CN206014993U - A kind of blast-furnace hot-air furnace apparatus and its cold wind intelligent regulating system - Google Patents
A kind of blast-furnace hot-air furnace apparatus and its cold wind intelligent regulating system Download PDFInfo
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- CN206014993U CN206014993U CN201621101160.6U CN201621101160U CN206014993U CN 206014993 U CN206014993 U CN 206014993U CN 201621101160 U CN201621101160 U CN 201621101160U CN 206014993 U CN206014993 U CN 206014993U
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Abstract
The utility model discloses a kind of blast-furnace hot-air furnace apparatus and its cold wind intelligent regulating system, belong to technical field of automatic control, more particularly to blast funnace hot blast stove is when changing stove, cold wind pressure oscillation control technology, which solves existing blast funnace hot blast stove and there is a problem of that cold wind pressure oscillation causes blast fumance Quality Down.Cold wind intelligent regulating system of the present utility model includes PLC, pressure part and cold air adjusting valve, and described cold air adjusting valve is electric gate valve, is connected with described PLC by controlling cable；Described pressure part is arranged on hot-blast stove cold air blast pipeline, is connected with described PLC by controlling cable.The fluctuation of cold wind pressure when the utility model can effectively reduce changing-over stove, reduces the fluctuating range of cold wind pressure during changing-over stove, improves blast fumance quality.
Description
Technical field
The utility model belongs to technical field of automatic control, more particularly to blast funnace hot blast stove is when changing stove, cold wind pressure wave
Dynamic control technology, specifically, is related to a kind of blast-furnace hot-air furnace apparatus and its cold wind intelligent regulating system.
Background technology
Hot-blast stove is that alternation of burning and blow continuously supplies the equipment of blast furnace high temperature air.In general, per seat height
Stove is equipped with three to four hot-blast stoves, and in blast furnace production process, blast furnace is to provide stable high temperature to the basic demand of hot-blast stove
Wind.In order that blast furnace stablized, continuous hot blast, every hot-blast stove has burning accumulation of heat and the process to blast furnace air feed.
When medium and small blast furnace changing-over stove is operated now, cold wind pressure has a certain degree of fluctuation, undulating value size
Valve opening of the control mainly by cold blast sliding valve adjusting.As valve opening size receives manual operation factor, equipment certainly
The impact of the factors such as body precision is larger, and cold wind pressure oscillation can be caused larger, blast fumance is directly affected during stove is changed；Very
Blast furnace is caused to break wind to the error signal occurred because of valve opening value.
Chinese Patent Application No. 201480056222.3, the patent application document in publication date on June 1st, 2016, discloses
A kind of hot-blast furnace equipment, which is heated with air to blast furnace, and wherein, the hot-blast furnace equipment includes：Hot-blast stove, its are used for institute
State blast furnace to be heated with air；Combustion air pipe, its are used for conveying combustion air to the hot-blast stove；Fuel gas
Pipe, its are used for fuel gas of the installation for blast furnace gas as the hot-blast stove for being fed from the blast furnace discharge to the hot-blast stove；Cigarette
Deferent, its are used for being fed from the waste gas that the hot-blast stove is discharged to chimney；1st preheating unit, its are linked to the flue tube, and
And, be linked to one of the combustion air pipe and described fuel gas pipe, using by heat exchange from the hot blast
The heat reclaimed in the waste gas of stove is preheated to one of the combustion air and the installation for blast furnace gas；And the 2nd
Preheating unit, its have the 1st heater for making a part for the installation for blast furnace gas burn, and it is empty to be linked to the burning
The other of tracheae and the fuel gas pipe, using the warm produced in the 1st heater to the combustion air
Preheated with the other of the installation for blast furnace gas.Chinese Patent Application No. 200910078275.6, publication date in July, 2009
The patent application document of 22 days, discloses a kind of high temperature system of blast of blast-furnace hot-air furnace apparatus, belongs to steel and iron industry blast furnace ironmaking skill
Art field.Including parts such as blast furnace, hot-blast stove, separate type heat pipe exchanger, blower fan, chimney, cross valve and connecting pipes.System
There are two to four hot-blast stoves, wherein by the hot air reflux of 10～25% ratios after a hot blast stove heat in another hot blast
The comburent air duct of stove, while the high-temperature flue gas for drawing 10～25% ratios of the hot-blast stove in main combustion period exhaust through pipe
Ceramic heat storage body warm-up combustion-supporting air is installed in road, and combustion air mixes sky combustion-supporting as high temperature with backflow hot blast after preheating
Gas, is exchanged heat by separate heat pipe through installing after the pipeline discharge flue gas of ceramic heat storage body is together mixed with hot-blast stove tail flue gas
Device preheating gas, then preheating gas and high temperature combustion air together enter Combustion of Hot Air Furnace.Heat can be improved by the method
Wind furnace top temperature is 1400～1600 DEG C, so as to improve 100-400 DEG C of Blast Temperature, realizes fully burning blast-furnace gas hot-blast stove
1200～1500 DEG C of wind-warm syndrome.
But the technical scheme of above-mentioned two parts of patent application publications still suffers from, because of the fluctuation of cold wind pressure, affecting blast fumance,
The danger of blast furnace disconnected wind is even caused.
Content of the invention
1st, problem to be solved
There is a problem of that cold wind pressure oscillation causes blast fumance Quality Down for existing blast funnace hot blast stove, this practicality is new
Type provides a kind of blast-furnace hot-air furnace apparatus and its cold wind intelligent regulating system, cold wind pressure when can effectively reduce changing-over stove
Fluctuation, reduces the fluctuating range of cold wind pressure during changing-over stove, improves blast fumance quality.
2nd, technical scheme
For solving the above problems, the utility model is adopted the following technical scheme that.
A kind of blast-furnace hot-air furnace apparatus cold wind intelligent regulating system, is adjusted including PLC, pressure part and cold wind
Valve, described cold air adjusting valve are electric gate valve, are connected with described PLC by controlling cable；Described pressure portion
Part is arranged on hot-blast stove cold air blast pipeline, is connected with described PLC by controlling cable.
Preferably, described pressure part is wind pressure sensor.
Preferably, also include host computer display；Described host computer display is controlled with described PLC by communication cable
Device connection processed.
A kind of blast-furnace hot-air furnace apparatus, including cold air duct, also include a kind of above-mentioned blast-furnace hot-air furnace apparatus cold wind intelligence
Regulating system, described cold air adjusting valve are arranged on described cold air duct near one end of regenerator；Described pressure portion
Part is arranged on cold air duct the one end away from regenerator.
Preferably, including three hot-blast stoves, one is provided with the cold air duct being connected with the hot-blast stove described in each
Individual cold air adjusting valve.
Preferably, cold wind cut-out is additionally provided with the cold air duct between described cold air adjusting valve and described hot-blast stove
Valve.
Preferably, described cold wind stop valve is electric gate valve.
Preferably, air control valve and gas regulator are respectively arranged with air duct, gas piping；Described air
Regulating valve and gas regulator are connected with described PLC by controlling cable.
3rd, beneficial effect
Compared to prior art, the beneficial effects of the utility model are：
(1) a kind of blast-furnace hot-air furnace apparatus cold wind intelligent regulating system of the present utility model is controlled using PLC
Cold air adjusting valve, compare adjust manually more intelligent, become more meticulous, during stove is changed, the system constantly gathers cold wind pressure
With the variable quantity of flow, writing by program, when the changing value of cold wind pressure and flow is more than setting value (adjustable) or change
Rate is more than setting value (adjustable), and intelligent controlling device output block, valve opening are temporarily locked；Change when cold wind pressure and flow
Value or rate of change continue valve opening after tending towards stability, and are effectively controlled the fluctuation of cold wind pressure, it is to avoid occur because of valve opening value
Error signal cause blast furnace to break wind；
(2) a kind of blast-furnace hot-air furnace apparatus cold wind intelligent regulating system of the present utility model also includes host computer display,
To realize showing cold wind supply situation in hot-blast stove in real time, precision control effect is further improved；
(3) after a kind of blast-furnace hot-air furnace apparatus of the present utility model are using the cold wind intelligent regulating system in the utility model
The automated intelligent control of cold wind is achieved, solving existing blast funnace hot blast stove and there is cold wind pressure oscillation causes blast fumance quality
The problem of decline, the fluctuation of cold wind pressure when greatly reducing changing-over stove, pressure oscillation value by 20kPa be reduced to 7kPa with
Interior, be conducive to blast fumance.
Description of the drawings
Overall structure diagrams of the Fig. 1 for the utility model hot-blast furnace equipment；
Fig. 2 is the connection sketch of cold wind intelligent regulating system in the utility model.
In figure：1st, air control valve；2nd, air cutoff valve；3rd, air burning valve；4th, hot-blast valve；5th, gas regulator；6、
Gas stop valve；7th, gas-fired valve；8th, gas bleeding valve；9th, chimney valve；10th, cold wind stop valve；11st, cold air adjusting valve；12、
Exhaust gas valve；13rd, damping down valve is flow backwards；14th, wind stop valve is mixed；15th, wind regulating valve is mixed；16th, chimney；17th, gas piping；18th, air
Pipeline；19th, gas preheater；20th, air preheater；21st, flue gas and waste gas conveying；22nd, cold wind conveying；23rd, to blast-furnace hot-air
Conveying；24th, PLC；25th, pressure part；26th, host computer display.
Specific embodiment
The utility model is further described below with reference to specific embodiment.
Embodiment 1
As shown in figure 1, a kind of blast-furnace hot-air furnace apparatus, including a kind of blast-furnace hot-air furnace apparatus cold wind intelligent regulating system and
Tri- hot-blast stoves of A, B, C, also include air preheater 20, gas preheater 19, chimney 16, air blast；
Described air preheater 20 is connected with hot-blast stove by air duct 18, enters heat on described air duct 18
One end of wind furnace is disposed with air control valve 1, air cutoff valve 2, air burning valve 3, and air control valve 1 is electric rotating plate
Valve, specification are DN700 (referring to valve aperture for 700mm, similarly hereinafter), play a part of to adjust air mass flow, and air cutoff valve 2 is electronic
Gate valve, specification are DN700, play a part of to close air circulation, and air burning valve 3 is electric gate valve, and specification is DN1000, is
Air flow control is burnt with playing a part of control before air with coal gas mixed combustion；
Described gas preheater 19 is connected with hot-blast stove by gas piping 17, enters heat on described gas piping 17
One end of wind furnace is disposed with gas regulator 5, gas stop valve 6, gas-fired valve 7, and gas regulator 5 is electric rotating plate
Valve, specification are DN1000, play a part of to adjust gas flow, and gas stop valve 6 is electric gate valve, and specification is DN1000, plays
The effect of coal gas circulation is closed, gas-fired valve 7 is electric gate valve, and specification is DN1000, be in air and coal gas mixed combustion
Front to gas flow control with play a part of control burning；Also set on pipeline between gas regulator 5 and gas stop valve 6
A coal gas evacuation conduit is equipped with, gas bleeding valve 8 on the pipeline, is provided with, gas bleeding valve 8 is sluice valve driven by manpower, specification is
DN1000；
Described chimney 16 is connected with described gas preheater 19, air preheater 20 by pipeline；
Hot air duct and flue, exhaust piping is additionally provided with described hot-blast stove, near hot blast on hot air duct
One end of stove is provided with hot-blast valve 4, and hot-blast valve 4 is electric gate valve, and specification is DN1000, control hot air duct output opening and closing, heat
The output end of wind pipeline is divided into two-way, is connected with blast furnace all the way, and another road is used for shunting hot blast, and this is provided with refluence damping down all the way
Valve 13, it is electric gate valve to flow backwards damping down valve 13, and specification is DN700, starts to control the effect for heating the opening and closing of wind-fall stream；Flue and heat
One end of wind furnace connection is provided with chimney valve 9, and chimney valve 9 is electric gate valve, and specification is DN1300, starts to control the opening and closing of tobacco curing feed channel
Effect；One end that exhaust piping is connected with hot-blast stove is provided with exhaust gas valve 12, and exhaust gas valve 12 is electronic angle-style valve, and specification is
DN300, plays opening and closing exhaust piping, converges into gas preheater 19, air preheat after flue, exhaust piping output
Device 20, is connected with chimney 16 after flue gas waste gas filter；
Described air blast output cold wind is divided into two-way, leads up to cold air duct and is connected with hot-blast stove, another Lu Yure
Wind pipeline converges connection, and the one end for entering hot-blast stove on cold air duct is disposed with cold wind stop valve 10, cold air adjusting valve 11,
Cold wind stop valve 10 is electric gate valve, and specification is DN1000, plays the cold wind action of cut-out, and cold air adjusting valve 11 is electric gate valve,
Specification is DN900, starts to control the effect of refrigeration wind flow；Converge with hot air duct the one end being connected be provided with mixed wind stop valve 14,
Mixed wind regulating valve 15；Mixed wind stop valve 14 is electric gate valve, and specification is DN600, plays cut-out cold wind before cold wind is mixed with hot blast
Effect, it is electric gate valve to mix wind regulating valve 15, and specification is DN600, starts to control the effect of refrigeration wind flow；
As shown in Fig. 2 a kind of blast-furnace hot-air furnace apparatus cold wind intelligent regulating system, including PLC 24, pressure part
25 and the cold air adjusting valve 11 of the one end for entering hot-blast stove is arranged on cold air duct, described cold air adjusting valve 11 is electronic
Gate valve, is connected with described PLC 24 by controlling cable；Described pressure part 25 is wind pressure sensor, is arranged on
On hot-blast stove cold air blast pipeline, it is connected with described PLC 24 by controlling cable；
Situation is controlled for the ease of manual monitoring cold wind, in the system, also includes host computer display 26；Described is upper
Machine display 26 is connected with described PLC 24 by communication cable.
A kind of blast-furnace hot-air furnace apparatus of the present utility model, due to its cold wind intelligent regulating system using PLC come
Control cold air adjusting valve, compare adjust manually more intelligent, become more meticulous, during stove is changed, the system constantly gathers cold wind
Pressure and the variable quantity of flow, writing by program, when cold wind pressure and flow changing value more than setting value (adjustable) or
Rate of change is more than setting value (adjustable), and intelligent controlling device output block, valve opening are temporarily locked；When cold wind pressure and flow
Changing value or rate of change continue valve opening after tending towards stability, and are effectively controlled the fluctuation of cold wind pressure, it is to avoid occur because valve is opened
The error signal of angle value causes blast furnace to break wind.
In the present embodiment hot-blast stove be regenerative hot blast stove, including combustion chamber and regenerator, both in same furnace shell,
Combustion chamber bottom is burner, and burner two ends connect gas piping and air duct respectively, and combustion chamber middle and lower part has hot blast to go out
Mouthful；Building in accumulation of heat room has one checker brick of multi-layer efficient heat-storing material, grate of the checker brick in regenerator by regenerator bottom
And pillar is supported, regenerator bottom connection flue, exhaust piping and cold air duct；Combustion chamber and regenerator are a kind of cylinders
Shape structure, building between them has fire resisting brick baffle, and coal gas sends into burner by gas piping, and coal gas is produced in combustion chambers burn
High heat smoke, flue gas are flowed up, through vault change direction, be downwardly into regenerator, high-temperature flue gas through checker brick, by grid
Brick is heated and itself gradually cools down, and then discharges chimney (flue gas and waste gas conveying 21 in Fig. 1) through flue；Checker brick are heated simultaneously
After the certain heat of storage, stop burning, switch to blow by burning, on air, cold wind is by air blast by cold air duct (figure
In 1,22) cold wind conveying blasts hot-blast stove, and cold wind is flowed up in regenerator, through the checker brick of multilayer hyperpyrexia, from bottom to top
Heated by checker brick, become hot blast and send from the hot air duct outlet of combustion chamber, then mixed with a certain amount of cold wind, to advise
Fixed wind-warm syndrome, sends into blast furnace (to blast-furnace hot-air conveying 23 in Fig. 1) through hot air duct；With the cooling of checker brick, hot-blast outlet
Temperature is gradually lowered, and when the wind pushing temperature that can not maintain to specify, is converted into again burning.
Embodiment 2
A kind of blast-furnace hot-air furnace apparatus, are further improved on the basis of embodiment 1：Air control valve 1 and coal gas are adjusted
Section valve 2 is connected with described PLC 24 by controlling cable, to realize the production management that more becomes more meticulous.
Claims (8)
1. a kind of blast-furnace hot-air furnace apparatus cold wind intelligent regulating system, it is characterised in that：Including PLC (24), pressure portion
Part (25) and cold air adjusting valve (11), described cold air adjusting valve (11) are electric gate valve, by controlling cable and described PLC
Controller (24) connects；Described pressure part (25) is arranged on hot-blast stove cold air blast pipeline, by control cable with described
PLC (24) connects.
2. a kind of blast-furnace hot-air furnace apparatus cold wind intelligent regulating system according to claim 1, it is characterised in that：Described
Pressure part (25) is wind pressure sensor.
3. a kind of blast-furnace hot-air furnace apparatus cold wind intelligent regulating system according to claim 2, it is characterised in that：Also include
Host computer display (26)；Described host computer display (26) is connected with described PLC (24) by communication cable.
4. a kind of blast-furnace hot-air furnace apparatus, including cold air duct, it is characterised in that：Also include that the one kind described in claim 1 is high
Stove hot-blast furnace equipment cold wind intelligent regulating system, described cold air adjusting valve (11) are arranged on described cold air duct near storage
The one end in hot cell；Described pressure part (25) is arranged on cold air duct the one end away from regenerator.
5. a kind of blast-furnace hot-air furnace apparatus according to claim 4, it is characterised in that：Including three hot-blast stoves, and each
A cold air adjusting valve (11) is provided with the cold air duct of the hot-blast stove connection described in platform.
6. a kind of blast-furnace hot-air furnace apparatus according to claim 5, it is characterised in that：Described cold air adjusting valve (11) with
Cold wind stop valve (10) is additionally provided with cold air duct between described hot-blast stove.
7. a kind of blast-furnace hot-air furnace apparatus according to claim 6, it is characterised in that：Described cold wind stop valve (10) is
Electric gate valve.
8. a kind of blast-furnace hot-air furnace apparatus according to claim 4-6 any one, it is characterised in that：Air duct, coal
Air control valve (1) and gas regulator (2) is respectively arranged with feed channel；Described air control valve (1) and coal gas are adjusted
Valve (2) is connected with described PLC (24) by controlling cable.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621101160.6U CN206014993U (en) | 2016-09-30 | 2016-09-30 | A kind of blast-furnace hot-air furnace apparatus and its cold wind intelligent regulating system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621101160.6U CN206014993U (en) | 2016-09-30 | 2016-09-30 | A kind of blast-furnace hot-air furnace apparatus and its cold wind intelligent regulating system |
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| CN206014993U true CN206014993U (en) | 2017-03-15 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107937645A (en) * | 2017-12-21 | 2018-04-20 | 安徽马钢自动化信息技术有限公司 | Changing-over stove operates anti-breaking wind system and method |
| CN108004358A (en) * | 2017-12-27 | 2018-05-08 | 中冶京诚工程技术有限公司 | Control System of Airheater |
| CN112226562A (en) * | 2020-10-27 | 2021-01-15 | 山东莱钢永锋钢铁有限公司 | Hot air temperature automatic regulation protection system |
-
2016
- 2016-09-30 CN CN201621101160.6U patent/CN206014993U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107937645A (en) * | 2017-12-21 | 2018-04-20 | 安徽马钢自动化信息技术有限公司 | Changing-over stove operates anti-breaking wind system and method |
| CN108004358A (en) * | 2017-12-27 | 2018-05-08 | 中冶京诚工程技术有限公司 | Control System of Airheater |
| CN112226562A (en) * | 2020-10-27 | 2021-01-15 | 山东莱钢永锋钢铁有限公司 | Hot air temperature automatic regulation protection system |
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