1. Diffusion burner
Definition: A burner designed according to the diffusion combustion method
Classification: Power for air supply required for combustion
Natural induced draft type: relying on natural draft and supplying air by diffusion, it is mostly used for civilian diffusion burners.
Forced blast type: rely on the blower to supply air, mostly used in industry-blast burner
2. Features:
Simple structure, easy to manufacture
Combustion is stable and will not flash back; ignition is easy and adjustment is convenient. Low-pressure gas (200~400Pa or lower) can be used, and there is no need for blowing and no power consumption.
The combustion heat intensity is low, the flame is long, and a large combustion chamber is required.
In order to complete the combustion, more excess air must be supplied (a = 1.21.6); the combustion temperature is low, and the heat loss of exhaust smoke is large.
3. Application scope
Suitable for: occasions where the temperature is required to be uniform, not high, and the flame stable.
Such as: small heating boiler igniter, temporary heating equipment.
4. Classification
The gas flow state is divided into: laminar flow and turbulent flow diffusion burner Laminar flow diffusion burner: generally not suitable for natural gas and liquefied petroleum gas - the combustion speed of gas is slow, and it is easy to produce incomplete combustion and soot.
5. Design calculation
Purpose: Diameter, number and spacing of fixed fire holes: required gas pressure before the burner
Basics: Momentum Theorem, Continuity Equation, Flame Stability