Water wall function of boiler
Water wall function:
·Absorbs the heat of the flame in the grate. Due to the high temperature in the furnace and the low smoke velocity, this heat absorption is mainly through radiation. The temperature of the flue gas is cooled to a sufficiently low level at the exit of the furnace larg.
·Protect the furnace wall. Due to the existence of the water wall, the flame can only partially or completely not touch the furnace wall, thus playing a protective role.
Light pipe and membrane
*The light tube water wall is a row of light tubes arranged on the inner side of the furnace wall connected by the drum and the header
*Membrane water wall is a tube panel welded by sheets or flat steel between the light tubes。
Light tube water wall - widely used in small boilers
Advantages : Easy to manufacture and install
Disadvantages: The effect of protecting the furnace wall is small, and the furnace has serious air leakage. Membrane water wall-widely used in medium and large boilers
Advantages: Reduce air leakage in the furnace, and light furnace walls can be used. Sometimes micro-positive pressure combustion can also be used to improve boiler efficiency. The factory is pre-assembled before leaving the factory, which can shorten the installation cycle and ensure the quality.
Slag tube
When the water-cooled wall tubes of the rear wall pass through the flue at the outlet of the furnace sill, due to the small horizontal pitch of the tubes, the tube rows are denser. pipe transverse pitch