There are mainly the following types of boiler water walls:
(1) Light tube type water wall;
(2) Membrane water wall;
(3) The inner wall of the spiral groove water wall;
(4) Pin-type water wall (also called barbed tube water wall). This water-cooled wall is welded with a certain length of round steel on the surface of the light pipe as required to facilitate the laying and fixing of refractory materials. Mainly used in the burner area of liquid slag furnaces, cyclone furnaces and some solid state slag furnaces.