CN216473301U - Ou ye stove wind gap coal injection rifle - Google Patents
Ou ye stove wind gap coal injection rifle Download PDFInfo
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- CN216473301U CN216473301U CN202122554562.9U CN202122554562U CN216473301U CN 216473301 U CN216473301 U CN 216473301U CN 202122554562 U CN202122554562 U CN 202122554562U CN 216473301 U CN216473301 U CN 216473301U
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Abstract
The utility model discloses a coal injection gun at an air port of an Ou-smelting furnace, which comprises a coal injection main gun barrel, a peephole valve, a main oxygen gun, a recoil valve, a coal injection main gun barrel coal feeding control valve, a main oxygen gun flange, a main gun barrel support, a coal injection gun head, an oxygen coal small sleeve, a main oxygen gun control valve and a coal injection main gun barrel flange, wherein the coal injection main gun barrel is coaxially sleeved in the main oxygen gun at intervals, the tail ends of the coal injection main gun barrel and the main oxygen gun barrel are hermetically installed together through the main oxygen gun flange and the coal injection main gun barrel flange, the coal injection gun head at the front end of the coal injection main gun barrel is in a round platform shape and extends out from the front ends of the main oxygen gun and the oxygen coal injection small sleeve, the main gun barrel support is uniformly distributed between the front end of the main oxygen gun barrel and the front part of the coal injection main gun barrel, the main oxygen gun control valve is installed on the main oxygen gun, and the rear part of the coal injection main gun barrel flange is respectively provided with the peephole valve, the coal injection main gun barrel coal injection control valve and the recoil valve. The utility model has simple structure and effectively improves the combustion efficiency of the pulverized coal in the smelting reduction coal injection.
Description
Technical Field
The utility model belongs to the field of direct reduction and smelting reduction non-blast furnace ironmaking, and particularly relates to a tuyere coal injection gun of an Ou-Meta furnace.
Background
The pure oxygen tuyere is used in the industrial production process of the pyrometallurgical furnace, so that the theoretical combustion temperature of the tuyere is higher, molten iron contains high silicon, the gasification reaction of coal powder is completed in a melting reduction section and an airflow section of the gasification furnace in order to improve the metallization rate of the shaft furnace in the production process, the reduction reaction of the coal powder on ores and coke in the melting section and the reduction section is effectively carried out, so that the gas making effect of the injected coal powder is ensured, in addition, the coal can be fully decomposed and combusted in a tuyere convolution area with the temperature of more than 3000 ℃, the loading amount of foam coal (coke powder) on the upper part of the gasification furnace can be reduced, and the fuel ratio is reduced. Therefore, the smelting reduction of the Europe smelting furnace non-blast furnace adopts the coal injection technology, which not only reduces the fuel ratio of the Europe smelting furnace and the pig iron cost, but also improves the state of the gasification furnace hearth, stabilizes the smooth running of the gasification furnace and improves the metallization rate of the shaft furnace. However, the key parts of the coal injection gun in the coal injection device have the following disadvantages: burning loss and fusing (mainly occurring within 500mm of the front end), perforation and brush leakage (occurring at any part of the coal injection gun and mainly causing quality problems of the gun barrel of the spray gun, such as cracks, sand holes, folds and the like) and head cracking. The design forms of the coal injection guns at the present stage are various, but the injected oxygen is rich oxygen in blast of the blast furnace, and the temperature in front of a gun opening is much lower than that of the injected pure oxygen, so that the safety of the common coal injection gun for the blast furnace can not meet the requirements of the production of the European and metallurgical furnace and non-blast furnace ironmaking and melting industry; on the other hand, the mixing degree of oxygen and pulverized coal has direct influence on the combustion efficiency of pulverized coal injected into the furnace, and the mixing condition of oxygen-enriched air and pulverized coal in a coal injection gun of the blast furnace is completely different from the mixing condition of pure oxygen and pulverized coal in melting reduction. Therefore, the common coal injection lance cannot meet the requirement on mixing the coal powder and the gas required in the smelting reduction.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide an Ou-Meta furnace tuyere coal injection gun, which solves the problem of safe use of the coal injection gun at the high temperature of 3000 ℃ when an Ou-Meta furnace is not used for blast furnace ironmaking and smelting, and effectively improves the combustion efficiency of coal dust in smelting reduction coal injection.
The technical scheme adopted by the utility model is that the coal injection gun comprises a coal injection main gun barrel, a peephole valve, a main oxygen gun, a recoil valve, a coal injection main gun barrel coal feeding control valve, a main oxygen gun flange, a main gun barrel support, a coal injection gun head, a small oxygen coal sleeve, a main oxygen gun control valve and a coal injection main gun barrel flange, wherein the coal injection main gun barrel is coaxially sleeved in the main oxygen gun at intervals, the tail ends of the coal injection main gun barrel and the main oxygen gun barrel are hermetically installed together through the main oxygen gun flange and the coal injection main gun barrel flange, the coal injection gun head at the front end of the coal injection main gun barrel is in a round table shape and extends out from the front ends of the main oxygen gun and the small oxygen coal sleeve, the main gun barrel supports are uniformly distributed between the front end of the main oxygen gun barrel and the front part of the coal injection main gun barrel, the main oxygen gun control valve is installed on the main oxygen gun, and the rear part of the coal injection main gun barrel flange is respectively provided with the peephole valve, the coal injection main gun barrel coal injection control valve and the recoil valve.
The utility model realizes the purpose of fully mixing the coal dust and the oxygen at the coal injection gun head by adopting a coaxial and concentric jet flow combination mode for the coal dust flow and the oxygen flow. Since the coaxial, concentric jets pass through the cryogenic oxygen cooled lance, this enables the coal lance to be safely used at a temperature level of 3000 ℃.
Drawings
The present invention will be described in further detail below with reference to the accompanying drawings.
FIG. 1: schematic diagram of coal injection lance of Ou metallurgical furnace;
in the figure: the coal injection main gun barrel comprises a coal injection main gun barrel 1, a peephole valve 2, a main oxygen gun 3, a recoil valve 4, a coal injection main gun barrel coal inlet control valve 5, a main oxygen gun flange 6, a main gun barrel support 7, a coal injection gun head 8, an oxygen coal small sleeve 9, a main oxygen gun control valve 10 and a coal injection main gun barrel flange 11.
Detailed Description
An Ou Meta furnace tuyere coal injection gun, as shown in figure 1, comprises a coal injection main gun tube 1, a peep hole valve 2, a main oxygen gun 3, a recoil valve 4, a coal injection main gun tube coal inlet control valve 5 and a main oxygen gun flange 6, main gun barrel supports 7, coal injection rifle head 8, little cover of oxygen coal 9, main oxygen gun control valve 10, coal injection main gun barrel flange 11, and 1 coaxial interval suit of coal injection main gun barrel is in main oxygen rifle 3, passes through between these two ends main oxygen rifle flange 6 and coal injection main gun barrel flange 11 seal installation together, and coal injection rifle head 8 of coal injection main gun barrel 1 front end is the round platform form and stretches out from main oxygen rifle 3 and the little 9 front ends of oxygen coal cover, and evenly distributed is setting up main gun barrel and is supporting 7 between 3 front ends of main oxygen rifle and 1 front portions of coal injection main gun barrel, is installing main oxygen gun control valve 10 on the main oxygen rifle 3, and coal injection main gun barrel flange 11 rear portion is setting up peephole valve 2, coal injection main gun barrel and is advancing coal control valve 5 and recoil valve 4 respectively. The small oxygen-coal sleeve 9 is arranged in the large gasifier tuyere sleeve 12, the front end of the main oxygen lance 3 is tightly matched and arranged with the small oxygen-coal sleeve 9 to prevent air leakage, the main coal injection lance tube 1 is inserted into the main oxygen lance 3 and is positioned by the main lance tube support 7 to prevent movement and keep coaxial and concentric. The coal injection gun head 8 is positioned at the front end of the small oxygen coal sleeve 9 and extends out, so that the small oxygen coal sleeve 9 is prevented from being burnt. The coal injection main gun tube 1 and the main oxygen gun 3 are tightly connected and fastened through a coal injection main gun tube flange 11 and a main oxygen gun flange 6, so that air leakage is prevented. Oxygen is controlled by a main oxygen gun control valve 10, coal powder is controlled by a coal feeding control valve 5 of a coal injection main gun barrel, and nitrogen is introduced for backflushing treatment by a backflushing valve 4 after the coal injection gun device is blocked. The utility model achieves the purpose of fully mixing the coal dust and the oxygen at the coal injection gun head by adopting a coaxial and concentric jet flow combination mode for the coal dust flow and the oxygen flow.
Claims (1)
1. The utility model provides an Ou smelt stove wind gap coal injection rifle, includes coal injection main gun pipe, peep hole valve, main oxygen rifle, recoil valve, coal injection main gun pipe advances coal control valve, main oxygen rifle flange, main gun pipe support, coal injection rifle head, oxygen coal little cover, main oxygen rifle control valve, coal injection main gun pipe flange, characterized by: the main coal injection gun barrel is sleeved in the main oxygen gun at the same shaft and at intervals, the tail ends of the main coal injection gun barrel and the main coal injection gun barrel are installed together in a sealing mode, a coal injection gun head at the front end of the main coal injection gun barrel is in a round table shape and extends out of the main oxygen gun and the front end of the small coal injection sleeve, the main oxygen gun barrel is arranged between the front end of the main oxygen gun and the front portion of the main coal injection gun barrel in a supporting mode in an evenly distributed mode, a main oxygen gun control valve is installed on the main oxygen gun, and a peephole valve, a coal injection main gun barrel coal feeding control valve and a recoil valve are arranged at the rear portion of the flange of the main coal injection gun barrel respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122554562.9U CN216473301U (en) | 2021-10-22 | 2021-10-22 | Ou ye stove wind gap coal injection rifle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122554562.9U CN216473301U (en) | 2021-10-22 | 2021-10-22 | Ou ye stove wind gap coal injection rifle |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216473301U true CN216473301U (en) | 2022-05-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122554562.9U Active CN216473301U (en) | 2021-10-22 | 2021-10-22 | Ou ye stove wind gap coal injection rifle |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216473301U (en) |
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2021
- 2021-10-22 CN CN202122554562.9U patent/CN216473301U/en active Active
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