CN102337367A - Air distributing control method for blast furnace blower system - Google Patents
Air distributing control method for blast furnace blower system Download PDFInfo
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- CN102337367A CN102337367A CN2011103216235A CN201110321623A CN102337367A CN 102337367 A CN102337367 A CN 102337367A CN 2011103216235 A CN2011103216235 A CN 2011103216235A CN 201110321623 A CN201110321623 A CN 201110321623A CN 102337367 A CN102337367 A CN 102337367A
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- 238000000034 method Methods 0.000 title claims abstract description 20
- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000007514 turning Methods 0.000 claims description 88
- 238000001514 detection method Methods 0.000 claims description 2
- 239000002893 slag Substances 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000007664 blowing Methods 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 230000003245 working effect Effects 0.000 description 2
- 241001062472 Stokellia anisodon Species 0.000 description 1
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
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Abstract
The invention discloses an air distributing control method for a blast furnace blower system. The method comprises the following steps that: in the production process of a plurality of blast furnaces, if fans of more than two blast furnaces in the plurality of blast furnaces fail simultaneously, check valves at the outlets of the faulted fans are closed at the moment; and cold air pipes of other blast furnaces simultaneously distribute air to the blast furnaces of which the fans fail. The method is suitable for a system in which four blast furnace blowers supply the air to three blast furnaces; by the method, mutual air distribution control during operation of different systems can be realized; and the method has the advantages of capability of effectively ensuring safe production of the blast furnaces, reducing the residue filling accident rates of the blast furnaces, and the like.
Description
Technical field
The present invention relates to the control method field, particularly the wind turning control method of Blast Furnace Blower System.
Background technology
In smelter, blast furnace blowing engine is a gas compression machinery from required cold wind to the supply of iron work blast furnace that smelt, is called as " heart " of blast furnace system.If to the cold wind of blast furnace supply because the catastrophic failure or the mishandle of air feed system; And take place sudden and unexpected interruption Unpredictability; With causing the air port to irritate the major accident of slag, also will cause the tremendous economic loss, and also can make the major injury of blast furnace own to enterprise.What is more, causes that blast furnace gas flows backwards and blast if shut down because of blower fan, will the direct threats person and the safety of equipment.Therefore, reliable and stable air dispensation system be guarantee that blast furnace is normal, the prerequisite of safety, stably manufactured.
Mostly existing blast furnace air dispensation system is 1 pair 1, and SF is not enough, sometimes because the system device action is untimely, still exists blast furnace to irritate danger such as slag.
Summary of the invention
Technical problem to be solved by this invention is: a kind of wind turning control method of Blast Furnace Blower System is provided, and the control of mutual wind turning when this method can realize the different system operation, and can effectively guarantee blast furnace safety in production, reduction blast furnace filling slag casualty ratio of accidents.
The present invention solves its technical problem and adopts following technical scheme:
In a plurality of blast furnace production process, if wherein the blower fan of the blast furnace more than 2 breaks down simultaneously, the closure of check ring of these fault blower fan outlets this moment, then the cold-air duct of blast furnace is simultaneously to the blast furnace wind turning of these blower fans that break down in addition, and concrete steps comprise:
Step 1: if the blower fan of described blast furnace more than 2 breaks down; The closure of check ring of these fault blower fans outlet then; And this vacuum breaker is not in manual state, and this is first signal, detects the corresponding cold-air duct upward pressure of these fault blower fans this moment and whether is lower than 150Kpa;
Step 2: if first signal detecting result is lower than 150KPa, this is second signal, and whether the cold-air duct pressure that then blower fan of the in addition normal blast furnace of detection is corresponding is greater than 250Kpa;
Step 3: at the corresponding cold-air duct pressure of the blower fan that detects in addition normal blast furnace during whether greater than 250Kpa, if the cold-air duct pressure of other blast furnace greater than 250KPa, this is the 3rd signal, then the blast furnace wind turning to breaking down because of blower fan simultaneously.
In the aforesaid method; Each wind turning system all should be provided with manual and automatic two states; When certain blast furnace staying, the wind turning system on the wind turning pipe that this blast furnace links to each other is all got to manual state, and wind turning this moment system does not read the correlation parameter of this wind turning variable valve; Think that this blower fan normally cuts out, it is not carried out the wind turning operation.
In the aforesaid method, when the wind turning of wind turning system, require to provide a wind turning signal fan system, this signal provides through hardwire, receive this signal blower fan automatically cancellation decide air quantity and decide the blast state.
The present invention compared with prior art has following main beneficial effect:
1. arbitrary blast furnace all also has the emergent wind turning passage of two other except that normal blast channel, guarantees to keep the air quantity that its limit is produced;
2. can guarantee that a wind turning system can carry out wind turning action simultaneously to two blast furnaces, the air-blast system of avoiding two blast furnaces under limiting case is out of order limiting case simultaneously;
3. can guarantee that any typhoon machine still also has a typhoon machine that the wind turning service can be provided at least in the system when maintenance;
4. all there are two trip valves to be in certain aperture (30%) limited flow in can be before and after the wind turning valve of each wind turning system, are used for avoiding the too big and influence that the production of other blast furnaces self is caused of air quantity fluctuation when the wind turning valve is opened (standard-sized sheet) soon when wind turning.
5. the control of wind turning variable valve design adopts circuit and gas circuit d.a. to control, and the SV of this valve is in uncharged state at ordinary times, has effectively solved SV and has been in electriferous state for a long time and influences work-ing life.Valve is received action command, and SV gets electric, and system's gas circuit is connected; Valve cylinder inflation, valve reaches full-gear in 10s, if this moment suddenly dead electricity, when losing gas (emergency case); Lean on the pressurized air that is full of in the cylinder can make valve guarantee aperture at that time; This design has solved circuit or gas circuit control merely in the past, if the disadvantage of unexpected dead electricity, the mistake air valve unexpected standard-sized sheet of meeting or complete shut-down makes system safer.
In a word, the present invention is applicable to the system of 4 blast furnace blowing engines to 3 blast furnace air feeds, the control of mutual wind turning in the time of can realizing the different system operation, and have advantages such as can effectively guaranteeing blast furnace safety in production, reduction blast furnace filling slag casualty ratio of accidents.
Description of drawings
Fig. 1 is the wind turning system structural representation of the Blast Furnace Blower System that adopts of the present invention.
Fig. 2 is the layout synoptic diagram of wind turning control system equipment.
Fig. 3 be with 1# and 2# blast furnace blower break down simultaneously (3# blast furnace blower works better) be the schema of example.
Among the figure: 1. gas blower; 2. phonomoter; 3. vacuum breaker; 4. sourdine; 5. under meter; 6. air-supply electric butterfly valve; 7. connection electric butterfly valve; 8. butterfly valve is cut off in wind turning; 9. wind turning variable valve; 10. the cold air duct that connects the 1# blast furnace; 11. connect the cold air duct of 2# blast furnace; 12. connect the cold air duct of 3# blast furnace; 13. bend pipe pressure balance loop expansion pipe.
Embodiment
Below in conjunction with embodiment and accompanying drawing the present invention is described further.
The wind turning control method of Blast Furnace Blower System provided by the invention specifically is to adopt the method that may further comprise the steps:
1. wind turning condition:
With 3 blast furnaces, 3 cold-air ducts, 4 typhoon machines (the 4# blower fan is subsequent use) and 3 supporting wind turning system is example, when the needs wind turning, should detect the wind turning system and whether satisfy following three conditions, if then carry out wind turning.
(1) vacuum breaker 3 of fault blower fan closes;
(2) side of wind turning variable valve 9 promptly by wind turning one wall pressure less than 150Kpa;
(3) the opposite side pressure of wind turning variable valve 9 is that wind turning one wall pressure is greater than 250Kpa.
2. concrete operations:
If the blower fan of 2 blast furnaces breaks down simultaneously, this moment, the vacuum breaker of this 2 typhoon machine outlet closed, and then other 1 cold-air duct is simultaneously to 2 blast furnace wind turnings, and concrete steps are following:
Referring to Fig. 4, during 3 blast furnace ordinary production, 3 vacuum breaker are opened in 4 vacuum breaker, at this moment:
Step 1: if 2 typhoon machines break down, then vacuum breaker 3 passes of 2 typhoon machines, and this vacuum breaker are not in manual state, have 3 closure of check ring, and this is first signal, detect the corresponding cold-air duct upward pressures of 2 blower fans this moment and whether are lower than 150Kpa;
Step 2: if first signal detecting result is lower than 150KPa, this is second signal, whether then detects other 1 cold-air duct pressure greater than 250Kpa;
Step 3: when detecting the 3rd signal, if other 1 cold-air duct pressure greater than 250KPa, the then blast furnace wind turning to breaking down simultaneously because of 2 typhoon machines.
First signal is a decision signal of judging fan trouble, when blower fan is shut down for preventing that blast from pouring in down a chimney vacuum breaker and can close automatically.
Second signal is to judge the signal that when need begin wind turning.The effect of wind turning be the blower fan accident the time standby low discharge the wind furnace charge of holding the accident blast furnace slowly fall; Through reducing blast to certain level or to 0; (speed is not to producing the filling slag to guarantee blast-furnace body not to be produced destruction; Burn out the air port), it is the most suitable that air dispensation system just begins action when being lower than 150kpa according to ironworks knowhow data blast, and this parameter also can be adjusted according to the ironworks needs of production.
The 3rd signal is for guaranteeing to be that wind turning one side blast furnace self is produced unaffected.If be that wind turning blast furnace self working of a furnace is bad, blast is lower, promptly thinks not possess the wind turning condition, if the wind turning meeting produces considerable influence to this stove working of a furnace rashly, possibly cause the blast furnace of ordinary production slag to occur irritating.
3. handle during blast furnace staying:
Each wind turning system all should be provided with manual and automatic two states; When certain blast furnace staying; 2 air dispensation systems are all got to manual state on 2 wind turning pipes that this blast furnace links to each other; This moment, the wind turning system did not read the correlation parameter of this wind turning variable valve, thought that this blower fan normally cuts out, and it was not carried out the wind turning operation.
4. blast furnace is decided to handle when air quantity is decided blast production:
When the wind turning of wind turning system, require to provide a wind turning signal fan system, this signal provides through hardwire, receive this signal blower fan automatically cancellation decide air quantity and decide the blast state.
The wind turning control method of Blast Furnace Blower System provided by the invention; Be that wind turning system through Blast Furnace Blower System realizes; The structure of this wind turning system is as shown in Figure 1: the wind turning system is communicated with 3 blast furnaces, totally 4 gas blowers 1 and auxiliary motor 2.On every blower export pipeline vacuum breaker 3 is installed; Vacuum breaker 3 backs are the sourdine 4 of blower fan air-supply; Sourdine 4 back are equipped with under meter 5; Under meter 5 back are equipped with air-supply electric butterfly valve 6, owing to will realize that many typhoons machine send many blast furnaces, 3 connection electric butterfly valves 7 are housed respectively behind the air-supply electric butterfly valve 6 in each wind turning system.Pipeline behind the connection electric butterfly valve 7 connects the cold air duct of each blast furnace respectively, and totally 3 is respectively cold air duct 10, the cold air duct 11 that connects the 2# blast furnace that connects the 1# blast furnace, the cold-air duct 12 that connects the 3# blast furnace.
The present invention controls 3 wind turning system altogether, is communicated with 3 cold blast pipelines in twos, and the wind turning pipe diameter is DN600 (or decide according to practical situation); Have 2 wind turnings to cut off 8,1 wind turning variable valve 9 of butterfly valve on each air dispensation system, the normally open that butterfly valve keeps certain valve position (valve plate valve position 30%) is cut off in wind turning; Flow can be not excessive during with the restriction wind turning; In order to avoid the blast furnace production working of a furnace that is about to wind turning is exerted an influence, when needing wind turning, the wind turning variable valve is got to full-gear rapidly on this pipeline.
The place that the wind turning pipeline links to each other with cold air duct is equipped with bend pipe pressure balance loop expansion pipe 13, to satisfy the needs of pipe thermal compensation, adopts U type design (Fig. 2).
The control of wind turning variable valve 9 design adopts circuit and gas circuit d.a. to control, and the SV of this valve is in uncharged state at ordinary times, has effectively solved SV and has been in electriferous state for a long time and influences work-ing life.Valve is received action command, and SV gets electric, and system's gas circuit is connected; Valve cylinder inflation, valve reaches full-gear in 10s, if this moment suddenly dead electricity, when losing gas (emergency case); Lean on the pressurized air that is full of in the cylinder can make valve guarantee aperture at that time; This design has solved circuit or gas circuit control merely in the past, if the disadvantage of unexpected dead electricity, the mistake air valve unexpected standard-sized sheet of meeting or complete shut-down makes system safer.
Result of use of the present invention: show that according to tune-up data after receiving correct signal, wind turning variable valve 9 can be got to full-gear rapidly at 10s in the time, realize the wind turning operation; In the process of wind turning operation,, unexpected dead electricity all can keep aperture at that time if losing air valve.
Claims (3)
1. the wind turning control method of a Blast Furnace Blower System; It is characterized in that in a plurality of blast furnace production process; If wherein the blower fan of the blast furnace more than 2 breaks down simultaneously; The closure of check ring of these fault blower fan outlets this moment, then the cold-air duct of blast furnace is simultaneously to the blast furnace wind turning of these blower fans that break down in addition, and concrete steps comprise:
Step 1: if the blower fan of described blast furnace more than 2 breaks down; The closure of check ring of these fault blower fans outlet then; And this vacuum breaker is not in manual state, and this is first signal, detects the corresponding cold-air duct upward pressure of these fault blower fans this moment and whether is lower than 150Kpa;
Step 2: if first signal detecting result is lower than 150KPa, this is second signal, and whether the cold-air duct pressure that then blower fan of the in addition normal blast furnace of detection is corresponding is greater than 250Kpa;
Step 3: at the corresponding cold-air duct pressure of the blower fan that detects in addition normal blast furnace during whether greater than 250Kpa, if the cold-air duct pressure of other blast furnace greater than 250KPa, this is the 3rd signal, then the blast furnace wind turning to breaking down because of blower fan simultaneously.
2. the wind turning control method of Blast Furnace Blower System according to claim 1; It is characterized in that each wind turning system all should be provided with manual and automatic two states; When certain blast furnace staying, the wind turning system on the wind turning pipe that this blast furnace links to each other is all got to manual state, and wind turning this moment system does not read the correlation parameter of this wind turning variable valve; Think that this blower fan normally cuts out, it is not carried out the wind turning operation.
3. the wind turning control method of Blast Furnace Blower System according to claim 1; It is characterized in that when the wind turning of wind turning system; Requirement provides a wind turning signal fan system, and this signal provides through hardwire, receive this signal blower fan automatically cancellation decide air quantity and decide the blast state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201110321623.5A CN102337367B (en) | 2011-10-21 | 2011-10-21 | Air distributing control method for blast furnace blower system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110321623.5A CN102337367B (en) | 2011-10-21 | 2011-10-21 | Air distributing control method for blast furnace blower system |
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| CN102337367A true CN102337367A (en) | 2012-02-01 |
| CN102337367B CN102337367B (en) | 2014-07-02 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103409574A (en) * | 2013-08-26 | 2013-11-27 | 济钢集团有限公司 | Security air system for preventing slag from entering blast furnaces |
| 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 |
| CN115927775A (en) * | 2023-01-04 | 2023-04-07 | 马鞍山钢铁股份有限公司 | Control method for blast furnace air dispensation |
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2011
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103409574A (en) * | 2013-08-26 | 2013-11-27 | 济钢集团有限公司 | Security air system for preventing slag from entering blast furnaces |
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| CN115927775A (en) * | 2023-01-04 | 2023-04-07 | 马鞍山钢铁股份有限公司 | Control method for blast furnace air dispensation |
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