CN212901587U - Premixing flue gas type air preheater - Google Patents
Premixing flue gas type air preheater Download PDFInfo
- Publication number
- CN212901587U CN212901587U CN202021473577.1U CN202021473577U CN212901587U CN 212901587 U CN212901587 U CN 212901587U CN 202021473577 U CN202021473577 U CN 202021473577U CN 212901587 U CN212901587 U CN 212901587U
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- China
- Prior art keywords
- flue gas
- air
- pipeline
- air preheater
- outlet
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- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 title claims abstract description 57
- 239000003546 flue gas Substances 0.000 title claims abstract description 57
- 239000000779 smoke Substances 0.000 claims abstract description 16
- 239000007770 graphite material Substances 0.000 claims abstract description 6
- UHZZMRAGKVHANO-UHFFFAOYSA-M chlormequat chloride Chemical compound [Cl-].C[N+](C)(C)CCCl UHZZMRAGKVHANO-UHFFFAOYSA-M 0.000 claims 1
- 238000005260 corrosion Methods 0.000 abstract description 9
- 230000007797 corrosion Effects 0.000 abstract description 9
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 abstract description 7
- 238000002485 combustion reaction Methods 0.000 abstract description 7
- 238000004519 manufacturing process Methods 0.000 abstract description 7
- 239000001301 oxygen Substances 0.000 abstract description 7
- 229910052760 oxygen Inorganic materials 0.000 abstract description 7
- 239000002918 waste heat Substances 0.000 abstract description 6
- 238000010438 heat treatment Methods 0.000 abstract description 5
- 230000007613 environmental effect Effects 0.000 abstract description 4
- 230000002349 favourable effect Effects 0.000 abstract description 3
- 238000011084 recovery Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 abstract description 2
- 150000004767 nitrides Chemical class 0.000 abstract description 2
- 230000015572 biosynthetic process Effects 0.000 abstract 1
- 239000000203 mixture Substances 0.000 description 5
- 238000000034 method Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 229910002804 graphite Inorganic materials 0.000 description 1
- 239000010439 graphite Substances 0.000 description 1
- 238000005272 metallurgy Methods 0.000 description 1
- 239000003208 petroleum Substances 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
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Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/34—Indirect CO2mitigation, i.e. by acting on non CO2directly related matters of the process, e.g. pre-heating or heat recovery
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- Air Supply (AREA)
- Chimneys And Flues (AREA)
Abstract
A premixed flue gas type air preheater relates to the technical field of flue gas waste heat recovery, and comprises an air preheater, wherein a cold air inlet and a flue gas outlet are arranged on one side of the air preheater, and a preheated air outlet and a flue gas inlet are arranged on the other side of the air preheater; the cold air inlet and the smoke outlet are connected through a first pipeline, and a first fan is arranged in the first pipeline; solve dew point corrosion promptly, mixed the flue gas again, the nitride has been reduced and has been generated, the corrosion problem benefit of air heater has been solved more to the adoption graphite material, can reduce exhaust gas temperature, improve heating furnace equipment's thermal efficiency, the oxygen content that reduces combustion air is favorable to reducing NOx's formation in the combustion process, make production environmental protection more, increase the flue gas total amount, improve flue gas circulation speed, make to transfer heat more evenly, improve the heat transfer capacity promptly equipment handling capacity, heating furnace equipment moves safelyr simultaneously.
Description
Technical Field
The utility model belongs to the technical field of flue gas waste heat recovery technique and specifically relates to a mix flue gas type air heater in advance.
Background
The waste heat of the flue gas generally exists in production devices in the industries of petroleum, chemical industry, electric power, metallurgy and the like, and whether the waste heat can be effectively recovered becomes an important index for energy consumption assessment of the production devices. Theoretically, the smoke exhaust temperature can be reduced to be close to the environmental temperature by adopting the smoke waste heat recovery system, so that the heating furnace achieves the highest heat efficiency, but the smoke exhaust temperature is restricted by the low-temperature dew point corrosion phenomenon, and the control of the wall temperature to be higher than the smoke dew point temperature is the most effective means for reducing the corrosion. At present, the measures for controlling the wall temperature of the air preheater with three structural types of a pipe type, a heat pipe type and a plate type in China are different, from the viewpoint of using effect, the low-temperature dew point corrosion is difficult to avoid, and the probability of occurrence in winter is higher than that in summer.
Moreover, because the added combustion air has higher oxygen content, NOx is easy to generate in the combustion process and is not easy to decompose, and the problem that how to reduce the production of the NOx is urgently needed to be solved by people at present is solved.
SUMMERY OF THE UTILITY MODEL
In order to overcome not enough in the background art, the utility model discloses a mix flue gas type air heater in advance, the utility model discloses a prevent the corrosion problem of air heater at the inner wall magic graphite coating, avoid the dew point corrosion temperature of equipment operation, be favorable to long period operation and equipment safety, sneak into the oxygen content that the flue gas reduces combustion air in the air and reduce combustion air's oxygen content.
In order to realize the utility model aims at, the utility model adopts the following technical scheme:
a premixed flue gas type air preheater comprises an air preheater, wherein a cold air inlet and a flue gas outlet are arranged on one side of the air preheater, and a preheated air outlet and a flue gas inlet are arranged on the other side of the air preheater;
the cold air inlet and the smoke outlet are connected through a first pipeline, and a first fan is arranged in the first pipeline;
the preheated air outlet and the flue gas inlet are also connected through a second pipeline, and a second fan is arranged inside the second pipeline.
And the air flow direction in the first pipeline is from the smoke outlet to the cold air inlet.
And the air flow direction in the second pipeline is from the flue gas inlet to the preheated air outlet.
The interior of the air preheater is one or more of a plate type, a tube type or a heat pipe type.
And graphite material layers are coated on the inner walls of the cold air inlet, the air preheater, the preheated air outlet, the flue gas inlet, the pipeline I and the pipeline II.
Since the technical scheme is used, the utility model discloses following beneficial effect has:
a mix flue gas type air heater in advance, solve dew point corrosion promptly, mixed the flue gas again, reduced the nitride and generated, the corrosion problems benefit of air heater has been solved more to the graphite material, can reduce the exhaust gas temperature, improve the thermal efficiency of heating furnace equipment, the oxygen content that reduces combustion-supporting air is favorable to reducing NOx's in the combustion process generation, make production environmental protection more, increase the flue gas total amount, improve flue gas circulation speed, make the heat transfer more even, improve the heat transfer volume and be equipment handling capacity, heating furnace equipment moves safelyr simultaneously.
Drawings
FIG. 1 is a flow chart of the present invention;
1. a cold air inlet; 2. an air preheater; 3. a preheated air outlet; 4. a first fan; 5. a second fan; 6. a flue gas outlet; 7. a hot flue gas inlet.
Detailed Description
The invention will be explained in more detail by the following examples, which disclose the invention and are intended to protect all technical improvements within the scope of the invention.
The premixed flue gas type air preheater described with reference to fig. 1 comprises an air preheater 2, wherein a cold air inlet 1 and a flue gas outlet 6 are installed on one side of the air preheater 2, and a preheated air outlet 3 and a flue gas inlet 7 are installed on the other side of the air preheater 2;
the cold air inlet 1 and the smoke outlet 6 are connected through a first pipeline 8, and a first fan 4 is installed inside the first pipeline 8; the working of the first fan 4 is controlled, so that the adding amount of the flue gas is controlled;
the preheated air outlet 3 is also connected with the flue gas inlet 7 through a second pipeline 9, a second fan 5 is arranged inside the second pipeline 9, and the work of the second fan 5 is controlled, so that the adding amount of the flue gas is controlled.
The air flow direction in the pipeline I8 is from the smoke outlet 6 to the cold air inlet 1, so that the smoke in the smoke outlet 6 can be conveniently mixed into the cold air inlet 1.
The air flow direction in the second pipeline 9 is from the flue gas inlet 7 to the preheated air outlet 3, so that the flue gas in the flue gas inlet 7 can be conveniently added into the preheated air outlet 3.
The interior of the air preheater 2 is any one or more of a plate type, a tube type or a heat pipe type.
And graphite material layers are coated on the inner walls of the cold air inlet 1, the air preheater 2, the preheated air outlet 3, the flue gas outlet 6, the flue gas inlet 7, the first pipeline 8 and the second pipeline 9. The arrangement of the graphite material layer ensures that the interior of the equipment is not easily corroded by hot air and water vapor, and the service life is prolonged.
In the embodiment 1, when the premixed flue gas type air preheater is used, air to be preheated is added into the air preheater 2 from the cold air inlet 1, flue gas for recovering waste heat is added into the air preheater 2 from the position of the flue gas inlet 7, and through heat exchange operation in the air preheater 2, the air is discharged from the position of the preheated air outlet 3, and the flue gas is discharged from the position of the flue gas outlet 6;
when the temperature of the added air is too low, the added air can be preheated through the smoke discharged from the smoke outlet 6, and the smoke can be mixed into the air through the fan I4, so that the air entering can be heated, the oxygen content in the air can be effectively reduced, the generation of NOx in the using process is reduced, and the production is more environment-friendly;
the flue gas that 3 exhaust air temperature of preheated air outlet after air heater 2 handles was crossed when low through hot flue gas entry 7 entering preheats it, also can mix the flue gas of hot flue gas entry 7 inside through fan two 5 and mix in the inside of preheating air outlet 3 air, not only can heat the air that gets into and can the oxygen content in the effectual reduction air, NOx's in the use generation has been reduced for production environmental protection more.
The invention is not described in detail in the prior art, and although the invention has been specifically shown and described in connection with the preferred embodiments, the method and the way of implementing the technical solution are numerous, and only the preferred embodiments of the invention have been described above, it should be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims, which are within the scope of the invention.
Claims (5)
1. The utility model provides a premix flue gas type air heater, includes air heater (2), characterized by: a cold air inlet (1) and a flue gas outlet (6) are arranged on one side of the air preheater (2), and a preheated air outlet (3) and a flue gas inlet (7) are arranged on the other side of the air preheater (2);
the cold air inlet (1) is connected with the smoke outlet (6) through a first pipeline (8), and a first fan (4) is installed inside the first pipeline (8);
the preheated air outlet (3) is also connected with the flue gas inlet (7) through a second pipeline (9), and a second fan (5) is arranged inside the second pipeline (9).
2. A premixed flue gas type air preheater according to claim 1, wherein: the air in the first pipeline (8) flows from the smoke outlet (6) to the cold air inlet (1).
3. A premixed flue gas type air preheater according to claim 1, wherein: and the air in the second pipeline (9) flows from the flue gas inlet (7) to the preheated air outlet (3).
4. A premixed flue gas type air preheater according to claim 1, wherein: the interior of the air preheater (2) is any one or more of a plate type, a tube type or a heat pipe type.
5. A pre-mix flue gas type air preheater as set forth in any one of claims 1 to 3, wherein: and graphite material layers are coated on the inner walls of the cold air inlet (1), the air preheater (2), the preheated air outlet (3), the flue gas outlet (6), the flue gas inlet (7), the first pipeline (8) and the second pipeline (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021473577.1U CN212901587U (en) | 2020-07-23 | 2020-07-23 | Premixing flue gas type air preheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021473577.1U CN212901587U (en) | 2020-07-23 | 2020-07-23 | Premixing flue gas type air preheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212901587U true CN212901587U (en) | 2021-04-06 |
Family
ID=75292339
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021473577.1U Active CN212901587U (en) | 2020-07-23 | 2020-07-23 | Premixing flue gas type air preheater |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212901587U (en) |
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2020
- 2020-07-23 CN CN202021473577.1U patent/CN212901587U/en active Active
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20240322 Address after: No. 824, 8th Floor, Building 11, Donglixin, Erqi Theater Road, Xicheng District, Beijing, 100032 Patentee after: Chen Li Country or region after: China Address before: 471000 Banpo village, Changbao Township, Mengjin County, Luoyang City, Henan Province Patentee before: LUOYANG LEBANG PETROCHEMICAL EQUIPMENT Co.,Ltd. Country or region before: China |
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| TR01 | Transfer of patent right |