Control method for multiple tail tube pulsating combustor and apparatus

A technology of pulsating combustion and control devices, which is applied in the direction of controlling combustion, lighting and heating equipment, etc. It can solve the problems that the acoustic characteristics affect the operating characteristics of the burner, and does not consider the influence of the pressure of the decoupling chamber, so as to achieve convenient adjustment and control and stable work , high efficiency effect

Inactive Publication Date: 2009-07-29
HARBIN INST OF TECH
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Problems solved by technology

[0003] In the past, changing the operating characteristics of the pulsating burner mainly focused on changing the geometric dimensions of the various components of the burner, or changing the supply mode of fuel and oxidant, without considering the influence of the pressure of the decoupling chamber
From the point of view of the principle of the pulsating burner, the pressure pulsation amplitude at the outlet plane of the tailpipe should be zero, but in the actual burner, there will be a certain amount of sound energy radiated from here, so the acoustic characteristics of the decoupling chamber will definitely affect the combustion. operating characteristics of the

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  • Control method for multiple tail tube pulsating combustor and apparatus

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Embodiment Construction

[0022] Such as figure 1 As shown, the above-mentioned multi-tail pipe pulsation burner and its control device are composed of an air supply device 1, a mixing chamber 2, an ignition device 3, a combustion chamber 4, a tail pipe 5, a decoupling chamber 6, a connecting pipe 7, and an exhaust valve 8 , Exhaust pipe 9, atmosphere valve 10, motor 11, induced draft fan 12 form. The above-mentioned tailpipe 4 adopts a multi-tailpipe structure, and the quantity and size are not limited.

[0023] Such as figure 1 As shown, the working process of the pulse burner is: gas and air enter the mixing chamber 2 through the gas supply device 1, and at the tail of the mixing chamber 2 (the side leading to the combustion chamber 4), the ignition device 3 ignites the mixed gas. Combustion raises the pressure in the combustion chamber 4 with heat release. When the pressure in the combustion chamber 4 rises to be greater than the pressure in the mixing chamber 2, the gas in the mixing chamber 2 ...

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Abstract

The invention discloses a method and a device for controlling a multi-tailpipe pulse combustor. A valve opening in front of a draft fan is regulated to change the pressure in a decoupling chamber, namely the tailpipe exit pressure; acoustic characteristics in the pulse combustor are changed to ensure the pulse combustion and heat release of the tailpipe section; at the same time, the connecting pipe section can experience heat exchange as a steady-state heating surface. The pulse combustor in the device of the invention can adopt the basic structure of the Helmholtz pulse combustor, consists of a mixing chamber, an air feeder, an ignition device, a combustor, a tailpipe and a decoupling chamber and applies the multi-tailpipe structure. The device for controlling the combustor is arranged at the back of the decoupling chamber and consists of a connecting pipe, a valve, an exhaust pipe, a draft fan and a motor. The controlling method of the invention features convenient operation, stable working and high efficiency.

Description

technical field [0001] The invention relates to a control method and device for a multi-tailpipe pulsation burner Background technique [0002] Pulse combustion is a high-efficiency, energy-saving and low-pollution combustion technology. When the pulsating burner is running, it will emit a loud noise. The pulsating airflow in the combustion chamber is the main noise source. At the same time, the pulsating combustion has a high coupling. When the acoustic conditions of the tail change, it will inevitably affect the operating characteristics of the pulsating burner. influences. To control combustion noise and random fluctuations in tail acoustic conditions, a decoupling chamber is necessary. The function of the decoupling chamber is to make the airflow flow smoothly and reduce the combustion noise. Because the noise intensity is closely related to turbulence, it changes with the Reynolds number. In addition, another more important function is to keep the tailpipe outlet pr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F23N5/00
Inventor 翟明董芃徐艳英夏新林
Owner HARBIN INST OF TECH
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