CN102344980A - Air dispensation control system for blower system of blast furnace in metallurgical enterprise - Google Patents
Air dispensation control system for blower system of blast furnace in metallurgical enterprise Download PDFInfo
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- CN102344980A CN102344980A CN2011103216254A CN201110321625A CN102344980A CN 102344980 A CN102344980 A CN 102344980A CN 2011103216254 A CN2011103216254 A CN 2011103216254A CN 201110321625 A CN201110321625 A CN 201110321625A CN 102344980 A CN102344980 A CN 102344980A
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 12
- 238000007514 turning Methods 0.000 claims description 98
- 238000000034 method Methods 0.000 claims description 14
- 239000002893 slag Substances 0.000 abstract description 7
- 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
- 238000012423 maintenance Methods 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
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Abstract
The invention discloses an air dispensation control system for a blower system of a blast furnace in a metallurgical enterprise. Particularly, in the production process of a plurality of blast furnaces, if a fan of one of the blast furnaces goes wrong, a check valve at an outlet of the fan is closed and a signal is sent to the corresponding air dispensation control system; and then another air dispensation control system starts to judge and selects a cold air pipe with a high air pressure to carry out air dispensation on the blast furnace which goes wrong. Due to the adoption of the air dispensation control system, the control of mutual air dispensation when different systems operate can be realized. Moreover, the air dispensation control system has the advantages of effectively ensuring the safety production of the blast furnaces, reducing the slag entering accident rate 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 in the smelter.
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; To cause 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 safety coefficient 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: the wind turning control method that Blast Furnace Blower System in a kind of smelter is provided; 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 1 blast furnace breaks down, this moment, the vacuum breaker of this blower fan outlet closed; Provide a signal and give the wind turning Controlling System; Then other wind turning Controlling System begins to judge, select blast big to its wind turning, specifically may further comprise the steps:
Step 1: if said 1 typhoon machine breaks down, the then vacuum breaker of this typhoon machine pass, and this vacuum breaker is not in manual state, and this is first signal, and whether the pressure that detects this moment on the corresponding cold-air duct of this typhoon machine 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 detects other blast furnace is greater than 250Kpa;
Step 3: when detecting second signal, if having only 1 air duct pressure greater than 250KPa in the blast furnace in addition, this is the 3rd signal, and then the fault blast furnace is given in this airduct wind turning; If in addition the pressure of other airduct in the blast furnace is all greater than 250KPa, then select with the big cold-air duct of blast the wind turning of fault blast furnace.
In the aforesaid method; Each wind turning Controlling System all should be provided with manual and automatic two states; When certain blast furnace staying; Wind turning Controlling System on the wind turning pipe that this blast furnace links to each other is all got to manual state; Wind turning this moment 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 the wind turning operation.
In the aforesaid method, when the wind turning of wind turning Controlling System, require to provide a wind turning signal fan Controlling 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 in the system that only one of blast carries out the wind turning action in two emergent wind turning passages;
3. there is one to break down even can guarantee air dispensation system, still guarantees to have air dispensation system to use, realized the using and the reserved design of air dispensation system;
4. 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;
5. 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 Controlling 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.
6. the control of wind turning variable valve design adopts circuit and gas circuit double-acting to control, and the magnetic valve of this valve is in uncharged state at ordinary times, has effectively solved magnetic valve and has been in electriferous state for a long time and influences work-ing life.Valve is received action command; Magnetic valve gets; 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 Controlling 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 the 1# blast furnace blower break down (2#3# blast furnace blower works better) be the schema of example.
Among the figure: 1. gas blower; 2. electric motor; 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 in the smelter 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 Controlling System is example, when the needs wind turning, should detect the wind turning Controlling 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 1 blast furnace breaks down, the vacuum breaker 3 of this blower fan outlet this moment closes, and provides a signal and gives the wind turning Controlling System, and then other 2 wind turning Controlling System begin to judge, select blast big to its wind turning, concrete steps are following:
Referring to Fig. 3, during 3 blast furnace ordinary production, 3 vacuum breaker are opened (step that a corresponding blast furnace of selected blower fan was arranged in the program guarantees that blower fan and vacuum breaker are corresponding one by one) in 4 vacuum breaker before starting blower fan, at this moment:
Step 1: if 1 typhoon machine breaks down; Then the vacuum breaker 3 of this typhoon machine closes; And this vacuum breaker is not in manual state, and (each vacuum breaker all has manually and automatic two states; Get to manual state and be maintenance or other Special Circumstances; The corresponding airduct of this system this moment is not participated in wind turning); Have 2 closure of check ring, this is first signal, detects the corresponding cold-air duct upward pressure of this typhoon machine this moment and whether is lower than 150Kpa;
Step 2: if first signal detecting result is lower than 150KPa, this is second signal, whether then detects other 2 cold-air duct pressure greater than 250Kpa;
Step 3: when detecting second signal, if having only 1 air duct pressure greater than 250KPa, this is the 3rd signal, and then the fault blast furnace is given in this airduct wind turning; If 2 all greater than 250KPa, two cold-air duct pressure are relatively then selected with the big cold-air duct of blast the wind turning of fault blast furnace.
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 Controlling 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; Wind turning this moment 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 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 Controlling System, require to provide a wind turning signal fan Controlling 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 Controlling System through Blast Furnace Blower System realizes; The structure of this wind turning Controlling System is as shown in Figure 1: the 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; 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 respectively are housed behind the air-supply electric butterfly valve 6 in each wind turning Controlling 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 Controlling System altogether; Be communicated with 3 cold blast pipelines in twos; 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 double-acting to control, and the magnetic valve of this valve is in uncharged state at ordinary times, has effectively solved magnetic valve and has been in electriferous state for a long time and influences work-ing life.Valve is received action command; Magnetic valve gets; 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 Blast Furnace Blower System in the smelter; It is characterized in that in a plurality of blast furnace production process; If wherein the blower fan of 1 blast furnace breaks down; This moment, the vacuum breaker of this blower fan outlet closed; Provide a signal and give the wind turning Controlling System; Then other wind turning Controlling System begins to judge, select blast big to its wind turning, concrete steps comprise:
Step 1: if said 1 typhoon machine breaks down, the then vacuum breaker of this typhoon machine pass, and this vacuum breaker is not in manual state, and this is first signal, and whether the pressure that detects this moment on the corresponding cold-air duct of this typhoon machine 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 detects other blast furnace is greater than 250Kpa;
Step 3: when detecting second signal, if having only 1 air duct pressure greater than 250KPa in the blast furnace in addition, this is the 3rd signal, and then the fault blast furnace is given in this airduct wind turning; If in addition the pressure of other airduct in the blast furnace is all greater than 250KPa, then select with the big cold-air duct of blast the wind turning of fault blast furnace.
2. the wind turning control method of Blast Furnace Blower System in the smelter according to claim 1; It is characterized in that each wind turning Controlling System all should be provided with manual and automatic two states; When certain blast furnace staying; Wind turning Controlling System on the wind turning pipe that this blast furnace links to each other is all got to manual state; Wind turning this moment 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 the wind turning operation.
3. the wind turning control method of Blast Furnace Blower System in the smelter according to claim 1; It is characterized in that when the wind turning of wind turning Controlling System; Requirement provides a wind turning signal fan Controlling System; 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 |
|---|---|---|---|
| CN201110321625.4A CN102344980B (en) | 2011-10-21 | 2011-10-21 | Air dispensation control system for blower system of blast furnace in metallurgical enterprise |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110321625.4A CN102344980B (en) | 2011-10-21 | 2011-10-21 | Air dispensation control system for blower system of blast furnace in metallurgical enterprise |
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| CN102344980A true CN102344980A (en) | 2012-02-08 |
| CN102344980B CN102344980B (en) | 2014-04-09 |
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| CN201110321625.4A Expired - Fee Related CN102344980B (en) | 2011-10-21 | 2011-10-21 | Air dispensation control system for blower system of blast furnace in metallurgical enterprise |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243191A (en) * | 2013-05-24 | 2013-08-14 | 重庆钢铁(集团)有限责任公司 | Air dispensation safety control method |
| CN103266193A (en) * | 2013-05-24 | 2013-08-28 | 重庆钢铁(集团)有限责任公司 | Wind transfer security system |
| CN107881271A (en) * | 2017-10-19 | 2018-04-06 | 北京金自天正智能控制股份有限公司 | A kind of control method for being used for the three chain wind turnings of seat height stove |
| CN107893137A (en) * | 2017-12-21 | 2018-04-10 | 马鞍山钢铁股份有限公司 | A kind of blast furnace wind turning disconnection device and method |
| CN113090952A (en) * | 2021-03-26 | 2021-07-09 | 马鞍山钢铁股份有限公司 | Opening assisting device for check valve of large blast furnace blower unit and operation method |
Citations (5)
| 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 |
| 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 |
| 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 |
-
2011
- 2011-10-21 CN CN201110321625.4A patent/CN102344980B/en not_active Expired - Fee Related
Patent Citations (5)
| 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 |
| 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 |
| 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 |
Non-Patent Citations (3)
| Title |
|---|
| 关馨: "高炉鼓风系统中拨风装置的应用", 《科技信息》, no. 21, 31 December 2010 (2010-12-31), pages 948 * |
| 宋彬 等: "高炉供风拨风自动控制系统", 《包钢技术》, vol. 32, no. 3, 30 June 2006 (2006-06-30), pages 26 - 28 * |
| 樊丁 等: "多台高炉鼓风机拨风控制技术", 《计算机应用.风机技术》, no. 3, 31 December 2006 (2006-12-31), pages 31 - 33 * |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103243191A (en) * | 2013-05-24 | 2013-08-14 | 重庆钢铁(集团)有限责任公司 | Air dispensation safety control method |
| CN103266193A (en) * | 2013-05-24 | 2013-08-28 | 重庆钢铁(集团)有限责任公司 | Wind transfer security system |
| CN107881271A (en) * | 2017-10-19 | 2018-04-06 | 北京金自天正智能控制股份有限公司 | A kind of control method for being used for the three chain wind turnings of seat height stove |
| CN107893137A (en) * | 2017-12-21 | 2018-04-10 | 马鞍山钢铁股份有限公司 | A kind of blast furnace wind turning disconnection device and method |
| CN113090952A (en) * | 2021-03-26 | 2021-07-09 | 马鞍山钢铁股份有限公司 | Opening assisting device for check valve of large blast furnace blower unit and operation method |
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