CN107130071A - A kind of coal rifle - Google Patents
A kind of coal rifle Download PDFInfo
- Publication number
- CN107130071A CN107130071A CN201710335402.0A CN201710335402A CN107130071A CN 107130071 A CN107130071 A CN 107130071A CN 201710335402 A CN201710335402 A CN 201710335402A CN 107130071 A CN107130071 A CN 107130071A
- Authority
- CN
- China
- Prior art keywords
- coal
- cermet
- nozzle
- rifle
- coal rifle
- 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.)
- Granted
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Classifications
-
- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B7/00—Blast furnaces
Abstract
The present invention provides a kind of coal rifle, including gun barrel and pipette tips, the pipette tips include cermet nozzle and outer wall of steel pipe, and cermet nozzle is fixed on inside outer wall of steel pipe, cermet nozzle interior is provided with emanator, and the emanator is cermet matter sheet cell structure.During using coal rifle coal powder injection of the present invention, coal dust sprays after being broken up by emanator, forms divergent shape cloud cluster, coal dust group density before coal rifle is diminished, oxygen concentration accordingly increases；Using cermet nozzle and cermet matter emanator, coal rifle anti-wear performance can be effectively improved, the abrasion of coal rifle is reduced, there being in outer wall of steel pipe protection, collision cermet nozzle when coal rifle is shaken is unlikely to deform fragmentation.Compared with prior art, the present invention can improve coal combustion rate, increase coal rifle service life.
Description
Technical field
The present invention relates to the coal injection system of blast furnace ironmaking, more particularly to a kind of coal rifle.
Background technology
In the ironmaking production of modern blast furnace, most directly energy-saving means are exactly come burnt instead of burning with coal injection
Charcoal, improves the research emphasis that coal ejection ratio is always ironmaking worker.Research shows that the principal element for determining Coal Injection Amount into BF is wind
Whether the combustion rate and the gas permeability of blast furnace stock column of coal dust before mouthful, coal dust can fully burn depending on coal dust and oxygen in penetrating stove
Mixability, both mix it is better, coal dust firing it is more abundant.
Existing blast furnace is generally straight-through circular wear-resistant steel pipe structure with coal rifle, and the coal dust of ejection is into bulk, with coal ejection ratio
Raising, the density that coal dust is rolled into a ball before coal rifle becomes big, and oxygen concentration is accordingly reduced, and is degrading the burning condition of coal dust, coal combustion rate
Low, therefore, it is the important directions that research improves coal ejection ratio to change coal rifle structure and then improve coal combustion rate.It is open at present
Patent in it is mostly be that jet rose is processed into coal rifle front end or coal rifle front end is processed into spirality, improve true by this
It can play a part of further improving coal ejection ratio in fact, still, in actual applications, pulverized coal particle at improved coal rifle pipette tips
Frictional force becomes big, and wearability declines more again after pipette tips are heated, causes coal rifle serious wear service life to shorten, coal rifle is changed frequently
It is numerous.To overcome this defect, domestic and international researcher is generally integrally to change coal rifle pipette tips into ceramic material by the way of, so
Wearability is got a promotion, still, in actual production, and high speed coal dust makes coal rifle acutely shake, and pipette tips are frequently collided with tuyere small sleeve,
Yielding fragmentation, has a strong impact on service life in ceramic material collision process.
The content of the invention
Goal of the invention：To overcome the shortcoming of prior art, the present invention provides a kind of coal combustion rate, increase of improving and uses the longevity
The coal rifle of life.
Technical scheme：A kind of coal rifle of the present invention, including gun barrel (1) and pipette tips (2), it is characterised in that：The rifle
Head (2) includes cermet nozzle (3) and outer wall of steel pipe (4), and cermet nozzle (3) is fixed on outer wall of steel pipe (4) inside, gold
Belong to and emanator (5) is provided with inside ceramic nozzle (3), the emanator (5) is cermet matter laminated structure.
Further, the gun barrel (1) and pipette tips (2) are integrally formed.
Further, the cermet nozzle (3) is equal to or more than gun barrel (1) by the internal diameter of gun barrel (1) one end
Internal diameter.
Further, the cermet nozzle (3) is less than or equal to the interior of the other end by the internal diameter of gun barrel (1) one end
Footpath.
Further, the cermet nozzle (3) is to be connected by screw thread (7) with outer wall of steel pipe (4).
Further, emanator (5) the page distance between commutator segments is 2-6mm.
Further, the pipette tips (2) account for the 5-7% of gun barrel (1) length.
Wherein, the length of pipette tips (2) of the present invention is identical with emanator (5) length, can more preferable scattered pulverized coal, and by
In (5) that add emanator, the length of gun barrel shared by pipette tips is reduced, the time of coal dust ejection is reduced, production effect is improved
Rate.
Further, the angle between emanator (5) the cermet matter laminated structure and outer wall of steel pipe (4) is 30-
40°。
Wherein, it may be such that the coal dust ejection time-division dissipates equal between cermet matter laminated structure and outer wall of steel pipe for 30-40 °
It is even, further improve Combustion Efficiency of Coal Powder.
Beneficial effect：Coal dust sprays after being broken up by emanator, forms divergent shape cloud cluster, becomes coal dust group density before coal rifle
Small, oxygen concentration accordingly increases, so as to improve coal combustion rate.Using cermet nozzle and cermet matter emanator, energy
Coal rifle anti-wear performance is enough effectively improved, the abrasion of coal rifle is reduced, cermet nozzle has outer wall of steel pipe protection when coal rifle is shaken, collides
In be unlikely to deform fragmentation, be effectively increased the service life of coal rifle.
Brief description of the drawings
Fig. 1 is existing coal rifle pipette tips profile；
Fig. 2 is coal rifle pipette tips profile of the present invention；
Fig. 3 is coal rifle muzzle structural representation of the present invention；
Fig. 4 is coal rifle pipette tips nozzle arrangements schematic diagram of the present invention.
Embodiment
Reference picture 2, Fig. 3 and Fig. 4, coal rifle of the present invention, including gun barrel 1 and pipette tips 2, gun barrel 1 and pipette tips 2 are integrated
Molding structure；Pipette tips 2 include cermet nozzle 3 and outer wall of steel pipe 4, and cermet nozzle 3 passes through screw thread 7 and outer wall of steel pipe 4
Connection；Cermet nozzle 3 is tubular structure close to the one end of gun barrel 1, and its internal diameter is more than or equal to the internal diameter of steel pipe 1, close
One end of muzzle 6 is open horn-like structure, and internal diameter is more than or equal to the internal diameter of tubular structure one end；Pipette tips 2 account for gun barrel 1 and grown
The 5-7% of degree；The inside of cermet nozzle 3 is provided with emanator 5, and emanator 5 is cermet matter laminated structure, its blade be in
The one end open of muzzle 6 it is horn-like, blade pitgh can determine blade pitgh from for 2-6mm according to the species of coal injection
Size, the angle between blade and outer wall of steel pipe is 30-40 °.
During using coal rifle coal injection as shown in Figure 2, Figure 3 and Figure 4, coal dust sprays after being broken up by emanator 5, forms hair
Bulk cloud cluster, makes coal dust group density before coal rifle diminish, oxygen concentration accordingly increases, and it is more abundant that coal dust is mixed with oxygen, so as to improve
Coal combustion rate.Using cermet nozzle 3 and cermet matter emanator 5, coal rifle anti-wear performance can be effectively improved, is subtracted
Few coal rifle abrasion, cermet nozzle 3 has outer wall of steel pipe 4 to protect when coal rifle is shaken, and fragmentation is unlikely to deform in collision, is effectively increased
The service life of coal rifle.
Using coal rifle coal injection as shown in Figure 2, Figure 3 and Figure 4, the service life to coal rifle is detected.The coal rifle longevity
Ordering examination criteria is：Renewed by coal rifle and be defined, unit is day, the working of a furnace is good, coal powder injection is relatively stablized, and coal rifle injecting coal quantity is in 40 ton days.Knot
Fruit shows that coal rifle service life of the invention reaches 150-180 days, and the life-span of coal rifle improves, and greatly reduces production cost.
Using coal rifle coal injection as shown in Figure 2, Figure 3 and Figure 4, coal dust sprays after being broken up by emanator 5, counts coal dust
Combustion rate.Simulated test condition is：It is that First air flow velocity is 10m/s, Secondary Air flow velocity that pulverized-coal fired boiler, which imports and exports boundary condition,
For 180-250m/s, pulverized coal flow is 0.5kg/s.As a result show, use the coal rifle of the present invention so that the combustion rate of coal dust is improved
To 99.8%, the coking speed of boiler is greatly reduced.
Claims (8)
1. a kind of coal rifle, including gun barrel (1) and pipette tips (2), it is characterised in that：The pipette tips (2) include cermet nozzle (3)
With outer wall of steel pipe (4), cermet nozzle (3) is fixed on inside outer wall of steel pipe (4) inside, cermet nozzle (3) provided with hair
Device (5) is dissipated, the emanator (5) is cermet matter laminated structure.
2. coal rifle according to claim 1, it is characterised in that：The gun barrel (1) and pipette tips (2) are integrally formed.
3. coal rifle according to claim 1, it is characterised in that：The cermet nozzle (3) is interior by gun barrel (1) one end
Footpath is equal to or more than the internal diameter of gun barrel (1).
4. coal rifle according to claim 3, it is characterised in that：The cermet nozzle (3) is interior by gun barrel (1) one end
Footpath is less than or equal to the internal diameter of the other end.
5. the coal rifle according to claim 1,2,3 or 4, it is characterised in that：The cermet nozzle (3) is by screw thread
(7) it is connected with outer wall of steel pipe (4).
6. the coal rifle according to claim 1,2,3 or 4, it is characterised in that：Emanator (5) the page distance between commutator segments is 2-
6mm。
7. coal rifle according to claim 1, it is characterised in that：The pipette tips (2) account for the 5-7% of gun barrel (1) length.
8. coal rifle according to claim 1, it is characterised in that：Emanator (5) the cermet matter laminated structure and steel
Angle between pipe outer wall (4) is 30-40 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710335402.0A CN107130071B (en) | 2017-05-12 | 2017-05-12 | A kind of coal rifle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710335402.0A CN107130071B (en) | 2017-05-12 | 2017-05-12 | A kind of coal rifle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107130071A true CN107130071A (en) | 2017-09-05 |
| CN107130071B CN107130071B (en) | 2019-05-28 |
Family
ID=59731589
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710335402.0A Expired - Fee Related CN107130071B (en) | 2017-05-12 | 2017-05-12 | A kind of coal rifle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107130071B (en) |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4356975A (en) * | 1980-03-07 | 1982-11-02 | Combustion Engineering, Inc. | Nozzle tip for pulverized coal burner |
| CN1230249A (en) * | 1996-07-08 | 1999-09-29 | 燃烧工程有限公司 | Pulverized solid fuel nozzle tip |
| CN201825967U (en) * | 2010-09-26 | 2011-05-11 | 宝山钢铁股份有限公司 | Cyclone injection lance for blast furnace injection |
| CN204042955U (en) * | 2014-09-04 | 2014-12-24 | 郑州鼎力新能源技术有限公司 | A kind of coal nozzle |
-
2017
- 2017-05-12 CN CN201710335402.0A patent/CN107130071B/en not_active Expired - Fee Related
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4356975A (en) * | 1980-03-07 | 1982-11-02 | Combustion Engineering, Inc. | Nozzle tip for pulverized coal burner |
| CN1230249A (en) * | 1996-07-08 | 1999-09-29 | 燃烧工程有限公司 | Pulverized solid fuel nozzle tip |
| CN201825967U (en) * | 2010-09-26 | 2011-05-11 | 宝山钢铁股份有限公司 | Cyclone injection lance for blast furnace injection |
| CN204042955U (en) * | 2014-09-04 | 2014-12-24 | 郑州鼎力新能源技术有限公司 | A kind of coal nozzle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107130071B (en) | 2019-05-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20200901 Address after: 064100 Hebei Yutian Economic Development Zone, Yutian County, Tangshan City, Hebei Province Patentee after: Yutian Yusheng container Co., Ltd Address before: Peace Village Tang Long Highway 212400 Zhenjiang city of Jiangsu province Jurong Baohua town near Patentee before: JIANGSU JIN JI SPECIAL STEEL Co.,Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20190528 Termination date: 20210512 |