CN213012930U - Coal powder conveying system for iron-making blast furnace capable of reducing maintenance and restart energy consumption - Google Patents
Coal powder conveying system for iron-making blast furnace capable of reducing maintenance and restart energy consumption Download PDFInfo
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- CN213012930U CN213012930U CN202021552932.4U CN202021552932U CN213012930U CN 213012930 U CN213012930 U CN 213012930U CN 202021552932 U CN202021552932 U CN 202021552932U CN 213012930 U CN213012930 U CN 213012930U
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Abstract
The application discloses reduce maintenance and restart buggy conveying system for iron-making blast furnace of energy consumption includes: the device comprises a first bin, a second bin, a third bin, a fourth bin, an air inlet pipeline and an air outlet pipeline; the air intake pipe includes: the conveying pump is communicated with the air inlet end of the first air inlet main pipe; the first intake manifold includes: the first air inlet section is communicated with the first bin and the second bin through pipelines respectively; the second air inlet section is respectively communicated with a third bin and a fourth bin through pipelines; the pressure reducing valve is arranged on a pipeline communicated with the first air inlet section and the second air inlet section; the gas outlet pipeline comprises: and the discharge ports of the first bin, the second bin, the third bin and the fourth bin are respectively communicated with a discharge main pipe. The system can avoid coke replacement when the storage bin is overhauled by removing coal from each blast furnace on the basis of not adding a new delivery pump, and the furnace condition is prevented from being influenced smoothly when the load is adjusted.
Description
Technical Field
The application relates to a coal powder conveying system for an iron-making blast furnace, which reduces maintenance and restart energy consumption and belongs to the technical field of iron-making.
Background
The heat energy required by the prior iron making is generated by burning coal through a blast furnace. The raw material used for coal stove combustion is pulverized coal, the pulverized coal is conveyed by air flow, in the blast furnace coal injection process, the storage bin is one of important devices, the storage bin is also called bin type pneumatic conveying pump to convey powdery materials by adopting a positive pressure pneumatic conveying mode, and the storage bin is widely applied to conveying materials such as fly ash, cement raw materials, mineral powder and the like in a power plant.
The pipeline connecting the storage bin and the storage bin is provided with a plurality of valves, and the valves are only used for 6-8 months and have to be replaced due to continuous scouring of the valves by air force and pulverized coal in the production process.
Simultaneously in the current blast furnace operation process, for reducing equipment input, adopt a feed bin to correspond three 30 tons feed bins of transfer station and carry out the buggy and carry out, the buggy is carried not consuming time and transport efficiency is low, the middle circulation transport of every shift has still not satisfied the jetting volume demand simultaneously, if during the planned maintenance with two platform pump conveying buggy because of the pipe diameter flow restriction, lead to the low pipeline that blocks up of compressed air pressure easily, in case the stifled pipe is difficult to dredge and causes long-time coal removal to be difficult to resume normal coal injection, the blast furnace is forced to add coke adjustment load, influence normal production, increase manufacturing cost.
In the operation process of the blast furnace, once a conveying pipeline and a valve are broken down and pulverized coal conveying needs to be interrupted for maintenance, the condition that pulverized coal supply of a single storage bin is short of the requirement for the coal removal of the blast furnace is easily caused, when a processing pipeline is maintained and the valve is replaced, old pulverized coal injection needs to be stored in advance, the pulverized coal conveyed by the single storage bin can only offset the amount of the pulverized coal injection at the moment of each hour, the pulverized coal cannot be stored to meet the requirement of the implementation of a preset maintenance plan, the equipment is in vicious circle operation, and finally the maintenance operation of the blast furnace is caused to be stopped.
Meanwhile, the coal supply operation time of the existing single storage bin is multiplied, the coal injection amount per hour of the 4 blast furnaces is not matched with the capacity of the single storage bin for conveying the three coal dust bins of the transfer station corresponding to the coal dust, and a coal dust conveying gap exists.
SUMMERY OF THE UTILITY MODEL
The application provides a pulverized coal conveying system for an iron-making blast furnace, which is used for solving the technical problems and reducing the overhauling and restarting energy consumption.
The application provides a reduce maintenance and restart buggy conveying system for iron-making blast furnace of energy consumption includes: the device comprises a first bin, a second bin, a third bin, a fourth bin, an air inlet pipeline and an air outlet pipeline;
the air intake pipe includes: the conveying pump is communicated with the air inlet end of the first air inlet main pipe;
the first intake manifold includes: the first air inlet section is communicated with the first bin and the second bin through pipelines respectively;
the second air inlet section is respectively communicated with a third bin and a fourth bin through pipelines;
the pressure reducing valve is arranged on a pipeline communicated with the first air inlet section and the second air inlet section;
the gas outlet pipeline comprises: and the discharge ports of the first bin, the second bin, the third bin and the fourth bin are respectively communicated with a discharge main pipe.
Preferably, the air intake line comprises: the first air inlet branch pipe, the second air inlet branch pipe, the third air inlet branch pipe and the fourth air inlet branch pipe are communicated with the first storage bin through a first air inlet branch pipe pipeline;
the first air inlet main pipe is communicated with the second storage bin through a second air inlet branch pipe pipeline;
the first air inlet main pipe is communicated with the third storage bin through a third air inlet branch pipe pipeline;
the first air inlet main pipe is communicated with the fourth storage bin through a fourth air inlet branch pipe.
Preferably, the air intake line comprises: the delivery pump is communicated with the air inlet end of the second air inlet main pipe; the pressure reducing valve is arranged on a pipeline communicated with the second air inlet main pipe and the delivery pump, the pressure reducing valve is arranged on an air inlet end of the second air inlet main pipe, and the second air inlet main pipe is communicated with the first storage bin, the second storage bin, the third storage bin and the fourth storage bin through pipelines respectively.
Preferably, the second intake manifold comprises: the fifth air inlet branch pipe, the sixth air inlet branch pipe, the seventh air inlet branch pipe and the eighth air inlet branch pipe are arranged on the second air inlet main pipe, and the second air inlet main pipe is communicated with the first air inlet branch pipe through a fifth air inlet branch pipe pipeline;
the second air inlet main is communicated with a second air inlet branch pipe pipeline through a sixth air inlet branch pipe;
the second air inlet main pipe is communicated with a third air inlet branch pipe through a seventh air inlet branch pipe;
the second air inlet main pipe is communicated with a fourth air inlet branch pipe through a sixth air inlet branch pipe.
Preferably, the outlet line comprises: a first discharging branch pipe and a second discharging branch pipe; the first discharging main pipe is communicated with the first storage bin through a first discharging branch pipe pipeline;
the first discharging main pipe is communicated with the second storage bin through a second discharging branch pipe.
Preferably, the outlet line comprises: the first discharge main pipe is communicated with the third storage bin through a third discharge branch pipe pipeline;
the first discharging main pipe is communicated with the fourth storage bin through a fourth discharging branch pipe.
Preferably, the pressure reducing valve includes: the first pressure reducing valve is arranged on the first air inlet main pipe; the second pressure reducing valve is arranged on the second air inlet main pipe
The beneficial effects that this application can produce include:
1) the utility model provides a reduce to overhaul and restart buggy conveying system for ironmaking blast furnace of energy consumption on not increasing the basis of new delivery pump, when stopping the feed bin and overhauing, each blast furnace all need the coal-off just can carry out the coke replacement, and the furnace condition is in the same direction as going influenced when avoiding adjusting the load.
2) The utility model provides a reduce maintenance and restart buggy conveying system for ironmaking blast furnace of energy consumption has avoided feed bin trouble to salvage completely and has leaded to a series of losses such as each blast furnace coal removal, adds coke and transfers load and subtract output, can normally incessant jetting buggy effectively guarantee during production, has guaranteed the blast furnace and has gone ahead to move output.
3) The utility model provides a reduce to overhaul and restart buggy conveying system for ironmaking blast furnace of energy consumption can guarantee changing the valve in-process, the coal dust that spouts does not appear taking off, can also realize that different feed bins overhaul, change the reasonable arrangement of part time, and this gas circuit can realize blowing coal dust while overhauing completely in using. Avoiding the economic loss caused by shutdown maintenance and reducing the production cost.
4) The utility model provides a reduce to overhaul and restart buggy conveying system for ironmaking blast furnace of energy consumption adopts two pipelines of double pump to carry the back, for changing the valve and overhauing and provide sufficient time, has avoided the tight insufficient nervous situation of the tight jetting coal of maintenance time confession, can find the trouble in time organize the maintenance processing, has improved the overhaul of equipments quality, and sustainable transport jetting buggy improves stable fuel for each blast furnace under any circumstance.
Drawings
FIG. 1 is a schematic diagram of a pulverized coal conveying system for an ironmaking blast furnace, which reduces overhaul restart energy consumption in one embodiment provided by the present application;
FIG. 2 is a schematic diagram of a pulverized coal conveying system for an ironmaking blast furnace, which reduces overhaul restart energy consumption in another embodiment provided by the present application;
illustration of the drawings:
10. a first storage bin; 22. a main discharge pipe; 221. a first discharge branch pipe; 222. a second discharge branch pipe; 223. a third discharge branch pipe; 224. a fourth discharge branch pipe; 20. a second storage bin; 30. a third storage bin; 40. a fourth storage bin; 24. a first intake manifold; 241. a first intake branch pipe; 242. a second intake branch pipe; 243. a third intake manifold; 244. a fourth intake manifold; 245. a first air intake section; 246. a second air intake section; 23. a second intake manifold; 231. a fifth intake manifold; 232. a sixth intake manifold; 233. a seventh intake manifold; 234. an eighth intake manifold; 21. a pressure reducing valve.
Detailed Description
The present application will be described in detail with reference to examples, but the present application is not limited to these examples.
Referring to fig. 1, the system for conveying pulverized coal for an ironmaking blast furnace, which reduces overhaul restart energy consumption, provided by the present application, includes: the device comprises a first bin 10, a second bin 20, a third bin 30, a fourth bin 40, an air inlet pipeline and an air outlet pipeline; the air intake pipe includes: the air inlet system comprises a delivery pump, a first air inlet main pipe 24 and a pressure reducing valve 21, wherein the delivery pump is communicated with the air inlet end of the first air inlet main pipe 24;
the first intake manifold 24 includes: the first air inlet section 245 and the second air inlet section 246 are communicated with each other, and the first air inlet section 245 is respectively communicated with the first storage bin 10 and the second storage bin 20 through pipelines; the second air inlet section 246 is respectively communicated with the third bin 30 and the fourth bin 40 through pipelines; the pressure reducing valve 21 is disposed on a pipeline through which the first air intake section 245 and the second air intake section 246 communicate;
the gas outlet pipeline comprises: the discharge ports of the discharge main pipe 22, the first bin 10, the second bin 20, the third bin 30 and the fourth bin 40 are respectively communicated with the discharge main pipe 22 through pipelines.
The existing conveying system only adopts a bin type pump to convey pulverized coal corresponding to three 30-ton bins of a transfer station, the time-consuming conveying efficiency is low, the requirement of injection amount cannot be met in class-to-class circulation conveying, if the pulverized coal is conveyed by using double pumps due to restriction of pipe diameter flow, the compressed air pressure is low, the pipeline is easy to block, once the pipeline is blocked, the long-time coal removal is difficult to recover normal coal injection due to difficult dredging of pipe blockage, and a blast furnace is forced to add coke to adjust the load to influence normal production.
According to this setting can be according to maintenance and production needs adjustment open first section 245 or the second section 246 of admitting air, adjust the atmospheric pressure of delivery pump in second section 246 of admitting air simultaneously through relief pressure valve 21, guarantee the transport to the material, the continuous transport of material when guaranteeing to overhaul avoids the shutdown maintenance, realizes that online production overhauls simultaneously.
After the double-pump double-pipeline conveying, sufficient time is provided for valve replacement and maintenance, the tension situation that the maintenance time is short and the coal injection supply is insufficient is avoided, faults can be found, maintenance treatment is organized in time, the equipment maintenance quality is improved, and the injected coal powder can be continuously conveyed to improve stable fuel for each blast furnace under any condition.
The 4 sets of bin type pumps are changed into double-pump double-pipeline conveying operation from single pipeline conveying operation, two pulverized coal bins are simultaneously conveyed and supplied, on the basis, in order to meet the requirement of double-pump type operation air supply, the first bin 10 and the second bin 20 correspondingly share the first air inlet section 245, the third bin 30 and the fourth bin 40 share the second air inlet section 246, and in order to achieve air balance and avoid air pressure low pipe blockage, the bin type operation is carried out in a cross mode.
Referring to fig. 2, preferably, the air intake circuit comprises: the first air inlet branch pipe 241, the second air inlet branch pipe 242, the third air inlet branch pipe 243 and the fourth air inlet branch pipe 244, and the first air inlet manifold 24 is in pipeline communication with the first storage bin 10 through the first air inlet branch pipe 241;
the first air inlet main pipe 24 is communicated with the second storage bin 20 through a second air inlet branch pipe 242;
the first air inlet main pipe 24 is communicated with the third storage bin 30 through a third air inlet branch pipe 243;
the first intake manifold 24 is in pipe communication with the fourth silo 40 via a fourth intake manifold 244.
Preferably, the air intake line comprises: the second air inlet manifold 23, the delivery pump communicates with air inlet end of the second air inlet manifold 23; the reducing valve 21 is arranged on a pipeline through which the second air inlet main 23 is communicated with the delivery pump, the reducing valve 21 is arranged on an air inlet end of the second air inlet main 23, and the second air inlet main 23 is respectively communicated with the first storage bin 10, the second storage bin 20, the third storage bin 30 and the fourth storage bin 40 through pipelines. Through setting up second inlet manifold 23, realize two gas circuit pay-offs, be convenient for divide the gas circuit to overhaul, improve maintenance efficiency, avoid overhauing the shut down.
The second intake manifold is communicated with the transfer pump through a three-way pipe or is arranged as a branch of the first intake manifold 24.
Preferably, the second intake manifold 23 comprises: the fifth air inlet branch pipe 231, the sixth air inlet branch pipe 232, the seventh air inlet branch pipe 233 and the eighth air inlet branch pipe 234 are arranged on the second air inlet manifold 23, and the second air inlet manifold 23 is communicated with the first air inlet branch pipe 241 through the fifth air inlet branch pipe 231;
the second air inlet manifold 23 is communicated with the second air inlet branch pipe 242 through a sixth air inlet branch pipe 232;
the second air inlet manifold 23 is in pipeline communication with the third air inlet branch pipe 243 through the seventh air inlet branch pipe 233;
the second intake manifold 23 is in pipe communication with the fourth intake branch 244 through a sixth intake branch.
According to the arrangement, the two sets of gas paths can be used for simultaneously introducing gas, the overhaul safety and reliability are increased, the conveying capacity of materials during overhaul is guaranteed, the heat output of the blast furnace during overhaul is guaranteed, the coking coal is not required to be used for replacing, and the production cost is reduced. At the same time, the air flow can be effectively controlled by providing the pressure reducing valve 21 on the second air inlet manifold 23.
Preferably, the outlet line comprises: a first discharging branch pipe 221 and a second discharging branch pipe 222; the first discharging main pipe 22 is in pipeline communication with the first storage bin 10 through a first discharging branch pipe 221;
the first discharging main pipe 22 is in pipeline communication with the second storage bin 20 through a second discharging branch pipe 222.
According to the setting, the accurate control of discharging of each bin can be realized, and the discharging condition of the bins can be conveniently regulated and controlled according to the maintenance requirements.
Preferably, the outlet line comprises: the third discharge branch pipe 223, the fourth discharge branch pipe 224, the first discharge header 22 and the third storage bin 30 are communicated through a third discharge branch pipe 223 pipeline;
the first discharge main 22 is in pipe communication with the fourth storage bin 40 via a fourth discharge branch 224.
Preferably, the pressure reducing valve 21 includes: a first pressure reducing valve 21 and a second pressure reducing valve 21, the first pressure reducing valve 21 being provided on the first intake manifold 24; the second pressure reducing valve 21 is provided on the second intake manifold 23.
In one embodiment, the pressure relief valve used is a DN80 pressure relief valve; the first intake manifold 24 and the second intake manifold 23 are seamless pipes of 20 m DN80, and the intake manifolds can be used for conveying compressed air. In the embodiment, 20 m of DN80 seamless pipe is taken as the material, one DN80 reducing valve is used, the total number is 2000 yuan, and the working hours are 6 hours. The maintenance can be realized without stopping under the condition of lower cost, and the conveying effect is ensured.
Reference throughout this specification to "one embodiment," "another embodiment," "an embodiment," "a preferred embodiment," or the like, means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment described generally in this application. The appearances of the same phrase in various places in the specification are not necessarily all referring to the same embodiment. Further, when a particular feature, structure, or characteristic is described in connection with any embodiment, it is submitted that it is within the scope of the disclosure to effect such feature, structure, or characteristic in connection with other embodiments.
Although the present application has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this disclosure. More specifically, various variations and modifications are possible in the component parts and/or arrangements of the subject combination arrangement within the scope of the disclosure and claims of this application. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.
Claims (7)
1. The utility model provides a reduce maintenance and restart buggy conveying system for iron-making blast furnace of energy consumption which characterized in that includes: the device comprises a first storage bin (10), a second storage bin (20), a third storage bin (30), a fourth storage bin (40), an air inlet pipeline and an air outlet pipeline;
the intake pipe includes: the air inlet system comprises a delivery pump, a first air inlet main pipe (24) and a pressure reducing valve (21), wherein the delivery pump is communicated with the air inlet end of the first air inlet main pipe (24);
the first intake manifold (24) includes: the first air inlet section (245) and the second air inlet section (246) are communicated with each other, and the first air inlet section (245) is respectively communicated with the first storage bin (10) and the second storage bin (20) through pipelines;
the second air inlet section (246) is respectively communicated with the third storage bin (30) and the fourth storage bin (40) through pipelines;
the pressure reducing valve (21) is arranged on a pipeline communicated with the first air inlet section (245) and the second air inlet section (246);
the gas outlet pipeline comprises: and discharge holes of the discharge main pipe (22), the first storage bin (10), the second storage bin (20), the third storage bin (30) and the fourth storage bin (40) are respectively communicated with a pipeline of the discharge main pipe (22).
2. The pulverized coal conveying system for the ironmaking blast furnace for reducing the overhaul restart energy consumption as claimed in claim 1, wherein the air inlet pipeline comprises: the first air inlet branch pipe (241), the second air inlet branch pipe (242), the third air inlet branch pipe (243) and the fourth air inlet branch pipe (244), wherein the first air inlet main pipe (24) is communicated with the first storage bin (10) through a first air inlet branch pipe (241) in a pipeline manner;
the first air inlet main pipe (24) is communicated with the second storage bin (20) through a second air inlet branch pipe (242) in a pipeline way;
the first air inlet main pipe (24) is communicated with the third storage bin (30) through a third air inlet branch pipe (243) by a pipeline;
the first air inlet main pipe (24) is communicated with the fourth storage bin (40) through a fourth air inlet branch pipe (244).
3. The pulverized coal conveying system for the ironmaking blast furnace for reducing the overhaul restart energy consumption as claimed in claim 2, wherein the air inlet pipeline comprises: the delivery pump is communicated with the air inlet end of the second air inlet manifold (23); the reducing valve (21) is arranged on a pipeline communicated with the second air inlet main pipe (23) and the delivery pump, and the second air inlet main pipe (23) is respectively communicated with the first storage bin (10), the second storage bin (20), the third storage bin (30) and the fourth storage bin (40) through pipelines.
4. The pulverized coal delivery system for ironmaking blast furnaces with reduced overhaul restart energy consumption according to claim 3, characterized in that the second air intake manifold (23) comprises: the fifth air inlet branch pipe (231), the sixth air inlet branch pipe (232), the seventh air inlet branch pipe (233) and the eighth air inlet branch pipe (234) are arranged on the second air inlet manifold (23), and the second air inlet manifold (23) is communicated with the first air inlet branch pipe (241) through the fifth air inlet branch pipe (231);
the second air inlet manifold (23) is communicated with the second air inlet branch pipe (242) through a sixth air inlet branch pipe (232);
the second air inlet manifold (23) is communicated with the third air inlet branch pipe (243) through a seventh air inlet branch pipe (233) by pipelines;
the second air inlet manifold (23) is communicated with a fourth air inlet branch pipe (244) through a sixth air inlet branch pipe.
5. The pulverized coal conveying system for the ironmaking blast furnace for reducing the overhaul restart energy consumption as claimed in claim 1, wherein the gas outlet pipeline comprises: a first discharging branch pipe (221) and a second discharging branch pipe (222); the first discharging main pipe (22) is communicated with the first storage bin (10) through a first discharging branch pipe (221) by a pipeline;
the first discharging main pipe (22) is communicated with the second storage bin (20) through a second discharging branch pipe (222).
6. The pulverized coal conveying system for the ironmaking blast furnace for reducing the overhaul restart energy consumption as claimed in claim 1, wherein the gas outlet pipeline comprises: the first discharging main pipe (22) is communicated with the third storage bin (30) through a third discharging branch pipe (223) pipeline;
the first discharging main pipe (22) is communicated with the fourth storage bin (40) through a fourth discharging branch pipe (224).
7. The pulverized coal delivery system for ironmaking blast furnaces with reduced overhaul restart energy consumption according to claim 3, characterized in that the pressure reducing valve (21) comprises: a first pressure reducing valve (21) and a second pressure reducing valve (21), wherein the first pressure reducing valve (21) is arranged on a first air inlet main pipe (24); the second pressure reducing valve (21) is provided on the second intake manifold (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021552932.4U CN213012930U (en) | 2020-07-30 | 2020-07-30 | Coal powder conveying system for iron-making blast furnace capable of reducing maintenance and restart energy consumption |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021552932.4U CN213012930U (en) | 2020-07-30 | 2020-07-30 | Coal powder conveying system for iron-making blast furnace capable of reducing maintenance and restart energy consumption |
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| Publication Number | Publication Date |
|---|---|
| CN213012930U true CN213012930U (en) | 2021-04-20 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021552932.4U Active CN213012930U (en) | 2020-07-30 | 2020-07-30 | Coal powder conveying system for iron-making blast furnace capable of reducing maintenance and restart energy consumption |
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|---|---|
| CN (1) | CN213012930U (en) |
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- 2020-07-30 CN CN202021552932.4U patent/CN213012930U/en active Active
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