A spray swirl burner with acoustic damping tube and position-adjustable swirl disc
A swirl burner and damping tube technology, used in burners, lighting and heating equipment, etc., can solve the hazards of burners and furnaces, affect the stability and life of boilers and burners, and unstable combustion of oil-fired boiler chamber systems. problem, to achieve the effect of improving combustion stability and overcoming longitudinal combustion vibration
Active Publication Date: 2019-04-09
ZHEJIANG UNIV
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Problems solved by technology
[0002] The burners of oil-fired boilers mostly adopt the diffusion combustion method. After the fuel oil passes through the atomizing nozzle, it is mixed with air to burn. Due to the fast oil combustion speed and low nitrogen measures, it is easy to cause combustion instability in the oil-fired boiler chamber system, resulting in furnace vibration.
[0003] When the thermal-acoustic instability of the oil-fired boiler occurs, it will cause great harm to the burner and the furnace, affecting the stability and life of the boiler and burner
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[0023] Such as figure 1 The schematic diagram of the spray swirl burner shown includes: inlet air duct 1, air inlet 2, oil delivery pipe 3, damping pipe 4, external swirl burner 5, inner and outer air dividing cylinder 9, swirl disc 6 and fuel nozzle 7.
[0024] The front part of the inlet duct 1 is the air inlet, and the air enters the burner from the air inlet 2, and the air is passively divided into two streams at the inner and outer air splitter tube 9. Part of the air enters the furnace through the external swirl burner 5, and the other part participates in combustion after passing through the swirl disc 6.
[0025] The damping pipe 4 is arranged behind the inlet air inlet 2 and before the inner and outer air separation cylinder 9 and the outer swirler 5 . After the damping pipe is welded as a whole, it is welded with the inlet air duct casing. The outer diameter of the overall disc of the damping tube 4 is consistent with the inner diameter of the inlet air duct, and t...
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The invention discloses an atomizing turbulent burner with an acoustics damping pipe and a position adjustable rotational flow disc. The atomizing turbulent burner comprises an inlet air flue, an oil conveying pipe stretching into the inlet air flue, a fuel nozzle arranged at the end portion of the oil conveying pipe, an air inlet located in an air flue front section of the inlet air flue, an interior and exterior air division barrel arranged in an air flue rear section of the inlet air flue, and an exterior whirlcone arranged between the interior and exterior air division barrel and the inlet air flue. The rotational flow disc with the adjustable axial position is arranged outside the fuel nozzle. Air led into the air inlet is divided into two parts through the interior and exterior air division barrel, one part of air enters a boiler combustion chamber through the exterior whirlcone, and the other part of air is mixed with fuel of the fuel nozzle to be combusted. The damping pipe is arranged in the inlet air flue between the exterior turbulent burner and the air inlet and used for absorbing acoustic energy in the burner. Through the combination of the acoustics damping pipe and the position adjustable rotational flow disc, longitudinal combustion vibration of the burner is effectively avoided, and the combustion stability of the burner is improved.
Description
technical field [0001] The invention relates to the field of oil-fired boiler burners, in particular to a spray swirl burner with an acoustic damping tube and a position-adjustable swirl disc. Background technique [0002] Oil-fired boiler burners mostly adopt the diffusion combustion method. After the fuel oil passes through the atomizing nozzle, it is mixed with air to burn. Due to the fast oil combustion speed and low-nitrogen measures, it is easy to cause combustion instability in the oil-fired boiler chamber system, resulting in furnace vibration. [0003] When the thermal-acoustic instability of the oil-fired boiler occurs, it will cause great harm to the burner and the furnace, and affect the stability and life of the boiler and burner. Contents of the invention [0004] Aiming at the problems existing in the prior art, the invention provides a spray swirl burner with an acoustic damping pipe and a position-adjustable swirl disk. In order to slow down the thermoaco...
Claims
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IPC IPC(8): F23D11/00F23D11/36
CPCF23D11/00F23D11/36
Inventor 周昊孟晟岑可法
Owner ZHEJIANG UNIV