CN214701780U - Flue gas self-sealing device for forced air drying section of chain grate - Google Patents
Flue gas self-sealing device for forced air drying section of chain grate Download PDFInfo
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- CN214701780U CN214701780U CN202120190424.4U CN202120190424U CN214701780U CN 214701780 U CN214701780 U CN 214701780U CN 202120190424 U CN202120190424 U CN 202120190424U CN 214701780 U CN214701780 U CN 214701780U
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Abstract
A flue gas self-sealing device for a forced air drying section of a chain grate belongs to the technical field of chain grates. The device comprises a main outlet pipeline (1) of a blast blower, a pipeline (2), an adjusting valve (3), a sealing fan cover (4), a blowing detection hole (5) and a partition wall (6); the forced air drying section and the air draft drying section of the chain grate are separated by a partition wall (6); the main outlet pipeline (1) of the blast blower is connected with a sealing fan cover (4) through a pipeline (2) and an adjusting valve (3); the regulating valve (3) is arranged on the pipeline (2), and the pipeline (2) is provided with a purging detection hole (5). The method has the advantages of solving the problem of flue gas leakage from the air draft drying section to the air blast drying section, being beneficial to reducing the scale of subsequent flue gas treatment facilities, saving energy consumption and reducing engineering investment and operation cost.
Description
Technical Field
The utility model belongs to the technical field of the chain grate, especially, a dry section flue gas of chain grate air blast is from sealing device is provided. The method is mainly used for solving the problem of flue gas leakage from the air draft drying section to the air blast drying section, is beneficial to reducing the scale of subsequent flue gas treatment facilities, saves energy consumption and reduces engineering investment and operation cost.
Background
The grate-rotary kiln is the mainstream method for producing oxidized pellets in China and plays an important role in the blast furnace burden preparation process.
28 th 4 th 2019, the ministry of ecological environment officially issued 'comments on propelling and implementing ultra-low emission in the steel industry', the small-average emission concentrations of the smoke particles, the sulfur dioxide and the nitrogen oxides in the sintering machine head and pellet roasting process are respectively not higher than 10, 35 and 50mg/Nm3(ii) a Therefore, how to reduce the equipment scale and the total amount of flue gas of the waste gas treatment desulfurization and denitrification system, reduce energy consumption, save engineering investment and operation cost is of great significance.
The chain grate machine mainly comprises a blast drying section, an air draft drying section and a preheating section, and usually, the waste flue gas of the blast drying section and the waste flue gas of the air draft drying section and the preheating section are separately treated and discharged. The waste flue gas components have direct relation with the components and the heating mode of the pellet raw materials, according to investigation and research, the waste flue gas nitrogen oxides of the air draft drying section and the preheating section far do not meet the national ultra-low emission standard requirement, the waste flue gas nitrogen oxide content of the air blast drying section of part of the chain grate machine can meet the national ultra-low emission requirement, and the denitration treatment can not be carried out.
According to the actual production condition of chain grate machine, the forced air drying section is generally only equipped with the partition wall with convulsions drying section, and the partition wall is great with chain grate machine charge level gap. Because the interior of the air draft section of the upper cover of the chain grate is positive pressure and the interior of the air blowing drying section is negative pressure, the smoke of the air draft section leaks into the air blowing drying section. In order to avoid the leakage of the flue gas, a sealing device which does not influence the production operation and is energy-saving and environment-friendly is required to be arranged.
Disclosure of Invention
An object of the utility model is to provide a drying section flue gas of drying of chain grate air blast is from sealing device, has solved the drying section of convulsions and to the dry section flue gas leakage problem of air blast, is favorable to reducing follow-up flue gas treatment facility scale, practices thrift the energy consumption, reduces engineering investment and running cost.
The utility model discloses mainly include that blast dry blower export trunk line 1, pipeline 2, governing valve 3, sealed fan housing 4, sweep inspection hole 5, partition wall 6.
The utility model discloses a drying section of drying of chain grate air-blast and convulsions drying section separate through partition wall 6, the drying section flue gas of air-blast drying is got from the dry air-blower export trunk line 1 of drum from the sealing device air supply, is the malleation in the dry air-blower export trunk line 1 of drum.
The outlet main pipeline 1 of the blast drier blower is connected with a sealing fan cover 4 through a pipeline 2 and an adjusting valve 3. The regulating valve 3 is arranged on the pipeline 2 for regulating and controlling the sealing air quantity; and a blowing detection hole 5 is formed in the pipeline 2 for air volume detection.
The utility model discloses the end of device sets up sealed fan housing 4, and 4 export airflows of sealed fan housing flow out through the injection form is high-speed.
The air speed at the outlet of the sealed fan cover 4, the height H of the surface of the sealed fan cover 4 and the chain grate machine are comprehensively considered and set according to the positive pressure in the main outlet pipeline 1 of the air blowing dry blower, the positive pressure in the air blowing dry section and the production and feeding data of the chain grate machine.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a sectional view taken along line a-a of fig. 1.
In the figure, a main outlet pipeline 1 of the dry blowing machine, a pipeline 2, an adjusting valve 3, a sealing fan cover 4, a blowing detection hole 5 and a partition wall 6.
Detailed Description
Fig. 1 and 2 show a specific embodiment of the present invention.
The utility model discloses a drying section of drying of chain grate air-blast and convulsions drying section separate through partition wall 6, the drying section flue gas of air-blast drying is got from the dry air-blower export trunk line 1 of drum from the sealing device air supply, is the malleation in the dry air-blower export trunk line 1 of drum.
And the outlet main pipeline 1 of the dry blowing machine is connected with a sealing fan cover 4 through a pipeline 2 and an adjusting valve 3. The regulating valve 3 is arranged on the pipeline 2 for regulating and controlling the sealing air quantity; and a blowing detection hole 5 is formed in the pipeline 2 for air volume detection.
The air speed at the outlet of the sealed fan cover 4, the height H of the surface of the sealed fan cover 4 and the chain grate machine are comprehensively considered and set according to the positive pressure in the main outlet pipeline 1 of the air blowing dry blower, the positive pressure in the air blowing dry section and the production and feeding data of the chain grate machine.
Claims (2)
1. The utility model provides a drying section flue gas of chain grate forced air is from sealing device which characterized in that: the device comprises a main outlet pipeline (1) of a blast blower, a pipeline (2), an adjusting valve (3), a sealing fan cover (4), a blowing detection hole (5) and a partition wall (6); the forced air drying section and the air draft drying section of the chain grate are separated by a partition wall (6); the main outlet pipeline (1) of the blast blower is connected with a sealing fan cover (4) through a pipeline (2) and an adjusting valve (3); the regulating valve (3) is arranged on the pipeline (2), and the pipeline (2) is provided with a purging detection hole (5).
2. Grate forced air drying segment flue gas self-sealing device according to claim 1, characterized in that the device is provided with a sealing hood (4) at its end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120190424.4U CN214701780U (en) | 2021-01-22 | 2021-01-22 | Flue gas self-sealing device for forced air drying section of chain grate |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120190424.4U CN214701780U (en) | 2021-01-22 | 2021-01-22 | Flue gas self-sealing device for forced air drying section of chain grate |
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| CN214701780U true CN214701780U (en) | 2021-11-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120190424.4U Active CN214701780U (en) | 2021-01-22 | 2021-01-22 | Flue gas self-sealing device for forced air drying section of chain grate |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683072A (en) * | 2021-01-22 | 2021-04-20 | 北京首钢国际工程技术有限公司 | Flue gas self-sealing device for forced air drying section of chain grate |
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2021
- 2021-01-22 CN CN202120190424.4U patent/CN214701780U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112683072A (en) * | 2021-01-22 | 2021-04-20 | 北京首钢国际工程技术有限公司 | Flue gas self-sealing device for forced air drying section of chain grate |
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