CN215062069U - Cracking furnace attaches high-efficient low NOx burner of wall - Google Patents
Cracking furnace attaches high-efficient low NOx burner of wall Download PDFInfo
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- CN215062069U CN215062069U CN202120933948.8U CN202120933948U CN215062069U CN 215062069 U CN215062069 U CN 215062069U CN 202120933948 U CN202120933948 U CN 202120933948U CN 215062069 U CN215062069 U CN 215062069U
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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
Abstract
A cracking furnace wall-attached high-efficiency low-nitrogen combustor comprises a diffusion nozzle, a body, an air inlet, a fan cover and a rain shield. The body is provided with a fan cover, and a narrow air duct is formed between the air duct and the furnace wall plate. The diffusion nozzle is protruded relative to the traditional burner nozzle and extends out of the refractory brick and the furnace wall. The wall-attached flame area of the burner is expanded, the temperature gradient at the periphery of the burner is reduced, the thermal stress of a steel structure at the periphery of the burner is reduced, and the furnace tube is heated more uniformly due to the expansion of the flame area. The upper part of the fan cover is provided with a rain shield to ensure that the combustor can stably operate under various working conditions. When the cracking furnace burns, air enters the air inlet of the combustor through the area between the air cover of the combustor and the wall plate of the combustor, heat exchange is carried out between low-temperature air and the wall plate of the high-temperature furnace, the wall plate of the furnace heats the air, the heated air enters the combustor through the air inlet of the combustor and is mixed and combusted with fuel, the heat dissipation loss of the cracking furnace is reduced, and the heat efficiency of the heating furnace is improved.
Description
Technical Field
The application belongs to the technical field of cracking furnace burners and relates to a cracking furnace wall-attached high-efficiency low-nitrogen burner.
Background
The cracking furnace is the largest energy-consuming equipment in an ethylene plant, and the burner is an important component of the cracking furnace. The heat efficiency of the heating furnace is improved, the furnace tube is heated uniformly, the service life of the furnace tube is prolonged, and the heat dissipation loss of the furnace wall is reduced as much as possible, which is always a problem to be solved by the industry. When the burner of the cracking furnace burns, the flame is attached to the peripheral furnace wall of the burner and is not diffused, so that the temperature of the furnace wall plate in the flame attached wall area is greatly higher than that in other areas. The temperature of the furnace wall around the combustor is high, and the heat dissipation loss is large. The wall-attached flame formed by the combustion nozzle of the existing cracking furnace burner is small, so that the peripheral temperature gradient of the nozzle is large, and the heating is uneven.
SUMMERY OF THE UTILITY MODEL
In order to overcome the problems, the wall-attached high-efficiency combustor of the cracking furnace is provided. The burner can recover the heat lost by the high-temperature wall plate, is used for heating combustion air, reduces the heat loss of the heating furnace and improves the heat efficiency of the heating furnace. The temperature fields of the furnace wall plate and the steel structure are more uniform, and the internal thermal stress of the steel structure is reduced. The burner nozzle is upgraded, so that the flame wall attachment area is larger, the temperature gradient is reduced, the furnace tube is heated more uniformly, and the service life of the furnace tube is prolonged. The fan cover is added on the outer side of the combustor, air enters the air inlet of the combustor through the area between the fan cover of the combustor and the furnace wall plate during combustion, heat exchange is carried out between low-temperature air and the high-temperature furnace wall plate in the process, the furnace wall plate heats the air, and the heated air enters the combustor through the air inlet of the combustor and is mixed with fuel for combustion. Therefore, the local high temperature of the furnace wall plate can be reduced, the heat dissipation loss of the cracking furnace is reduced, and the air is heated, so that the heat efficiency of the heating furnace is improved.
The technical scheme adopted by the application is as follows:
a cracking furnace wall-attached high-efficiency low-nitrogen combustor comprises a combustor diffusion nozzle 1, a combustor body 2, a combustor air inlet 3, a combustor fan cover 4 and a rain baffle 5. The combustor is provided with a combustor fan cover 4, and a narrow air channel is formed between the air channel and the furnace wall plate.
The burner diffusion nozzle protrudes relative to conventional burner nozzles, extending beyond the refractory brick and the furnace wall. The wall-attached flame area of the burner is expanded from the traditional area I to the area II; the expansion of the flame area can reduce the temperature gradient around the burner, reduce the thermal stress of the steel structure around the burner, and the expansion of the flame area can make the furnace tube heated more uniformly.
The upper part of the combustor fan cover 4 is provided with a rain baffle 5, so that the combustor can stably operate under various working conditions.
When the cracking furnace burns, air enters the air inlet of the combustor through the area between the fan cover of the combustor and the wall plate of the combustor, heat exchange is carried out between low-temperature air and the wall plate of the high-temperature furnace, the wall plate of the furnace heats the air, and the heated air enters the combustor through the air inlet of the combustor and is mixed with fuel for combustion. Therefore, the local high temperature of the furnace wall plate can be reduced, the heat dissipation loss of the cracking furnace is reduced, and the heat efficiency of the heating furnace is also improved.
Drawings
Fig. 1 is a partially enlarged view of a burner.
FIG. 2 is a side view of the burner
Fig. 3 is a front view of the burner.
FIG. 4 is a side view of the burner
In the figure: 1, a burner nozzle; 2 a burner body; 3, a combustor air inlet; 4, a combustor fan cover;
5 rain shield.
Detailed Description
The following is further described with reference to the accompanying drawings.
As shown in fig. 1, 2 and 3, the cracking furnace wall-attached high-efficiency low-nitrogen burner mainly comprises a burner nozzle 1, a burner body 2, a burner air inlet 3, a burner fan cover 4 and a rain shield 5. Cold air enters the air cover of the burner 4 to exchange heat with the high-temperature furnace wall plate, and the heated air enters the burner 3 through the air inlet of the burner 3 to support combustion. The specific diffusion nozzle of the burner 1 slightly protrudes relative to the traditional burner, the length of the specific diffusion nozzle protrudes by about 2-3 cm compared with the traditional burner, the wall-attached flame area of the burner is expanded, and the wall-attached flame area is expanded from the traditional area I to the area II.
Claims (5)
1. A cracking furnace wall-attached efficient combustor is characterized by comprising a combustor diffusion nozzle (1), a combustor body (2), a combustor air inlet (3), a combustor fan cover (4) and a rain baffle (5); the burner diffusion nozzle protrudes out of the refractory brick and the furnace wall.
2. The wall-attached high-efficiency burner of the cracking furnace is further characterized in that a burner hood (4) is arranged on the burner, and an elongated air channel is formed between the air channel and the furnace wall plate.
3. The cracking furnace wall-attached high-efficiency burner as claimed in claim 1 or 2, wherein a rain shield (5) is arranged at the upper part of the burner hood (4).
4. The cracking furnace wall-attached high-efficiency burner as claimed in claim 1 or 2, wherein the burner diffusion nozzle protrudes by about 2-3 cm compared with the conventional burner.
5. The high efficiency wall-attached burner of claim 3, wherein the burner diffusion nozzle protrudes by a length of about 2-3 cm from that of a conventional burner.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120933948.8U CN215062069U (en) | 2021-05-01 | 2021-05-01 | Cracking furnace attaches high-efficient low NOx burner of wall |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120933948.8U CN215062069U (en) | 2021-05-01 | 2021-05-01 | Cracking furnace attaches high-efficient low NOx burner of wall |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215062069U true CN215062069U (en) | 2021-12-07 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120933948.8U Active CN215062069U (en) | 2021-05-01 | 2021-05-01 | Cracking furnace attaches high-efficient low NOx burner of wall |
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| CN (1) | CN215062069U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137604A (en) * | 2021-05-01 | 2021-07-20 | 大庆华凯石油化工设计工程有限公司 | Cracking furnace attaches high-efficient low NOx burner of wall |
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2021
- 2021-05-01 CN CN202120933948.8U patent/CN215062069U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113137604A (en) * | 2021-05-01 | 2021-07-20 | 大庆华凯石油化工设计工程有限公司 | Cracking furnace attaches high-efficient low NOx burner of wall |
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