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Double-injection type fuel gas grading ultra-low nitrogen burner

A gas classification and ejection technology, which is applied to gas fuel burners, burners, combustion methods, etc., can solve problems such as inability to meet emission requirements, achieve cost savings, maintain stability, and improve adaptability and reliability Effect

Active Publication Date: 2022-03-25
BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The above combustion technologies cannot meet the relevant emission requirements

Method used

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  • Double-injection type fuel gas grading ultra-low nitrogen burner
  • Double-injection type fuel gas grading ultra-low nitrogen burner
  • Double-injection type fuel gas grading ultra-low nitrogen burner

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Embodiment Construction

[0026] The present invention will be further elaborated below in conjunction with embodiment.

[0027] The present invention designs a double-injection gas graded ultra-low-nitrogen burner. Utilizing the working principle of the injector, high-pressure and high-speed gas (gas and air) is used to inject low-pressure and low-speed flue gas in the furnace, so that fuel, air and flue gas Mixing is performed to achieve low-oxygen combustion of the fuel. The invention can make the current combustion be carried out under the deviation from the stoichiometric ratio, thereby reducing the local high-temperature area in the furnace and reducing NOx emission. The double-injection gas graded ultra-low nitrogen burner of the present invention does not need to increase the induced draft fan and the corresponding process control system and pipeline, which saves the equipment cost, and also reduces the occupied area of ​​the equipment, and has a high promotional use value.

[0028] The inven...

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Abstract

The invention relates to a double-injection type fuel gas grading ultra-low nitrogen burner which comprises an air bellow, an inner air cylinder, an air bellow throttling cylinder, a shrinkage conical cylinder, a circulating flue gas injection cylinder, a peripheral fuel gas nozzle, a peripheral flue gas injection cylinder, a flame stabilizing disc, a central flame stabilizing nozzle, an air flue adjustable cone, a connecting rod assembly and an ignition gun. According to the invention, air is utilized to eject flue gas to reduce the oxygen content in the air, and high-speed fuel gas is utilized to eject the flue gas, so that the fuel gas can be subjected to low-oxygen combustion, and a flue gas recirculation technology is realized. In the implementation of the invention, an induced draft fan and corresponding control equipment and pipelines are not additionally used, so that a large amount of cost is saved. The air duct adjustable cone is arranged, the flue gas injection amount of the circulating flue gas air duct is adjusted by adjusting the connecting rod assembly, and stable combustion of fuel and emission of ultra-low nitrogen oxide can be both considered.

Description

technical field [0001] The invention relates to a double-injection gas graded ultra-low nitrogen burner, which is applied to industrial heat carrier heating boilers. Background technique [0002] With the continuous acceleration of my country's economy and technology, the country's environmental protection standards are getting higher and higher. NOx emissions have brought huge economic losses. After NOx is discharged into the atmosphere, it will eventually lead to the destruction of the ozone layer, the greenhouse effect, acid rain, etc., which in turn will reduce crop production, human and animal eye and respiratory diseases, and even directly cause death. Reducing NOx emissions has become an urgent issue. [0003] The harm of NOx pollution has been valued by the state, and the state has become increasingly strict on NOx emission standards. The (GB31571-2015) petrochemical industry pollutant discharge standard implemented by the Ministry of Environmental Protection on Jul...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23D14/08F23D14/26F23D14/64F23D14/46
CPCF23D14/08F23D14/26F23D14/64F23D14/46F23D2203/007
Inventor 王健李易峰李忠义周春霄韩学斌李志浩闫玉平蒲孜
Owner BEIJING AEROSPACE PETROCHEM TECH & EQUIP ENG CORP LTD
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