CN105420435A - Automatic blast furnace air adjusting system and air adjusting method for metallurgic industry - Google Patents
Automatic blast furnace air adjusting system and air adjusting method for metallurgic industry Download PDFInfo
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- CN105420435A CN105420435A CN201510956038.0A CN201510956038A CN105420435A CN 105420435 A CN105420435 A CN 105420435A CN 201510956038 A CN201510956038 A CN 201510956038A CN 105420435 A CN105420435 A CN 105420435A
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- blast furnace
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- air supply
- wind turning
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B9/00—Stoves for heating the blast in blast furnaces
- C21B9/10—Other details, e.g. blast mains
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
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- Chemical & Material Sciences (AREA)
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- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Waste-Gas Treatment And Other Accessory Devices For Furnaces (AREA)
Abstract
The invention relates to an automatic blast furnace air adjusting system and air adjusting method for metallurgic industry. The system comprises a first blast furnace (1), a second blast furnace (2), a first fan (3) and a second fan (4), wherein the first fan (3) supplies the first blast furnace (1) with air, and a first check valve (5-1) and a first air supply valve (5-2) are sequentially mounted on an air supply pipeline of the first blast furnace (1); and the second fan (4) supplies the second blast furnace (2) with air, and a second check valve (6-1) and a second air supply valve (6-2) are sequentially mounted on the air supply pipeline of the second blast furnace (2). The automatic blast furnace air adjusting system and air adjusting method have the advantages that the air adjusting system is designed between the air supply pipelines of the two blast furnaces; when one fan fails in supplying air, the air adjusting system allocates one part of air supplied by the fan supplying the other blast furnace with air to the blast furnace with air supply failure so as to ensure that the blast furnace depending on the air supply of the failure fan does not have slags and ensure that all air ducts are repaired without affecting work until all the air ducts are restored; and therefore, the normal production of the blast furnaces is ensured, and safety accidents caused by coal gas backflow and the like are avoided.
Description
Technical field
The present invention relates to metallurgy high furnace, be specifically related to a kind of blast furnace in metallurgical industry automatic fanning system and wind turning method thereof.
Background technology
In Metallurgical industry, blast furnace air feed is very important link, and the reliability of blast furnace air feed directly affects the normal production of blast furnace.Blast furnace axial compressor is the gas compression machinery smelting required cold wind to iron-smelting blast furnace supply.The process that blast-furnace smelting is produced is that cold wind enters blast furnace burner hearth by blast-furnace tuyere after hotblast stove heating, provides combustion air and support furnace charge for blast furnace ironmaking process.Because a variety of causes may cause compressor to be shut down suddenly; cold wind generation to blast furnace supply is sudden to be interrupted suddenly with air feed that is Unpredictability; cause blast furnace pressure of air supply bust; blast furnace burden is sat material because of gravity and is even caused the generation of the great industrial accidents such as the large filling slag of blast-furnace tuyere, belly pipe, elbow; not only cause the direct economic loss changing air port; and because to stop production and to recover the indirect loss of the working of a furnace larger; and blast furnace itself also can be made to be subject to major injury; have a strong impact on conditions of blast furnace, shorten the operation of blast furnace life-span.
When the blower fan run breaks down suddenly emergency stop, if before being now in blast furnace casting, then can cause the serious accident of blast-furnace tuyere pour slag, blast furnace is forced to urgent damping down.And generally; blast furnace blower system jam emergency stop; and make the blast furnace wind that breaks form slag tuyere, when sitting the serious accident such as material; change by the air-supply arrangement such as air port, airduct of filling with slag, need 8 to 16h the soonest, through the furnace condition recovery of to three day; resume production and even need the longer time; and the heavy economic losses of hundreds of many ten thousand yuan/time can be caused, if blasted because blower fan tripping operation causes blast furnace gas to flow backwards, then directly threaten the person and device security.
After blast furnace compressor force outage, blast can be made to reduce rapidly, and axial compressor taking about 90 minutes from starting to normal work, to break wind to prevent blast furnace so can not take to open the effective measure such as reserve machine in advance.And after the generation of blast furnace compressor accident, operator have certain reaction times, and more chaotic, artificial wind turning operation can not reach the requirement of system.
Summary of the invention
The object of the present invention is to provide a kind of blast furnace in metallurgical industry automatic fanning system and wind turning method thereof; solving blast furnace in current Metallurgical industry cannot avoid because fault causes unexpected fan parking; form slag tuyere, sit the serious accident such as material, even occur causing blast furnace gas to flow backwards the problem of blasting because blower fan trips.
For solving above-mentioned technical problem, the present invention by the following technical solutions:
A kind of blast furnace in metallurgical industry automatic fanning system, comprise the first blast furnace, the second blast furnace, the first blower fan and the second blower fan, described first blower fan is the first blast furnace air-supply, and its air supply duct is provided with successively the first reverse checkvalve, the first blow valve, described second blower fan is the first blast furnace air-supply, and its air supply duct is provided with successively the second reverse checkvalve, the second blow valve;
Have wind turning pipeline, its one end is connected to the air supply duct between described first blow valve to the first blast furnace, and the other end is connected to the air supply duct between described second blow valve to the second blast furnace, and described wind turning pipelining has wind turning valve; The first pressure extraction element and the second pressure extraction element is respectively arranged with on the air supply duct of described first blast furnace air intake vent and on the air supply duct of the second blast furnace air intake vent;
The top pressure gathering device of described first pressure extraction element, the second pressure extraction element, the first blast furnace and the top equal signal of pressure gathering device of the second blast furnace are connected to PID controller, and described PID control, the first blow valve second blow valve and wind turning valve and all signal are connected to PLC.
Further, described wind turning pipeline is positioned at wind turning valve both sides and is separately installed with the first electric butterfly valve and the second electric butterfly valve, described first electric butterfly valve and the equal signal of the second electric butterfly valve are connected to PLC.
A kind of blast furnace in metallurgical industry automatic fanning method, comprises the following steps:
Overlap joint wind turning pipeline, one end of wind turning pipeline is connected to the air supply duct between described first blow valve to the first blast furnace, and the other end is connected to the air supply duct between described second blow valve to the second blast furnace, described wind turning pipelining wind turning valve;
The air supply duct pressure at the first blast furnace air intake vent place is gathered by the first pressure extraction element, the air supply duct pressure that the second blast furnace air intake vent goes out is gathered by the second pressure extraction element, gathered the force value of the first blast furnace and the second blast furnace by top pressure gathering device respectively, the pressure value information collected is transferred to PID controller;
The pressure value information collected and the safe pressure value preset in PID controller are compared judgement by PID controller;
If judge to show that force value in the first blast furnace or the second blast furnace is lower than the safe pressure value preset, then show that corresponding first blower fan or the second blower fan break down;
Then control the ducted wind turning valve of wind turning by PLC to open, increase the circulation of the blow valve of normal blower fan simultaneously, realize quick wind turning, if judge to show that force value in the first blast furnace or the second blast furnace is greater than or equal to the safe pressure value preset, then wind turning valve closes.
Further, described wind turning pipeline is positioned at wind turning valve both sides and is separately installed with the first electric butterfly valve and the second electric butterfly valve, described first electric butterfly valve and the equal signal of the second electric butterfly valve are connected to PLC.
Compared with prior art, the invention has the beneficial effects as follows:
Air dispensation system is designed between two blast furnace air supply lines, when wherein a Fans breaks down disconnected wind, wind supply quantity to the blower fan of other blast furnace air feed is alloted the blast furnace of part supply fault blowing-out by air dispensation system, to ensure the unlikely filling slag of blast furnace of this fault blower fan institute air feed, ensure that all air channels are keeped in repair under the prerequisite of work, until recover, thus guarantee the normal production of this blast furnace, stop the security incident that coal gas refluence etc. brings.
Accompanying drawing explanation
Fig. 1 is the structure distribution figure of a kind of blast furnace in metallurgical industry automatic fanning of the present invention system.
Fig. 2 is the FB(flow block) of a kind of blast furnace in metallurgical industry automatic fanning of the present invention method.
Embodiment
In order to make object of the present invention, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the present invention, be not intended to limit the present invention.
Fig. 1 illustrates an embodiment of a kind of blast furnace in metallurgical industry of the present invention automatic fanning system: a kind of blast furnace in metallurgical industry automatic fanning system, comprise the first blast furnace 1, second blast furnace 2, first blower fan 3 and the second blower fan 4, described first blower fan 3 is that the first blast furnace 1 is blown, and its air supply duct is provided with successively the first reverse checkvalve 5-1, the first blow valve 5-2, described second blower fan 4 is that the first blast furnace 2 is blown, and its air supply duct is provided with successively the second reverse checkvalve 6-1, the second blow valve 6-2; Have wind turning pipeline 7, its one end is connected to the air supply duct between described first blow valve 5-2 to the first blast furnace 1, and the other end is connected to the air supply duct between described second blow valve 6-2 to the second blast furnace 2, and described wind turning pipeline 7 is provided with wind turning valve 7-2; The first pressure extraction element 5-3 and the second pressure extraction element 6-3 is respectively arranged with on the air supply duct of described first blast furnace 1 air intake vent and on the air supply duct of the second blast furnace 2 air intake vent; The top pressure gathering device of described first pressure extraction element 5-3, the second pressure extraction element 6-3, the first blast furnace 1 and the top equal signal of pressure gathering device of the second blast furnace 2 are connected to PID controller, and described PID control, the first blow valve 5-2, the second blow valve 6-2 and wind turning valve 7-2 and equal signal are connected to PLC.
According to another embodiment of a kind of blast furnace in metallurgical industry automatic fanning of the present invention system, described wind turning pipeline 7 is positioned at wind turning valve 7-2 both sides and is separately installed with the first electric butterfly valve 7-1 and the second electric butterfly valve 7-3, described first electric butterfly valve 7-1 and the equal signal of the second electric butterfly valve 7-3 are connected to PLC.
Described first electric butterfly valve 7-1 and the second electric butterfly valve 7-3 normality be opened condition, only when needs overhaul wind turning valve or test, just the first electric butterfly valve 7-1 and the second electric butterfly valve 7-3 is closed.And the wind turning valve 7-2 normality of centre is closure state, just can open rapidly when the first blower fan 3 or the second blower fan 4 break down and shut down.
The principle of work of a kind of blast furnace in metallurgical industry automatic fanning of the present invention system is: when a Fans occur fan trouble break landscape condition time, this air dispensation system is by the wind supply quantity of the blower fan of other blast furnace air feed, automatic adjustment and non-linear or time the blast furnace alloting part supply fault blowing-out that becomes, to ensure the unlikely filling slag of blast furnace of this fault blower fan institute air feed, ensure that all air channels are keeped in repair under the prerequisite of work, until recover, thus guarantee the normal production of this blast furnace, stop the security incident that coal gas refluence etc. brings.
Fig. 2 shows an embodiment of a kind of blast furnace in metallurgical industry automatic fanning of the present invention method, and composition graphs 1 is known: a kind of blast furnace in metallurgical industry automatic fanning method, comprises the following steps:
Overlap joint wind turning pipeline 7, one end of wind turning pipeline 7 is connected to the air supply duct between described first blow valve 5-2 to the first blast furnace 1, the other end is connected to the air supply duct between described second blow valve 6-2 to the second blast furnace 2, and wind turning valve 7-2 installed by described wind turning pipeline 7;
The air supply duct pressure at the first blast furnace 1 air intake vent place is gathered by the first pressure extraction element 5-3, the air supply duct pressure that the second blast furnace 2 air intake vent goes out is gathered by the second pressure extraction element 6-3, gathered the force value of the first blast furnace 1 and the second blast furnace 2 by top pressure gathering device respectively, the pressure value information collected is transferred to PID controller;
The pressure value information collected and the safe pressure value preset in PID controller are compared judgement by PID controller;
If judge to show that force value in the first blast furnace 1 or the second blast furnace 2 is lower than the safe pressure value preset, then show that corresponding first blower fan 3 or the second blower fan 4 break down;
The wind turning valve 7-2 then controlled in wind turning pipeline 7 by PLC is opened, increase the circulation of the blow valve of normal blower fan simultaneously, realize quick wind turning, if judge to show that force value in the first blast furnace 1 or the second blast furnace 2 is greater than or equal to the safe pressure value preset, then wind turning valve 7-2 closes.
According to another enforcement of a kind of blast furnace in metallurgical industry automatic fanning of the present invention method, described wind turning pipeline 7 is positioned at wind turning valve 7-2 both sides and is separately installed with the first electric butterfly valve 7-1 and the second electric butterfly valve 7-3, described first electric butterfly valve 7-1 and the equal signal of the second electric butterfly valve 7-3 are connected to PLC.
PID controller realizes dynamic adjustments PID and regulates, because PID set-point is two-way variable, so be changed to Nonlinear Adjustment at it, and set up variation model early stage in operation, and carry out corrected parameter according to the time limit, by the scale-up factor to PID controller, integral time and differential time size adjustment carry out preset security force value, the determination of safe pressure value is according to system mathematic model, Theoretical Calculation determination controller parameter, carries out adjusting and revise eventually through engineering is actual.
The present invention also has the following advantages:
1, adopt computer automation to control, wind turning effect is obvious rapidly, improves security, prevents from filling with slag.
2, adopt non-linear or time become automated closed-loop Controlling Technology, lack landscape condition according to fault blast furnace air feed loop and automatically control, reduce and manually incur loss through delay the financial loss caused;
3, non-linear or time become the fluctuation brought that automated closed-loop Controlling Technology can revise Linear Control, reach steadily excessively.
4, this Controlling Technology at utmost can ensure the normal operation of borrowing wind blast furnace wind path, is unlikely to lack wind effect safety because borrowing wind.
5, can effectively prevent from this Controlling Technology flowing backwards the danger brought because of coal gas.
6, this Controlling Technology at utmost protects the subnormal production of blast furnace, reduces the loss because fault causes.
Although with reference to multiple explanatory embodiment of the present invention, invention has been described here, but, should be appreciated that, those skilled in the art can design a lot of other amendment and embodiment, these amendments and embodiment will drop within spirit disclosed in the present application and spirit.More particularly, in the scope of, accompanying drawing open in the application and claim, multiple modification and improvement can be carried out to the building block of subject combination layout and/or layout.Except the distortion carried out building block and/or layout and improving, to those skilled in the art, other purposes also will be obvious.
Claims (4)
1. a blast furnace in metallurgical industry automatic fanning system, it is characterized in that: comprise the first blast furnace (1), the second blast furnace (2), the first blower fan (3) and the second blower fan (4), described first blower fan (3) is the first blast furnace (1) air-supply, and its air supply duct is provided with successively the first reverse checkvalve (5-1), the first blow valve (5-2), described second blower fan (4) is the first blast furnace (2) air-supply, and its air supply duct is provided with successively the second reverse checkvalve (6-1), the second blow valve (6-2); There is wind turning pipeline (7), its one end is connected to the air supply duct between described first blow valve (5-2) to the first blast furnace (1), the other end is connected to the air supply duct between described second blow valve (6-2) to the second blast furnace (2), and described wind turning pipeline (7) is provided with wind turning valve (7-2); The first pressure extraction element (5-3) and the second pressure extraction element (6-3) is respectively arranged with on the air supply duct of described first blast furnace (1) air intake vent and on the air supply duct of the second blast furnace (2) air intake vent; The top pressure gathering device of described first pressure extraction element (5-3), the second pressure extraction element (6-3), the first blast furnace (1) and the top equal signal of pressure gathering device of the second blast furnace (2) are connected to PID controller, and described PID control, the first blow valve (5-2), the second blow valve (6-2) and wind turning valve (7-2) and equal signal are connected to PLC.
2. a kind of blast furnace in metallurgical industry automatic fanning system according to claim 1, it is characterized in that: described wind turning pipeline (7) is positioned at wind turning valve (7-2) both sides and is separately installed with the first electric butterfly valve (7-1) and the second electric butterfly valve (7-3), described first electric butterfly valve (7-1) and the second electric butterfly valve (7-3) all signal are connected to PLC.
3. a blast furnace in metallurgical industry automatic fanning method, is characterized in that comprising the following steps:
Overlap joint wind turning pipeline (7), one end of wind turning pipeline (7) is connected to the air supply duct between described first blow valve (5-2) to the first blast furnace (1), the other end is connected to the air supply duct between described second blow valve (6-2) to the second blast furnace (2), and described wind turning pipeline (7) installs wind turning valve (7-2);
The air supply duct pressure at the first blast furnace (1) air intake vent place is gathered by the first pressure extraction element (5-3), the air supply duct pressure that the second blast furnace (2) air intake vent goes out is gathered by the second pressure extraction element (6-3), gathered the force value of the first blast furnace (1) and the second blast furnace (2) by top pressure gathering device respectively, the pressure value information collected is transferred to PID controller;
The pressure value information collected and the safe pressure value preset in PID controller are compared judgement by PID controller;
If judge to show that force value in the first blast furnace (1) or the second blast furnace (2) is lower than the safe pressure value preset, then show that corresponding first blower fan (3) or the second blower fan (4) break down;
The wind turning valve (7-2) then controlled in wind turning pipeline (7) by PLC is opened, increase the circulation of the blow valve of normal blower fan simultaneously, realize quick wind turning, if judge to show that force value in the first blast furnace (1) or the second blast furnace (2) is greater than or equal to the safe pressure value preset, then wind turning valve (7-2) closes.
4. a kind of blast furnace in metallurgical industry automatic fanning method according to claim 3, it is characterized in that: described wind turning pipeline (7) is positioned at wind turning valve (7-2) both sides and is separately installed with the first electric butterfly valve (7-1) and the second electric butterfly valve (7-3), described first electric butterfly valve (7-1) and the second electric butterfly valve (7-3) all signal are connected to PLC.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510956038.0A CN105420435A (en) | 2015-12-18 | 2015-12-18 | Automatic blast furnace air adjusting system and air adjusting method for metallurgic industry |
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| CN201510956038.0A CN105420435A (en) | 2015-12-18 | 2015-12-18 | Automatic blast furnace air adjusting system and air adjusting method for metallurgic industry |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108266217A (en) * | 2018-01-30 | 2018-07-10 | 广州地铁设计研究院有限公司 | Metro station tunnel heat-extraction system |
| CN111996326A (en) * | 2020-10-10 | 2020-11-27 | 马鞍山钢铁股份有限公司 | Air distribution device of metallurgical blast furnace and control method thereof |
| CN115491448A (en) * | 2022-09-14 | 2022-12-20 | 山东莱钢永锋钢铁有限公司 | Blast furnace cold air security system and method |
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| CN115491448A (en) * | 2022-09-14 | 2022-12-20 | 山东莱钢永锋钢铁有限公司 | Blast furnace cold air security system and method |
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Application publication date: 20160323 |
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