CN102220444B - Anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace - Google Patents
Anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace Download PDFInfo
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- CN102220444B CN102220444B CN 201110191075 CN201110191075A CN102220444B CN 102220444 B CN102220444 B CN 102220444B CN 201110191075 CN201110191075 CN 201110191075 CN 201110191075 A CN201110191075 A CN 201110191075A CN 102220444 B CN102220444 B CN 102220444B
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Abstract
The invention discloses an anti-blocking control system for coal spray branch pipes of a distributor of a coal spray system of a blast furnace, which comprises a distributor, a plurality of coal spray branch pipes and a controller, wherein the distributor is used for distributing pulverized coal from a main coal spray pipe to the plurality of coal spray branch pipes; and the plurality of coal spray branch pipes are used for sweeping through a circulating sweeping way in a circulating sweeping cycle under the control of the controller. According to the control system adopting the circulating sweeping for the coal spray branch pipes of the coal spray distributor of the blast furnace, the blocking rate of the coal spray branch pipes can be greatly reduced, the uniformity of coal spray quantity from a wind gap of the blast furnace is stabilized, the working intensity of operation staff during the production process is reduced, the level of automation is improved, the safety of production is powerfully ensured and conditions are created for stability and smooth operation of the blast furnace.
Description
Technical field
The present invention relates to the control techniques field, particularly a kind of anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace.
Background technology
Furnace coal spraying technology is the key link of blast furnace system composition optimizes, having the decrease coke ratio, increase economic efficiency, alleviate the advantage such as environmental pollution. the coal powder injection technology as the megatrend of blast furnace technology development both at home and abroad, is one of three large important technology routes of China's steel industry development.Along with the coal powder injection technology to large injection rate concentrated phase developer conveying direction. stable, uniformly coal powder blowing amount be keep furnace temperature stable, guarantee furnace condition anterograde, make blast furnace reach the important foundation of best smelting state.
The mobility of coal jetting branch coal dust easily is subjected to very large impact the such as fluctuation, divider of coal dust ature of coal, humidity, granularity, conditions of blast furnace, therefore cause the obstruction of coal jetting branch, cause the disconnected coal in the one or more air ports of blast furnace, make pulverized coal injection inhomogeneous, unstable, not only can affect blast-furnace roasting distributes, thereby and can burn the normal production that spray gun affects blast furnace, even destroy the working of a furnace and cause damping down.All not good to the injection amount effect at present.Current, China's pulverized coal injection automatic control technology level is comparatively weak, this body structure of Dual-Phrase Distribution of Gas olid object very complex, the domestic effective detection means that lacks coal jetting branch pulverized coal flow and obstruction, and the measuring instrument of external pulverized coal flow and obstruction is expensive and effect is general, and domestic application is few.Therefore, how to adopt a kind of Controlling System to prevent the obstruction of bf coal injection system winding-up arm, guarantee the stable of pulverized coal injection and evenly just seem particularly important.
At present, domestic is to adopt temperature differential method or survey stifled instrument to judge whether arm stops up to the anti-blocking Controlling System of coal jetting branch, if stop up close the coal injection cutting valve of coal jetting branch, opening the purging trip valve purges coal jetting branch, until unimpeded, then the shut-down purge trip valve, open the coal injection cutting valve and continue coal powder injection.For this control mode, only have when blockage is propped up in judgement just to purge, can't prevent in advance the obstruction of coal jetting branch, and the purging of arm is not had rule yet, easily cause the blast-furnace tuyere coal powder injection inhomogeneous, asymmetric, thereby affect the normal production of blast furnace, even destroy the working of a furnace.
Summary of the invention
One of purpose of the present invention is to provide a kind of anti-blocking Controlling System of coal jetting branch that reduces the coal jetting branch plugging rate.
According to an aspect of the present invention, provide a kind of anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace to comprise: divider, a plurality of coal jetting branch, controller; Described divider will be distributed to described a plurality of coal jetting branch from coal powder injection supervisor's coal dust; Described a plurality of coal jetting branch is under described controller is controlled, and in cycle purge in the cycle, the mode by cycle purge purges.
Further, described Controlling System also comprises: module is set, sets the purge time of cycle purge cycle and each coal jetting branch.
Further, described controller comprises: judge module, in the cycle, branched coal jetting branch is purged successively control in cycle purge, and in purging, judge that whether coal jetting branch is at automatic coal powder injection state;
Control module, is controlled this coal jetting branch and is purged, this coal jetting branch coal powder injection of control after purging finishes at automatic coal powder injection state when described judge module judgement coal jetting branch.
Further, described control module comprises: the first control unit, and control the coal injection cutting valve of this coal jetting branch and close, purge trip valve and open, purge; The second control unit after purge time finishes, is automatically controlled the purging trip valve of this coal jetting branch and is closed, and the coal injection cutting valve is opened, and transfers the coal powder injection state to.
Further, described the first control unit comprises: first controls subelement, the first judgment sub-unit and warning subelement; Described first controls subelement controls the coal injection cutting valve of this coal jetting branch and closes, and judges that in described the first judgment sub-unit the coal injection cutting valve of this coal jetting branch cuts out when putting in place, controls the purging trip valve of this coal jetting branch and opens; The warning subelement judges in the first judgment sub-unit that the coal injection cutting valve of this coal jetting branch cuts out and carries out fault alarm when not in place.
Further, described the second control unit comprises: second controls subelement, the second judgment sub-unit and warning subelement; Described the second judgment sub-unit judges whether the purge time of this coal jetting branch finishes, judges that the purging trip valve of this coal jetting branch cuts out whether to put in place and judge that this coal jetting branch coal injection cutting valve is opened whether puts in place; Described second controls subelement when described the second judgment sub-unit judges that the purge time of this coal jetting branch has finished, controls this coal jetting branch and enters the coal powder injection state, automatically controls the purging trip valve of coal jetting branch and closes; Judge that in described the second judgment sub-unit the purging trip valve of this coal jetting branch cuts out when putting in place, control the coal injection cutting valve of this coal jetting branch and open; Judge that in described the second judgment sub-unit this coal jetting branch coal injection cutting valve opens when putting in place, control this coal jetting branch coal powder injection; Described warning subelement judges that in described the second judgment sub-unit the purging trip valve of this coal jetting branch cuts out when not putting in place, carries out fault alarm; Judge that in described the second judgment sub-unit this coal jetting branch coal injection cutting valve do not open when putting in place, carry out fault alarm.
Further, also when described a plurality of coal jetting branch were begun to carry out cycle purge, whether the time of carrying out the cycle of cycle purge began to judge described judge module.
Further, described Controlling System also comprises: instrument is blocked up in a plurality of surveys, and the stifled instrument of each described survey is arranged in each coal jetting branch.
Further, each described coal jetting branch is provided with coal jetting branch coal injection cutting valve and coal jetting branch purging trip valve.
Further, described Controlling System also comprises: coal powder injection main pipe coal injection cutting valve and coal powder injection main pipe purge trip valve; Described coal powder injection main pipe coal injection cutting valve and coal powder injection main pipe purge trip valve and are arranged at described coal powder injection main pipe.
Further, the number of described coal jetting branch is 16-40.
According to the Controlling System that pulverized coal injection divider coal jetting branch is adopted cycle purge provided by the invention, can greatly reduce the plugging rate of coal jetting branch, stablize the homogeneity of blast-furnace tuyere injecting coal quantity, reduce the working strength of operator in production process, improve automatization level, powerful guarantee the safety of producing, for the blast furnace stable smooth operation creates conditions.
Description of drawings
Fig. 1 is the structured flowchart of the anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace that provides of the embodiment of the present invention;
Fig. 2 is the structured flowchart of controller shown in Figure 1;
Fig. 3 is the structured flowchart of the first control unit shown in Figure 2;
Fig. 4 is the structured flowchart of the second control unit shown in Figure 2;
Fig. 5 is the structural representation of the pulverized coal injection dispenser system that provides of the embodiment of the present invention;
Fig. 6 is the schematic flow sheet of the anti-blocking control of coal jetting branch carried out of the pulverized coal injection dispenser system based on shown in Figure 5 that the embodiment of the present invention provides;
Fig. 7 is that the control flow schematic diagram when reporting to the police is stopped up in the appearance that provides of the embodiment of the present invention.
The object of the invention, function and advantage are described further with reference to accompanying drawing in connection with embodiment.
Embodiment
As shown in Figure 1, a kind of anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace of providing of the embodiment of the present invention comprises divider 1, a plurality of coal jetting branch 2, controller 3, the stifled instrument of module 4, alarm module and a plurality of survey is set.Divider 1 will be distributed to a plurality of coal jetting branch 2 from coal powder injection supervisor's coal dust.A plurality of coal jetting branch 2 are under controller 3 is controlled, and in cycle purge in the cycle, the mode by cycle purge purges.Wherein, the number of coal jetting branch 2 is 16-40, can arrange according to actual needs.Module 4 is set sets the purge time of cycle purge cycle and each coal jetting branch.For example, setting the number in cycle purge cycle is 20 times.The purge time of each coal jetting branch is 10-60 second.Each is surveyed stifled instrument and is arranged in each coal jetting branch.Alarm module is reported to the police when each described coal jetting branch occurs to stop up.Each coal jetting branch is provided with coal jetting branch coal injection cutting valve and coal jetting branch purges trip valve.Be provided with coal powder injection main pipe coal injection cutting valve and coal powder injection main pipe purging trip valve at coal powder injection main pipe.
Referring to Fig. 2, controller 3 comprises judge module 30 and control module 31.Wherein, judge module 30 judges that successively whether coal jetting branch is at automatic coal powder injection state in a loop cycle.For example, the number of setting the cycle purge cycle is 20 times, and in each purge cycles, judge module 30 need to judge successively that whether coal jetting branch is at automatic coal powder injection state so.Control module 31, is controlled this coal jetting branch and is purged by purge time at automatic coal powder injection state at judge module 30 judgement coal jetting branch, purges to finish rear this coal jetting branch coal powder injection of controlling.Control module 31 comprises the first control unit 311 and the second control unit 312.Wherein, the first control unit 311 is during at coal powder injection state automatically at judge module 30 judgement coal jetting branch, controls the coal injection cutting valve of this coal jetting branch and closes, and purges trip valve and opens, and purges.The second control unit 312 is automatically controlled the purging trip valve of this coal jetting branch and is closed after purge time finishes, and the coal injection cutting valve is opened, and transfers the coal powder injection state to.Judge module 30 also is used for when described a plurality of coal jetting branch are begun to carry out cycle purge, and whether the time of carrying out the cycle of cycle purge begins to judge.
Referring to Fig. 3, the first control unit 311 comprises that first controls subelement 3111, the first judgment sub-unit 3112 and warning subelement 3113.First controls the coal injection cutting valve that subelement 3111 controls these coal jetting branch closes, and closes when putting in place at the coal injection cutting valve of first judgment sub-unit 3112 these coal jetting branch of judgement, controls the purging trip valve of this coal jetting branch and opens.Warning subelement 3113 is closed at the coal injection cutting valve of first these coal jetting branch of judgment sub-unit 3112 judgement and is carried out fault alarm when not in place.
Referring to Fig. 4, the second control unit 312 comprises that second controls subelement 3121, the second judgment sub-unit 3122 and warning subelement 3123.The second judgment sub-unit 3122 judges whether the purge time of this coal jetting branch finishes, judges that the purging trip valve of this coal jetting branch cuts out whether to put in place and judge that this coal jetting branch coal injection cutting valve is opened whether puts in place.
Below in conjunction with a specific embodiment, system shown in Figure 1 is described in detail.
Participate in Fig. 5, the pulverized coal injection dispenser system comprises that divider, 1 coal powder injection main pipe coal injection cutting valve VA0,1 coal powder injection main pipe purge trip valve VB0,20 coal jetting branch, 20 coal jetting branch coal injection cutting valve VA1 ~ VA20,20 coal jetting branch and purge trip valve VB1 ~ VB20,20 and survey stifled instrument and controller (not shown).20 spray guns have been distributed to uniformly at divider place coal dust.Have the situation that coal jetting branch stops up in the winding-up process, if do not make fast coal jetting branch unimpeded, not only can affect blast-furnace roasting distributes, and can burn spray gun, at this moment just detect its stopping state by the coal jetting branch blockage detector, then the valve by the corresponding coal jetting branch of controller control purges.Every coal jetting branch has a blowing valve, and a purging trip valve purges trip valve and cuts out during normal coal powder injection, and the coal injection cutting valve is opened.During purging, the coal injection cutting valve cuts out, and purges trip valve and opens.When purging state and coal powder injection state switch, first shut-down purge trip valve, the purging trip valve is opened the coal injection cutting valve after closing and putting in place again.When coal powder injection state and purging state switch, first close the coal injection cutting valve, the coal injection cutting valve is opened the purging trip valve after closing and putting in place again.
Fig. 6 is based on the flow process of the anti-blocking control of coal jetting branch that pulverized coal injection dispenser system shown in Figure 5 carries out, and at first carries out the initialize setting, by the purge time that module 4 is set determines cycle purge cycles and each coal jetting branch.After starting cycle purge, when a plurality of coal jetting branch were begun to carry out cycle purge, whether the time of carrying out the cycle of cycle purge began to judge by judge module 30.If the time in the cycle of cycle purge, system begins successively 20 coal jetting branch to be purged from the 1# coal jetting branch.Judge by judge module 30 whether the 1# coal jetting branch drops into automatic coal powder injection state, dropped into automatic coal powder injection state if judge the 1# coal jetting branch, closed by the first coal injection cutting valve of controlling subelement 3111 control 1# coal jetting branch, and the coal injection cutting valve of the first judgment sub-unit 3112 judgement 1# coal jetting branch close put in place after, control the purging trip valve and open, transfer the purging state to.Second controls subelement 3121 when the purge time of the second judgment sub-unit 3122 judgement 1# coal jetting branch has finished, controls the 1# coal jetting branch and enters the coal powder injection state, automatically controls the purging trip valve of coal jetting branch and closes; Close when putting in place at the purging trip valve of the second judgment sub-unit 3122 judgement 1# coal jetting branch, second controls the coal injection cutting valve that subelement 3121 controls the 1# coal jetting branch opens; Open when putting in place at the second judgment sub-unit 3122 judgement 1# coal jetting branch coal injection cutting valves, second controls subelement 3121 controls the coal powder injections of 1# coal jetting branch, enters the coal powder injection state.After judge module 30 confirms that the purging trip valve cuts out, the purging program that enters the 2# coal jetting branch.If the 1# coal jetting branch is not at auto state, the 1# coal jetting branch maintains the original state constant, directly skip the purging program that 1# coal powder injection straight tube enters the 2# coal jetting branch, if the failsafe valve of 1# coal jetting branch report to the police and skip simultaneously this arm directly enters the purging program of 2# coal jetting branch.In like manner, 2# ~ 20# coal jetting branch all purges successively by such scheme, after the 20th coal jetting branch purges end, one of whole divider coal jetting branch purges loop ends, is in waiting status this moment, after cycle purge end cycle time of setting, enter the cycle purge of next round, again begin judgement from the l# coal jetting branch and purge, reciprocal successively, go round and begin again.
Be illustrated in figure 4 as the control flow when occur to stop up reporting to the police, when having coal jetting branch to stop up in the cycle purge process to report to the police, immediate precedence purges this coal jetting branch until stops up to report to the police and disappear, and the purging of other coal jetting branch is sequentially constant.Take the 1# coal jetting branch as example, if the 1# coal jetting branch has dropped into auto state and at the coal powder injection state, when having the 1# coal jetting branch to occur stopping up warning, control the coal injection cutting valve of corresponding coal jetting branch and close, purge trip valve and open, transfer immediately the purging state to, after stopping up the end of reporting to the police, control the purging trip valve of corresponding coal jetting branch and close, the coal injection cutting valve is opened, and transfers the coal powder injection state to.In like manner, 2# ~ 20# pci extension pipe plug stops up to report to the police and all processes by such scheme.
According to the Controlling System that pulverized coal injection divider coal jetting branch is adopted cycle purge provided by the invention, can greatly reduce the plugging rate of coal jetting branch, stablize the homogeneity of blast-furnace tuyere injecting coal quantity, reduce the working strength of operator in production process, improve automatization level, powerful guarantee the safety of producing, for the blast furnace stable smooth operation creates conditions.
Above-described embodiment is the better embodiment of the present invention; but embodiments of the present invention are not restricted to the described embodiments; other any do not deviate from change, the modification done under spirit of the present invention and principle, substitutes, combination, simplify; all should be the substitute mode of equivalence, within being included in protection scope of the present invention.
Claims (7)
1. an anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace, is characterized in that, comprising:
Divider, a plurality of coal jetting branch, controller and module is set; Described divider will be distributed to described a plurality of coal jetting branch from coal powder injection supervisor's coal dust; Described a plurality of coal jetting branch is under described controller is controlled, and in cycle purge in the cycle, the mode by cycle purge purges; The described module that arranges, the purge time of setting cycle purge cycle and each coal jetting branch; Described controller comprises judge module, control module; Described judge module judges that successively whether coal jetting branch is at automatic coal powder injection state in a loop cycle; Described control module, is controlled this coal jetting branch and is purged by described purge time at automatic coal powder injection state when described judge module judgement coal jetting branch, controls this coal jetting branch coal powder injection after purging finishes; Described control module comprises the first control unit and the second control unit; Described the first control unit is during at coal powder injection state automatically at described judge module judgement coal jetting branch, controls the coal injection cutting valve of this coal jetting branch and closes, and purges trip valve and opens, and purges; Described the second control unit after purge time finishes, is automatically controlled the purging trip valve of this coal jetting branch and is closed, and the coal injection cutting valve is opened, and transfers the coal powder injection state to.
2. Controlling System according to claim 1, is characterized in that, described the first control unit comprises:
First controls subelement, the first judgment sub-unit and warning subelement;
Described first controls subelement controls the coal injection cutting valve of this coal jetting branch and closes, and judges that in described the first judgment sub-unit the coal injection cutting valve of this coal jetting branch cuts out when putting in place, controls the purging trip valve of this coal jetting branch and opens;
The warning subelement judges in described the first judgment sub-unit that the coal injection cutting valve of this coal jetting branch cuts out and carries out fault alarm when not in place.
3. Controlling System according to claim 2, is characterized in that, described the second control unit comprises:
Second controls subelement, the second judgment sub-unit and warning subelement;
Described the second judgment sub-unit judges whether the purge time of this coal jetting branch finishes, judges that the purging trip valve of this coal jetting branch cuts out whether to put in place and judge that this coal jetting branch coal injection cutting valve is opened whether puts in place;
Described second controls subelement when described the second judgment sub-unit judges that the purge time of this coal jetting branch has finished, controls this coal jetting branch and enters the coal powder injection state, automatically controls the purging trip valve of coal jetting branch and closes; Judge that in described the second judgment sub-unit the purging trip valve of this coal jetting branch cuts out when putting in place, control the coal injection cutting valve of this coal jetting branch and open; Judge that in described the second judgment sub-unit this coal jetting branch coal injection cutting valve opens when putting in place, control this coal jetting branch coal powder injection;
Described warning subelement judges that in described the second judgment sub-unit the purging trip valve of this coal jetting branch cuts out when not putting in place, carries out fault alarm; Judge that in described the second judgment sub-unit this coal jetting branch coal injection cutting valve do not open when putting in place, carry out fault alarm.
4. according to claim 2 or 3 described Controlling System of any one is characterized in that:
Also when described a plurality of coal jetting branch were begun to carry out cycle purge, whether the time of carrying out the cycle of cycle purge began to judge described judge module.
5. Controlling System according to claim 1, is characterized in that, also comprises:
Instrument is blocked up in a plurality of surveys, and the stifled instrument of each described survey is arranged in each coal jetting branch;
Alarm module is reported to the police when each described coal jetting branch occurs to stop up.
6. Controlling System according to claim 5 is characterized in that:
Each described coal jetting branch is provided with the coal injection cutting valve and purges trip valve; The number of described coal jetting branch is 16-40.
7. Controlling System according to claim 6, is characterized in that, also comprises:
Coal powder injection main pipe coal injection cutting valve and coal powder injection main pipe purge trip valve; Described coal powder injection main pipe coal injection cutting valve and coal powder injection main pipe purge trip valve and are arranged at described coal powder injection main pipe.
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201110191075 CN102220444B (en) | 2011-07-08 | 2011-07-08 | Anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace |
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| CN 201110191075 CN102220444B (en) | 2011-07-08 | 2011-07-08 | Anti-blocking control system for coal spray branch pipes of distributor of coal spray system of blast furnace |
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| CN102220444B true CN102220444B (en) | 2013-06-12 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| TWI643956B (en) * | 2016-12-15 | 2018-12-11 | 日商創意特科股份有限公司 | Fuel supply system |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103578114B (en) * | 2013-11-25 | 2016-06-01 | 中冶南方工程技术有限公司 | Coal jetting branch based on image procossing surveys stifled anti-blocking method |
| JP6870633B2 (en) * | 2018-03-07 | 2021-05-12 | Ｊｆｅスチール株式会社 | How to blow pulverized coal into a blast furnace |
| CN114790500A (en) * | 2022-04-08 | 2022-07-26 | 青岛恒拓环保科技有限公司 | Blast furnace coal injection anti-blocking intelligent back-blowing device and method |
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| CN2519229Y (en) * | 2002-01-25 | 2002-10-30 | 东北大学 | Automatic displaying alarm device |
| CN1624158A (en) * | 2003-12-04 | 2005-06-08 | 首钢总公司 | In-line moniting controlling system of blast furnace coal powder injection |
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