressure-equalizing passageway connect cold wind manifold and hot-blast stove respectively, and in parallel with cold air duct；
The first end of the first end connection cold wind stop valve of cold air pressure equalizing valve, the second end connection cold wind tune of cold air pressure equalizing valve
Save the second end of valve.
In wherein a kind of embodiment, further include：
Gas header pipe, air header and flue gas manifold；
Every hot air furnace device further includes：Gas pipeline, air pipeline and flue；
The first end connection gas header pipe of gas pipeline, the second end connection hot-blast stove of gas pipeline, for spontaneous combustion in future
The fuel gas transmission of gas manifold is to hot-blast stove；
The first end connection air header of air pipeline, the second end connection hot-blast stove of air pipeline, for sky will to be come from
The air of gas manifold is delivered to hot-blast stove；
The first end connection flue gas manifold of flue, the second end connection hot-blast stove of flue, for by the heat
The flue gas that wind furnace burning produces is delivered to the flue gas manifold.
In wherein a kind of embodiment, further include：
It is arranged on gas pipeline and the gas control valve close to hot-blast stove, the first gas cut off valve and the second combustion gas successively
Stop valve；
The second end of the first end connection gas control valve of first gas cut off valve, the second end of the first gas cut off valve connect
Connect the first end of the second gas cut off valve.
In wherein a kind of embodiment, further include：
Give out of gas and pipeline and be arranged at the fuel gas ventilation valve to give out of gas on pipeline；
The gas pipeline connection to give out of gas between pipeline and the first gas cut off valve and the second gas cut off valve, for inciting somebody to action
Control System of Airheater is discharged in combustion gas；
The second end of fuel gas ventilation valve connects the second end of the first gas cut off valve and the first end of the second gas cut off valve.
In wherein a kind of embodiment, further include：
Nitrogen header pipe, purging pipeline and the blow down valve being arranged on purging pipeline；
The first end connection nitrogen header pipe of pipeline is purged, the second end connection gas pipeline of pipeline is purged, for that will come from
The nitrogen of nitrogen header pipe is delivered to gas pipeline and hot-blast stove；
The second end of blow down valve connects second end, the first end of the second gas cut off valve and the combustion gas of the first gas cut off valve
The second end of diffusion valve.
In wherein a kind of embodiment, further include：
Flue gas row pressure pipeline, the flue gas stop valve being arranged on flue and the flue gas being arranged on flue gas row pressure pipeline
Purge valve；
The both ends of flue gas row pressure pipeline connect flue gas manifold and hot-blast stove respectively, and in parallel with flue；
The first end of the first end connection flue gas purge valve of flue gas stop valve, the second end connection flue gas row of flue gas stop valve
The second end of pressure valve.
In wherein a kind of embodiment, further include：
It is arranged on air pipeline and successively close to the air control valve and air cutoff valve of hot-blast stove；
The second end of the first end connection air control valve of air cutoff valve.
The Control System of Airheater of the embodiment of the present invention is connected with blast furnace, including three hot air furnace devices, hot-blast main, cold
Wind manifold, total moisture content monitoring device and cold wind valve control device, hot-blast main are connected with blast furnace；Every hot air furnace device is wrapped
Include：Hot-blast stove, hot air duct, cold air duct, hot-blast stove wind pushing temperature monitoring device and cold air adjusting valve；Hot-blast stove passes through hot wind
Pipeline and hot-blast main blow to blast furnace, and receive the cold wind from cold wind manifold by cold air duct；Three hot-blast stoves its
In two be in ventilation state, another seat is in combustion state；Hot-blast stove wind pushing temperature monitoring device is arranged on hot air duct,
For monitoring the wind pushing temperature of hot-blast stove；Cold air adjusting valve is arranged on cold air duct, for adjusting the air quantity of cold wind；Wherein,
Total moisture content monitoring device is arranged on hot-blast main, for monitoring the air intake vent temperature of blast furnace；Cold wind valve control device connects
Total moisture content monitoring device, and the cold air adjusting valve and hot-blast stove wind pushing temperature monitoring device of every hot air furnace device, with basis
Wind pushing temperature and air intake vent temperature adjustment cold air adjusting valve, so as to make the air-supply in parallel of two hot-blast stoves, are not improving hot wind chimney arch
Blast furnace feeding wind-warm syndrome is improved on the premise of pushing up temperature, extends single stove air-supply time, reduce hot-blast stove changes heat number, favorably
In the energy-saving and emission-reduction of blast fumance.Meanwhile cold wind is not mixed into hot air duct of the invention, improve the effect of hot-blast stove heat storage
Rate, is conducive to raising, stabilization and the hot-blast main's life-time dilatation of the air intake vent temperature of blast furnace.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, embodiment will be described below
Needed in attached drawing be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without creative efforts, can also be attached according to these
Figure obtains other attached drawings.
Fig. 1 is the structure diagram of Control System of Airheater in the embodiment of the present invention；
Fig. 2 is the air output of the hot-blast stove of Control System of Airheater and the graph of a relation of time in the embodiment of the present invention.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
In view of causing the whole efficiency of hot-blast stove relatively low using " two, which burn one, send " working system in currently available technology, blow
Time is short, cause to change stove often, discharge amount of exhaust gas it is big, the embodiment of the present invention provides a kind of Control System of Airheater and makes two heat
The air-supply in parallel of wind furnace heat, improves the efficiency of hot-blast stove heat storage, is improved on the premise of hot-blast stove dome temperature is not improved high
Stove enters stove wind-warm syndrome, extends single stove air-supply time, reduce hot-blast stove changes heat number, is conducive to the energy saving of blast fumance and subtracts
Row.Below in conjunction with attached drawing, the present invention is described in detail.
Fig. 1 is the structure diagram of Control System of Airheater in the embodiment of the present invention.As shown in Figure 1, Control System of Airheater
It is connected with blast furnace 1, including：Three hot air furnace devices, hot-blast main 151, cold wind manifold 152, total moisture content monitoring device 8 and cold wind
Valve control device 10.Wherein, hot-blast main 151 is connected with blast furnace 1.
Every hot air furnace device includes：Hot-blast stove 2, hot-blast stove wind pushing temperature monitoring device 9 and supply air system 5.Air-supply
System 5 further includes：Hot air duct 51, cold air duct 52 and cold air adjusting valve 521.Wherein, the first end connection of hot air duct 51
Hot-blast stove 2, the second end connection hot-blast main 151 of hot air duct 51；The first end connection hot-blast stove 2 of cold air duct 52, cold wind
The second end connection cold wind manifold 152 of pipeline 52.Hot-blast stove wind pushing temperature monitoring device 9 is arranged on hot air duct 51, is used for
Monitor the wind pushing temperature of hot-blast stove 2；Cold air adjusting valve 521 is arranged on cold air duct 52, for adjusting the air quantity of cold wind.Hot wind
Stove 2 is blown by hot air duct 51 and hot-blast main 151 to blast furnace 1, and is received by cold air duct 52 and come from cold wind manifold 152
Cold wind；
Wherein two of three hot-blast stoves 2 are in ventilation state, and another seat is in combustion state, can use top ignition
The multi-forms such as hot-blast stove, external combustion stove, internal combustion stove or pebble stove, the present invention are not limited thereto.
In embodiment, the air-supply of every hot-blast stove 2 is divided into two stages：Upper half way air-supply and the air-supply of lower half way.Every heat
The upper half way air-supply of wind furnace 2 is in parallel with the lower half way air-supply of leading stove, the upper half way air-supply phase of lower half way air-supply and rear row stove
It is in parallel.
Fig. 2 is the air output of the hot-blast stove of Control System of Airheater and the graph of a relation of time in the embodiment of the present invention.In Fig. 2
Transverse axis be the time, the longitudinal axis is air output.As shown in Fig. 2, when hot-blast stove 2 (hot-blast stove NO.1) is in the upper half way air-supply stage
When, leading stove (hot-blast stove NO.3) is in the lower half way air-supply stage, and rear row stove (hot-blast stove NO.2) is in combustion state；Work as hot wind
When stove 2 (hot-blast stove NO.1) is in the lower half way air-supply stage, rear row stove (hot-blast stove NO.3) is in the upper half way air-supply stage, in advance
Stove (hot-blast stove NO.3) is in combustion state.Two hot-blast stoves have been always maintained in the Control System of Airheater course of work in parallel connection
Air-supply, the 3rd hot-blast stove are in combustion state.
Wherein, total moisture content monitoring device 8 is arranged on hot-blast main 151, for monitoring the air intake vent temperature of blast furnace 1；It is cold
Air-valve controlling device for doors 10 connects total moisture content monitoring device 8, and the cold air adjusting valve 521 and hot-blast stove of every hot air furnace device
Wind pushing temperature monitoring device 9.
When it is implemented, ought wherein one in ventilation state hot-blast stove 2 wind pushing temperature (hot-blast stove wind pushing temperature supervise
Survey the detection temperature of device 9) when reaching preset value, cold wind valve control device 10 is gradually reduced wind pushing temperature and reaches preset value
The aperture of the corresponding cold air adjusting valve 521 of hot-blast stove 2, the hot-blast stove 2 opened and gradually increase completion combustion state are corresponding cold
The aperture of wind regulating valve 521, closes the corresponding cold air adjusting valve 521 of hot-blast stove 2 that another seat is in ventilation state.Wherein, it is complete
Hot-blast stove 2 into combustion state can switch to ventilation state.
As shown in Fig. 2, when the wind pushing temperature of hot-blast stove NO.3 reaches preset value T, the corresponding cold wind tune of hot-blast stove NO.3
The aperture maximum of valve 521 is saved, the air output of hot-blast stove NO.3 also reaches maximum, and cold wind valve control device 10 gradually subtracts at this time
The aperture of the corresponding cold air adjusting valve 521 of small hot-blast stove NO.3, hot-blast stove NO.3 enter the lower half way air-supply stage；Meanwhile cold wind
Valve control device 10 is also opened and gradually increase is in original place in the corresponding cold air adjusting valves of hot-blast stove NO.1 of combustion state
521 aperture, hot-blast stove NO.1 enter the upper half way air-supply stage；Original place is closed to correspond in lower half way air-supply stage hot-blast stove NO.2
Cold air adjusting valve 521, hot-blast stove NO.2 enters combustion state.Wherein, preset value T is blast furnace required temperature.
As shown in Fig. 2, t0、t1、t2... it is time point, hot-blast stove 2 is in the time in upper half way air-supply stage, is in down
The time in half way air-supply stage and the time in combustion state are Δ t, and combustion state is divided into three phases：Air-supply turns combustion
Burn, burn furnace period and burning transfer wind.T ' turns burning time section for air-supply, and t " transfers the wind stage for burning.
Every hot-blast stove 2 reduces trend in the hot blast temperature that ventilation state is sent out in gradual.During firm putting in blast, hot-blast stove
The 2 hot blast temperature highests sent out；When the aperture of the corresponding cold air adjusting valve 521 of hot-blast stove 2 is maximum, the heat of the submitting of hot-blast stove 2
Air temperature is the setting value T of blast furnace required temperature；At the end of air-supply, the hot blast temperature that hot-blast stove is sent out is minimum.
Before total moisture content monitoring device 8 is also located at the bustle pipe of blast furnace 1.Cold wind valve control device 10 is always according to air intake vent temperature
Deviation between blast furnace required temperature T, the cold air adjusting valve 521 of two hot-blast stoves 2 to blowing carry out aperture regulation.
When it is implemented, when air intake vent temperature (detection temperature of total moisture content monitoring device 8) is higher than preset value, cold wind Valve controlling dress
Put the governing speed that 10 reductions are in the corresponding cold air adjusting valve 521 of two hot-blast stoves 2 of ventilation state；When air intake vent temperature is low
When preset value, two hot-blast stoves 2 corresponding cold air adjusting valve 521 of the increase of cold wind valve control device 10 in ventilation state
Governing speed, to ensure the deviation between 1 required temperature T of the mixed temperature of hot wind and blast furnace that two hot-blast stoves 2 send out
No more than 5 DEG C.
In one embodiment, supply air system 5 further includes：The hot wind stop valve 511 being arranged on hot air duct 51, hot wind cut-out
Valve 511 is opened when hot-blast stove 2 is in ventilation state, is closed when hot-blast stove 2 is in combustion state；It is arranged at cold air duct 52
On cold wind stop valve 522, cold wind stop valve 522 second end connection cold air adjusting valve 521 first end, at hot-blast stove 2
Open when ventilation state, closed when hot-blast stove 2 is in combustion state；And cold wind pressure-equalizing passageway 53 and it is arranged at cold wind
Cold air pressure equalizing valve 523 on pressure-equalizing passageway 53.The both ends of cold wind pressure-equalizing passageway 53 connect cold wind manifold 152 and hot-blast stove 2 respectively,
It is and in parallel with cold air duct 52.The first end of the first end connection cold wind stop valve 522 of cold air pressure equalizing valve 523, cold air pressure equalizing valve
The second end of 523 second end connection cold air adjusting valve 521.
In one embodiment, Control System of Airheater further includes：Gas header pipe 131, air header 132 and flue gas manifold 133；
Every hot air furnace device further includes：Combustion system 3.Combustion system 3 specifically includes：Gas pipeline 31, air pipeline 32 and flue gas
Pipeline 33.The first end connection gas header pipe 131 of gas pipeline 31, the second end connection hot-blast stove 2 of gas pipeline 31, for inciting somebody to action
Fuel gas transmission from gas header pipe 131 is to hot-blast stove 2.The first end connection air header 132 of air pipeline 32, air pipeline
32 second end connection hot-blast stove 2, for the air from air header 132 to be delivered to hot-blast stove 2；The of flue 33
One end connection flue gas manifold 133, the second end connection hot-blast stove 2 of flue 33, the flue gas for generation that hot-blast stove 2 burns
It is delivered to flue gas manifold 133.
Wherein, combustion system 3 further includes：It is arranged on gas pipeline 31 and successively close to the gas control valve of hot-blast stove 2
311st, the first gas cut off valve 312 and the second gas cut off valve 313；The first end connection combustion gas tune of first gas cut off valve 312
The second end of valve 311 is saved, the second end of the first gas cut off valve 312 connects the first end of the second gas cut off valve 313.It is specific real
Shi Shi, combustion system 3 can also include giving out of gas pipeline 34 and be arranged at the fuel gas ventilation valve to give out of gas on pipeline 34
314；The gas pipeline 31 to give out of gas between 34 and first gas cut off valve 312 of pipeline and the second gas cut off valve 313 connects,
For combustion gas to be discharged Control System of Airheater；The second end of fuel gas ventilation valve 314 connects the second of the first gas cut off valve 312
End and the first end of the second gas cut off valve 313.
In one embodiment, Control System of Airheater further includes：Nitrogen header pipe 140, purge pipeline 4 and be arranged at scavenging conduit
Blow down valve 41 on road 4；Purge the first end connection nitrogen header pipe 140 of pipeline 4, the second end connection Gas Pipe of purging pipeline 4
Road 31, for the nitrogen from nitrogen header pipe 4 to be delivered to gas pipeline 31 and hot-blast stove 2；The second end connection of blow down valve 41
The second end of the second end of first gas cut off valve 312, the first end of the second gas cut off valve 313 and fuel gas ventilation valve 314；
In one embodiment, Control System of Airheater further includes：Flue gas row pressure pipeline 35, the cigarette being arranged on flue 33
Gas stop valve 331 and the flue gas purge valve 332 being arranged on flue gas row pressure pipeline 35；The both ends of flue gas row pressure pipeline 35 connect respectively
Cigarette receiving gas manifold 133 and hot-blast stove 2, and it is in parallel with flue 33；The first end connection flue gas purge valve of flue gas stop valve 331
332 first end, the second end of the second end connection flue gas purge valve 332 of flue gas stop valve 331.
In one embodiment, Control System of Airheater further includes：It is arranged on air pipeline 32 and successively close to hot-blast stove 2
Air control valve 321 and air cutoff valve 322；The second end of the first end connection air control valve 321 of air cutoff valve 322.
In one embodiment, Control System of Airheater further includes mixed wind system, and mixed wind system includes：Respectively with hot air duct
51st, cold air duct 52 and the mixing wind tube road 6 connected of blast furnace 1 and the mixed wind regulating valve 61 and the mixed wind that are arranged on cold wind manifold 152
Stop valve 62.The second end of the mixed wind stop valve 62 of first end connection of mixed wind regulating valve 61, cold wind valve control device 10 also with
Mixed wind regulating valve 61 connects.When any hot-blast stove 2 is in ventilation state, mixed wind system is unanimously closed, hot blast pipe
No cold wind is mixed into road 51.Only when blast furnace 1 is in the blow-on phase or the unstable production phase needs relatively low wind-warm syndrome, just open mixed
Wind stop valve 62, cold wind valve control device 10 adjusts the aperture of mixed wind regulating valve 61, so that it is required relatively low to obtain blast furnace 1
Wind-warm syndrome.Wherein, the position that mixing wind tube road 6 is connected with hot-blast main 151 in mixed wind system can be in any of hot-blast main 151
Position, is not limited with position shown in the present invention.
When hot-blast stove 2, which is in air-supply, turns combustion phases, the operation order of each valve is followed successively by：Close cold air adjusting valve
521st, close cold wind stop valve 522, close hot wind stop valve 511 to close supply air system 5；Flue gas purge valve 332 is opened with flat
The pressure of 331 both sides of weighing apparatus flue gas stop valve, open flue gas stop valve 331, is then shut off flue gas purge valve 332；Combustion gas is closed to put
Dissipate valve 314 and open the second gas cut off valve 313 at the same time, open blow down valve 41 so that nitrogen is delivered to gas pipeline 31 and hot wind
Purged in stove 2；Open air cutoff valve 322 while open air control valve 321 and gas control valve 311, open first
Gas cut off valve 312, closing blow down valve 41 are burnt so that air and combustion gas are passed through in hot-blast stove.
When hot-blast stove 2, which is in burning, transfers the wind stage, the operation order of each valve is followed successively by：Simultaneously close off combustion gas adjusting
311 and first gas cut off valve 312 of valve, the aperture for reducing air control valve 321, open blow down valve 41 so that nitrogen is delivered to combustion
Purged in feed channel 31 and hot-blast stove 2, blow down valve 41 is closed after purging；Close the second gas cut off valve 313 simultaneously
Fuel gas ventilation valve 314 is opened at the same time so that the gas in Control System of Airheater to be discharged；Close air control valve 321, close sky
Gas stop valve 322, close flue gas stop valve 331, open cold air pressure equalizing valve 523 to balance the pressure of 522 both sides of cold wind stop valve；
Hot wind stop valve 511 is opened, cold wind stop valve 522 is opened, closes cold air pressure equalizing valve 523, last gradually increase cold air adjusting valve
521 aperture, into ventilation state.
Wherein, air-supply turns burning time section t ' and burning transfers the length in wind stage t " and selects not similar shape according to hot-blast stove 2
Depending on the opening/closing time length of formula valve (gate valve, butterfly valve etc.), the present invention is not limited thereto.
In conclusion Control System of Airheater provided in an embodiment of the present invention has the advantages that：
(1) two hot-blast stove heat air-supply in parallel, on the premise of hot-blast stove dome temperature is not improved, can improve blast furnace and enter
Stove wind-warm syndrome；
(2) cold wind is not mixed into hot air duct, improves the efficiency of hot-blast stove heat storage, is conducive to blast furnace feeding wind-warm syndrome
Improve and stablize；
(3) wind-warm syndrome in hot-blast main is two mixed stable wind-warm syndrome of hot-blast stove in parallel, is conducive to hot-blast main's longevity
The extension of life；
(4) the end temperature of single stove air-supply is conducive to the raising of hot-blast stove heat storage efficiency well below blast furnace required temperature；
(5) single stove air-supply time lengthening, reduces the energy-saving and emission-reduction changed heat number, be conducive to blast fumance of hot-blast stove.
Particular embodiments described above, has carried out the purpose of the present invention, technical solution and beneficial effect further in detail
Describe in detail it is bright, it should be understood that the foregoing is merely the present invention specific embodiment, the guarantor being not intended to limit the present invention
Scope is protected, within the spirit and principles of the invention, any modification, equivalent substitution, improvement and etc. done, should be included in this
Within the protection domain of invention.
Claims (10)
- A kind of 1. Control System of Airheater, it is characterised in that the Control System of Airheater is connected with blast furnace, including：Three hot air furnace devices, hot-blast main, cold wind manifold, total moisture content monitoring device and cold wind valve control device, the heat Wind manifold is connected with the blast furnace；Every hot air furnace device includes：Hot-blast stove, hot air duct, cold air duct, hot-blast stove wind pushing temperature monitoring device and cold Wind regulating valve；The first end of the hot air duct connects the hot-blast stove, and the second end of the hot air duct connects the hot-blast main；The first end of the cold air duct connects the hot-blast stove, and the second end of the cold air duct connects the cold wind manifold；The hot-blast stove wind pushing temperature monitoring device is arranged on the hot air duct, for monitoring the air-supply temperature of the hot-blast stove Degree；The cold air adjusting valve is arranged on the cold air duct, for adjusting the air quantity of cold wind；The hot-blast stove is used for：Blown by the hot air duct and the hot-blast main to the blast furnace, and by described cold Wind pipeline receives the cold wind from the cold wind manifold；Wherein two of three hot-blast stoves are in ventilation state, and another seat is in Combustion state；The total moisture content monitoring device is arranged on the hot-blast main, for monitoring the air intake vent temperature of the blast furnace；The cold wind valve control device connects the total moisture content monitoring device, and the cold air adjusting valve of every hot air furnace device With hot-blast stove wind pushing temperature monitoring device, it is used for：When the wind pushing temperature of wherein one hot-blast stove in ventilation state reaches preset value, the air-supply is gradually reduced Temperature reaches the aperture of the corresponding cold air adjusting valve of hot-blast stove of preset value, opens and gradually increase the hot wind for completing combustion state The aperture of the corresponding cold air adjusting valve of stove, closes the corresponding cold air adjusting valve of hot-blast stove that another seat is in ventilation state；When the air intake vent temperature is higher than the preset value, it is corresponding cold to reduce two hot-blast stoves in ventilation state The governing speed of wind regulating valve；When the air intake vent temperature is less than the preset value, increase is described to be in the two of ventilation state The governing speed of the corresponding cold air adjusting valve of seat hot-blast stove.
- 2. Control System of Airheater according to claim 1, it is characterised in that further include：The hot wind stop valve being arranged on the hot air duct, the hot wind stop valve is when the hot-blast stove is in ventilation state Open, closed when the hot-blast stove is in combustion state.
- 3. Control System of Airheater according to claim 1, it is characterised in that further include：The cold wind stop valve being arranged on the cold air duct, the second end of the cold wind stop valve connect the cold air adjusting valve First end, open when the hot-blast stove is in ventilation state, closed when the hot-blast stove is in combustion state.
- 4. Control System of Airheater according to claim 3, it is characterised in that further include：Cold wind pressure-equalizing passageway and the cold air pressure equalizing valve being arranged on the cold wind pressure-equalizing passageway；The both ends of the cold wind pressure-equalizing passageway connect the cold wind manifold and the hot-blast stove respectively, and with the cold air duct simultaneously Connection；The first end of the cold air pressure equalizing valve connects the first end of the cold wind stop valve, and the second end of the cold air pressure equalizing valve connects Connect the second end of the cold air adjusting valve.
- 5. Control System of Airheater according to claim 1, it is characterised in that further include：Gas header pipe, air header and flue gas manifold；Every hot air furnace device further includes：Gas pipeline, air pipeline and flue；The first end of the gas pipeline connects the gas header pipe, and the second end of the gas pipeline connects the hot-blast stove, For by the fuel gas transmission from the gas header pipe to the hot-blast stove；The first end of the air pipeline connects the air header, and the second end of the air pipeline connects the hot-blast stove, For the air from the air header to be delivered to the hot-blast stove；The first end of the flue connects the flue gas manifold, and the second end of the flue connects the hot-blast stove, Flue gas for the Combustion of Hot Air Furnace to be produced is delivered to the flue gas manifold.
- 6. Control System of Airheater according to claim 5, it is characterised in that further include：It is arranged on the gas pipeline and the gas control valve close to the hot-blast stove, the first gas cut off valve and second successively Gas cut off valve；The first end of first gas cut off valve connects the second end of the gas control valve, first gas cut off valve Second end connects the first end of second gas cut off valve.
- 7. Control System of Airheater according to claim 6, it is characterised in that further include：Give out of gas and pipeline and be arranged at the fuel gas ventilation valve to give out of gas on pipeline；The gas pipeline to give out of gas between pipeline and first gas cut off valve and second gas cut off valve connects Connect, for the combustion gas to be discharged the Control System of Airheater；The second end of the fuel gas ventilation valve connects the second end of first gas cut off valve and second gas cut off valve First end.
- 8. Control System of Airheater according to claim 7, it is characterised in that further include：Nitrogen header pipe, purge pipeline and the blow down valve being arranged on the purging pipeline；The first end of the purging pipeline connects the nitrogen header pipe, and the second end of the purging pipeline connects the Gas Pipe Road, for the nitrogen from the nitrogen header pipe to be delivered to the gas pipeline and the hot-blast stove；The second end of the blow down valve connects the second end of first gas cut off valve, the first of second gas cut off valve End and the second end of the fuel gas ventilation valve.
- 9. Control System of Airheater according to claim 5, it is characterised in that further include：Flue gas row pressure pipeline, the flue gas stop valve being arranged on the flue and it is arranged on the flue gas row pressure pipeline Flue gas purge valve；The both ends of the flue gas row pressure pipeline connect the flue gas manifold and the hot-blast stove respectively, and with the flue simultaneously Connection；The first end of the flue gas stop valve connects the first end of the flue gas purge valve, and the second end of the flue gas stop valve connects Connect the second end of the flue gas purge valve.
- 10. Control System of Airheater according to claim 5, it is characterised in that further include：It is arranged on the air pipeline and successively close to the air control valve and air cutoff valve of the hot-blast stove；The first end of the air cutoff valve connects the second end of the air control valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448003.1A CN108004358A (en) | 2017-12-27 | 2017-12-27 | Hot blast stove control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711448003.1A CN108004358A (en) | 2017-12-27 | 2017-12-27 | Hot blast stove control system |
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| Publication Number | Publication Date |
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| CN108004358A true CN108004358A (en) | 2018-05-08 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711448003.1A Pending CN108004358A (en) | 2017-12-27 | 2017-12-27 | Hot blast stove control system |
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| CN (1) | CN108004358A (en) |
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| CN108707713A (en) * | 2018-06-20 | 2018-10-26 | 北京首钢股份有限公司 | A kind of hot-blast stove attemperator and method |
| CN113549724A (en) * | 2021-06-16 | 2021-10-26 | 宣化钢铁集团有限责任公司 | Control method for customizing and efficiently replacing hot blast stove |
| CN115386665A (en) * | 2022-08-30 | 2022-11-25 | 马鞍山钢铁股份有限公司 | Method for accurately controlling and adjusting 150-600 ℃ air temperature during blast furnace drying |
| CN115820963A (en) * | 2023-02-22 | 2023-03-21 | 山西建龙实业有限公司 | Oxygen-enriched burning system of hot blast stove and parallel control method |
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| CN115386665A (en) * | 2022-08-30 | 2022-11-25 | 马鞍山钢铁股份有限公司 | Method for accurately controlling and adjusting 150-600 ℃ air temperature during blast furnace drying |
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| CN115820963A (en) * | 2023-02-22 | 2023-03-21 | 山西建龙实业有限公司 | Oxygen-enriched burning system of hot blast stove and parallel control method |
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