CN102154532A - Long-distance coal injection system - Google Patents
Long-distance coal injection system Download PDFInfo
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- CN102154532A CN102154532A CN 201110138173 CN201110138173A CN102154532A CN 102154532 A CN102154532 A CN 102154532A CN 201110138173 CN201110138173 CN 201110138173 CN 201110138173 A CN201110138173 A CN 201110138173A CN 102154532 A CN102154532 A CN 102154532A
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- coal
- injection
- buffer tank
- injection system
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Abstract
The invention discloses a long-distance coal injection system which comprises an air supply device (2) connected with an injection tank (1), and has the key points that a buffer tank (4) provided with a pressure control valve (5) is also connected behind the air supply device (2); the buffer tank (4) is connected with a vertical raising pipe (8) by an inclined descent pipe (6); and an outlet of the vertical raising pipe (8) is connected with a blast-furnace tuyere (11) by a coal injection branch pipe (10). The vertical raising pipe (8) is provided with a gas nozzle (7), and compressed air or compressed inert gas is adopted for injection. As the buffer tank is arranged, the fluctuation of pulverized coal flow can be eliminated by the buffer tank after pulverized coal is conveyed into the buffer tank through the injection tank from a long distance, the requirement of a blast furnace for the uniformity of coal injection can be met, and the long-distance even injection of the blast furnace coal injection can be realized.
Description
Technical field
The present invention relates to a kind of system by pipeline strength delivery of bulk material.
Background technology
Furnace coal spraying technology is widely used in China, and through the development of decades, blast furnace PCI technology of China and technology have developed into higher level, popularity and on average coal than aspect all make much progress.With the Baosteel blast furnace is representative, and increasing blast furnace is steady in a long-term to be moved on high-coal ratio.According to national industry technology requirement, blast furnace newly-built or that transform must be provided with coal injection system.
Adopt of at present domestic newly-built Steel Plant concentrates powder process to concentrate the technology of winding-up more, directly jetted to many blast furnaces simultaneously by a powder process injecting station.Owing to reasons such as total figure layout or newly-built blast furnace projects, often exist the powder process injecting station apart from certain situation that blast furnace is far away, under the prerequisite that reduces to invest, must carry out remote breeze blowing., directly jet through behind the making-up air device from the winding-up jar coal dust that comes out, but after the increase of winding-up distance, occur problems such as winding-up pulsation and line clogging easily, cause blast furnace temperature to fluctuate, influence conditions of blast furnace and molten steel quality to blast furnace.Therefore, remote breeze blowing and blast furnace are resolved to having contradiction between the inhomogeneity requirement of coal powder injection, pressing for.
Summary of the invention
The objective of the invention is to propose the uniformly remote coal injection system of a kind of coal powder injection.
The objective of the invention is to be achieved through the following technical solutions: a kind of remote coal injection system, comprise the making-up air device that links to each other with the winding-up jar, it is characterized in that: described making-up air device back also is connected with the surge tank that has pressure control valve, surge tank is connected to the vertical-lifting pipe by the inclination downtake, and the outlet of vertical-lifting pipe links to each other with blast-furnace tuyere by coal jetting branch.
Described coal powder injection is responsible for and is adopted the concentrated phase conveying technology.
Described vertical-lifting pipe bottom has gas spout, adopts pressurized air or compressed inert to jet.
As further optimization, for convenience coal dust is delivered to a plurality of blast-furnace tuyeres, described vertical-lifting pipe outlet is connected with divider, and coal dust enters in the coal jetting branch after the divider ejection.
Compared with prior art, beneficial effect of the present invention is:
(1) by surge tank is set, coal dust is after the winding-up jar is delivered to surge tank at a distance, and surge tank is eliminated the fluctuation of pulverized coal flow, satisfies the uniformity requirement of blast furnace to coal powder injection, realizes evenly jetting at a distance of pulverized coal injection.
(2) native system can be realized remote high-density coal injection, effectively reduces pipe wear and gas consumption, reduces cold air and enters the influence of blast-furnace tuyere to blast furnace.
Description of drawings
Fig. 1 is a structural representation of the present invention.
1-jets jar; The 2-making-up air device; The 3-coal powder injection is responsible for; The 4-surge tank; The 5-pressure control valve; 6-inclination downtake; The 7-gas spout; 8-vertical-lifting pipe; The 9-divider; The 10-coal jetting branch; The 11-blast-furnace tuyere.
Embodiment
Below in conjunction with drawings and the specific embodiments the present invention is further described.
As shown in Figure 1, a kind of remote coal injection system, delivering gas adopts pressurized air.The sending end of system is winding-up jar 1, winding-up jar outlet quality of pc flow rate 40 t/h, solid-gas ratio 100:1, through behind the making-up air device 2, solid-gas ratio is reduced to 40:1, be responsible for 3 through coal dust then coal dust is delivered to surge tank 4, coal dust is responsible for and is adopted the close conveying mutually of two sleeve pipe turbulent flow types, and length is 1000 m, and coal dust separates in surge tank 4 with air, air diffuses through pressure control valve 5, and coal dust is deposited to surge tank 4 bottoms.
Coal dust in the surge tank 4 flows in the vertical-lifting pipe 8 through inclination downtake 6, under the effect of air jet 7, coal dust begins upwards to carry in the vertical-lifting pipe 8 of high 5 m, and form the pulverized coal flow of the nucleolus structure circumferentially be evenly distributed, enter in the disc type pulverized coal distributor 9, the distributed uniform degree is in 5%, and coal dust sprays into blast-furnace tuyere 11 through coal jetting branch 10 afterwards.At chemical field, riser tube is a mature technology, and experiment shows that coal stream forms the nucleolus structure in riser tube, and coal dust circumferentially is evenly distributed along riser tube, helps the uniformly distributing of coal dust in divider.
In the present embodiment, the air that together sprays into blast-furnace tuyere with coal dust only has the pressurized air nozzle-end of vertical-lifting pipe, the carrier gas part that coal dust is delivered to surge tank realizes separating at surge tank, and the freezing air amount of therefore going into stove is few, helps coal dust and fully burns at blast-furnace tuyere.If the delivering gas that coal powder injection is responsible in 3 adopts nitrogen, also recyclable utilization after surge tank separates.
The present invention separately solves remote and this a pair of contradiction of homogeneity, and responsible remote the conveying is responsible in coal powder injection, need not to consider the homogeneity of pulverized coal flow, can utilize sophisticated remote concentrated phase Pneumatic Conveying Technology; Surge tank to the vertical-lifting pipe between the divider is responsible for evenly carrying, and can utilize the sophisticated riser tube technology of chemical field.Remote directly winding-up obtains separating solution with contradiction between the coal powder injection homogeneity by snubber, and utilizes the mature technology in other field, has very strong feasibility.
Claims (3)
1. remote coal injection system, comprise the making-up air device (2) that links to each other with winding-up jar (1), it is characterized in that: described making-up air device (2) back also is connected with the surge tank (4) that has pressure control valve (5), surge tank (4) is connected to vertical-lifting pipe (8) by inclination downtake (6), and vertical-lifting pipe (8) outlet links to each other with blast-furnace tuyere (11) by coal jetting branch (10).
2. remote coal injection system as claimed in claim 1 is characterized in that: described vertical-lifting pipe (8) has gas spout (7), adopts pressurized air or compressed inert to jet.
3. remote coal injection system as claimed in claim 1 or 2 is characterized in that: the outlet of described vertical-lifting pipe (8) is connected with divider (9), and coal dust enters in the coal jetting branch (10) after divider (9) ejection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101381736A CN102154532B (en) | 2011-05-26 | 2011-05-26 | Long-distance coal injection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101381736A CN102154532B (en) | 2011-05-26 | 2011-05-26 | Long-distance coal injection system |
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| Publication Number | Publication Date |
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| CN102154532A true CN102154532A (en) | 2011-08-17 |
| CN102154532B CN102154532B (en) | 2012-07-25 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011101381736A Active CN102154532B (en) | 2011-05-26 | 2011-05-26 | Long-distance coal injection system |
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| CN (1) | CN102154532B (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787191A (en) * | 2012-08-21 | 2012-11-21 | 中冶南方工程技术有限公司 | System and process for pulverized coal injection of blast furnace |
| CN105253631A (en) * | 2015-11-18 | 2016-01-20 | 神华集团有限责任公司 | Powder pressurized conveying device |
| CN115369197A (en) * | 2022-08-19 | 2022-11-22 | 重庆钢铁股份有限公司 | Method for long-distance conveying of pulverized coal by blast furnace and coal injection system of blast furnace |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1081908A (en) * | 1996-09-03 | 1998-03-31 | Nippon Steel Corp | Method for blowing pulverized coal |
| CN101289696A (en) * | 2008-03-12 | 2008-10-22 | 重庆钢铁(集团)有限责任公司 | Very long distance concentrated phase conveying process for coal fines |
| CN101886151A (en) * | 2009-05-12 | 2010-11-17 | 高雪生 | High-efficiency and concentrated-phase pulverized coal injection method |
-
2011
- 2011-05-26 CN CN2011101381736A patent/CN102154532B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1081908A (en) * | 1996-09-03 | 1998-03-31 | Nippon Steel Corp | Method for blowing pulverized coal |
| CN101289696A (en) * | 2008-03-12 | 2008-10-22 | 重庆钢铁(集团)有限责任公司 | Very long distance concentrated phase conveying process for coal fines |
| CN101886151A (en) * | 2009-05-12 | 2010-11-17 | 高雪生 | High-efficiency and concentrated-phase pulverized coal injection method |
Non-Patent Citations (2)
| Title |
|---|
| 《山东冶金》 20080229 高雪生等 长钢高炉喷煤系统设计及生产实践 第23-25页 1-3 第30卷, 第1期 * |
| 《现代冶金》 20091231 张桂华等 新抚钢炼铁厂远距离喷煤系统的设计 第30-32页 1-3 第37卷, 第6期 * |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102787191A (en) * | 2012-08-21 | 2012-11-21 | 中冶南方工程技术有限公司 | System and process for pulverized coal injection of blast furnace |
| CN102787191B (en) * | 2012-08-21 | 2014-06-25 | 中冶南方工程技术有限公司 | System and process for pulverized coal injection of blast furnace |
| CN105253631A (en) * | 2015-11-18 | 2016-01-20 | 神华集团有限责任公司 | Powder pressurized conveying device |
| CN115369197A (en) * | 2022-08-19 | 2022-11-22 | 重庆钢铁股份有限公司 | Method for long-distance conveying of pulverized coal by blast furnace and coal injection system of blast furnace |
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| Publication number | Publication date |
|---|---|
| CN102154532B (en) | 2012-07-25 |
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