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A fully premixed water-cooled gas burner with dynamically adjustable airflow channels

A gas burner and air flow channel technology, applied in the direction of gas fuel burners, burners, combustion types, etc., can solve the problem of unadjustable gaps in water-cooled burners, etc., to reduce the theoretical combustion temperature, stabilize the flame, and increase the excess air coefficient Effect

Active Publication Date: 2022-03-08
XI AN JIAOTONG UNIV +1
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the problem that the gap between the flat water-cooled burner and the cylindrical gap-type water-cooled burner cannot be adjusted, the present invention provides a fully premixed water-cooled combustion head with dynamically adjustable airflow channels. According to the speed of the premixed gas, different adjustments The mechanism changes the distance between the deflector plate and the water-cooled tube bundle, adjusts the size of the gap, and prevents the occurrence of tempering and defiring. The premixed gas injected from the gap is cooled by the water-cooled tube bundle, reducing the temperature of the flame and reducing formation of nitrogen oxides

Method used

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  • A fully premixed water-cooled gas burner with dynamically adjustable airflow channels
  • A fully premixed water-cooled gas burner with dynamically adjustable airflow channels
  • A fully premixed water-cooled gas burner with dynamically adjustable airflow channels

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Embodiment Construction

[0036] The present invention is described in further detail below in conjunction with accompanying drawing:

[0037]In order to meet the combustion requirements of premixed gas at different flow rates, make it possible to adjust the gap as large as possible when the speed is high to prevent defiring, and to reduce the gap as much as possible to prevent backfire when the speed is small, a fully premixed water cooling system with adjustable gap is proposed. The combustion head, through a certain adjustment mechanism, adjusts the distance between the deflector adjustment plate and the water-cooled tube bundle, thereby changing the size of the gap and realizing the full combustion of the premixed gas at different flow rates. At the same time, compared with other types of fully premixed gas burners, because the water-cooled tube bundle occupies the flow cross-section of the mixed gas, the flow rate of the mixed gas is high, and the flame size is long, which will inevitably increase ...

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Abstract

The invention discloses a fully premixed water-cooled gas burner with dynamically adjustable airflow channels, which includes a premixer, a flow equalization orifice and a water-cooled tube bundle combustion head. Air and gas are completely mixed in the premixer and then pass through the equalization orifice Evenly distributed to the combustion head of the water-cooled tube bundle, the water-cooled tube bundle is arranged at equal intervals, and the two ends are connected to the annular header. The plate is connected to the output end of the adjustment mechanism; the water-cooled tube bundle is provided with longitudinal fins, and the airflow channel between the deflector adjustment plate and the water-cooled tube bundle is changed through different adjustment mechanisms to prevent tempering and defiring, so that the flame distribution, speed and direction are all in the Dynamically adjustable state; the flame is limited by the longitudinal fins and tangential combustion occurs while reducing the radial length of the flame and the diameter of the furnace to make the boiler more compact; the flame and air flow are double continuously cooled by the water-cooled tube bundle and the longitudinal fins to effectively reduce the flame temperature. Deeply reduces the formation of nitrogen oxides.

Description

technical field [0001] The invention belongs to the field of safe and stable low-nitrogen combustion of natural gas and burner design, and in particular relates to a fully premixed water-cooled gas burner with dynamically adjustable airflow channels. Background technique [0002] With the gradual deterioration of the ecological environment, the prevention and control of air pollution is imminent. Many coal-fired power plants are vigorously responding to environmental protection requirements, striving to achieve ultra-low emission transformation, that is, the emission concentrations of soot, sulfur dioxide, and nitrogen oxides do not exceed 5mg / m3 3 、35mg / m 3 , 50mg / m 3 , NO x It is one of the main sources of air pollutants. Many places in China have lowered the emission limit of NOx to 50mg / m 3 Even 30mg / m 3 the following. Ultra-low nitrogen combustion technology is a new technology widely used in the market to achieve ultra-low nitrogen emissions. Gas-fired boiler ul...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F23D14/02F23D14/26F23D14/46F23D14/70F23D14/78F23D14/62
CPCF23D14/02F23D14/70F23D14/46F23D14/26F23D14/78F23D14/62F23D2203/007
Inventor 赵钦新何啸邓世丰仇建伟邵怀爽孟向军梁志远王云刚
Owner XI AN JIAOTONG UNIV
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