CN105177201B - Improved blast furnace coal injection tank and injection method - Google Patents
Improved blast furnace coal injection tank and injection method Download PDFInfo
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- CN105177201B CN105177201B CN201510488469.9A CN201510488469A CN105177201B CN 105177201 B CN105177201 B CN 105177201B CN 201510488469 A CN201510488469 A CN 201510488469A CN 105177201 B CN105177201 B CN 105177201B
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Abstract
The invention provides an improved blast furnace coal injection tank and an injection method, and belongs to the technical field of blast furnace coal injection. Lower conical part fluidization holes are formed between upper conical part fluidization holes in a coal injection tank body and a fluidized bed, and a pressure-stabilized fluidization hole is formed between the upper conical part fluidization holes and a fluidization plate. The lower portion of a lower coal valve is connected with a nitrogen purging pipe, and a nitrogen purging valve is arranged on the nitrogen purging pipe. An acceleration device is arranged in a metal flexible connector between a coal discharge hand valve and a coal discharge valve. A nitrogen reversely-purging pipe is installed on a coal discharge pipe body between the coal discharge valve and a coal feed valve. A gas filter net is installed on a powder return pipe. Injection achieved through the improved blast furnace coal injection tank includes a diffusing process, a coal loading process, a pressurized fluidization process and an injection pressure-stabilizing control process. By means of the improved blast furnace coal injection tank and the injection method, the problems of insufficient fluidization, uneven coal discharge and an unstable rate of the coal injection tank in the background technology are solved, and the accuracy and the uniformity ratio of coal injection are increased; meanwhile, gas energy consumption and equipment damage are reduced, the blast furnace coal rate is increased indirectly, the coke rate is lowered, the technological process of a coal injection system is improved, and the injection stability is improved.
Description
Technical field
The present invention relates to a kind of improved pulverized coal injection tank and blowing method, belong to technical field of blast furnace coal.
Background technology
Adopt more pulverized coal injection and tank does not stop coal without interval flow pattern to ensure blast furnace, A tanks injection time=B tanks are diffused
Time+B canned+B tanks waiting time coal time+B tank pressurising time.Accurately equably injection is conducive to stablizing blast furnace operating coal dust
With blast furnace temperature control, while coal combustion rate can be improved, blast furnace coal ratio is improved, reduce coke ratio.Powder fluidized in coal powder injection tank
Quality decide coal dust conveying it is whether smooth, especially from coal powder injection tank to air compensation regulator this segment distance conveying, conveying
During effect difference, injection rate will fluctuation, or even stop coal, affect blast furnace normally to smelt.At present, most enterprises blast furnace spray
Coal tank is respectively mounted lower coal as shown in figure 1, mainly include the Pulverized Coal Bin and coal powder injection tank by being interconnected communicating pipe on communicating pipe
Valve and coal feeding valve, are provided with the back powder pipe of straight-through Pulverized Coal Bin between lower coal valve and coal feeding valve, diffuse greatly, in diffuse and be located at little diffusing
It is sequentially provided with fluidized plate, upper tapering fluidisation hole, fluid bed and bottom fluidization hole in coal powder injection tank top, coal powder injection tank from top to bottom, on
Tapering fluidisation hole, bottom fluidization hole are connected respectively with upper tapering fluidisation pipe, bottom fluidization pipe, and upper tapering fluidisation is managed and bottom fluidization
Tapering fluidisation valve and bottom fluidization valve are respectively mounted on pipe body, are installed out successively from left to right on coal powder injection tank coal output pipe body
Coal handss valve, metal be flexible coupling, produce coal and valve and give coal valve, and big pressurising pipe is installed on coal powder injection tank top, and big equalizer valve is installed thereon；This
The coal powder injection tank of structure is planted by the way of the pressurising of top, pressurising throughput is big, and the coal dust in coal powder injection tank is compacted from top, bottom
Fluidisation, upper tapering fluidisation are just opened in injection, and coal dust fails fully fluidisation in tank, it is impossible to ensure the coefficient of stabilization of pulverized coal injection；
Additionally, the coal injection system of this kind of structure also has following weak point：（1）During injection, the pressure change of coal powder injection tank is larger, leads
Speed fluctuation is caused, the breathability of the blast furnace bed of material is affected；（2）Directly in blowing process, due to easy canopy at Pulverized Coal Bin feed opening
Material, the time of coalingging is longer, and the pressurising time is forced to shorten, and affects the fluidisation of coal dust in coal powder injection tank；（3）Coal powder injection tank coal outlet is to QI invigorating
Actuator this segment distance belongs to Condensed transportation, and conveying effect is poor, easily blocks pipeline；（4）Back powder pipe is easily blocked, and affects to claim
Weight, especially affects the series another tank to weigh during coalingging, and causes coal powder injection rate fluctuation；（5）Equipment easily grind Lou, damage
Bad, Gas Energy Source consumption is big, wastes serious.
The content of the invention
The technical problem to be solved is to provide a kind of improved pulverized coal injection tank and blowing method, by spray
The improvement of coal jar structure, accordingly changes blowing process, realizes lifting powder fluidized effect, improves the evening ratio and accuracy rate of coal powder injection
Purpose, while reduce breeze blowing rate fluctuation and device damage, solve background technology defect.
The technical scheme is that：
A kind of improved pulverized coal injection tank, composition includes the Pulverized Coal Bin by being interconnected communicating pipe and coal powder injection tank, even
Lower coal valve and coal feeding valve are respectively mounted on siphunculus, the back powder pipe of straight-through Pulverized Coal Bin, coal powder injection tank are provided between lower coal valve and coal feeding valve
Top be provided with diffuse greatly, in diffuse and diffused with little, is sequentially provided with fluidized plate, upper tapering fluidisation hole, stream in coal powder injection tank from top to bottom
Change bed and bottom fluidization hole, upper tapering fluidisation hole, bottom fluidization hole are connected respectively with upper tapering fluidisation pipe, bottom fluidization pipe, on
Tapering fluidisation valve and bottom fluidization valve, coal powder injection tank coal output pipe body are respectively mounted on tapering fluidisation pipe and bottom fluidization pipe body
On produce coal handss valve, metal are installed successively from left to right are flexible coupling, produce coal and valve and give coal valve, big pressurising pipe is installed on coal powder injection tank deck
Portion, installs thereon big equalizer valve；Its improvements is：Lower cone is provided with coal powder injection tank between upper tapering fluidisation hole and fluid bed
Portion fluidizes hole, and voltage stabilizing fluidisation hole, hypocone fluidisation hole and voltage stabilizing fluidisation hole difference are provided between upper tapering fluidisation hole and fluidized plate
It is connected with hypocone fluidisation pipe and voltage stabilizing fluidisation pipe, on hypocone fluidisation pipe and voltage stabilizing fluidisation pipe body hypocone stream is respectively mounted
Change valve and voltage stabilizing fluidisation valve；Lower coal valve bottom connects nitrogen sparge tube, and nitrogen purge valve is installed thereon；Produce coal handss valve and the valve that produces coal
Middle metal is flexible coupling middle installation accelerator；Produce coal valve and on the coal output pipe body in the middle of coal valve install nitrogen blowback
Pipe, installs thereon nitrogen back-flushing valve；Gas filter screen is installed on back powder pipe.
Above-mentioned a kind of improved pulverized coal injection tank, the upper tapering fluidisation hole is 4, positioned at away from the tank bottoms height of coal powder injection tank
Two orthogonal diameter end points of the same circumference at 1500mm ~ 1700mm；The hypocone fluidisation hole is 2, is located at
The end points of a diameter of same circumference at the tank bottoms high 600mm ~ 800mm of coal powder injection tank；The bottom fluidization hole is 2, is located at
The end points of one diameter of same circumference away from coal powder injection tank axis vertical dimension 150mm ~ 170mm；The voltage stabilizing fluidisation hole is 1
It is individual, away from tank bottoms 2500 mm of the vertical dimension ~ 3000mm of coal powder injection tank；The fluid bed is located at away from the tank bottoms vertical dimension of coal powder injection tank
At 300mm ~ 500mm；
Above-mentioned a kind of improved pulverized coal injection tank, it is described be installed on to produce coal handss valve and produce coal during valve intermetallic metal is flexible coupling
Accelerator be two ends for bell mouth shape wear-resisting alloy pipe；The nitrogen anti-blowpipe is outlet towards the right angle to coal valve
Pipe, caliber is less than coal output pipe caliber.
A kind of method for carrying out breeze blowing using above-mentioned improved pulverized coal injection tank, including diffusing process control, coaling
Process control, pressurising fluid mapper process are controlled and are blown voltage stabilizing process control operation, and its improvements is：
The process of diffusing is：First open it is little diffuse, in diffuse by coal powder injection tank pressure inside the tank unload to 0.25 Mpa ~
0.30Mpa, then open to diffuse greatly and all draw off pressure；
The process of coalingging is：Coal feeding valve is first opened, lower coal valve and nitrogen purge valve are opened after 7s ~ 10s, coal powder injection is canned
After 15t ~ 20t coal dusts, lower coal valve and nitrogen purge valve are first closed, coal feeding valve is closed after 23s ~ 30s, it is ensured that the coal dust not company of remaining in
In siphunculus, afterwards, close big diffusion valve and diffuse with；
The pressurising fluid mapper process is：Close and give coal valve, open the valve that produces coal, nitrogen back-flushing valve, upper tapering fluidisation valve, lower cone
Portion fluidizes valve and bottom fluidization valve carries out pressurising fluidisation, adjusts nitrogen flow, makes QOn：QUnder：QBottom：QInstead=5:5:6:6（QOn- epicone
Nitrogen flow in portion's fluidisation pipe；QUnderNitrogen flow in-hypocone fluidisation pipe；QBottomNitrogen flow in-bottom fluidization pipe；QInstead- nitrogen
Nitrogen flow in gas anti-blowpipe）；
It is described injection voltage stabilizing process be：Opening produce coal valve, to coal valve, upper tapering fluidisation valve, hypocone fluidisation valve, bottom stream
Change valve and nitrogen back-flushing valve, closing is diffused diffused with greatly, it is little to diffuse with voltage stabilizing fluidisation valve according to actual tank pressure and setting tank pressure
Difference automatically adjust.
Above-mentioned coal powder injection method, in the injection voltage stabilizing process it is little diffuse with voltage stabilizing fluidisation valve according to actual tank pressure and
Set tank pressure difference automatically adjust mode as：When actual tank pressure is higher than setting tank pressure 0.06Mpa ~ 0.08Mpa, little diffusing is beaten
Open, it is little to diffuse closing when both are equal；When actual tank pressure is less than setting tank pressure 0.06Mpa ~ 0.08Mpa, voltage stabilizing fluidisation valve
Open, when both are equal, voltage stabilizing fluidisation valve is closed.
Beneficial effects of the present invention are：
The nitrogen sparge tube that the present invention is installed can be prevented effectively from because coal threshold switch is not in place under scaffold, shortened when coalingging
Between, it is that pressurising fluidisation has got the time, after including automated procedures, the time of coalingging shortens to 1 ~ 1.5min by 8 ~ 10min；Install
Accelerate coal dust flowing, the effect of stable injection in the accelerator during coal output pipe metal is flexible coupling, while also increasing soft company
The service life for connecing；Nitrogen anti-blowpipe makes coal dust more fully fluidize in pressurising fluid mapper process, beneficial to stable injection, is blown
Cheng Zhongke accelerates coal dust flowing；The gas filter screen on back powder pipe is installed on during coalingging, only allows gas to pass through, coal dust falls
Return coal powder injection tank, it is to avoid affect to weigh after back powder line clogging, that is, reduce the rate fluctuation produced when coalingging.
The problems such as present invention solves the insufficient, inequality of producing coal of coal powder injection tank fluidisation in background technology, speed is unstable, improves
The accuracy rate and evening ratio of coal powder injection, while reducing consumption and the device damage of Gas Energy Source, improves blast furnace coal ratio indirectly, drop
Low coke ratio.By adjusting pressurising fluidization parameters, increase nitrogen back-flushing valve, accelerator, transforming the mode of back powder pipe improves
The technological process of coal injection system, improves injection coefficient of stabilization, prevented because coal powder injection rate fluctuation causes the situation of blast furnace checking, be
Blast furnace direct motion steady in a long-term creates advantage.As injecting coal quantity progressively becomes big, by upper tapering fluidisation, hypocone fluidisation, bottom
Portion's fluidisation, blowback nitrogen tolerance are progressively increased, and have kept up with blast fumance rhythm, meet production requirement.
Description of the drawings
Fig. 1 is that tank schematic diagram is blown in prior art；
Fig. 2 is present invention injection tank schematic diagram；
Fig. 3 is accelerator schematic diagram；
It is labeled as in figure：Pulverized Coal Bin 1, coal powder injection tank 2, communicating pipe 3, lower coal valve 4, coal feeding valve 5, back powder pipe 6, diffuse 7 greatly, in
Diffuse 8, the little 9, fluidized plate 10, upper tapering of diffusing and fluidize hole 11, fluid bed 12, bottom fluidization hole 13, upper tapering fluidisation pipe 14, bottom
Portion's fluidisation pipe 15, upper tapering fluidisation valve 16, bottom fluidization valve 17, coal output pipe 18, the handss valve 19, metal that produces coal are flexible coupling 20, produce coal
Valve 21, to coal valve 22, big pressurising pipe 23, big equalizer valve 24, hypocone fluidisation hole 25, voltage stabilizing fluidisation hole 26, hypocone fluidisation pipe
27th, voltage stabilizing fluidisation pipe 28, hypocone fluidisation valve 29, voltage stabilizing fluidisation valve 30, nitrogen sparge tube 31, nitrogen purge valve 32, plus quick-mounting
Put 33, nitrogen anti-blowpipe 34, nitrogen back-flushing valve 35, gas filter screen 36.
Specific embodiment
Fig. 2-Fig. 3 shows that a kind of improved pulverized coal injection tank of the present invention, composition includes being interconnected by communicating pipe 3
Pulverized Coal Bin 1 and coal powder injection tank 2, be respectively mounted lower coal valve 4 and coal feeding valve 5 on communicating pipe 3, the lower bottom of coal valve 4 connection nitrogen purging
Pipe 31, installs thereon nitrogen purge valve 32；The back powder pipe 6 of straight-through Pulverized Coal Bin 1, back powder pipe are provided between lower coal valve 4 and coal feeding valve 5
Gas filter screen 36 is installed on 6；The top of coal powder injection tank 2 is provided with and diffuse greatly 7, in diffuse 8 and it is little diffuse in 9, coal powder injection tank 2 from top to bottom according to
It is secondary to be provided with fluidized plate 10, voltage stabilizing fluidisation hole 26, upper tapering fluidisation hole 11, hypocone fluidisation hole 25, fluid bed 12 and bottom fluidization
Hole 13, voltage stabilizing fluidisation hole 26, upper tapering fluidisation hole 11, hypocone fluidisation hole 25, bottom fluidization hole 13 are managed respectively with voltage stabilizing fluidisation
28th, upper tapering fluidisation pipe 14, hypocone fluidisation pipe 27, bottom fluidization pipe 15 connect, voltage stabilizing fluidisation pipe 28, upper tapering fluidisation pipe
14th, voltage stabilizing fluidisation valve 30, upper tapering fluidisation valve 16, hypocone stream are respectively mounted on hypocone fluidisation pipe 27, bottom fluidization pipe 15
Change valve 29 and bottom fluidization valve 17；Handss valve 19, metal soft company of producing coal is installed successively from left to right on the body of coal powder injection tank coal output pipe 18
Connect 20, produce coal valve 21 and to coal valve 22, metal is flexible coupling in 20 and installs accelerator 33, and it is horn mouth that accelerator 33 is two ends
The wear-resisting alloy pipe of shape；Produce coal valve 21 and to nitrogen anti-blowpipe 34 is installed on the body of coal output pipe 18 in the middle of coal valve 22, pacifies thereon
Dress nitrogen back-flushing valve 35, nitrogen anti-blowpipe 34 is for outlet towards the ell to coal valve 22, pipe of its caliber less than coal output pipe 18
Footpath；Big pressurising pipe 23 is installed on the top of coal powder injection tank 2, and big equalizer valve 24 is installed thereon.
Fig. 2 shows that fluidisation hole 11 in tapering is 4 in the present invention, positioned at the tank bottoms high 1500mm ~ 1700mm of coal powder injection tank 2
Two orthogonal diameter end points of same circumference；Hypocone fluidisation hole 25 be 2, positioned at away from the tank bottoms high 600mm of coal powder injection tank ~
The end points of a diameter of same circumference at 800mm；Bottom fluidization hole 13 is 2, positioned at away from the axis vertical dimension of coal powder injection tank 2
The end points of one diameter of same circumference of 150mm ~ 170mm；Voltage stabilizing fluidisation hole 26 is 1, away from the tank bottoms vertical dimension of coal powder injection tank 2
2500 mm ~3000mm；Fluid bed 12 is located at tank bottoms vertical dimension 300mm of coal powder injection tank ~ 500mm.
Present invention additionally comprises the method for carrying out breeze blowing using above-mentioned coal powder injection tank, including diffusing process control, coaling
Process control, the control of pressurising fluid mapper process and injection voltage stabilizing process control operation, during diffusing, tank when being worked due to coal powder injection tank 2
Interior pressure is 0.6 Mpa ~ 0.7Mpa, diffuses that too fast generation impulse force is excessive to cause coal powder injection rate fluctuation, and equipment attrition is tight
Weight, to diffuse cause slowly and diffused overlong time, affected pressurising fluid mapper process control program, took into account from the aspect of two, diffused process
Control measure are：First open it is little diffuse, in diffuse and pressure inside the tank unloaded to 0.25 Mpa ~ 0.30Mpa, then open diffuse greatly by
Pressure all draws off；
Coaling process control：Coal feeding valve is first opened, lower pulverized coal valve and nitrogen purge valve, the canned 15t of coal powder injection are opened after 7 ~ 10s
After ~ 20t coal dusts, lower coal valve and nitrogen purge valve are first closed, coal feeding valve is closed after 23s ~ 30s, it is ensured that coal dust does not remain in connection
In pipe, afterwards, close big diffusion valve and diffuse with；During coalingging, 36 permissions of gas filter screen being installed on back powder pipe 6
Gas passes through, and coal dust drops back into coal powder injection tank 2, it is to avoid affects to weigh after the line clogging of back powder pipe 6, can reduce the speed produced when coalingging
Fluctuation.
Pressurising fluid mapper process is controlled：Close to coal valve 22, open the valve 21 that produces coal, nitrogen back-flushing valve 35, upper tapering fluidisation valve
16th, hypocone fluidisation valve 29 and bottom fluidization valve 17 carry out pressurising fluidisation, adjust nitrogen flow, make QOn：QUnder：QBottom：QInstead=5:5:6:
6（QOnNitrogen flow in-upper tapering fluidisation pipe；QUnderNitrogen flow in-hypocone fluidisation pipe；QBottomNitrogen in-bottom fluidization pipe
Flow；QInsteadNitrogen flow in-nitrogen anti-blowpipe）；Due to blowback nitrogen it is not symmetrical with other any air-flows so that coal dust is more
Fully fluidize, beneficial to stable injection.
Injection voltage stabilizing process control：Opening produce coal valve 21, to coal valve 22, upper tapering fluidisation valve 16, hypocone fluidisation valve 29,
Bottom fluidization valve 17 and nitrogen back-flushing valve 35, closing diffuse greatly 7 and in diffuse 8, it is little diffuse 9 and voltage stabilizing fluidize valve 30 according to reality
The difference of tank pressure and setting tank pressure is automatically adjusted：It is little to diffuse 9 when actual tank pressure is higher than setting tank pressure 0.06Mpa ~ 0.08Mpa
Open, it is little to diffuse 9 closings when both are equal；When actual tank pressure is less than setting tank pressure 0.06Mpa ~ 0.08Mpa, voltage stabilizing stream
Change valve 30 to open, when both are equal, voltage stabilizing fluidisation valve 30 is closed, during injection, the tank pressure of coal powder injection tank 2 be 0.6 Mpa ~
0.7Mpa, blowback nitrogen pressure more than the tank pressure of coal powder injection tank 2, produce coal valve 21 and to coal valve 22 by opening, and blowback nitrogen can accelerate coal
Powder flows and stable injection.
Claims (5)
1. a kind of improved pulverized coal injection tank, composition was included by communicating pipe（3）The Pulverized Coal Bin being interconnected（1）With coal powder injection tank
（2）, communicating pipe（3）On be respectively mounted lower coal valve（4）And coal feeding valve（5）, lower coal valve（4）And coal feeding valve（5）Between be provided with straight-through
Pulverized Coal Bin（1）Back powder pipe（6）, coal powder injection tank（2）Top is provided with diffuses greatly（7）, in diffuse（8）Diffuse with little（9）, coal powder injection tank
（2）Fluidized plate is inside sequentially provided with from top to bottom（10）, upper tapering fluidize hole（11）, fluid bed（12）With bottom fluidization hole（13）,
Upper tapering fluidizes hole（11）, bottom fluidization hole（13）Manage with upper tapering fluidisation respectively（14）, bottom fluidization pipe（15）Connection, epicone
Portion's fluidisation pipe（14）With bottom fluidization pipe（15）Tapering fluidisation valve is respectively mounted on body（16）With bottom fluidization valve（17）, spray
Coal tank（2）Coal output pipe（18）The handss valve that produces coal is installed successively from left to right on body（19）, metal is flexible coupling（20）, produce coal valve（21）
With to coal valve（22）, big pressurising pipe（23）It is installed on coal powder injection tank（2）Top, installs thereon big equalizer valve（24）；It is characterized in that：
Coal powder injection tank（2）Upper tapering fluidisation hole in tank body（11）With fluid bed（12）Between be provided with hypocone fluidisation hole（25）, upper tapering stream
Change hole（11）With fluidized plate（10）Between be provided with voltage stabilizing fluidisation hole（26）, hypocone fluidisation hole（25）Hole is fluidized with voltage stabilizing（26）Point
Do not manage with hypocone fluidisation（27）Manage with voltage stabilizing fluidisation（28）Connection, hypocone fluidisation pipe（27）Manage with voltage stabilizing fluidisation（28）Body
On be respectively mounted hypocone fluidisation valve（29）Valve is fluidized with voltage stabilizing（30）；Lower coal valve（4）Bottom connects nitrogen sparge tube（31）, its
Upper installation nitrogen purge valve（32）；Produce coal handss valve（19）With the valve that produces coal（21）Middle metal is flexible coupling（20）It is middle to install plus quick-mounting
Put（33）；Produce coal valve（21）With to coal valve（22）Middle coal output pipe（18）Nitrogen anti-blowpipe is installed on body（34）, pacify thereon
Dress nitrogen back-flushing valve（35）；Back powder pipe（6）Upper installation gas filter screen（36）.
2. a kind of improved pulverized coal injection tank as claimed in claim 1, it is characterised in that：The upper tapering fluidisation hole is（11）
4, positioned at away from coal powder injection tank（2）Two orthogonal diameter end points of the same circumference at tank bottoms high 1500mm ~ 1700mm；Institute
State hypocone fluidisation hole（25）For 2, positioned at away from coal powder injection tank（2）A diameter of same circumference at tank bottoms high 600mm ~ 800mm
End points；The bottom fluidization hole（13）For 2, positioned at away from coal powder injection tank（2）Axis vertical dimension 150mm ~ 170mm's is same
The end points of one diameter of circumference；The voltage stabilizing fluidizes hole（26）For 1, away from coal powder injection tank（2）The mm of tank bottoms vertical dimension 2500 ~
3000mm；The fluid bed（12）Positioned at away from coal powder injection tank（2）At tank bottoms vertical dimension 300mm ~ 500mm.
3. a kind of improved pulverized coal injection tank as claimed in claim 1, it is characterised in that：It is described to be installed on the handss valve that produces coal（19）
With the valve that produces coal（21）Intermetallic metal is flexible coupling（20）In accelerator（33）For the wear-resisting alloy pipe that two ends are bell mouth shape；Institute
State nitrogen anti-blowpipe（34）It is to export towards to coal valve（22）Ell, caliber be less than coal output pipe（18）Caliber.
4. the method that the improved pulverized coal injection tank described in a kind of any one of utilization claim 1～3 carries out breeze blowing, including
Diffuse process control, process control of coalingging, the control of pressurising fluid mapper process and be blown voltage stabilizing process control operation, it is characterised in that：
The process of diffusing is：First open little diffusing（9）, in diffuse（8）By coal powder injection tank（2）Pressure inside the tank unload to 0.25 Mpa ~
0.30Mpa, then open and diffuse greatly（7）Pressure is all drawn off；
The process of coalingging is：First open coal feeding valve（5）, lower coal valve is opened after 7s ~ 10s（4）And nitrogen purge valve（32）, coal powder injection
Tank（2）After dress 15t ~ 20t coal dusts, lower coal valve is first closed（4）And nitrogen purge valve（32）, coal feeding valve is closed after 23s ~ 30s（5）,
Ensure that coal dust does not remain in communicating pipe（3）It is interior, afterwards, close big diffusion valve（7）Diffuse with（8）；
The pressurising fluid mapper process is：Close and give coal valve（22）, open the valve that produces coal（21）, nitrogen back-flushing valve（32）, upper tapering stream
Change valve（16）, hypocone fluidisation valve（29）With bottom fluidization valve（17）Pressurising fluidisation is carried out, nitrogen flow is adjusted, Q is madeOn：QUnder：
QBottom：QInstead=5:5:6:6；
QOnNitrogen flow in-upper tapering fluidisation pipe；
QUnderNitrogen flow in-hypocone fluidisation pipe；
QBottomNitrogen flow in-bottom fluidization pipe；
QInsteadNitrogen flow in-nitrogen anti-blowpipe；
It is described injection voltage stabilizing process be：Opening is produced coal valve（21）, give coal valve（22）, upper tapering fluidize valve（16）, hypocone fluidisation
Valve（29）, bottom fluidization valve（17）With nitrogen back-flushing valve（35）, close and diffuse greatly（7）Diffuse with（8）, it is little to diffuse（9）With it is steady
Pressure fluidisation valve（30）Automatically adjusted according to the difference of actual tank pressure and setting tank pressure.
5. coal powder injection method as claimed in claim 4, it is characterised in that：It is little in the injection voltage stabilizing process to diffuse（9）With
Voltage stabilizing fluidizes valve（30）According to actual tank pressure and set tank pressure difference automatically adjust mode as：When actual tank pressure is higher than setting tank
It is little to diffuse during pressure 0.06Mpa ~ 0.08Mpa（9）Open, it is little to diffuse when both are equal（9）Close；Set when actual tank pressure is less than
When determining tank pressure 0.06Mpa ~ 0.08Mpa, voltage stabilizing fluidisation valve（30）Open, when both are equal, voltage stabilizing fluidisation valve（30）Close.
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| CN201510488469.9A CN105177201B (en) | 2015-08-11 | 2015-08-11 | Improved blast furnace coal injection tank and injection method |
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| CN201510488469.9A CN105177201B (en) | 2015-08-11 | 2015-08-11 | Improved blast furnace coal injection tank and injection method |
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| CN105177201B true CN105177201B (en) | 2017-04-12 |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105586449A (en) * | 2016-03-11 | 2016-05-18 | 山东钢铁股份有限公司 | Pulverized coal fluidizing and injection device for blast furnace |
| CN107164591A (en) * | 2017-07-10 | 2017-09-15 | 中冶华天工程技术有限公司 | Nitrogen multiplex system and its method that a kind of tank of pulverized coal injection three is blown side by side |
| CN110791602A (en) * | 2019-10-25 | 2020-02-14 | 邯郸钢铁集团有限责任公司 | Improved blast furnace coal injection system |
| CN114891935A (en) * | 2022-04-20 | 2022-08-12 | 青岛恒拓环保科技有限公司 | Automatic purging device and method for blast furnace coal injection main pipe |
| CN115094170A (en) * | 2022-06-10 | 2022-09-23 | 青岛恒拓环保科技有限公司 | Control method of fluidized gas of blast furnace coal injection tank |
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| Title |
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| 炼铁厂煤粉流化直喷实践;沈洪波;《柳钢科技》;20001231(第3期);第8-9页 * |
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| Publication number | Publication date |
|---|---|
| CN105177201A (en) | 2015-12-23 |
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