CN113237347B - Sintering flue gas circulating air mixing method - Google Patents
Sintering flue gas circulating air mixing method Download PDFInfo
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- CN113237347B CN113237347B CN202110419645.9A CN202110419645A CN113237347B CN 113237347 B CN113237347 B CN 113237347B CN 202110419645 A CN202110419645 A CN 202110419645A CN 113237347 B CN113237347 B CN 113237347B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F27—FURNACES; KILNS; OVENS; RETORTS
- F27D—DETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
- F27D17/00—Arrangements for using waste heat; Arrangements for using, or disposing of, waste gases
- F27D17/001—Extraction of waste gases, collection of fumes and hoods used therefor
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Abstract
A sintering flue gas circulation air mixing method belongs to the technical field of sintering flue gas recycling. The method comprises the specific steps that a branched forked component flue gas pipe of the air mixer is connected with a spiral blade concentric sleeve pipe and then connected with a reinforced uniform mixing spiral flue gas main pipe; in the concentric sleeve of the helical blade, the helical blade is used as a supporting structure; the central flue is also provided with helical blades to change straight wind into spiral wind; designing the number of branch pipelines of the component flue gas according to the number of the air channels; the component flue gas passes through the annular air duct, is changed in direction by the helical blades and simultaneously enters the reinforced uniformly-mixed helical flue gas main pipe; after the different types of flue gas are decelerated and rotationally mixed, the flue gas is redirected by a helical blade, the flue gas is uniformly and intensively mixed once again, and the mixed air is connected into a process pipeline. Has the advantages that: the uniform air mixing can realize homogenization and quantifiability, and the fine management level of the circulating flue gas is improved.
Description
Technical Field
The invention belongs to the technical field of sintering flue gas recycling, and particularly relates to a sintering flue gas circulating and air mixing method. The problems that in a sintering flue gas circulation process, the source of flue gas is wide and miscellaneous, the temperature and components of each flue gas are not uniform, the flue gas is not sufficiently mixed, the components of each part in the mixed flue gas are not uniformly distributed, and the temperature distribution of each area in the mixed flue gas is not uniform are solved. The uniform mixing effect of the flue gas with different properties can be greatly improved, the uniform mixing wind can be homogenized and metered after the component wind is uniformly mixed, and the fine management level of the circulating flue gas is improved.
Background
In the sintering flue gas circulation technology, wind with different properties is often required to be mixed with each other to meet specific requirements, such as temperature, oxygen content, pressure, concentration of trace elements and the like. The purpose of flue gas mixing is to realize the uniformity of chemical components of mixed wind and the concentration of each part of fluid and realize determined temperature and enthalpy. The better the flue gas mixing quality is, the more energy control and measurement are performed, and the more refinement of production and the accuracy of control can be realized. The method has positive significance for improving the production automatic control level and the scientific research design level. The better the air mixing effect, the more beneficial to sintering production. The good flue gas air mixing effect is a continuously pursued target.
Disclosure of Invention
The invention aims to provide a sintering flue gas circulating air mixing method, which solves the problems that in a sintering flue gas circulating process, the source of flue gas is wide and impure, the temperature and the components of each flue gas are not uniform, the flue gas is not sufficiently mixed, the components of each part in the mixed flue gas are not uniformly distributed, and the temperature distribution of each area in the mixed flue gas is not uniform.
A sintering flue gas circulation air mixing method comprises the following specific steps and parameters:
1. the different component flue gas convergence is connected with an air mixer, and the air mixer comprises a branched component flue gas pipe 1, a spiral blade concentric sleeve 2 and a reinforced uniform mixing spiral flue gas main pipe 3; the component flue gas pipeline is connected with a branched component flue gas pipe 1, the branched component flue gas pipe 1 is connected with a spiral blade concentric sleeve 2, the spiral blade concentric sleeve 2 is connected with a reinforced uniform mixing spiral flue gas main pipe 3, and the reinforced uniform mixing spiral flue gas main pipe 3 is connected with an air outlet pipe;
2. different types of wind flow between interlayers in the concentric sleeve 2 with the helical blades; helical blades are used as supporting structures among all layers of sleeves; the central flue is also provided with helical blades to change straight wind into spiral wind; a plurality of layers of sleeve-type air channels are arranged according to the types of the incoming air, and the number of the air channels of each type of air is at least two; the deflection directions of the helical blades on each layer are consistent; the more the sleeve air channel goes to the center, the longer the cylinder is, so that the branched component flue gas pipe 1 can be conveniently connected;
3. the number of branch pipelines for separating the flue gas is designed according to the number of air channels, and one type of air is provided with at least two branch air pipes; for the spiral blade concentric sleeve 2, the whole access pipeline of the component smoke is in a branch shape; the component flue gas passes through the annular air duct, is changed in direction by the helical blades, and simultaneously enters the reinforced uniformly-mixed helical flue gas main pipe 3;
4. after the different types of flue gas are decelerated and rotationally mixed, the flue gas is redirected by a helical blade, the flue gas is uniformly and intensively mixed once again, and the mixed air is connected into a process pipeline.
The wind mixer is externally coated with a 50mm rock wool layer, and is externally coated with galvanized iron.
The materials of the various pipelines and the helical blades are t =12mm, Q345 carbon steel.
The technology is mainly applied to flue gas circulation sintering, and the uniform mixing and temperature equalization of flue gas at different temperatures provide mixed flue gas with uniform temperature of each part. Not only the temperature is uniform, but also the chemical components and the material components in the smoke can be uniform and stable.
When the flow rate of the fluid is large and the requirement on the mixing quality is low, one channel can be arranged on one fluid; the flow rate of the fluid is small, and when the requirement on the mixing quality is high, more than two channels can be arranged on one fluid.
All the helical blades have deflection angles of 30-70 degrees.
The invention has the advantages that: after the quantized component air is uniformly mixed, the uniformly mixed air can realize homogenization and quantificational, and the fine management level of the circulating flue gas is improved. Is suitable for uniformly mixing any fluid.
Drawings
Fig. 1 is a schematic diagram of a flue gas circulation air mixing method. Wherein, the branch component flue gas pipe 1, the spiral blade concentric sleeve 2 and the reinforced uniform mixing spiral flue gas main pipe 3.
FIG. 2 is a schematic view of a concentric double pipe flue.
FIG. 3 is a schematic view of an intensive mixing tube.
Detailed Description
A sintering flue gas circulation air mixing method comprises the following specific steps and parameters:
1. the different component flue gas convergence is connected with an air mixer, and the air mixer comprises a branched component flue gas pipe 1, a spiral blade concentric sleeve 2 and a reinforced mixing spiral flue gas main pipe 3; the branch-shaped branched component flue gas pipe 1 is connected with the branch-shaped branched component flue gas pipe 1, the branch-shaped branched component flue gas pipe 1 is connected with the spiral blade concentric sleeve 2, the spiral blade concentric sleeve 2 is connected with the reinforced uniform mixing spiral flue gas main pipe 3, and the reinforced uniform mixing spiral flue gas main pipe 3 is connected with the air outlet pipe;
2. different types of wind flow between the interlayers in the concentric sleeve 2 with the helical blades; helical blades are used as a supporting structure among all layers of sleeves; the central flue is also provided with helical blades to change straight wind into spiral wind; a plurality of layers of sleeve-type air channels are arranged according to the types of the incoming air, and the number of the air channels of each type of air is two; the deflection directions of the helical blades on each layer are consistent; the more the sleeve air channel goes to the center, the longer the cylinder is, so that the branched component flue gas pipe 1 can be conveniently connected;
3. the number of branch pipelines for separating flue gas is designed according to the number of air channels, and one air duct is provided with two branch air pipes; for the spiral blade concentric sleeve 2, the whole access pipeline of the component smoke is in a branch shape; the component flue gas passes through the annular air duct, is changed in direction by the helical blades, and simultaneously enters the reinforced uniform mixing helical flue gas main pipe 3;
4. after the different types of flue gas are decelerated and rotationally mixed, the flue gas is redirected by a helical blade, the flue gas is uniformly and intensively mixed once again, and the mixed air is connected into a process pipeline.
Taking the attached figure 1 as an example, the flue gas A and the flue gas B need to be mixed into mixed flue gas with uniform temperature and components. The flue gas pipe A is branched and connected with a sleeve air pipe, two annular flues of the sleeve air pipe are filled with flue gas A, a helical blade is arranged in an annular channel, and the flue gas A is discharged by rotating air after being changed in direction by the blade. The flue gas B is also forked and is respectively connected with the central pipeline and the annular flue, the annular flue and the central flue are both provided with helical blades, and the flue gas B is redirected into helical wind to be respectively discharged. The flue gas A and the flue gas B are fully mixed in the flue gas main pipe 3 in a spiral motion state. And a group of helical blades is arranged at the outlet of the flue gas main pipe 3, the mixed flue gas rotates once again, and the channel C is discharged. The helical blades are arranged in the same direction between every two layers in the sleeve pipe, as shown in the attached figure 2. The outlet of the flue gas main pipe is provided with a helical blade as shown in figure 3.
The flue gas A is generally provided with two channels, if necessary, one channel or a plurality of channels. The same applies to the B flue gas; if more than two kinds of smoke exist, the number of the concentric sleeves 2 is increased.
The wind mixer is externally coated with a 50mm rock wool layer and is externally wrapped with galvanized iron. The material of the pipeline and the helical blade adopts t =12mm, Q345 carbon steel.
All helical blades are angled at 45 degrees.
Claims (4)
1. A sintering flue gas circulating air mixing method is characterized by comprising the following specific steps and parameters:
1) the convergence of the smoke with different components is connected with an air mixer, and the air mixer comprises a branched component smoke pipe (1), a spiral blade concentric sleeve pipe (2) and a reinforced uniform mixing spiral smoke main pipe (3); the branched forked component flue gas pipe (1) is connected with the branched forked component flue gas pipe (1), the branched forked component flue gas pipe (1) is connected with the spiral blade concentric sleeve (2), the spiral blade concentric sleeve (2) is connected with the reinforced uniform mixing spiral flue gas main pipe (3), and the reinforced uniform mixing spiral flue gas main pipe (3) is connected with the air outlet pipe;
2) Different types of wind flow between the interlayers in the concentric sleeve (2) with the helical blades; helical blades are used as a supporting structure among all layers of sleeves; the central flue is also provided with helical blades to change straight wind into spiral wind; a plurality of layers of sleeve-type air channels are arranged according to the types of the incoming air, and the number of the air channels of each type of air is at least two; the deflection directions of the helical blades on each layer are consistent;
3) The number of the branched pipelines of the component smoke is designed according to the number of the air channels, and one type of air is at least provided with two branched air pipes; for the spiral blade concentric sleeve (2), the whole access pipeline of the component smoke is in a branch shape; the component flue gas passes through the annular air duct, is changed in direction by the helical blades and simultaneously enters the reinforced uniformly-mixed helical flue gas main pipe (3);
4) After the different types of flue gas are decelerated and rotationally mixed, the flue gas is redirected by a helical blade, the flue gas is uniformly and intensively mixed once again, and the mixed air is connected into a process pipeline.
2. The method as claimed in claim 1, wherein the mixer is coated with 50mm rock wool layer and galvanized iron.
3. The method of claim 1, wherein the material of the various pipes and helical blades is t =12mm, q345 carbon steel.
4. A method according to claim 1, wherein all helical blades are angled between 30 and 70 degrees.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110419645.9A CN113237347B (en) | 2021-04-19 | 2021-04-19 | Sintering flue gas circulating air mixing method |
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Citations (7)
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| CN203517786U (en) * | 2013-08-02 | 2014-04-02 | 无锡市德信环保机械设备有限公司 | Multiple-fuel-gas secondary down-flow combined burner |
| CN103816822A (en) * | 2014-02-20 | 2014-05-28 | 沈阳化工大学 | In-tube concentric double helix static mixer |
| CN203904380U (en) * | 2014-05-23 | 2014-10-29 | 北京首钢国际工程技术有限公司 | Rotational flow injection air mixing device |
| CN105276996A (en) * | 2015-11-30 | 2016-01-27 | 中冶华天工程技术有限公司 | Flue gas circulation sintering air mixing system |
| CN206881534U (en) * | 2017-04-26 | 2018-01-16 | 中冶长天国际工程有限责任公司 | A kind of double-screw type flue gas recirculation sintered compound device |
| CN209166132U (en) * | 2018-12-03 | 2019-07-26 | 北京晟龙伟嘉科技有限公司 | A kind of sintering flue gas wind-mixer |
| CN210420041U (en) * | 2019-07-22 | 2020-04-28 | 鞍山市丰林精密锻压件有限公司 | Novel quenching chamber of spiral wind direction continuous isothermal normalizing furnace |
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- 2021-04-19 CN CN202110419645.9A patent/CN113237347B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203517786U (en) * | 2013-08-02 | 2014-04-02 | 无锡市德信环保机械设备有限公司 | Multiple-fuel-gas secondary down-flow combined burner |
| CN103816822A (en) * | 2014-02-20 | 2014-05-28 | 沈阳化工大学 | In-tube concentric double helix static mixer |
| CN203904380U (en) * | 2014-05-23 | 2014-10-29 | 北京首钢国际工程技术有限公司 | Rotational flow injection air mixing device |
| CN105276996A (en) * | 2015-11-30 | 2016-01-27 | 中冶华天工程技术有限公司 | Flue gas circulation sintering air mixing system |
| CN206881534U (en) * | 2017-04-26 | 2018-01-16 | 中冶长天国际工程有限责任公司 | A kind of double-screw type flue gas recirculation sintered compound device |
| CN209166132U (en) * | 2018-12-03 | 2019-07-26 | 北京晟龙伟嘉科技有限公司 | A kind of sintering flue gas wind-mixer |
| CN210420041U (en) * | 2019-07-22 | 2020-04-28 | 鞍山市丰林精密锻压件有限公司 | Novel quenching chamber of spiral wind direction continuous isothermal normalizing furnace |
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