CN102787191B - System and process for pulverized coal injection of blast furnace - Google Patents
System and process for pulverized coal injection of blast furnace Download PDFInfo
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- CN102787191B CN102787191B CN201210298464.6A CN201210298464A CN102787191B CN 102787191 B CN102787191 B CN 102787191B CN 201210298464 A CN201210298464 A CN 201210298464A CN 102787191 B CN102787191 B CN 102787191B
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Abstract
The invention provides a system and a process for pulverized coal injection of a blast furnace. The system comprises a plurality of parallel injection tanks, fluidization tanks, injection branch pipes, coal injection valves, an injection main pipe, a charging pipeline, a charging valve, a pressure stabilizing pipeline, a pressure stabilizing valve, a gas supplementing pipeline, a gas supplementing regulating valve, a pulverized coal flow regulating valve and a pulverized coal flow meter, wherein one fluidization tank is arranged at the bottom of each injection tank, one injection branch pipe is connected with an outlet of each injection tank, one coal injection valve is arranged on each injection branch pipe, the charging pipeline and the pressure stabilizing pipeline are connected with each injection tank, the injection main pipe is vertically arranged, the pulverized coal flow regulating valve and the pulverized coal flow meter are arranged on the injection main pipe from bottom to top, the gas supplementing pipeline is connected to the bottom end of the injection main pipe, and the gas supplementing regulating valve is arranged on the injection main pipe and below the joints of the injection branch pipes and the injection main pipe. By the aid of the system and the process, pulverized coal can be uniformly and stably injected, injection quantity is accurately controlled, pulverized coal dense phase transportation technology can be realized, gas consumption is low, and pipeline abrasion is less.
Description
Technical field
The invention belongs to metallurgical technology field, relate in particular to a kind of Pulverized Coal Injection System with Fuzzy and technique.
Background technology
In the process of pulverized coal injection in blast furnace, it is to improve one of coal injection system reliability, assurance blast furnace burden direct motion essential condition that uniform and stable winding-up and winding-up amount are accurately controlled, and its core is uniform and stable property, adjustability, the economy of the process of jetting.Uniform and stable property is: winding-up process is continuous, and the fluctuation of winding-up amount is little; Adjustability is: according to blast furnace operating needs, regulation blowing amount, meets the requirement of blast furnace hearth thermal system to coal dust amount in time; Economy is: under the prerequisite of safe and reliable production, reducing production costs, is mainly to reduce delivering gas flow.
At present, existing and pot type coal injection system mainly comprises two or more winding-up tanks of arranging side by side, exports the winding-up arm being connected and the winding-up house steward who is connected with the outlet of multiple winding-up arms with each injection tube.This winding-up house steward is for being horizontally disposed with.On this winding-up house steward, be provided with air compensation device, this air compensation device is arranged on multiple winding-up arms and converges winding-up house steward place afterwards.This air compensation device is connected with the vertically disposed tonifying Qi variable valve with this winding-up house steward, but this design exists following problem:
One, because the design of air compensation device self structure makes can produce local dip at coal powder injection pipeline admission place, the local easily wearing and tearing of air compensation device and pipeline, some coal powder injection apparatus of blast furnace is in order to extend working time, between each winding-up tank and winding-up house steward, on pipeline, an air compensation device is being installed, but can increase so again cost, and make complex system;
Two, air compensation device is arranged on the winding-up house steward place of level, because the coal dust in concentrated phase transfer line can form " density stream " at pipeline lower section under action of gravity, make-up gas is unbalanced with contacting of coal dust, easily forms larger pulsation, makes the fluctuation of winding-up amount larger;
Three, converge winding-up house steward place afterwards because air compensation device is arranged on multiple winding-up arms, the probability that easily causes winding-up arm and winding-up house steward junction to block up powder increases.
Meanwhile, existing and pot type coal injection system also have winding-up amount can not fine adjustment, the easily problem such as obstruction of inhomogeneous, the injection tube appearance of a street of jetting.
Summary of the invention
The technical problem to be solved in the present invention is: a kind of Pulverized Coal Injection System with Fuzzy and technique that can uniform and stable winding-up be provided.
The present invention for solving the problems of the technologies described above taked technical scheme is:
A kind of Pulverized Coal Injection System with Fuzzy, it comprises multiple winding-up tanks of arranging side by side, be arranged on the streaming tank of each winding-up pot bottom, export with each winding-up tank the winding-up arm being connected, be arranged on the coal powder injection valve on each winding-up arm, the winding-up house steward who is connected with the outlet of multiple described winding-up arms, the pressurising pipeline being connected with each winding-up tank, be arranged on the equalizer valve on described pressurising pipeline, the voltage stabilizing pipeline being connected with each winding-up tank, be arranged on the pressure maintaining valve on described voltage stabilizing pipeline, tonifying Qi pipeline, tonifying Qi variable valve, pulverized coal flow variable valve, and coal power flowmeter, it is characterized in that, described winding-up house steward vertically arranges, described pulverized coal flow variable valve and coal power flowmeter are arranged on described winding-up house steward from bottom to top, described tonifying Qi pipeline is connected in described winding-up house steward's bottom, described tonifying Qi variable valve is arranged on winding-up house steward, described tonifying Qi variable valve is arranged on the below of multiple described winding-up arms and described winding-up house steward junction, and described pulverized coal flow variable valve and coal power flowmeter are arranged on the top of multiple described winding-up arms and described winding-up house steward junction.
In such scheme, described Pulverized Coal Injection System with Fuzzy also comprises bottom pressurising branch road and is arranged on the lower equalizer valve on described bottom pressurising branch road, the inlet end of described bottom pressurising branch road is connected with described pressurising pipeline, and the outlet side of described bottom pressurising branch road is connected with the tapering of described winding-up tank.
In such scheme, described Pulverized Coal Injection System with Fuzzy also comprises the tapering fluidisation pipeline, the bottom fluidization pipeline being connected with each winding-up tank that are connected with each winding-up tank, be arranged on the tapering fluidisation variable valve of described tapering fluidisation pipeline and be arranged on the bottom fluidization variable valve of described bottom fluidization pipeline, and described tapering fluidisation pipeline, bottom fluidization pipeline and voltage stabilizing pipeline are connected in same supply air line.
A kind of blast-furnace coal powder injection technique, is characterized in that, it comprises the following steps:
1) one of them the winding-up tank in multiple winding-up tanks of arranging is side by side filled to powder, all the other winding-up tanks do homework, until meet after winding-up condition in dormant state;
2) after dress powder completes, the equalizer valve of opening pressurising pipeline carries out pressurising;
3) after pressurising completes, open with described winding-up tank and export the coal powder injection valve arranging on the winding-up arm being connected, the coal dust drain tank being blowed out is outward to the house steward that jets, by being arranged on pulverized coal flow variable valve and the coal power flowmeter fine adjustment winding-up amount on described winding-up house steward, described winding-up house steward vertically arranges, coal dust flows from bottom to top in winding-up house steward, open the tonifying Qi variable valve being arranged on described winding-up house steward simultaneously and carry out tonifying Qi adjusting, described tonifying Qi variable valve is arranged on the winding-up arm of multiple winding-up tanks and the below of described winding-up house steward junction;
4) primary mixture of winding-up house steward being sent sprays into blast furnace by divider and spray gun, keeps the constant of winding-up tank internal pressure by the pressure maintaining valve of voltage stabilizing pipeline;
5) after described winding-up tank has been jetted, to all the other winding-up tank repeating steps 1) to 4).
In such scheme, described step 2) in also comprise and open the step that lower equalizer valve carries out pressurising to winding-up tank tapering simultaneously.
In such scheme, described step 2) in also comprise the step of opening the tapering fluidisation variable valve of winding-up tank tapering fluidisation pipeline and the bottom fluidization variable valve of bottom fluidization pipeline simultaneously tapering and bottom section are carried out fluidisation.
In such scheme, described tapering fluidisation pipeline, bottom fluidization pipeline and voltage stabilizing pipeline are connected in same supply air line.
Compared with prior art, the beneficial effect that the present invention obtains is:
1) tonifying Qi variable valve of the present invention is arranged on the winding-up house steward of vertical setting, design can be in having guaranteed tonifying Qi regulatory function like this, reduced air compensation device equipment, the pipeline itself being brought by air compensation device equipment and himself wearing and tearing have not existed in the present invention naturally; The present invention adopts the mode in winding-up house steward one end tonifying Qi, and supplemental air flow is uniformly distributed on cross-section of pipeline, has reduced wearing and tearing;
2) because tonifying Qi point is below multiple described winding-up arms and described winding-up house steward junction, can reduce the probability of the stifled powder of winding-up arm and winding-up house steward junction;
3) because supplemental air flow is uniformly distributed on cross-section of pipeline, be that face contacts with primary mixture in winding-up house steward, tonifying Qi and the disturbance of primary mixture point of contact are little, be conducive to the stable conveying of coal dust, reduce delivering gas consumption meeting under pipeline smooth delivery of power coal dust (not plugging) prerequisite, be conducive to coal powder injection concentrated phase and carry;
4) tonifying Qi point is located at vertical winding-up house steward and is conducive to gas powder and mixes, and can avoid the impact of " density stream ", makes winding-up amount stable;
5) coal power flowmeter is arranged on vertical winding-up house steward above, is conducive to improve coal power flowmeter accuracy of measurement.Because pulverized coal flow measurement is relevant to flow velocity and coal powder density.If be located on the pipeline of level, because " density stream " can cause concentration distribution inequality, thereby affect Measuring Precision;
6) adopting controlling valve of voltage regulation can realize winding-up amount one-level regulates; Adopt pulverized coal flow variable valve and coal power flowmeter to form closed circuit control loop simultaneously, can realize winding-up amount secondary and regulate, in real time fine adjustment winding-up amount;
7) the winding-up tank top pressurising tank tapering pressurising of simultaneously jetting, and properly distributed winding-up tank top and tapering pressurized gas flow, contribute to the loose fluidisation of coal dust in tank, makes winding-up more even;
8) mode that adopts winding-up tank pressurising steam line and winding-up voltage stabilizing and fluidisation steam line to separate air feed, while avoiding jetting tank pressurising because large flow reduces winding-up voltage stabilizing, fluidisation supply gas pressure, thereby avoid winding-up process to produce pulsation, play the effect of uniform and stable winding-up, reduce the probability of winding-up line clogging.
Therefore, the present invention both can realize the uniform and stable winding-up of coal dust and winding-up amount is accurately controlled, and also can meet coal dust concentrated phase conveying technology and use high delivery ratio, low flow velocity pulverized coal conveying, reached low gas consumption, less pipeline wearing and tearing, uniform and stable winding-up effect.
Accompanying drawing explanation
The structural representation of the Pulverized Coal Injection System with Fuzzy that Fig. 1 provides for the embodiment of the present invention.
In figure: the 1-tank of jetting, 2-streaming tank, the 3-arm of jetting, 4-coal powder injection valve, the 5-house steward that jets, 6-pressurising pipeline, 7-equalizer valve, 8-voltage stabilizing pipeline, 9-pressure maintaining valve, 10-tonifying Qi pipeline, 11-tonifying Qi variable valve, 12-pulverized coal flow variable valve, 13-coal power flowmeter, 14-bottom pressurising branch road, equalizer valve under 15-, 16-tapering fluidisation pipeline, 17-bottom fluidization pipeline, 18-tapering fluidisation variable valve, 19-bottom fluidization variable valve, 20-supply air line.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described, and certain following embodiment should not be construed as limitation of the present invention.
As shown in Figure 1, the Pulverized Coal Injection System with Fuzzy that it provides for the embodiment of the present invention, it comprises three winding-up tanks 1 of arranging side by side, be arranged on the streaming tank 2 of each winding-up tank 1 bottom, export with each winding-up tank 1 the winding-up arm 3 being connected, be arranged on the coal powder injection valve 4 on each winding-up arm 3, the winding-up house steward 5 who is connected with the outlet of three described winding-up arms 3, the pressurising pipeline 6 being connected with each winding-up tank 1, be arranged on the equalizer valve 7 on described pressurising pipeline 6, the voltage stabilizing pipeline 8 being connected with each winding-up tank 1, be arranged on the pressure maintaining valve 9 on described voltage stabilizing pipeline 8, tonifying Qi pipeline 10, tonifying Qi variable valve 11, pulverized coal flow variable valve 12, and coal power flowmeter 13.
The embodiment of the present invention also comprises bottom pressurising branch road 14 and is arranged on the lower equalizer valve 15 on bottom pressurising branch road 14, and the tapering fluidisation pipeline 16 being connected with each winding-up tank 1, the bottom fluidization pipeline 17 being connected with each winding-up tank 1, is arranged on the tapering fluidisation variable valve 18 of described tapering fluidisation pipeline 16 and is arranged on the bottom fluidization variable valve 19 of bottom fluidization pipeline 17.The inlet end of bottom pressurising branch road 14 is connected with pressurising pipeline 6, and the outlet side of bottom pressurising branch road 14 is connected with the tapering of winding-up tank 1.Winding-up tank 1 adopts fluidisation top discharge form.Tapering fluidisation pipeline 16, bottom fluidization pipeline 17 and voltage stabilizing pipeline 8 are connected in same supply air line 20.
It should be noted that, in Fig. 1, only express pressurising pipeline, equalizer valve, voltage stabilizing pipeline, pressure maintaining valve, bottom pressurising branch road, lower equalizer valve, tapering fluidisation pipeline, bottom fluidization pipeline, tapering fluidisation variable valve and the bottom fluidization variable valve of one of them winding-up tank.In fact, other winding-up tank comprises these equipment too, does not show in the drawings.
The present invention also provides a kind of blast-furnace coal powder injection technique, it is characterized in that, it comprises the following steps:
1) one of them the winding-up tank 1 in multiple winding-up tanks of arranging is side by side filled to powder, all the other winding-up tanks do homework, until meet after winding-up condition in dormant state;
2) after dress powder completes, the equalizer valve 7 of opening pressurising pipeline 6 carries out pressurising;
3) after pressurising completes, open with described winding-up tank 1 and export the coal powder injection valve 4 arranging on the winding-up arm 3 being connected, the coal dust drain tank being blowed out is outward to the house steward 5 that jets, by being arranged on pulverized coal flow variable valve 12 and the coal power flowmeter 13 fine adjustment winding-up amounts on winding-up house steward 5, winding-up house steward 5 vertically arranges, coal dust flows from bottom to top in winding-up house steward 5, open the tonifying Qi variable valve 11 being arranged on winding-up house steward 5 simultaneously and carry out tonifying Qi adjusting, tonifying Qi variable valve 11 is arranged on the winding-up arm 3 of multiple winding-up tanks and the below of winding-up house steward 5 junctions;
4) primary mixture of winding-up house steward 5 being sent sprays into blast furnace by divider and spray gun, keeps the constant of winding-up tank internal pressure by the pressure maintaining valve of voltage stabilizing pipeline;
5) after described winding-up tank has been jetted, to all the other winding-up tank repeating steps 1) to 4).
Preferably, described step 2) in also comprise and open lower equalizer valve 15 to the winding-up tank 1 tapering step of carrying out pressurising simultaneously.
Preferably, described step 2) in also comprise the step of opening the tapering fluidisation variable valve 18 of winding-up tank tapering fluidisation pipeline 16 and the bottom fluidization variable valve 19 of bottom fluidization pipeline 17 simultaneously tapering and bottom section are carried out fluidisation.
It should be noted that, those of ordinary skill in the art should be appreciated that and can modify or be equal to replacement technical scheme of the present invention, and do not depart from aim and the scope of technical solution of the present invention, and it all should be encompassed in the middle of claim scope of the present invention.
Claims (2)
1. a Pulverized Coal Injection System with Fuzzy, it comprises multiple winding-up tanks of arranging side by side, be arranged on the streaming tank of each winding-up pot bottom, export with each winding-up tank the winding-up arm being connected, be arranged on the coal powder injection valve on each winding-up arm, the winding-up house steward who is connected with the outlet of multiple described winding-up arms, the pressurising pipeline being connected with each winding-up tank, be arranged on the equalizer valve on described pressurising pipeline, the voltage stabilizing pipeline being connected with each winding-up tank, be arranged on the pressure maintaining valve on described voltage stabilizing pipeline, tonifying Qi pipeline, tonifying Qi variable valve, pulverized coal flow variable valve, and coal power flowmeter, it is characterized in that, described winding-up house steward vertically arranges, described pulverized coal flow variable valve and coal power flowmeter are arranged on described winding-up house steward from bottom to top, described tonifying Qi pipeline is connected in described winding-up house steward's bottom, described tonifying Qi variable valve is arranged on winding-up house steward, described tonifying Qi variable valve is arranged on the below of multiple described winding-up arms and described winding-up house steward junction, described pulverized coal flow variable valve and coal power flowmeter are arranged on the top of multiple described winding-up arms and described winding-up house steward junction, described Pulverized Coal Injection System with Fuzzy also comprises bottom pressurising branch road and is arranged on the lower equalizer valve on described bottom pressurising branch road, the inlet end of described bottom pressurising branch road is connected with described pressurising pipeline, the outlet side of described bottom pressurising branch road is connected with the tapering of described winding-up tank, described Pulverized Coal Injection System with Fuzzy also comprises the tapering fluidisation pipeline being connected with each winding-up tank, the bottom fluidization pipeline being connected with each winding-up tank, be arranged on the tapering fluidisation variable valve of described tapering fluidisation pipeline, and be arranged on the bottom fluidization variable valve of described bottom fluidization pipeline, described tapering fluidisation pipeline, bottom fluidization pipeline, and voltage stabilizing pipeline is connected in same supply air line.
2. a kind of blast-furnace coal powder injection technique of utilizing the Pulverized Coal Injection System with Fuzzy described in claim 1 to implement, is characterized in that, it comprises the following steps:
1) one of them the winding-up tank in multiple winding-up tanks of arranging is side by side filled to powder, all the other winding-up tanks do homework, until meet after winding-up condition in dormant state;
2) after dress powder completes, the equalizer valve of opening pressurising pipeline carries out pressurising, open lower equalizer valve simultaneously pressurising is carried out in winding-up tank tapering, and open the tapering fluidisation variable valve of winding-up tank tapering fluidisation pipeline and the bottom fluidization variable valve of bottom fluidization pipeline carries out fluidisation to tapering and bottom section;
3) after pressurising completes, open with described winding-up tank and export the coal powder injection valve arranging on the winding-up arm being connected, the coal dust drain tank being blowed out is outward to the house steward that jets, by being arranged on pulverized coal flow variable valve and the coal power flowmeter fine adjustment winding-up amount on described winding-up house steward, described winding-up house steward vertically arranges, coal dust flows from bottom to top in winding-up house steward, open the tonifying Qi variable valve being arranged on described winding-up house steward simultaneously and carry out tonifying Qi adjusting, described tonifying Qi variable valve is arranged on the winding-up arm of multiple winding-up tanks and the below of described winding-up house steward junction;
4) primary mixture of winding-up house steward being sent sprays into blast furnace by divider and spray gun, keeps the constant of winding-up tank internal pressure by the pressure maintaining valve of voltage stabilizing pipeline;
5) after described winding-up tank has been jetted, to all the other winding-up tank repeating steps 1) to 4).
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102978310B (en) * | 2012-12-17 | 2014-09-10 | 武汉钢铁(集团)公司 | Coal powder injection method for blast furnace |
| CN106182433A (en) * | 2016-08-30 | 2016-12-07 | 苏州工机械有限公司 | Additive-adding device, mixing system and operational method thereof |
| CN109928215A (en) * | 2019-04-16 | 2019-06-25 | 中冶赛迪技术研究中心有限公司 | A kind of balk cargo pneumatic conveying experimental provision and method |
| CN111304391A (en) * | 2020-04-10 | 2020-06-19 | 青岛环瑞自动化科技有限公司 | Intelligent coal injection blind spot type fluidization side discharging system of blast furnace |
| CN114774601B (en) * | 2022-03-29 | 2024-01-23 | 青岛恒拓环保科技有限公司 | Intelligent coal injection control system of ironmaking blast furnace |
| CN115287383A (en) * | 2022-08-23 | 2022-11-04 | 孚洛泰(重庆)科技有限公司 | Blast furnace coal injection control method and control system |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899542A (en) * | 2010-08-05 | 2010-12-01 | 中冶南方工程技术有限公司 | Coal injection system of blast furnace |
| CN102154532A (en) * | 2011-05-26 | 2011-08-17 | 中冶赛迪工程技术股份有限公司 | Long-distance coal injection system |
| CN202881301U (en) * | 2012-08-21 | 2013-04-17 | 中冶南方工程技术有限公司 | Pulverized coal injection system of blast furnace |
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Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101899542A (en) * | 2010-08-05 | 2010-12-01 | 中冶南方工程技术有限公司 | Coal injection system of blast furnace |
| CN102154532A (en) * | 2011-05-26 | 2011-08-17 | 中冶赛迪工程技术股份有限公司 | Long-distance coal injection system |
| CN202881301U (en) * | 2012-08-21 | 2013-04-17 | 中冶南方工程技术有限公司 | Pulverized coal injection system of blast furnace |
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