CN216049224U - Sintering circulation flue gas mixer - Google Patents
Sintering circulation flue gas mixer Download PDFInfo
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- CN216049224U CN216049224U CN202122374982.9U CN202122374982U CN216049224U CN 216049224 U CN216049224 U CN 216049224U CN 202122374982 U CN202122374982 U CN 202122374982U CN 216049224 U CN216049224 U CN 216049224U
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Abstract
The utility model discloses a sintering circulating flue gas mixer, and belongs to the technical field of sintering flue gas circulating processes. The device comprises a mixer main body, an oxygen blowing nozzle, a porous plate, a circular cooler flue gas inlet pipeline, a sintering flue gas inlet pipeline and a mixed flue gas outlet pipeline; the mixer main body is cylindrical; the mixed flue gas outlet pipeline is communicated with the top end opening of the mixer main body; the circular cooler flue gas inlet pipeline and the sintering flue gas inlet pipeline are positioned at the bottom of the mixer main body and penetrate through the side wall of the mixer main body, and are symmetrical about the axial section of the mixer main body; the oxygen blowing nozzle is arranged at the bottom end of the mixer main body; the perforated plate is arranged in the cavity of the mixer main body. The utility model can quickly and uniformly mix the flue gas of the circular cooler and the sintering circulating flue gas, and improve the oxygen content and temperature of the mixed flue gas, thereby ensuring the quality of sintered ore.
Description
Technical Field
The utility model belongs to the technical field of sintering flue gas circulation processes, and particularly relates to a sintering circulation flue gas mixer.
Background
At present, iron and steel enterprises face two main problems: firstly, the problem of pollutant emission is solved, and as the national environmental protection policy is more and more perfect, the pollutant emission limit standard is more and more strict; the other is the energy utilization problem, as is well known, steel enterprises as energy-intensive enterprises have a lot of waste heat resources but cannot effectively utilize the waste heat resources. In order to solve the two problems faced by iron and steel enterprises, the reduction emission of iron ore sintering flue gas and the process energy conservation are realized, and the sintering flue gas circulation process is developed.
The sintering flue gas circulation process is a method for returning flue gas at the tail part or the middle front part of the sintering machine to a sintering charge level for sintering through a sealing smoke hood at the upper part of the sintering machine. The process has the following characteristics: the air supply position is flexibly selected; the dust-containing flue gas is filtered in the sintering layer, so that the dust amount discharged into the atmosphere can be reduced; harmful components in the exhaust gas enter the sintering layer to be decomposed or converted, and dioxin and NOxWill be partially eliminated, dust and SOxWill be captured by the sintered layer; CO in the flue gas is used as fuel, so that solid fuel consumption can be reduced; the circulation reduces the amount of flue gas discharged by chimney treatment, and reduces the load of terminal treatment. However, the process also has some negative effects, such as O in the circulating flue gas2Low content, low temperature of circulating flue gas, and dust and SO in the flue gasxAnd pollutants flow back into the sinter bed, and the changes have certain influence on the sinter.
In order to reduce the negative effect of the sintering circulation flue gas process on the sintered ore and improve the inlet air oxygen content and inlet air temperature in the flue gas circulation sintering process, O needs to be added2The high-content and high-temperature flue gas of the circular cooler is mixed with the sintering circulating flue gas, and the mixing effect of the gas directly influences the quality of the sintered ore. Therefore, the design of the sintering flue gas mixer is particularly critical.
SUMMERY OF THE UTILITY MODEL
The technical problem to be solved is as follows: aiming at the technical problems, the utility model provides a sintering circulating flue gas mixer which can quickly and uniformly mix the flue gas of a circular cooler and the sintering circulating flue gas and improve the oxygen content and temperature of the mixed flue gas, thereby ensuring the quality of sintered ores.
The technical scheme is as follows: a sintering circulating flue gas mixer comprises a mixer main body, an oxygen blowing nozzle, a porous plate, a circular cooler flue gas inlet pipeline, a sintering flue gas inlet pipeline and a mixed flue gas outlet pipeline; the mixer main body is cylindrical; the mixed flue gas outlet pipeline is communicated with the top end opening of the mixer main body; the circular cooler flue gas inlet pipeline and the sintering flue gas inlet pipeline are positioned at the bottom of the mixer main body and penetrate through the side wall of the mixer main body, and are symmetrical about the axial section of the mixer main body; the oxygen blowing nozzle is arranged at the bottom end of the mixer main body; the perforated plate is arranged in the cavity of the mixer main body.
Preferably, a rotational flow included angle is formed between the circular cooler flue gas inlet pipeline and the sintering flue gas inlet pipeline and the axial cross section of the mixer main body respectively, and the rotational flow included angle is 5-30 degrees.
Preferably, the sintering circulation flue gas mixer further comprises an oxygen detector arranged in the mixed flue gas outlet pipeline.
Preferably, the top of the mixer main body gradually shrinks in diameter and is communicated with the mixed flue gas outlet pipeline.
Preferably, the perforated plate has an aperture ratio of 35 to 60%.
Preferably, the oxygen blowing nozzles are uniformly distributed on the bottom end face of the mixer main body, and the number of the oxygen blowing nozzles is 30-40.
Has the advantages that: the utility model can rapidly and uniformly mix the three-section flue gas of the circular cooler and the sintering circulating flue gas, improve the mixing efficiency and mixing uniformity of the two flue gas gases, ensure the uniform oxygen content in the mixed gas, monitor the oxygen concentration of the mixed flue gas in real time through the oxygen detection device, and improve the oxygen concentration of the mixed flue gas through the oxygen blowing nozzle when the oxygen content is lower than the optimal working condition, thereby ensuring the quality of sintered ores.
Drawings
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic view of the distribution of oxygen blowing nozzles;
FIG. 3 is a schematic view of a partial structure of a multi-well plate;
the numerical references in the figures represent the following meanings: 1. the device comprises a mixer main body, 2 oxygen blowing nozzles, 3 porous plates, 4 circular cooler flue gas inlet pipelines, 5 sintering flue gas inlet pipelines, 6 mixed flue gas outlet pipelines and 7 oxygen detectors.
Detailed Description
The utility model is further described with reference to the following figures and specific examples.
Example 1
As shown in fig. 1, the sintering circulation flue gas mixer comprises a mixer main body 1, an oxygen blowing nozzle 2, a porous plate 3, a circular cooler flue gas inlet pipeline 4, a sintering flue gas inlet pipeline 5 and a mixed flue gas outlet pipeline 6. The mixer main body 1 is cylindrical, the diameter of the top of the mixer main body is gradually reduced and the mixer main body is communicated with a mixed flue gas outlet pipeline 6. The mixed flue gas outlet pipeline 6 is communicated with the top end opening of the mixer main body 1 and is used for discharging the uniformly mixed flue gas. The circular cooler flue gas inlet pipeline 4 and the sintering flue gas inlet pipeline 5 are respectively installed at the bottom of the mixer main body 1 and used for conveying circular cooler three-section flue gas and sintering circulation system flue gas, penetrate through the side wall of the mixer main body 1, are symmetrical about the axial section of the mixer main body 1, and respectively form 5-30-degree rotational flow included angles with the axial section of the mixer main body 1, and the flue gas rotational flow enters the mixer, so that the disturbance degree of gas flow is increased, and gas mixing and heat exchange are accelerated. The perforated plate 3 is arranged in the cavity of the mixer main body 1 and is positioned above the flue gas inlet, and after the mixed flue gas is rectified by the perforated plate 3, the uniformity of the mixed flue gas speed, the oxygen concentration and the temperature on the cross section of the mixed flue gas outlet pipeline 6 is enhanced. The oxygen blowing nozzles 2 are 30-40 in total, are uniformly distributed on the bottom end face of the mixer main body 1, and are used for improving the oxygen concentration of mixed flue gas and further improving the quality of sintered ore.
Example 2
As shown in fig. 1, a sintering circulation flue gas mixer comprises a mixer main body 1, an oxygen blowing nozzle 2, a porous plate 3, a circular cooler flue gas inlet pipeline 4, a sintering flue gas inlet pipeline 5, a mixed flue gas outlet pipeline 6 and an oxygen detector 7. The mixer main body 1 is cylindrical, the diameter of the top of the mixer main body is gradually reduced and the mixer main body is communicated with a mixed flue gas outlet pipeline 6. The mixed flue gas outlet pipeline 6 is communicated with the top end opening of the mixer main body 1 and is used for discharging the uniformly mixed flue gas. The cold quick-witted flue gas inlet pipeline 4 of ring and sintering flue gas inlet pipeline 5 install in the bottom of blender main part 1, be used for carrying cold quick-witted three-section flue gas of ring and sintering circulation system flue gas respectively, it runs through the lateral wall of blender main part 1 to axial cross-section symmetry about blender main part 1, and form 5~30 whirl contained angle with the axial cross-section of blender main part 1 respectively, the whirl contained angle is 15 in this embodiment, the flue gas whirl gets into the blender, the disturbance degree of gas flow has been increased, gas mixing and heat exchange have been accelerated.
As shown in fig. 3, the porous plate 3 is installed in the cavity of the mixer main body 1, is located above the flue gas inlet, has an aperture ratio of 35-60%, and after the mixed flue gas is rectified by the porous plate 3, the uniformity of the mixed flue gas velocity, the oxygen concentration and the temperature on the cross section of the mixed flue gas outlet pipeline 6 is enhanced.
The oxygen detector 7 is arranged in the mixed flue gas outlet pipeline 6, can monitor the oxygen concentration of the mixed flue gas in real time, and opens the oxygen blowing nozzle 2 to improve the oxygen content when the oxygen content is lower than the optimal working condition. As shown in fig. 2, 30 to 40 oxygen blowing nozzles 2, 33 in the embodiment, are uniformly distributed on the bottom end surface of the mixer main body 1, specifically, the following distribution mode: one is arranged at the center of the bottom end surface of the mixer main body 1, the radius of the bottom end surface is equally divided into three concentric circles, and the rest oxygen blowing nozzles 2 are uniformly distributed on the circumference of the concentric circles; the oxygen blowing nozzle 2 can improve the oxygen concentration of the mixed flue gas, and further improve the quality of the sinter.
Claims (6)
1. A sintering circulating flue gas mixer is characterized by comprising a mixer main body (1), an oxygen blowing nozzle (2), a porous plate (3), a circular cooler flue gas inlet pipeline (4), a sintering flue gas inlet pipeline (5) and a mixed flue gas outlet pipeline (6); the mixer main body (1) is cylindrical; the mixed flue gas outlet pipeline (6) is communicated with the top end opening of the mixer main body (1); the circular cooler flue gas inlet pipeline (4) and the sintering flue gas inlet pipeline (5) are positioned at the bottom of the mixer main body (1) and penetrate through the side wall of the mixer main body (1), and are symmetrical about the axial section of the mixer main body (1); the oxygen blowing nozzle (2) is arranged at the bottom end of the mixer main body (1); the porous plate (3) is arranged in the cavity of the mixer main body (1).
2. The sintering circulation flue gas mixer according to claim 1, wherein the circular cooler flue gas inlet pipeline (4) and the sintering flue gas inlet pipeline (5) respectively form a rotational flow included angle with the axial section of the mixer main body (1), and the angle of the rotational flow included angle is 5-30 degrees.
3. The mixer according to claim 1, characterized by the fact that it also comprises an oxygen detector (7) placed in the mixed flue gas outlet duct (6).
4. Sinter circulation flue gas mixer according to claim 1, characterised in that the top of the mixer body (1) is tapered in diameter and communicates with the mixed flue gas outlet duct (6).
5. The sintering circulation flue gas mixer according to claim 1, wherein the perforated plate (3) has an opening ratio of 35-60%.
6. The sintering circulation flue gas mixer according to claim 1, wherein the oxygen blowing nozzles (2) are uniformly distributed on the bottom end surface of the mixer main body (1) and the number of the oxygen blowing nozzles is 30-40.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122374982.9U CN216049224U (en) | 2021-09-29 | 2021-09-29 | Sintering circulation flue gas mixer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122374982.9U CN216049224U (en) | 2021-09-29 | 2021-09-29 | Sintering circulation flue gas mixer |
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| Publication Number | Publication Date |
|---|---|
| CN216049224U true CN216049224U (en) | 2022-03-15 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122374982.9U Active CN216049224U (en) | 2021-09-29 | 2021-09-29 | Sintering circulation flue gas mixer |
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| CN (1) | CN216049224U (en) |
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2021
- 2021-09-29 CN CN202122374982.9U patent/CN216049224U/en active Active
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