CN102344978A - System for realizing control of mutual air dispensation in operation process of air supply systems of different blast furnaces - Google Patents
System for realizing control of mutual air dispensation in operation process of air supply systems of different blast furnaces Download PDFInfo
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- CN102344978A CN102344978A CN2011103216057A CN201110321605A CN102344978A CN 102344978 A CN102344978 A CN 102344978A CN 2011103216057 A CN2011103216057 A CN 2011103216057A CN 201110321605 A CN201110321605 A CN 201110321605A CN 102344978 A CN102344978 A CN 102344978A
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Abstract
The invention can effectively realize control of mutual air dispensation when air supply systems of different blast furnaces operate under the following conditions that (1) besides a normal blowing passage, all the blast furnaces are additionally provided with air dispensation passages for emergency so as to ensure the air quantity for maintaining the limiting production; (2) one of two emergency air dispensation passages in air dispensation control systems, which has the most suitable air pressure, is ensured to carry out air dispensation operation; (3) one air dispensation control system is ensured to carry out air dispensation operation on two blast furnaces so as to avoid the limiting case that blowing systems of the two blast furnaces simultaneously have faults under the limiting case; (4) when any one fan in the air dispensation control systems is overhauled, at least one fan is ensured to provide the air dispensation service; and (5) two air dispensation cutoff butterfly valves in the front and at the rear of of an air dispensation regulating valve of each air dispensation control system are in a state of the opening degree of 30 percent to limit the flow rate so as to avoid the influence of major fluctuation of the air quantity when the air dispensation regulating valves are rapidly opened or fully opened in the air dispensation process on the production of other blast furnaces.
Description
Technical field
The present invention relates to the system field, the system of mutual wind turning when particularly relating to a kind of system job of realizing different blast furnace air feeds.
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 system of mutual wind turning when a kind of system job of realizing different blast furnace air feeds is provided; The control of mutual wind turning when this 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 system of mutual wind turning during the system job of the different blast furnace air feeds of realization provided by the invention, the control of mutual wind turning when it realizes the system job of different blast furnace air feeds under following situation:
(1) arbitrary blast furnace be except that normal blast channel, all is used to the wind turning passage of meeting an urgent need in addition in addition, guarantees to keep the air quantity that its limit is produced;
(2) guarantee in the wind turning system that only one of blast carries out the wind turning action in two emergent wind turning passages;
(3) 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;
(4) guarantee that any typhoon machine also has a typhoon machine that the wind turning service is provided at least in the wind turning system when maintenance;
(5) all there are two wind turnings to cut off butterfly valves in before and after the wind turning variable valve of each wind turning system and are in aperture 30% limited flow, be used for avoiding when wind turning wind turning variable valve to open soon or the too big and influence that the production of other blast furnaces self is caused of air quantity fluctuation during standard-sized sheet.
Described wind turning passage, its structure is: be provided 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.
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.
Adopt U type project organization at described bend pipe pressure balance loop expansion pipe, be equipped with in the bend of U type structure and be attached thereto 2 logical wind turnings and cut off butterfly valves and 1 wind turning variable valve, 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 produced the movie star, 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.
Above-mentioned system provided by the invention can be used for the system of 4 blast furnace blowing engines to 3 blast furnace air feeds.
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. one that can guarantee in the system blast optimum (working of a furnace is best) in two emergent wind turning passages is carried out the wind turning action, makes the wind turning passage have washability, realizes the effect of the using and the reserved;
3. can guarantee that an air dispensation system can carry out the wind turning action simultaneously to two blast furnaces, avoid the out of order limiting case of air-blast system while of two blast furnaces under limiting case, improve the SF that blast furnace system is produced;
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 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.
6. 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 can effectively guarantee 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 the 1# blast furnace blower break down (2#3# blast furnace blower works better) be the schema of example.
Fig. 4 be with 1# and 2# blast furnace blower break down simultaneously (3# blast furnace blower works better) be the schema of example.
Fig. 5 is the synoptic diagram of the present invention according to the layout of parallel cold air duct direction.
Fig. 6 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:
(1) to first kind of situation, if promptly the blower fan of 1 blast furnace breaks down, the vacuum breaker 3 of this blower fan outlet this moment closes; Provide a signal and give the wind turning system; Then other 2 wind turning system begin to judge, select blast big to its wind turning, concrete steps are following:
Referring to Fig. 3 and Fig. 5, 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, gets to manual state and is 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.
(2) to second kind of situation, if promptly 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 and Fig. 6, 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 system of mutual wind turning when realizing the system job of different blast furnace air feeds, the control of mutual wind turning when it is characterized in that under following situation, realizing the system job of different blast furnace air feeds:
(1) arbitrary blast furnace be except that normal blast channel, all is used to the wind turning passage of meeting an urgent need in addition in addition, guarantees to keep the air quantity that its limit is produced;
(2) guarantee in the wind turning system that only one of blast carries out the wind turning action in two emergent wind turning passages;
(3) 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;
(4) guarantee that any typhoon machine also has a typhoon machine that the wind turning service is provided at least in the wind turning system when maintenance;
(5) all there are two wind turnings to cut off butterfly valves in before and after the wind turning variable valve of each wind turning system and are in aperture 30% limited flow, be used for avoiding when wind turning wind turning variable valve to open soon or the too big and influence that the production of other blast furnaces self is caused of air quantity fluctuation during standard-sized sheet.
2. according to the above system of claim 1, it is characterized in that described wind turning passage, it is provided 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.
3. system according to claim 2 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).
4. the wind turning system of Blast Furnace Blower System according to claim 3; 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).
5. the wind turning system of Blast Furnace Blower System according to claim 4; 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.
6. system according to claim 5; 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; 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.
7. system according to claim 1 is characterized in that this system is used for the system of 4 blast furnace blowing engines to 3 blast furnace air feeds.
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| CN2011103216057A CN102344978A (en) | 2011-10-21 | 2011-10-21 | System for realizing control of mutual air dispensation in operation process of air supply systems of different blast furnaces |
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| CN2011103216057A CN102344978A (en) | 2011-10-21 | 2011-10-21 | System for realizing control of mutual air dispensation in operation process of air supply systems of different blast furnaces |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104561423A (en) * | 2014-12-19 | 2015-04-29 | 鞍钢集团信息产业有限公司 | Redundant air adjusting system |
| CN105420435A (en) * | 2015-12-18 | 2016-03-23 | 成都成发科能动力工程有限公司 | Automatic blast furnace air adjusting system and air adjusting method for metallurgic industry |
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| CN105420435A (en) * | 2015-12-18 | 2016-03-23 | 成都成发科能动力工程有限公司 | Automatic blast furnace air adjusting system and air adjusting method for metallurgic industry |
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Application publication date: 20120208 |