CN102344980B - 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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- CN102344980B CN102344980B CN201110321625.4A CN201110321625A CN102344980B CN 102344980 B CN102344980 B CN 102344980B CN 201110321625 A CN201110321625 A CN 201110321625A CN 102344980 B CN102344980 B CN 102344980B
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- 238000004519 manufacturing process Methods 0.000 claims abstract description 8
- 238000007514 turning Methods 0.000 claims description 99
- 238000000034 method Methods 0.000 claims description 17
- 238000007664 blowing Methods 0.000 claims description 4
- 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
- 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
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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 control method field, particularly the wind turning control method of Blast Furnace Blower System in smelter.
Background technology
In smelter, blast furnace blowing engine is to Iron Works supply, to smelt the gas compression machinery of required cold wind, 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 guarantee 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: the wind turning control method that Blast Furnace Blower System in a kind of smelter is provided, 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 a plurality of blast furnace production process, if wherein the blower fan of 1 blast furnace breaks down, now the vacuum breaker of this fan outlet closes, provide a signal to wind turning Controlling System, other wind turning Controlling System starts to judge, select blast large to its wind turning, specifically comprise the following steps:
Step 1: if described 1 Fans breaks down, the vacuum breaker of this Fans closes, and this vacuum breaker is in manual mode, this is first signal, whether now detects pressure on the cold-air duct that this Fans is corresponding lower than 150Kpa;
Step 2: if first signal detecting result lower than 150Kpa, this is second signal, whether the cold-air duct pressure that detects other blast furnace is greater than 250Kpa;
Step 3: when detecting second signal, if only have 1 air duct pressure to be greater than 250KPa in blast furnace in addition, this is the 3rd signal, and this airduct wind turning is to fault blast furnace; If in addition the pressure of other airduct in blast furnace is all greater than 250KPa, select with the large cold-air duct of blast the wind turning of fault blast furnace.
In 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 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, when 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 in system, two most suitable one of emergent wind turning passage Wind pressures carry out wind turning action;
3. even if can guarantee that air dispensation system has one to break down, still guarantee to have air dispensation system to use, realized the using and the reserved design of air dispensation system;
4. can guarantee that in system, any Fans, when maintenance, still at least also has a Fans that wind turning service can be provided;
5. 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 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, 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), by the pressurized air being full of in cylinder, can make valve guarantee aperture at that time, this design has solved simple circuit or gas circuit control 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 4 blast furnace blowing engines to the system of 3 blast furnace air feeds, the control of mutual wind turning in the time of can realizing different system operation, and there is advantages such as can effectively guaranteeing blast furnace safety is produced, reduction blast furnace filling slag casualty ratio of accidents.
Accompanying drawing explanation
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 be take the 1# blast furnace blower schema that (2#3# blast furnace blower is normally worked) be example that breaks down.
In figure: 1. gas blower; 2. electric motor; 3. vacuum breaker; 4. sourdine; 5. under meter; 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 in smelter provided by the invention, specifically adopts the method comprising the following steps:
1. wind turning condition:
Take 3 blast furnaces, 3 cold-air ducts, 4 Fans (4# blower fan is standby) and 3 supporting wind turning Controlling System is example, when needs wind turning, should detect wind turning Controlling System and whether meet following three conditions, if it is carries 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 1 blast furnace breaks down, now the vacuum breaker 3 of this fan outlet closes, and provides a signal to wind turning Controlling System, and other 2 wind turning Controlling System start to judge, select blast large to its wind turning, concrete steps are as follows:
Referring to Fig. 3, when 3 blast furnaces are normally produced, in 4 vacuum breaker, 3 vacuum breaker are opened (step that had a corresponding blast furnace of selected blower fan in program before starting blower fan guarantees that blower fan and vacuum breaker are corresponding one by one), now:
Step 1: if 1 Fans breaks down, the vacuum breaker 3 of this Fans closes, and in manual mode, (each vacuum breaker does not have manually and automatic two states this vacuum breaker, get to manual mode for maintenance or other Special Circumstances, now airduct corresponding to this system do not participate in wind turning), have 2 closure of check ring, this is first signal, whether now detects cold-air duct upward pressure that this Fans is corresponding lower than 150Kpa;
Step 2: if first signal detecting result lower than 150KPa, this is second signal, detects other 2 cold-air duct pressure and whether is greater than 250Kpa;
Step 3: when detecting second signal, if only have 1 air duct pressure to be greater than 250KPa, this is the 3rd signal, and this airduct wind turning is to fault blast furnace; If 2 are all greater than 250KPa, two cold-air duct pressure relatively, select with the large cold-air duct of blast the wind turning of fault blast furnace.
First signal be judgement fan trouble decision signal, in the time of 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 guarantee 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 during blast furnace staying:
Each wind turning Controlling System all should be provided with manual and automatic two states, when 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:
When 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, that wind turning Controlling System by Blast Furnace Blower System realizes, 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, owing to will realizing many Fans, send many blast furnaces, 3 connection electric butterfly valves 7 are respectively housed after the air-supply electric butterfly valve 6 in each wind turning Controlling System.Pipeline after connection electric butterfly valve 7 connects respectively the cold air duct of each blast furnace, and totally 3 is respectively to connect the cold air duct 10 of 1# blast furnace, connect the cold air duct 11 of 2# blast furnace, connect the cold-air duct 12 of 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 exert an influence to being about to the blast furnace production working of a furnace of wind turning, 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 to 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), by the pressurized air being full of in cylinder, can make valve guarantee aperture at that time, this design has solved simple circuit or gas circuit control 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 according to tune-up data, after receiving correct signal, wind turning variable valve 9 can be got to rapidly full-gear in the time at 10s, 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 Blast Furnace Blower System in a 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, now the vacuum breaker of this fan outlet closes, provide a signal to wind turning Controlling System, other wind turning Controlling System starts to judge, select blast large to its wind turning, concrete steps comprise:
Step 1: if described 1 Fans breaks down, the vacuum breaker of this Fans closes, and this vacuum breaker is in manual mode, this is first signal, whether now detects pressure on the cold-air duct that this Fans is corresponding lower than 150kPa;
Step 2: if first signal detecting result lower than 150kPa, this is second signal, whether the cold-air duct pressure that detects other blast furnace is greater than 250kPa;
Step 3: when detecting second signal, if only have 1 air duct pressure to be greater than 250kPa in blast furnace in addition, this is the 3rd signal, and this airduct wind turning is to fault blast furnace; If in addition the pressure of other airduct in blast furnace is all greater than 250kPa, select with the large cold-air duct of blast the wind turning of fault blast furnace;
Described method is that the wind turning Controlling System by Blast Furnace Blower System realizes, and 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, after air-supply electric butterfly valve, 3 connection electric butterfly valves are respectively housed, the pipeline after connection electric butterfly valve connects respectively the cold air duct of each blast furnace.
2. the wind turning control method of Blast Furnace Blower System in 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 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 in 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 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 |
|---|---|---|---|
| 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 CN102344980A (en) | 2012-02-08 |
| CN102344980B true CN102344980B (en) | 2014-04-09 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103266193A (en) * | 2013-05-24 | 2013-08-28 | 重庆钢铁(集团)有限责任公司 | Wind transfer security system |
| 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 |
| 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 |
| CN113090952B (en) * | 2021-03-26 | 2022-03-29 | 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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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS52110205A (en) * | 1976-03-12 | 1977-09-16 | Kubota Ltd | Controller of valve changeover of hot stove |
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