CN207918897U - Control System of Airheater - Google Patents
Control System of Airheater Download PDFInfo
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- CN207918897U CN207918897U CN201721871703.7U CN201721871703U CN207918897U CN 207918897 U CN207918897 U CN 207918897U CN 201721871703 U CN201721871703 U CN 201721871703U CN 207918897 U CN207918897 U CN 207918897U
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Abstract
The utility model provides a kind of Control System of Airheater, 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 connect 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；Hot air duct connects hot-blast stove and hot-blast main；Cold air duct connects hot-blast stove and cold wind manifold；Hot-blast stove wind pushing temperature monitoring device monitors the wind pushing temperature of hot-blast stove；Cold air adjusting valve is arranged on cold air duct；Wherein two of three hot-blast stoves are in ventilation state, and another seat is in combustion state；Total moisture content monitoring device monitors the air intake vent temperature of blast furnace；Cold wind valve control device connects the cold air adjusting valve and hot-blast stove wind pushing temperature monitoring device of total moisture content monitoring device and every hot air furnace device, for adjusting cold air adjusting valve.The efficiency of hot-blast stove heat storage can be improved in the utility model.
Description
Technical field
The utility model is related to the blast funnace hot blast stove technical fields of metallurgy industry, and in particular, to a kind of hot-blast stove control
System.
Background technology
Hot-blast stove is a kind of equipment 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 be mixed into cold wind in hot air duct, drop
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 has 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.
Wait for that next air-supply, the whole efficiency of hot-blast stove are 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.
Utility model content
The main purpose of the utility model embodiment is to provide a kind of Control System of Airheater, to obtain stable blast furnace
Enter stove wind-warm syndrome, improve the efficiency of hot-blast stove heat storage, reduces changing-over stove and discharge number.
To achieve the goals above, the utility model embodiment provides a kind of Control System of Airheater, hot-blast stove control system
System is connect 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, heat
Wind manifold is connect 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 of hot air duct connects hot-blast stove, and the second end of hot air duct connects hot-blast main；
The first end of cold air duct connects hot-blast stove, 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, the wind pushing temperature for monitoring hot-blast stove；
Cold air adjusting valve is arranged on cold air duct, the air quantity for adjusting cold wind；
Hot-blast stove is used for：It is blown to blast furnace by hot air duct and hot-blast main, 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, the air intake vent temperature for monitoring blast furnace；
Cold wind valve control device connects the cold air adjusting valve and heat of total moisture content monitoring device and 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, it is gradually reduced wind pushing temperature
Reach the aperture of the corresponding cold air adjusting valve of hot-blast stove of preset value, open and gradually increases 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, increase the corresponding cold wind tune of two hot-blast stoves in ventilation state
Save the governing speed of valve.
In wherein a kind of embodiment, further include：
The hot wind stop valve being set 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 set 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 set on cold wind pressure-equalizing passageway；
The both ends of cold wind pressure-equalizing passageway are separately connected cold wind manifold and hot-blast stove, 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 of cold air pressure equalizing valve connect cold wind tune
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 of gas pipeline connects gas header pipe, and the second end of gas pipeline connects hot-blast stove, is used for spontaneous combustion in future
The fuel gas transmission of gas manifold is to hot-blast stove；
The first end of air pipeline connects air header, and the second end of air pipeline connects hot-blast stove, for that will come from sky
The air delivery of gas manifold is to hot-blast stove；
The first end of flue connects flue gas manifold, and the second end of flue connects hot-blast stove, is used for the heat
The flue gas that wind furnace burning generates is delivered to the flue gas manifold.
In wherein a kind of embodiment, further include：
It is set on gas pipeline and successively close to the gas control valve of hot-blast stove, the first gas cut off valve and the second combustion gas
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：
It gives out of gas and pipeline and is set to 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, being used for will
Control System of Airheater is discharged in combustion gas；
The second end of fuel gas ventilation valve connects the first end of the second end and the second gas cut off valve of the first gas cut off valve.
In wherein a kind of embodiment, further include：
Nitrogen header pipe, purging pipeline and the blow down valve being set on purging pipeline；
The first end for purging pipeline connects nitrogen header pipe, 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 set on flue and the flue gas being set on flue gas row pressure pipeline
Purge valve；
The both ends of flue gas row pressure pipeline are separately connected flue gas manifold and hot-blast stove, 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 set on air pipeline and successively close to the air control valve of hot-blast stove and air cutoff valve；
The second end of the first end connection air control valve of air cutoff valve.
The Control System of Airheater of the utility model embodiment is connect with blast furnace, including three hot air furnace devices, hot winds are total
Pipe, cold wind manifold, total moisture content monitoring device and cold wind valve control device, hot-blast main connect with blast furnace；Every hot-blast stove dress
It sets and includes：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 is logical
It crosses hot air duct and hot-blast main to blow to blast furnace, and the cold wind from cold wind manifold is received by cold air duct；Three hot winds
Wherein two of stove are in ventilation state, and another seat is in combustion state；Hot-blast stove wind pushing temperature monitoring device is arranged in hot wind
On pipeline, the wind pushing temperature for monitoring hot-blast stove；Cold air adjusting valve is arranged on cold air duct, the wind for adjusting cold wind
Amount；Wherein, total moisture content monitoring device is arranged on hot-blast main, the air intake vent temperature for monitoring blast furnace；Cold blast sliding valve gate system
Device connects the cold air adjusting valve and hot-blast stove wind pushing temperature monitoring dress of total moisture content monitoring device and every hot air furnace device
It sets, to adjust cold air adjusting valve according to wind pushing temperature and air intake vent temperature, to enable two hot-blast stove parallel connection air-supplies, is not improving
Blast furnace feeding wind-warm syndrome is improved under the premise of hot-blast stove dome temperature, extends single stove air supply time, reduce hot-blast stove changes stove
Number is conducive to the energy-saving and emission-reduction of blast fumance.Meanwhile it not being mixed into cold wind in the hot air duct of the utility model, improve heat
The efficiency of wind furnace heat storage is conducive to raising, stabilization and the hot-blast main's life-time dilatation of the air intake vent temperature of blast furnace.
Description of the drawings
In order to illustrate the embodiment of the utility model or the technical proposal in the existing technology more clearly, below will be to embodiment
Attached drawing needed in description is briefly described, it should be apparent that, the accompanying drawings in the following description is only that this practicality is new
Some embodiments of type for those of ordinary skill in the art without creative efforts, can be with root
Other attached drawings are obtained according to these attached drawings.
Fig. 1 is the structure diagram of Control System of Airheater in the utility model embodiment；
Fig. 2 is the relational graph of the air output of the hot-blast stove of Control System of Airheater and time in the utility model embodiment.
Specific implementation mode
The following will be combined with the drawings in the embodiments of the present invention, carries out the technical scheme in the embodiment of the utility model
Clearly and completely describe, it is clear that the described embodiments are only a part of the embodiments of the utility model, rather than whole
Embodiment.Based on the embodiments of the present invention, those of ordinary skill in the art are without making creative work
The every other embodiment obtained, shall fall within the protection scope of the present invention.
Cause the whole efficiency of hot-blast stove relatively low using " two, which burn one, send " working system in view of in currently available technology, blows
Time is short, cause to change stove often, discharge amount of exhaust gas it is big, the utility model embodiment provides a kind of Control System of Airheater and enables two
The air-supply in parallel of seat hot-blast stove heat, improves the efficiency of hot-blast stove heat storage, is carried under the premise of not improving hot-blast stove dome temperature
High blast furnace feeding wind-warm syndrome extends single stove air supply time, and reduce hot-blast stove changes heat number, is conducive to the energy saving of blast fumance
Emission reduction.The utility model is described in detail below in conjunction with attached drawing.
Fig. 1 is the structure diagram of Control System of Airheater in the utility model embodiment.As shown in Figure 1, hot-blast stove controls
System is connect with blast furnace 1, including：Three hot air furnace devices, hot-blast main 151, cold wind manifold 152,8 and of total moisture content monitoring device
Cold wind valve control device 10.Wherein, hot-blast main 151 connect 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
The second end of hot-blast stove 2, hot air duct 51 connects hot-blast main 151；The first end of cold air duct 52 connects hot-blast stove 2, 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, the air quantity for adjusting 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, top ignition may be used
The different forms such as hot-blast stove, external combustion stove, internal combustion stove or pebble stove, the utility model not as
Limit.
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 relational graph of the air output of the hot-blast stove of Control System of Airheater and time in the utility model embodiment.
Horizontal axis in Fig. 2 is the time, and the longitudinal axis is air output.As shown in Fig. 2, when hot-blast stove 2 (hot-blast stove NO.1) is in the air-supply of upper half way
When the stage, 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；When
When hot-blast 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,
Leading 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 to exist
Parallel connection air-supply, third seat hot-blast stove are in combustion state.
Wherein, total moisture content monitoring device 8 is arranged on hot-blast main 151, the air intake vent temperature for monitoring blast furnace 1；It is cold
Air-valve controlling device for doors 10 connects the cold air adjusting valve 521 and hot-blast stove of total moisture content monitoring device 8 and 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 2 corresponding cold air adjusting valve 521 of hot-blast stove, is opened and the hot-blast stove 2 for gradually increasing completion combustion state is corresponding cold
The aperture of wind regulating valve 521 closes the 2 corresponding cold air adjusting valve 521 of hot-blast stove that another seat is in ventilation state.Wherein, complete
It can switch to ventilation state at the hot-blast stove 2 of combustion state.
Wherein, parameter input device and comparator may be used to realize above-mentioned function in cold wind valve control device 10.Example
Such as, cold wind valve control device 10 may include：Parameter input device, for inputting blast furnace required temperature T；It inputs and fills with parameter
It sets, the comparator of the connection of cold air adjusting valve 521 of hot-blast stove wind pushing temperature monitoring device 9 and every hot air furnace device, being used for will
Wind pushing temperature exports the driving instruction of cold air adjusting valve 521 compared with blast furnace required temperature T；The valve being connect with comparator
Adjusting apparatus, for adjusting cold air adjusting valve 521 according to driving instruction.
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 for saving valve 521 is maximum, and the air output of hot-blast stove NO.3 also reaches maximum value, and cold wind valve control device 10 gradually subtracts at this time
The aperture of the corresponding cold air adjusting valve of small hot-blast stove NO.3 521, hot-blast stove NO.3 enter lower half way and blow the stage；Meanwhile cold wind
Valve control device 10 is also opened and is gradually increased 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 upper half way and blow the 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
It burns, burn furnace period and burning transfer wind.T ' is that air-supply turns burning time section, and t " is that burning transfers the wind stage.
The hot blast temperature that every hot-blast stove 2 is sent out in ventilation state is in continuously decrease trend.When rigid putting in blast, hot-blast stove
The 2 hot blast temperature highests sent out；When the aperture maximum of 2 corresponding cold air adjusting valve 521 of hot-blast stove, 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 also according to air intake vent temperature
Deviation between blast furnace required temperature T carries out aperture regulation to the cold air adjusting valve 521 for two hot-blast stoves 2 blown.
When it is implemented, when air intake vent temperature (the detection temperature of total moisture content monitoring device 8) is higher than preset value, cold blast sliding valve gate system dress
Set the governing speed that 10 reductions are in two hot-blast stoves, the 2 corresponding cold air adjusting valve 521 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, with ensure two hot-blast stoves 2 send out 1 required temperature T of the mixed temperature of hot wind and blast furnace between deviation
No more than 5 DEG C.
Wherein, parameter input device and comparator may be used to realize above-mentioned function in cold wind valve control device 10.Example
Such as, cold wind valve control device 10 may include：Parameter input device, for inputting blast furnace required temperature T；It inputs and fills with parameter
It sets, the comparator of the connection of cold air adjusting valve 521 of total moisture content monitoring device 8 and every hot air furnace device, is used for air intake vent temperature
Degree exports the driving instruction of cold air adjusting valve 521 compared with blast furnace required temperature T；The valve adjustment dress being connect with comparator
It sets, the regulations speed for adjusting cold air adjusting valve 521 according to driving instruction.
In one embodiment, supply air system 5 further includes：The hot wind stop valve 511 being set 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 set to 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
It opens when ventilation state, is closed when hot-blast stove 2 is in combustion state；And cold wind pressure-equalizing passageway 53 and it is set to cold wind
Cold air pressure equalizing valve 523 on pressure-equalizing passageway 53.The both ends of cold wind pressure-equalizing passageway 53 are separately connected cold wind manifold 152 and hot-blast stove 2,
And it is 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 of gas pipeline 31 connects gas header pipe 131, and the second end of gas pipeline 31 connects hot-blast stove 2, and being used for will
Fuel gas transmission from gas header pipe 131 is to hot-blast stove 2.The first end of air pipeline 32 connects air header 132, air pipeline
32 second end connects hot-blast stove 2, for will the air delivery from air header 132 to hot-blast stove 2；The of flue 33
One end connects flue gas manifold 133, and the second end of flue 33 connects hot-blast stove 2, the flue gas for generating the burning of hot-blast stove 2
It is delivered to flue gas manifold 133.
Wherein, combustion system 3 further includes：It is set on gas pipeline 31 and successively close to the gas control valve of hot-blast stove 2
311, the first gas cut off valve 312 and the second gas cut off valve 313；The first end of first gas cut off valve 312 connects combustion gas tune
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 to be set to the fuel gas ventilation valve to give out of gas on pipeline 34
314；The gas pipeline 31 to give out of gas between pipeline 34 and the first gas cut off valve 312 and the second gas cut off valve 313 connects,
For Control System of Airheater to be discharged in combustion gas；The second end of fuel gas ventilation valve 314 connects the second of the first gas cut off valve 312
The first end at end and the second gas cut off valve 313.
In one embodiment, Control System of Airheater further includes：Nitrogen header pipe 140 purges pipeline 4 and is set to scavenging conduit
Blow down valve 41 on road 4；The first end for purging pipeline 4 connects nitrogen header pipe 140, and the second end of purging pipeline 4 connects Gas Pipe
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 of blow down valve 41 connects
The second end of the second end of first gas cut off valve 312, the first end and fuel gas ventilation valve 314 of the second gas cut off valve 313；
In one embodiment, Control System of Airheater further includes：The cigarette that flue gas row pressure pipeline 35, is set on flue 33
Gas stop valve 331 and the flue gas purge valve 332 being set 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 of flue gas stop valve 331 connects flue gas purge valve
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 set 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
51, 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 set on cold wind manifold 152
Stop valve 62.The first end connection of mixed wind regulating valve 61 mixes the second end of wind stop valve 62, 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 for mixing wind regulating valve 61, 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 the arbitrary of hot-blast main 151
Position is not limited with position shown in the utility model.
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
521, it closes 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 opens flue gas stop valve 331, is then shut off flue gas purge valve 332；Combustion gas is closed to put
It dissipates valve 314 and opens simultaneously the second gas cut off valve 313, opens blow down valve 41 so that nitrogen is delivered to gas pipeline 31 and hot wind
It is purged in stove 2；It opens air cutoff valve 322, open simultaneously air control valve 321 and gas control valve 311, opening first
Gas cut off valve 312, closing blow down valve 41 are burnt so that air and combustion gas to be 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
Valve 311 and the first gas cut off valve 312, the aperture for reducing air control valve 321, opening blow down valve 41 by nitrogen to be delivered to combustion
It is 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 simultaneously so that the gas in Control System of Airheater to be discharged；It closes air control valve 321, close sky
Gas stop valve 322 closes flue gas stop valve 331, opens 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, it is last gradually to increase cold air adjusting valve
521 aperture, into ventilation state.
Wherein, air-supply turns burning time section t ' and the length of burning transfer wind stage t " 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 utility model is not limited thereto.
In conclusion the Control System of Airheater that the utility model embodiment provides has the advantages that：
(1) two hot-blast stove heat air-supply in parallel, under the premise of not improving hot-blast stove dome temperature, can improve blast furnace and enter
Stove wind-warm syndrome；
(2) it is not mixed into cold wind in hot air duct, improves the efficiency of hot-blast stove heat storage, be conducive to blast furnace feeding wind-warm syndrome
It improves and stablizes；
(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 extends, and reduce hot-blast stove changes heat number, is conducive to the energy-saving and emission-reduction of blast fumance.
Particular embodiments described above has carried out into one the purpose of this utility model, technical solution and advantageous effect
Step is described in detail, it should be understood that the foregoing is merely specific embodiment of the utility model, is not used to limit this
The protection domain of utility model, within the spirit and principle of the utility model, any modification for being made, changes equivalent replacement
Into etc., it should be included within the scope of protection of this utility model.
Claims (10)
1. a kind of Control System of Airheater, which is characterized in that the Control System of Airheater is connect 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 connect 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, the air-supply temperature for monitoring the hot-blast stove
Degree；
The cold air adjusting valve is arranged on the cold air duct, the air quantity for adjusting cold wind；
The hot-blast stove is used for：It is blown to the blast furnace by the hot air duct and the hot-blast main, 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, the air intake vent temperature for monitoring the blast furnace；
The cold wind valve control device connects the cold air adjusting valve of the total moisture content monitoring device and 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, it is gradually reduced the air-supply
Temperature reaches the aperture of the corresponding cold air adjusting valve of hot-blast stove of preset value, opens and gradually increases 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, which is characterized in that further include：
The hot wind stop valve being set on the hot air duct, the hot wind stop valve is when the hot-blast stove is in ventilation state
It opens, is closed when the hot-blast stove is in combustion state.
3. Control System of Airheater according to claim 1, which is characterized in that further include：
The second end of the cold wind stop valve being set on the cold air duct, the cold wind stop valve connects 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, which is characterized in that further include：
Cold wind pressure-equalizing passageway and the cold air pressure equalizing valve being set on the cold wind pressure-equalizing passageway；
The both ends of the cold wind pressure-equalizing passageway are separately connected the cold wind manifold and the hot-blast stove, and simultaneously with the cold air duct
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, which is characterized 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 will 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 will the air delivery from the air header 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 generating the Combustion of Hot Air Furnace is delivered to the flue gas manifold.
6. Control System of Airheater according to claim 5, which is characterized in that further include：
It is set on the gas pipeline and successively close to the gas control valve of the hot-blast stove, the first gas cut off valve and second
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, which is characterized in that further include：
It gives out of gas and pipeline and is set to 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
It connects, for the Control System of Airheater to be discharged in the combustion gas；
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, which is characterized in that further include：
Nitrogen header pipe, the blow down valve for purging pipeline and being set 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 connect the second end of first gas cut off valve, second gas cut off valve first
The second end at end and the fuel gas ventilation valve.
9. Control System of Airheater according to claim 5, which is characterized in that further include：
It flue gas row pressure pipeline, the flue gas stop valve being set on the flue and is set on the flue gas row pressure pipeline
Flue gas purge valve；
The both ends of the flue gas row pressure pipeline are separately connected the flue gas manifold and the hot-blast stove, and simultaneously with the flue
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, which is characterized in that further include：
It is set 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 |
|---|---|---|---|
| CN201721871703.7U CN207918897U (en) | 2017-12-27 | 2017-12-27 | Control System of Airheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721871703.7U CN207918897U (en) | 2017-12-27 | 2017-12-27 | Control System of Airheater |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108004358A (en) * | 2017-12-27 | 2018-05-08 | 中冶京诚工程技术有限公司 | Control System of Airheater |
| CN110907039A (en) * | 2019-11-30 | 2020-03-24 | 广东韶钢松山股份有限公司 | Pipe system temperature detection system and detection method |
| CN113088603A (en) * | 2021-04-09 | 2021-07-09 | 广东韶钢松山股份有限公司 | Hot blast stove and sectional type pressure test leakage detection method of hot blast stove |
-
2017
- 2017-12-27 CN CN201721871703.7U patent/CN207918897U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108004358A (en) * | 2017-12-27 | 2018-05-08 | 中冶京诚工程技术有限公司 | Control System of Airheater |
| CN110907039A (en) * | 2019-11-30 | 2020-03-24 | 广东韶钢松山股份有限公司 | Pipe system temperature detection system and detection method |
| CN113088603A (en) * | 2021-04-09 | 2021-07-09 | 广东韶钢松山股份有限公司 | Hot blast stove and sectional type pressure test leakage detection method of hot blast stove |
| CN113088603B (en) * | 2021-04-09 | 2022-05-20 | 广东韶钢松山股份有限公司 | Hot blast stove and sectional type pressure test leakage detection method of hot blast stove |
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