CN102337368A - Air dispensation control systems for air blowing systems of blast furnaces - Google Patents
Air dispensation control systems for air blowing systems of blast furnaces Download PDFInfo
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- CN102337368A CN102337368A CN2011103216216A CN201110321621A CN102337368A CN 102337368 A CN102337368 A CN 102337368A CN 2011103216216 A CN2011103216216 A CN 2011103216216A CN 201110321621 A CN201110321621 A CN 201110321621A CN 102337368 A CN102337368 A CN 102337368A
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Abstract
The invention discloses air dispensation control systems for air blowing systems of blast furnaces, and the structure is as follows: a plurality of air dispensation control systems are arranged, and each air dispensation control system is provided with an air blower (1) and an electric motor (2) which are used for air supply of a blast furnace; and a check valve (3), a muffler (4) for supplying air to the blower, a flow meter (5) and an air-supplying electric butterfly valve (6), which are sequentially arranged, are connected on an outlet pipeline of each air blower (1) in series, the air-supplying electric butterfly valves (6) are connected with cold air pipes of all the blast furnaces through branch pipelines, and a communicating electric butterfly valve (7) is mounted on each branch pipeline, thereby constituting an air dispensation channel. The air dispensation control systems are suitable for the systems using four blast furnace air blowers to supply the air to three blast furnaces, can realize the control of mutual air dispensation during the operation of the different systems, and further have the advantages of effectively ensuring the safe production of the blast furnaces, reducing the slag filling accident rate of the blast furnaces and the like.
Description
Technical field
The present invention relates to the system field, particularly the wind turning system 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: the wind turning system that a kind of Blast Furnace Blower System is provided; The control of mutual wind turning when this wind turning system can realize different blast furnace operation, and can guarantee the blast furnace safety in production effectively, reduce blast furnace and irritate the slag casualty ratio of accidents.
The present invention solves its technical problem and adopts following technical scheme:
The wind turning system of Blast Furnace Blower System provided by the invention, its structure is: this wind turning system has a plurality of, and each wind turning system is equipped with and blast furnace blow matching used gas blower and phonomoter; Be serially connected with the vacuum breaker that is arranged in order on the outlet conduit of every gas blower, be sourdine, under meter and the air-supply electric butterfly valve of blower fan air-supply; The air-supply electric butterfly valve connects the cold-air duct of each blast furnace through lateral; 1 connection electric butterfly valve is installed on the every lateral, constitutes the wind turning passage thus.
Said wind turning system has 3, is used for the system of 4 blast furnace blowing engines to 3 blast furnace air feeds.
Described 3 wind turning system, they are communicated with 3 cold blast pipelines in twos.
In the place that described lateral links to each other with cold-air duct, the bend pipe pressure balance loop expansion pipe can be installed.
Described bend pipe pressure balance loop expansion pipe adopts U type project organization, is equipped with in the bend of U type structure to be attached thereto 2 logical wind turnings and to cut off butterfly valves and 1 wind turning variable valve, and the wind turning variable valve cuts off between the butterfly valve 2 wind turnings.
The normally open that butterfly valve keeps certain valve position is cut off in described wind turning, and flow can be not excessive during with the restriction wind turning, in order to avoid the blast 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.
Circuit and gas circuit d.a. control are adopted in the control design of described wind turning variable valve, and the SV of this valve is in uncharged state at ordinary times, and SV is 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; The valve cylinder inflation; Valve reaches full-gear in 10s, if under emergency case, run into unexpected dead electricity this moment, when losing gas, 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.
The present invention compared with prior art has following main beneficial effect:
1. under the limiting case,, can guarantee that an air dispensation system that is far more than can carry out the wind turning action simultaneously to two blast furnaces, farthest guarantees the blast furnace production safety if the air-blast system of two blast furnaces is out of order simultaneously;
2. 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;
3. 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 air dispensation 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.
4. 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 has realized the operation of 1 pair of n air dispensation system, has farthest guaranteed advantages such as 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.
Fig. 4 is the synoptic diagram of the present invention according to the layout of parallel cold air duct direction.
Fig. 5 is the synoptic diagram of the present invention according to the layout of vertical cold air duct direction.
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 system of Blast Furnace Blower System provided by the invention, its structure is as shown in Figure 1: air dispensation 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.
Present embodiment adopts 3 wind turning system, 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.
The wind turning system of Blast Furnace Blower System provided by the invention, it is used for different Blast Furnace Blower System are carried out wind turning control.
When the present invention carried out wind turning control to different Blast Furnace Blower System, concrete steps comprised:
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. 3 to Fig. 5, 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.
The effect of above-mentioned first signal, second signal and the 3rd signal is ditto chatted.
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.
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 (7)
1. the wind turning system of a Blast Furnace Blower System, it is a plurality of to it is characterized in that this wind turning system has, and each wind turning system is equipped with and blast furnace blow matching used gas blower (1) and phonomoter (2); Be serially connected with the vacuum breaker (3), sourdine (4), under meter (5) and the air-supply electric butterfly valve (6) that are arranged in order on the outlet conduit of every gas blower (1) for the blower fan air-supply; Air-supply electric butterfly valve (6) connects the cold-air duct of each blast furnace through lateral; 1 connection electric butterfly valve (7) is installed on the every lateral, constitutes the wind turning passage thus.
2. the wind turning system of Blast Furnace Blower System according to claim 1 is characterized in that this wind turning system has 3, is used for the system of 4 blast furnace blowing engines to 3 blast furnace air feeds.
3. the wind turning system of Blast Furnace Blower System according to claim 2 is characterized in that described 3 wind turning system, and they are communicated with 3 cold blast pipelines in twos.
4. the wind turning system of Blast Furnace Blower System according to claim 1 is characterized in that the place that lateral links to each other with cold-air duct is equipped with bend pipe pressure balance loop expansion pipe (13).
5. the wind turning system of Blast Furnace Blower System according to claim 4; It is characterized in that bend pipe pressure balance loop expansion pipe (13) adopts U type project organization; Be equipped with in the bend of U type structure and be attached thereto 2 logical wind turnings and cut off butterfly valve (8) and 1 wind turning variable valve (9), wind turning variable valve (9) is positioned between 2 wind turnings cut-out butterfly valves (8).
6. the wind turning system of Blast Furnace Blower System according to claim 5; It is characterized in that wind turning cut-out butterfly valve (8) keeps the normally open of certain valve position; Flow can be not excessive during with the restriction wind turning; In order to avoid the blast 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.
7. the wind turning system of Blast Furnace Blower System according to claim 6; Circuit and gas circuit d.a. control are adopted in the control design that it is characterized in that wind turning variable valve (9); The SV of this valve is in uncharged state at ordinary times, and SV is 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; The valve cylinder inflation; Valve reaches full-gear in 10s, if under emergency case, run into unexpected dead electricity this moment, when losing gas, lean on the pressurized air that is full of in the cylinder can make valve guarantee aperture at that time.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011103216216A CN102337368A (en) | 2011-10-21 | 2011-10-21 | Air dispensation control systems for air blowing systems of blast furnaces |
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| CN2011103216216A CN102337368A (en) | 2011-10-21 | 2011-10-21 | Air dispensation control systems for air blowing systems of blast furnaces |
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Patent Citations (9)
| 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 |
| CN1896895A (en) * | 2005-07-12 | 2007-01-17 | 马鞍山伏斯特科技发展有限公司 | Automatic controller of blast-furnace tuyere pour slag |
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| 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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Application publication date: 20120201 |