CN211876001U - Air cooling device of steam superheater - Google Patents
Air cooling device of steam superheater Download PDFInfo
- Publication number
- CN211876001U CN211876001U CN201921984069.7U CN201921984069U CN211876001U CN 211876001 U CN211876001 U CN 211876001U CN 201921984069 U CN201921984069 U CN 201921984069U CN 211876001 U CN211876001 U CN 211876001U
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- China
- Prior art keywords
- air
- combustion chamber
- superheater
- steam
- cooling
- 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.)
- Expired - Fee Related
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- 238000001816 cooling Methods 0.000 title claims abstract description 33
- 238000002485 combustion reaction Methods 0.000 claims abstract description 22
- 238000010438 heat treatment Methods 0.000 claims abstract description 10
- 238000002347 injection Methods 0.000 claims abstract description 9
- 239000007924 injection Substances 0.000 claims abstract description 9
- 238000013021 overheating Methods 0.000 claims abstract description 9
- 230000001105 regulatory effect Effects 0.000 claims abstract description 5
- 239000012535 impurity Substances 0.000 claims abstract description 4
- 229920006395 saturated elastomer Polymers 0.000 description 4
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 239000003546 flue gas Substances 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 239000000446 fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000009628 steelmaking Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
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Abstract
The utility model discloses a steam superheater air cooling device, it includes: the overheating stove comprises a combustion chamber and a convection flue arranged at one end of the combustion chamber; the superheater comprises a plurality of steam heating tube bundles, and the steam heating tube bundles shuttle from the convection flue; the air preheater is arranged on the side of the overheating stove and is used for removing impurities from air; one end of the cooling air pipeline is communicated with the end of the outlet of the air preheater and is communicated with the other end of the combustion chamber through a cooling air injection port arranged on the side surface of the combustion chamber; the number of the cooling air injection ports is multiple; two burners are arranged in the combustion chamber; and a regulating valve is arranged on a pipe section of the cooling air pipeline close to the end communicated with the outlet of the air preheater. The utility model is used for when steam superheater is in the underload operation, to steam superheater release cooling air, make its cooling, avoid the pipe fitting etc. to receive the harm because of overheated.
Description
Technical Field
The utility model belongs to the technical field of gas type steam superheater, especially, relate to a steam superheater air cooling device.
Background
At present, a large amount of saturated steam is generated in the production process of iron and steel enterprises, the saturated steam is subjected to overheating treatment according to different application requirements, and a steam superheater is equipment for heating the saturated steam into superheated steam.
The steam superheater is divided into a front part and a rear part, wherein a front combustion chamber is arranged in the front part, a convection flue is arranged in the rear part, and a steam heating tube bundle is arranged in the convection flue. During operation, the temperature of the outlet of the hearth is controlled by adjusting the fuel quantity.
There may be a problem with the above approach: since the saturated steam to be heated comes from the steel making process and the flow rate fluctuation is large, the lowest flow rate is often lower than the lowest design flow rate. When the steam superheater operates at a low load, the temperature of the wall of the superheater tube is high and is difficult to control due to the low flow of superheated steam and the high temperature of the flue gas at the outlet of the hearth; at high load operation, the superheated steam flow is normal and the superheater tube wall temperature is within the tube tolerance. Steam superheater tubes can generate thermal stress under frequent load fluctuation, and cracks are generated at the weaker elbow parts of the tubes to cause the explosion of the superheater tubes. Resulting in increased operating costs of the furnace and necessitating a shorter annual repair cycle.
SUMMERY OF THE UTILITY MODEL
In order to overcome the defects of the prior art, the utility model aims at providing a steam superheater air cooling device for when the steam superheater is in the low-load operation, to steam superheater release cooling air, make it cool down, avoid the pipe fitting etc. to receive the harm because of overheated.
In order to realize the purpose of the utility model, the utility model relates to a steam superheater air cooling device, it includes:
the overheating stove comprises a combustion chamber and a convection flue arranged at one end of the combustion chamber;
the superheater comprises a plurality of steam heating tube bundles, and the steam heating tube bundles shuttle from the convection flue;
the air preheater is arranged on the side of the overheating stove and is used for removing impurities from air;
and one end of the cooling air pipeline is communicated with the end of the outlet of the air preheater and is communicated with the other end of the combustion chamber through a cooling air injection port arranged on the side surface of the combustion chamber.
Further, the number of the cooling air injection ports is multiple.
Further, two burners are installed in the combustion chamber.
Furthermore, a regulating valve is arranged on a pipe section of the cooling air pipeline close to the end of the outlet of the communicated air preheater.
Compared with the prior art, implement the beneficial effects of the utility model reside in that:
(1) this patent is from the flue gas temperature before the superheater when control low-load operation at reasonable scope beginning, prevents that the superheater from damaging.
(2) The structure is simple, the adjustment is convenient, and the device can provide corresponding cooling air to timely cool the pipe fittings in the superheater when the steam superheater is in a low-load state.
Drawings
Fig. 1 is a schematic structural view of the present invention;
in the figure, 1, a regulating valve; 2. a cooling air injection port; 3. a cooling air duct; 4. a combustion chamber; 5. a convection flue; 6. a steam heating tube bundle; 7. an air preheater; 8. a burner; 9. and the end head is communicated with the outlet of the air preheater.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below can be arbitrarily combined to form a new embodiment without conflict.
As shown in fig. 1, a steam superheater air cooling device includes but is not limited to:
the overheating stove comprises a combustion chamber 4 and a convection flue 5 arranged at one end of the combustion chamber 4;
the superheater comprises a plurality of steam heating tube bundles 6 which shuttle from the convection flue 5;
the air pre-processor 7 is an air pre-processor which is arranged on the side of the overheating stove and used for removing impurities from air;
and one end of the cooling air pipeline 3 is communicated with a tip 9 of an air preheater outlet, and is communicated with the other end of the combustion chamber 4 through a cooling air injection port 2 arranged on the side surface of the combustion chamber 4.
Preferably, the number of the cooling air injection ports 2 is plural.
Preferably, two burners 8 are installed in the combustion chamber 4.
Preferably, a regulating valve 1 is arranged on a pipe section of the cooling air pipeline 3 close to the end 9 communicated with the outlet of the air preheater.
The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention cannot be limited thereby, and any insubstantial changes and substitutions made by those skilled in the art based on the present invention are all within the protection scope of the present invention.
Claims (4)
1. An air cooling device of a steam superheater is characterized by comprising:
the overheating stove comprises a combustion chamber and a convection flue arranged at one end of the combustion chamber;
the superheater comprises a plurality of steam heating tube bundles, and the steam heating tube bundles shuttle from the convection flue;
the air preheater is arranged on the side of the overheating stove and is used for removing impurities from air;
and one end of the cooling air pipeline is communicated with the end of the outlet of the air preheater and is communicated with the other end of the combustion chamber through a cooling air injection port arranged on the side surface of the combustion chamber.
2. A steam superheater air cooling apparatus as claimed in claim 1, wherein: the number of the cooling air injection ports is multiple.
3. A steam superheater air cooling apparatus as claimed in claim 1, wherein: two burners are installed in the combustion chamber.
4. A steam superheater air cooling apparatus as claimed in claim 1, wherein: and a regulating valve is arranged on a pipe section of the cooling air pipeline close to the end communicated with the outlet of the air preheater.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921984069.7U CN211876001U (en) | 2019-11-15 | 2019-11-15 | Air cooling device of steam superheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921984069.7U CN211876001U (en) | 2019-11-15 | 2019-11-15 | Air cooling device of steam superheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211876001U true CN211876001U (en) | 2020-11-06 |
Family
ID=73240897
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921984069.7U Expired - Fee Related CN211876001U (en) | 2019-11-15 | 2019-11-15 | Air cooling device of steam superheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN211876001U (en) |
-
2019
- 2019-11-15 CN CN201921984069.7U patent/CN211876001U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20201106 |