CN107164591A - Nitrogen multiplex system and its method that a kind of tank of pulverized coal injection three is blown side by side - Google Patents
Nitrogen multiplex system and its method that a kind of tank of pulverized coal injection three is blown side by side Download PDFInfo
- Publication number
- CN107164591A CN107164591A CN201710556052.0A CN201710556052A CN107164591A CN 107164591 A CN107164591 A CN 107164591A CN 201710556052 A CN201710556052 A CN 201710556052A CN 107164591 A CN107164591 A CN 107164591A
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- Prior art keywords
- tank
- injection
- valve
- nitrogen
- blown
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Links
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 title claims abstract description 114
- 238000002347 injection Methods 0.000 title claims abstract description 92
- 239000007924 injection Substances 0.000 title claims abstract description 92
- 229910052757 nitrogen Inorganic materials 0.000 title claims abstract description 57
- 239000003245 coal Substances 0.000 title claims abstract description 28
- 238000000034 method Methods 0.000 title claims abstract description 21
- 238000007664 blowing Methods 0.000 claims abstract description 11
- 239000007921 spray Substances 0.000 claims description 9
- 238000009792 diffusion process Methods 0.000 claims description 7
- 239000000428 dust Substances 0.000 claims description 7
- 238000005243 fluidization Methods 0.000 claims description 7
- 239000000843 powder Substances 0.000 claims description 6
- 230000000712 assembly Effects 0.000 claims description 5
- 238000000429 assembly Methods 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 abstract description 4
- 230000009466 transformation Effects 0.000 abstract description 4
- 238000010276 construction Methods 0.000 abstract description 3
- 238000005516 engineering process Methods 0.000 abstract description 3
- 238000004134 energy conservation Methods 0.000 abstract description 2
- 229910052742 iron Inorganic materials 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 4
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000005453 pelletization Methods 0.000 description 2
- 238000013022 venting Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000002802 bituminous coal Substances 0.000 description 1
- 239000002817 coal dust Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000014075 nitrogen utilization Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/001—Injecting additional fuel or reducing agents
- C21B5/003—Injection of pulverulent coal
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
- C21B7/002—Evacuating and treating of exhaust gases
Landscapes
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Manufacture Of Iron (AREA)
Abstract
The invention discloses the nitrogen multiplex system that a kind of tank of pulverized coal injection three is blown side by side, feature is by being connected after pipeline parallel connection with diffuse channel by the relief valve of three injection tanks in the system, three equalizer valves after pipeline parallel connection with total pressurising pipe by being connected, three blowing valves set non-return valve by being connected after pipeline parallel connection with injection pipeline between diffuse channel and total pressurising pipe.The invention also discloses the nitrogen multiplexing method that a kind of tank of pulverized coal injection three is blown side by side.Nitrogen multiplex system of the present invention, simple in construction, connection and reasonable arrangement, it is easy to installed in newly-built and transformation project；Nitrogen multiplexing method of the present invention, technological process is succinctly reliable, and nitrogen reusability is high；Newly-built with using this technology in transformation project, the discharge with dirt nitrogen can be not only reduced, the utilization ratio of nitrogen is improved, and the cost of investment and operating cost of follow-up cleaner can be reduced, be conducive to the energy-conservation of iron industry, consumption reduction, synergy, be worthy of popularization.
Description
Technical field
The nitrogen multiplex system and its method being blown side by side the present invention relates to a kind of tank of pulverized coal injection three.
Background technology
In big-and-middle-sized blast fumance, to ensure the continuous, stably of coal injection system, generally sprayed using three tank block forms
Replacement two tanks injection is blown, is ensured with this under injection tank appearance and size limited situation, still there is the rational tank switching cycle, with
Ensure sufficient equipment on-line maintenance time.Nitrogen is as one of important medium of blast furnace blowing bituminous coal or Mixture Density Networks, in injection
During, a part of nitrogen enters blast furnace along with coal dust, is finally discharged into gaspipe network from furnace roof, and most nitrogen exist
Injection is discharged into air after terminating by diffusion valve, dust-removal cloth-bag, and energy waste is more obvious.At the same time, in blast furnace ironmaking work
Nitrogen use level constantly rises in skill, and steel plant's nitrogen medium equilibrium process is very difficult, and many factories are the enough nitrogen of acquisition
Gas is had to extra newly added equipment.Therefore, the recycling to nitrogen-blow is very key.
The content of the invention
The technical problem to be solved in the present invention is：There is provided a kind of nitrogen multiplex system that tank of pulverized coal injection three is blown side by side and
Its multiplexing method, with solve the tank of pulverized coal injection three side by side injection in nitrogen utilization rate it is low, band dirt nitrogen discharge amount it is big the problem of.
The technical scheme that the present invention solves technical problem is as follows：
The nitrogen multiplex system that a kind of tank of pulverized coal injection three of the present invention is blown side by side, is characterized in：Including Pulverized Coal Bin, diffuse
Pipeline, injection tank, total pressurising pipe, non-return valve, injection pipeline and blast-furnace tuyere；The injection tank is three, this three injection tanks
On be equipped with equalizer valve, relief valve, valve of coalingging, pressure-supplementing valve, cone fluidisation valve, blowing valve and underflow valve；The Pulverized Coal Bin point
Valve of coalingging not with three injection tanks is connected；The relief valve of three injection tanks by pipeline it is in parallel after with diffuse channel phase
Connection；The equalizer valve of three injection tanks after pipeline parallel connection with total pressurising pipe by being connected；The spray of three injection tanks
Valve is blown by being connected after pipeline parallel connection with injection pipeline；The end of the injection pipeline is connected with blast-furnace tuyere；It is described to put
Non-return valve is provided between separate tube road and total pressurising pipe；Diffusion valve is provided with the diffuse channel；On total pressurised pipeline
It is provided with total equalizer valve.
Further, it is connected with cleaner on the diffuse channel.
Further, the cleaner is sack cleaner.
Further, distributor, several spray gun assemblies are disposed with the injection pipeline；The spray gun assembly one
End is connected with distributor, and its other end is connected with blast-furnace tuyere.
Further, the distributor is several.
Another technical scheme for solving technical problem of the present invention is as follows：
The nitrogen multiplexing method that a kind of tank of pulverized coal injection three of the present invention is blown side by side, it is characterised in that：Utilize said system
Carry out, three injection tanks are entered into luggage powder and pressurising is carried out to two of which injection tank, the injection tank of another non-pressurising is made
To treat pressurized can；As treating pressure release tank after one in injection tank after two pressurisings is blown, after another pressurising
Injection tank is used as tank to be blown；Then treat injection tank to be blown, while treating pressure release tank and treating that pressurized can is let out respectively
Pressure and pressurising, this is changed into treating pressure release tank after injection tank has been blown, and the pressure release and pressurising that carry out simultaneously are divided to process to be two ranks
Section：
First stage：Close the blowing valve treated on pressure release tank, cone fluidisation valve and underflow valve and open its relief valve, close
Close and treat that coalingging for pressurized can and opens equalizer valve thereon at valve, let out using the remaining nitrogen treated in pressure release tank to treating that pressurized can carries out
Preacceleration inflation；
Second stage：Treated when whne pressure release tank with when pressurized can internal pressure is close or when equal, opening total equalizer valve
Pressurized can continues to be pressurized to satisfaction injection and required, what now this charged pressure treats that pressurized can is changed into tank to be blown；At the same time, open
The remaining low-pressure nitrogen that diffusion valve treats in pressure release tank is diffused and reaches pressure release requirement, and what now this had let out pressure treats pressure release tank
It is changed into treating pressurized can, pressurized can, which enters luggage powder, then is treated to this；
Then to new tank to be blown, treat pressure release tank and treat that pressurized can circulation carries out above-mentioned tank be blown injection while
Treat pressure release tank and treat that pressurized can carries out the process of pressure release and pressurising respectively.
Further, pressure release tank is treated in the second stage and treat the difference of pressurized can internal pressure for 0.05MPa~
0.15MPa。
Further, when the remaining low-pressure nitrogen in pressure release tank is treated in the second stage being diffused, by the low pressure
Nitrogen removing dust cloth bag is diffused.
Nitrogen multiplex system of the present invention, its is simple in construction, connection and reasonable arrangement, it is easy to enter in newly-built and transformation project
Row is installed；Nitrogen multiplexing method of the present invention, its technological process is succinctly reliable, nitrogen reusability height (more than 40%)；New
Build and this technology is used in transformation project, can not only reduce the discharge with dirt nitrogen, improve the utilization ratio of nitrogen, Er Qieneng
The cost of investment and operating cost of follow-up cleaner are enough reduced, is conducive to the energy-conservation of iron industry, consumption reduction, synergy, is worth pushing away
Wide application.
Brief description of the drawings
Fig. 1 is the nitrogen multiplex system structural representation that the tank of pulverized coal injection three of the present invention is blown side by side.
Fig. 2 is that pressure release tank is treated described in embodiment 2 and treats that pressurized can carries out the logic control block diagram of pressure release and pressurising respectively；
In figure：1. Pulverized Coal Bin, 2. diffusion valves, 3. total equalizer valves, 4. equalizer valves, 5. relief valves, 6. coaling valve, 7. ftercompctions
Valve, 8. injection tanks, 9. cones fluidisation valve, 10. blowing valves, 11. underflow valves, 12 distributors, 13 spray gun assemblies, 14. non-return valves,
15. blast-furnace tuyere, 16. diffuse channels, 17. total pressurising pipes, 18. injection pipelines, 19. cleaners.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out clear, complete
Site preparation is described, it is clear that described embodiment is only a part of embodiment of the invention, rather than whole embodiments.It is based on
Embodiment in the present invention, it is every other that those of ordinary skill in the art are obtained under the premise of creative work is not made
Embodiment, belongs to the scope of protection of the invention.
Embodiment 1：
As shown in figure 1, the nitrogen multiplex system that a kind of tank of pulverized coal injection three is blown side by side, is characterized in：Including Pulverized Coal Bin
1st, diffuse channel 16, injection tank 8, total pressurising pipe 17, non-return valve 14, injection pipeline 18 and blast-furnace tuyere 15；It is described injection tank 8 be
Three, this three injection tanks 8 on be equipped with equalizer valve 4, relief valve 5, valve 6 of coalingging, pressure-supplementing valve 7, cone fluidisation valve 9, blowing valve
10 and underflow valve 11；Coaling valve 6 of the Pulverized Coal Bin 1 respectively with three injection tanks 8 is connected；Three injection tanks 8
Relief valve 5 after pipeline parallel connection with diffuse channel 16 by being connected；The equalizer valve 4 of three injection tanks 8 is in parallel by pipeline
It is connected afterwards with total pressurising pipe 17；The blowing valve 10 of three injection tanks 8 after pipeline parallel connection with injection pipeline 18 by being connected
It is logical；The end of the injection pipeline 18 is connected with blast-furnace tuyere 15；Set between the diffuse channel 16 and total pressurising pipe 17
There is non-return valve 14；Diffusion valve 2 is provided with the diffuse channel 16；Total equalizer valve 3 is provided with total pressurised pipeline 17.This
Non-return valve 14 is set, it can be ensured that while pressure release nitrogen is multiplexed, the nitrogen in total pressurised pipeline 17 will not pass through in embodiment
Diffuse channel 16 is scurried out, and causes the waste of nitrogen.
Cleaner 19 is connected with diffuse channel 16 described in the present embodiment, the cleaner 19 can be bag-type dust
Device.Set cleaner 19 that diffused gas can be caused directly not discharge, it is to avoid the generation of pollution, the cleaner 19 is preferred
Sack cleaner, can effectively remove the harmful substances such as dust in diffused gas.
It is blown described in the present embodiment on pipeline 18 and is disposed with distributor 12, several spray gun assemblies 13；The spray
The one end of rifle component 13 is connected with distributor 12, and its other end is connected with blast-furnace tuyere 15；
Distributor 12 described in the present embodiment can be several.Distributor 12 is set to several, can be according to nitrogen
It is connected the need for gas multiplex system with multiple spray gun assemblies 13, to meet the requirement of nitrogen multiplexing.
Embodiment 2：
As shown in Fig. 2 the nitrogen multiplexing method that a kind of tank of pulverized coal injection three is blown side by side, is characterized in：Utilize embodiment 1
Described in system carry out, by three injection tanks enter luggage powder and to two of which injection tank carry out pressurising, another non-pressurising
Injection tank as treating pressurized can；It is another as pressure release tank is treated after one in injection tank after two pressurisings is blown
Injection tank after individual pressurising is used as tank to be blown；Then treat injection tank to be blown, while treating pressure release tank and treating pressurized can
Pressure release and pressurising are carried out respectively, and this is changed into treating pressure release tank after injection tank has been blown, and the pressure release and pressurising that carry out simultaneously divided
Journey is two stages：
First stage：Close the blowing valve treated on pressure release tank, cone fluidisation valve and underflow valve and open its relief valve, close
Close and treat that coalingging for pressurized can and opens equalizer valve thereon at valve, let out using the remaining nitrogen treated in pressure release tank to treating that pressurized can carries out
Preacceleration inflation；
Second stage：Treated when whne pressure release tank with when pressurized can internal pressure is close or when equal, opening total equalizer valve
Pressurized can continues to be pressurized to satisfaction injection and required, what now this charged pressure treats that pressurized can is changed into tank to be blown；At the same time, open
The remaining low-pressure nitrogen that diffusion valve treats in pressure release tank is diffused and reaches pressure release requirement, and what now this had let out pressure treats pressure release tank
It is changed into treating pressurized can, pressurized can, which enters luggage powder, then is treated to this；
Then to new tank to be blown, treat pressure release tank and treat that pressurized can circulation carries out above-mentioned tank be blown injection while
Treat pressure release tank and treat that pressurized can carries out the process of pressure release and pressurising respectively." new tank to be blown, treating pressure release tank and waiting to fill here
Pressure tank " refers to by the injection tank for being respectively in different conditions changes.
Pressure release tank is treated described in the present embodiment in second stage and treat the difference of pressurized can internal pressure for 0.05MPa~
0.15MPa.The pressure difference value can be set according to the maximum allowable venting duration of single injection tank, when injection tank group tank switching week
Phase is big, and low value is can use when venting duration is abundant, and the utilization rate of nitrogen can be now improved to greatest extent, reduces band dirt nitrogen discharge
Amount；Conversely, then taking high level.
When treating the remaining low-pressure nitrogen in pressure release tank described in the present embodiment in second stage and being diffused, by the low pressure
Nitrogen removing dust cloth bag is diffused.
The high-pressure section nitrogen reuse in tank pressure leak process is blown in the present embodiment, remaining nitrogen pressure is low, tolerance
It is few, small is impacted to dust pelletizing system in follow-up diffuse, it is possible to increase dust pelletizing system operational efficiency and service life, reduction are run into
This, can also reduce the initial outlay cost of cleaner for new construction.
Although an embodiment of the present invention has been shown and described, for the ordinary skill in the art, can be with
A variety of changes, modification can be carried out to these embodiments, replace without departing from the principles and spirit of the present invention by understanding
And modification, the scope of the present invention is defined by the appended.
Claims (8)
1. the nitrogen multiplex system that a kind of tank of pulverized coal injection three is blown side by side, it is characterised in that：Including Pulverized Coal Bin (1), exhaust stack
Road (16), injection tank (8), total pressurising pipe (17), non-return valve (14), injection pipeline (18) and blast-furnace tuyere (15)；The injection
Tank (8) is three, and equalizer valve (4), relief valve (5), valve of coalingging (6), pressure-supplementing valve (7), cone are equipped with this three injection tanks (8)
Body fluidisation valve (9), blowing valve (10) and underflow valve (11)；The valve of coalingging of the Pulverized Coal Bin (1) respectively with three injection tanks (8)
(6) it is connected；The relief valve (5) of three injection tanks (8) after pipeline parallel connection with diffuse channel (16) by being connected；Three
The equalizer valve (4) of the injection tank (8) after pipeline parallel connection with total pressurising pipe (17) by being connected；Three injection tanks (8)
Blowing valve (10) by pipeline it is in parallel after be connected with injection pipeline (18)；The end of the injection pipeline (18) and blast furnace wind
Mouth (15) is connected；Non-return valve (14) is provided between the diffuse channel (16) and total pressurising pipe (17)；The diffuse channel
(16) diffusion valve (2) is provided with；Total equalizer valve (3) is provided with total pressurised pipeline (17).
2. the nitrogen multiplex system that a kind of tank of pulverized coal injection three is blown side by side according to claim 1, it is characterised in that：It is described
Cleaner (19) is connected with diffuse channel (16).
3. the nitrogen multiplex system that a kind of tank of pulverized coal injection three is blown side by side according to claim 2, it is characterised in that：It is described
Cleaner (19) is sack cleaner.
4. the nitrogen multiplex system that a kind of tank of pulverized coal injection three is blown side by side according to claim 1, it is characterised in that：It is described
Distributor (12), several spray gun assemblies (13) are disposed with injection pipeline (18)；Described spray gun assembly (13) one end with
Distributor (12) is connected, and its other end is connected with blast-furnace tuyere (15).
5. the nitrogen multiplex system that a kind of tank of pulverized coal injection three is blown side by side according to claim 4, it is characterised in that：It is described
Distributor (12) is several.
6. the nitrogen multiplexing method that a kind of tank of pulverized coal injection three is blown side by side, it is characterised in that：Utilize system described in claim 1
Carry out, three injection tanks are entered into luggage powder and pressurising is carried out to two of which injection tank, the injection tank of another non-pressurising is made
To treat pressurized can；As treating pressure release tank after one in injection tank after two pressurisings is blown, after another pressurising
Injection tank is used as tank to be blown；Then treat injection tank to be blown, while treating pressure release tank and treating that pressurized can is let out respectively
Pressure and pressurising, this is changed into treating pressure release tank after injection tank has been blown, and the pressure release and pressurising that carry out simultaneously are divided to process to be two ranks
Section：
First stage：Close the blowing valve treated on pressure release tank, cone fluidisation valve and underflow valve and open its relief valve, closing is treated
Coalingging for pressurized can and opens equalizer valve thereon at valve, is let out using the remaining nitrogen treated in pressure release tank to treating that pressurized can carries out preliminary filling
Pressure；
Second stage：When treating pressurising with when pressurized can internal pressure is close or when equal, opening total equalizer valve whne pressure release tank
Tank continues to be pressurized to satisfaction injection and required, what now this charged pressure treats that pressurized can is changed into tank to be blown；At the same time, unlatching is diffused
The remaining low-pressure nitrogen that valve treats in pressure release tank is diffused and reaches pressure release requirement, and what now this had let out pressure treats that pressure release tank is changed into
Pressurized can is treated, pressurized can, which enters luggage powder, then to be treated to this；
Then to new tank to be blown, treat pressure release tank and wait to let out while treat that pressurized can circulation carries out above-mentioned tank be blown injection
Press tank and treat that pressurized can carries out the process of pressure release and pressurising respectively.
7. the nitrogen multiplexing method that a kind of tank of pulverized coal injection three is blown side by side according to claim 6, it is characterised in that：It is described
Pressure release tank is treated in second stage and treats the difference of pressurized can internal pressure for 0.05MPa~0.15MPa.
8. the nitrogen multiplexing method that a kind of tank of pulverized coal injection three is blown side by side according to claim 6, it is characterised in that：It is described
When the remaining low-pressure nitrogen in pressure release tank is treated in second stage being diffused, the low-pressure nitrogen removing dust cloth bag is put
Dissipate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710556052.0A CN107164591A (en) | 2017-07-10 | 2017-07-10 | Nitrogen multiplex system and its method that a kind of tank of pulverized coal injection three is blown side by side |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710556052.0A CN107164591A (en) | 2017-07-10 | 2017-07-10 | Nitrogen multiplex system and its method that a kind of tank of pulverized coal injection three is blown side by side |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107164591A true CN107164591A (en) | 2017-09-15 |
Family
ID=59823378
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710556052.0A Pending CN107164591A (en) | 2017-07-10 | 2017-07-10 | Nitrogen multiplex system and its method that a kind of tank of pulverized coal injection three is blown side by side |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107164591A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107652990A (en) * | 2017-10-24 | 2018-02-02 | 北京神雾电力科技有限公司 | A kind of pyrolysis oven feed system |
| 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 |
| CN115232898A (en) * | 2022-07-27 | 2022-10-25 | 重庆钢铁股份有限公司 | Blast furnace coal injection system and injection tank pressure equalizing and nitrogen recovery method thereof |
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| CN203393169U (en) * | 2013-07-09 | 2014-01-15 | 林俊贤 | Nitrogen recovery device of blast furnace coal injection system |
| JP2015117385A (en) * | 2013-12-16 | 2015-06-25 | 新日鉄住金エンジニアリング株式会社 | Negative pressure circulation type pulverized coal-blowing facility, and cooling, purge and leakage check methods |
| CN105177201A (en) * | 2015-08-11 | 2015-12-23 | 邯钢集团邯宝钢铁有限公司 | Improved blast furnace coal injection tank and injection method |
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| CN201367434Y (en) * | 2009-03-16 | 2009-12-23 | 石如松 | Coal injection and nitrogen conservation device for blast furnaces |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| 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 |
| CN115232898A (en) * | 2022-07-27 | 2022-10-25 | 重庆钢铁股份有限公司 | Blast furnace coal injection system and injection tank pressure equalizing and nitrogen recovery method thereof |
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Application publication date: 20170915 |
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