Alloy Steel Boiler Membrane Waterwall Panel For Power Station

The membrane water-cooled wall is to weld many rolled water-cooled wall fin tubes together with spot welding, so that it becomes a sealed combined heating surface, which can not only improve the air tightness of the furnace, reduce air leakage, but also better protect the furnace wall, reduce the weight of the furnace wall and simplify the structure. These advantages of membrane water wall make it generally used in large boilers of power stations. The function of the water wall is to absorb the radiant heat of the high-temperature flame or flue gas in the furnace, generate steam or hot water in the tube, and reduce the temperature of the furnace wall to protect the furnace wall.

classification

According to the structural type, there are three main types: plain tube type, membrane type and squeaked tube type.

The plain tube water wall is composed of a whole row of seamless steel pipes, and their structure is the simplest; the membrane water wall weld many rolled water-cooled fin tubes together with spot welding, so that they become a sealed combined heating surface, which can not only improve the air tightness of the furnace, reduce air leakage, but also better protect the furnace wall, reduce the weight of the furnace wall, simplify the structure; the water wall of the spur tube is to weld many pins with a length of 20~25mm and a diameter of 6~12mm on the water-cooled wall tube, and then apply chrome ore refractory plastic in order to reduce the heat absorption of this part of the water wall and increase the temperature of the combustion zone, it is suitable for occasions where fuel ignition is particularly difficult or some liquid slag discharge furnaces.

According to the layout part, there are two kinds of attached wall type and partition wall type (i.e., double-sided heating) water cooling wall.

The former is mostly partially embedded in the inner wall of the furnace wall and absorbs heat on one side, while the latter is mostly installed in the middle of the furnace chamber of a large boiler, separating the whole furnace into two independent parts that are heated on both sides.

Functions