CN102337367B - 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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- CN102337367B CN102337367B CN201110321623.5A CN201110321623A CN102337367B CN 102337367 B CN102337367 B CN 102337367B CN 201110321623 A CN201110321623 A CN 201110321623A CN 102337367 B CN102337367 B CN 102337367B
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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 control method field, particularly the wind turning control method of Blast Furnace Blower System.
Background technology
In smelter, blast furnace blowing engine is gas compression machinery from required cold wind to Iron Works supply that smelt, is called as " heart " of blast furnace system.If the cold wind of supplying to blast furnace is due to catastrophic failure or the mishandle of air feed system, and there is sudden and unexpected interruption Unpredictability, to cause the major accident of slag tuyere, also will cause tremendous economic loss to enterprise, and also can make the major injury of blast furnace own.What is more, if blasted because fan parking causes blast furnace gas refluence, will directly threaten the safety of the person and equipment.Therefore, reliable and stable air dispensation system be ensure that blast furnace is normal, the prerequisite of safety, stably manufactured.
Existing blast furnace air dispensation system mostly is 1 pair 1, and safety coefficient is inadequate, sometimes because system device moves not in time, still exists blast furnace to fill with the 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 the method can realize different system operation, and can effectively guarantee that blast furnace safety is produced, reduction blast furnace is filled with slag casualty ratio of accidents.
The present invention solves its technical problem and adopts following technical scheme:
In multiple blast furnace production process, if wherein the blower fan of 2 above blast furnaces breaks down simultaneously, the now closure of check ring of these fault fan outlets, 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 2 described above blast furnaces breaks down, the closure of check ring of these fault fan outlets, and this vacuum breaker is not in manual mode, and this is first signal, whether now detect cold-air duct upward pressure that these fault blower fans are corresponding lower than 150Kpa;
Step 2: if first signal detecting result lower than 150KPa, this is second signal, detects the in addition cold-air duct pressure corresponding to blower fan of normal blast furnace and whether is greater than 250Kpa;
Step 3: in the time that whether cold-air duct pressure corresponding to blower fan that detects in addition normal blast furnace is greater than 250Kpa, if the cold-air duct pressure of other blast furnace is greater than 250KPa, this is the 3rd signal, simultaneously to the blast furnace wind turning of breaking down because of blower fan.
In aforesaid method, each wind turning Controlling System all should be provided with manual and automatic two states, in the time of certain blast furnace staying, wind turning Controlling System on the connected wind turning pipe of this blast furnace is all got to manual mode, now wind turning Controlling 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 to wind turning operation.
In aforesaid method, in the time of the wind turning of wind turning Controlling System, require to provide a wind turning signal fan Controlling System, this signal provides by hardwire, receives this signal blower fan and automatically cancels and determine air quantity and determine blast state.
The present invention compared with prior art, has following main beneficial effect:
1. arbitrary blast furnace, except normal blast channel, all also has the emergent wind turning passage of two other, guarantees to maintain the air quantity that its limit is produced;
2. can guarantee that a wind turning Controlling System can carry out wind turning action to two blast furnaces simultaneously, avoid the air-blast system out of order limiting case simultaneously of two blast furnaces under limiting case;
3. can guarantee that in system, any Fans, in the time of maintenance, still at least also has a Fans that wind turning service can be provided;
4. in can be before and after the wind turning valve of each wind turning Controlling System, all there be two trip valves in certain aperture (30%) limited flow, be used for avoiding the too large and impact that the production of other blast furnaces self is caused of air quantity fluctuation when wind turning valve is opened (standard-sized sheet) soon in the time of wind turning.
5. the control of wind turning variable valve design adopts circuit and gas circuit double-acting control, and the magnetic valve of this valve is in uncharged state at ordinary times, and effectively having solved magnetic valve affects work-ing life in electriferous state for a long time.Valve is received action command, magnetic valve obtains electric, system gas circuit is connected, valve cylinder inflation, valve reaches full-gear in 10s, if now suddenly dead electricity, while losing gas (emergency case), can make valve ensure aperture at that time by the pressurized air being full of in cylinder, this design had solved in the past simple circuit or gas circuit control, if suddenly dead electricity, losing air valve can unexpected standard-sized sheet or the disadvantage of 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 can realize different system operation time, and there is advantages such as can effectively guaranteeing blast furnace safety is produced, reduction blast furnace filling slag casualty ratio of accidents.
Brief description of the drawings
Fig. 1 is the wind turning Controlling System structural representation of the Blast Furnace Blower System that adopts of the present invention.
Fig. 2 is the layout schematic diagram of wind turning control system equipment.
Fig. 3 is taking 1# and 2# blast furnace blower (3# the blast furnace blower is normally worked) schema as example that breaks down simultaneously.
In figure: 1. gas blower; 2. electric motor; 3. vacuum breaker; 4. sourdine; 5. under meter; 6. air-supply electric butterfly valve; 7. be communicated with electric butterfly valve; 8. butterfly valve is cut off in wind turning; 9. wind turning variable valve; 10. connect the cold air duct of 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 pipes.
Embodiment
Below in conjunction with embodiment and accompanying drawing, the invention will be further described.
The wind turning control method of Blast Furnace Blower System provided by the invention, specifically adopts the method comprising the following steps:
1. wind turning condition:
Taking 3 blast furnaces, 3 cold-air ducts, 4 Fans (4# blower fan is for subsequent use) and 3 supporting wind turning Controlling System as example, in the time of needs wind turning, should detect wind turning Controlling System and whether meet following three conditions, if it is carry out wind turning.
(1) vacuum breaker 3 of fault blower fan closes;
(2) a side of wind turning variable valve 9 is less than 150Kpa by wind turning one wall pressure;
(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, now the vacuum breaker of this 2 Fans outlet closes, and other 1 cold-air duct is simultaneously to 2 blast furnace wind turnings, and concrete steps are as follows:
Referring to Fig. 4, when 3 blast furnaces are normally produced, in 4 vacuum breaker, 3 vacuum breaker are opened, now:
Step 1: if 2 Fans break down, the vacuum breaker 3 of 2 Fans closes, and this vacuum breaker is not in manual mode, has 3 closure of check ring, and this is first signal, whether now detects the corresponding cold-air duct upward pressure of 2 blower fans lower than 150Kpa;
Step 2: if first signal detecting result lower than 150KPa, this is second signal, detects other 1 cold-air duct pressure and whether is greater than 250Kpa;
Step 3: in the time detecting the 3rd signal, if other 1 cold-air duct pressure is greater than 250KPa, simultaneously to the blast furnace wind turning of breaking down because of 2 Fans.
First signal is the decision signal that judges fan trouble, when fan parking for preventing that blast from pouring in down a chimney vacuum breaker and can automatically close.
Second signal is to judge the signal that when needs to start wind turning.Dial wind action and be blower fan accident time standby low discharge the wind furnace charge of holding accident blast furnace slowly fall, by reducing blast to certain level or to 0, (speed is not to producing filling slag to ensure blast-furnace body not to be produced to destruction, burn out air port), according to ironworks knowhow data blast during lower than 150kpa air dispensation system just to start action the most suitable, this parameter also can be adjusted according to 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, thinks and does not possess wind turning condition, if wind turning meeting produces considerable influence to this stove working of a furnace rashly, may cause the normal blast furnace of producing to occur filling with slag.
3. process when blast furnace staying:
Each wind turning Controlling System all should be provided with manual and automatic two states, in the time of certain blast furnace staying, on 2 wind turning pipes that this blast furnace is connected, 2 air dispensation systems are all got to manual mode, now wind turning Controlling 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 to wind turning operation.
4. blast furnace is determined when air quantity is determined blast production to process:
In the time of the wind turning of wind turning Controlling System, require to provide a wind turning signal fan Controlling System, this signal provides by hardwire, receives this signal blower fan and automatically cancels and determine air quantity and determine blast state.
The wind turning control method of Blast Furnace Blower System provided by the invention, to realize by the wind turning Controlling System of Blast Furnace Blower System, the structure of this wind turning Controlling System is as shown in Figure 1: wind turning Controlling 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, the sourdine 4 of blowing for blower fan after vacuum breaker 3, sourdine 4 is provided with under meter 5 below, under meter 5 is provided with air-supply electric butterfly valve 6 below, send many blast furnaces owing to will realizing many Fans, air-supply electric butterfly valve 6 in each wind turning Controlling System is rear is respectively equipped with 3 connection electric butterfly valves 7.Pipeline after connection electric butterfly valve 7 connects respectively the cold air duct of each blast furnace, and totally 3 is respectively cold air duct 10, the cold air duct 11 that connects 2# blast furnace that connects 1# blast furnace, the cold-air duct 12 that connects 3# blast furnace.
The present invention controls 3 wind turning Controlling System altogether, be communicated with between two 3 cold blast pipelines, wind turning pipe diameter is DN600(or determines according to practical situation), on each air dispensation system, have 2 wind turnings to cut off 8,1 wind turning variable valve 9 of butterfly valve, the normally open that butterfly valve keeps certain valve position (valve plate valve position 30%) is cut off in wind turning, during with restriction wind turning, flow can be not excessive, in order to avoid the blast furnace production working of a furnace by wind turning is exerted an influence, while needing wind turning, on this pipeline, wind turning variable valve is got to rapidly full-gear.
The place that wind turning pipeline is connected with cold air duct is provided with bend pipe pressure balance loop expansion pipe 13, to meet the needs of pipe thermal compensation, adopts U-shaped design (Fig. 2).
The control design of wind turning variable valve 9 adopts circuit and gas circuit double-acting control, and the magnetic valve of this valve is in uncharged state at ordinary times, and effectively having solved magnetic valve affects work-ing life in electriferous state for a long time.Valve is received action command, magnetic valve obtains electric, system gas circuit is connected, valve cylinder inflation, valve reaches full-gear in 10s, if now suddenly dead electricity, while losing gas (emergency case), can make valve ensure aperture at that time by the pressurized air being full of in cylinder, this design had solved in the past simple circuit or gas circuit control, if suddenly dead electricity, losing air valve can unexpected standard-sized sheet or the disadvantage of complete shut-down, makes system safer.
Result of use of the present invention: show according to tune-up data, after receiving correct signal, wind turning variable valve 9 can be got to rapidly full-gear within the 10s time, realizes wind turning operation; If the air valve of dead electricity mistake suddenly all can keep aperture at that time in the process of wind turning operation.
Claims (3)
1. the wind turning control method of a Blast Furnace Blower System, it is characterized in that in multiple blast furnace production process, if wherein the blower fan of 2 above blast furnaces breaks down simultaneously, the now closure of check ring of these fault fan outlets, 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 2 described above blast furnaces breaks down, the closure of check ring of these fault fan outlets, and this vacuum breaker is not in manual mode, and this is first signal, whether now detect cold-air duct upward pressure that these fault blower fans are corresponding lower than 150KPa;
Step 2: if first signal detecting result lower than 150KPa, this is second signal, detects the in addition cold-air duct pressure corresponding to blower fan of normal blast furnace and whether is greater than 250KPa;
Step 3: in the time that whether cold-air duct pressure corresponding to blower fan that detects in addition normal blast furnace is greater than 250KPa, if the cold-air duct pressure of other blast furnace is greater than 250KPa, this is the 3rd signal, the blast furnace wind turning of simultaneously blower fan being broken down;
In above-mentioned three signals, first signal is the decision signal that judges fan trouble, when fan parking for preventing that blast from pouring in down a chimney vacuum breaker and can automatically close;
Aforesaid method is to realize by the wind turning Controlling System of Blast Furnace Blower System, this wind turning Controlling System is communicated with 3 blast furnaces, totally 4 gas blowers and auxiliary motor, on every blower export pipeline, vacuum breaker is installed, the sourdine of blowing for blower fan after vacuum breaker, under meter is installed after sourdine, air-supply electric butterfly valve is installed after under meter.
2. the wind turning control method of Blast Furnace Blower System according to claim 1, it is characterized in that each wind turning Controlling System all should be provided with manual and automatic two states, in the time of certain blast furnace staying, wind turning Controlling System on the connected wind turning pipe of this blast furnace is all got to manual mode, now wind turning Controlling 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 to wind turning operation.
3. the wind turning control method of Blast Furnace Blower System according to claim 1, it is characterized in that in the time of the wind turning of wind turning Controlling System, requirement provides a wind turning signal fan Controlling System, and this signal provides by hardwire, receives this signal blower fan and automatically cancels and determine air quantity and determine blast state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 |
|---|---|---|---|
| CN201110321623.5A CN102337367B (en) | 2011-10-21 | 2011-10-21 | Air distributing control method for blast furnace blower system |
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| Publication Number | Publication Date |
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| CN102337367A CN102337367A (en) | 2012-02-01 |
| CN102337367B true CN102337367B (en) | 2014-07-02 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201110321623.5A Expired - Fee Related CN102337367B (en) | 2011-10-21 | 2011-10-21 | Air distributing control method for blast furnace blower system |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103409574B (en) * | 2013-08-26 | 2014-11-05 | 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 |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2254892Y (en) * | 1996-01-19 | 1997-05-28 | 唐山钢铁集团有限责任公司 | Double direction automatic wind-distribution device for blast main pipe of blast furnace |
| CN201046970Y (en) * | 2007-04-13 | 2008-04-16 | 马鞍山伏斯特科技发展有限公司 | Tuyere slag-filling preventing automatic control device for blast furnaces |
| CN201106056Y (en) * | 2007-11-08 | 2008-08-27 | 武汉钢铁(集团)公司 | Multifunctional multidirectional intelligent air supplying-dispensing device |
| CN101270400A (en) * | 2008-05-19 | 2008-09-24 | 攀枝花新钢钒股份有限公司 | Air dispensation system of multi-main pipe blast furnace |
| CN101851693A (en) * | 2009-03-31 | 2010-10-06 | 宝山钢铁股份有限公司 | Blast furnace blower redundancy anti-surge control method |
| CN201971852U (en) * | 2010-12-28 | 2011-09-14 | 天津钢铁集团有限公司 | Automatic fanning device for two blast furnaces having different volumes |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS52110205A (en) * | 1976-03-12 | 1977-09-16 | Kubota Ltd | Controller of valve changeover of hot stove |
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2011
- 2011-10-21 CN CN201110321623.5A patent/CN102337367B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2254892Y (en) * | 1996-01-19 | 1997-05-28 | 唐山钢铁集团有限责任公司 | Double direction automatic wind-distribution device for blast main pipe of blast furnace |
| CN201046970Y (en) * | 2007-04-13 | 2008-04-16 | 马鞍山伏斯特科技发展有限公司 | Tuyere slag-filling preventing automatic control device for blast furnaces |
| CN201106056Y (en) * | 2007-11-08 | 2008-08-27 | 武汉钢铁(集团)公司 | Multifunctional multidirectional intelligent air supplying-dispensing device |
| CN101270400A (en) * | 2008-05-19 | 2008-09-24 | 攀枝花新钢钒股份有限公司 | Air dispensation system of multi-main pipe blast furnace |
| CN101851693A (en) * | 2009-03-31 | 2010-10-06 | 宝山钢铁股份有限公司 | Blast furnace blower redundancy anti-surge control method |
| CN201971852U (en) * | 2010-12-28 | 2011-09-14 | 天津钢铁集团有限公司 | Automatic fanning device for two blast furnaces having different volumes |
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