High Efficient ASME Standard Boiler Water Wall Panels , Water Wall Tubes In Boiler

High Efficient ASME Standard Boiler Water Wall Panels , Water Wall Tubes In Boiler

Water wall panels Description

Usually laid vertically on the inner surface of the furnace wall, it is mainly used to absorb the radiant heat from the flame and high-temperature flue gas in the furnace.It is the main type of evaporative heating surface of modern boiler and also the basic part of water circulation loop of boiler.Due to both cooling and protective furnace wall role, hence the name.

The water-cooling walls were originally designed not to be heated, but to cool the furnace so that it would not be damaged at high temperatures.Later, as a result of its good heat exchange function, gradually replaced the drum to become the main heating parts of the boiler.

An evaporative heating surface composed of many parallel pipes is arranged on the inner wall of the boiler furnace.The role 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 pipe, reduce the temperature of the furnace wall, and protect the furnace wall.In the large capacity boiler, the flame temperature is very high and the intensity of thermal radiation is very high.The boiler contains 40 to 50 percent or more of the heat absorbed by the water wall.With the exception of a few small capacity boilers, modern water tube boilers use water cooling walls as the main evaporative heating surface.

Parameter

Types

Light-pipe water wall

The water wall of light pipe is made up of general boiler steel pipe.Widely used in small and medium capacity boilers.The tightness degree of water-cooling wall arrangement is measured by the ratio (s/d) between the spacing s of the pipe and the outer diameter d of the pipe.Boiler capacity is small, s/d is large (1.5 ~ 2), metal utilization rate is high, and the protective performance of furnace wall is poor, and heavy furnace wall is usually built with firebrick.As the boiler capacity increases, s/d decreases (1.1 ~ 1.2), metal utilization rate is low, and light furnace wall can be adopted.When s/d<1.1, the pipe wall can be used.The manufacturing process of light-pipe water-cooling wall is simple and does not require large mechanized equipment. However, the sealing of boiler is poor, the structure of furnace wall is complex and construction is difficult, and the structure of supporting crane is also complex.

Membrane water wall

An air-tight structure of a membrane water wall welded by pipes and fins.Advantages: less air leakage in furnace;The pipe wall can be adopted to reduce the load of steel structure and reduce the cost of boiler.It is convenient to use the suspended structure and improve the thermal expansion system.Suitable for large mechanized production, high assembling rate;Small capacity of heat storage, shortening start and stop time.The drawback is that the manufacturing process is more complex.Large capacity, high - temperature and high - pressure boilers use membrane water wall.

Application

Boiler water walls are membrane walls that are made of tubes welded together with or without a strip of metal in between. These walls form the enclosure of the coal combustion chamber. Water wall tubes are also referred to as the evaporator section; they contain water mostly in liquid form which gradually evaporates as it rises in the boiler.

Warranty

1. One year warranty
2. Spare parts available at ex-factory price
3. Different voltage available
4. 100% tested before delivery
5.  Assist clients to prepare for the first construction, and also can arrange engineer onsite instruction of installation and commissioning
6. Train the first-line operators;
7. Examine the equipment;
 

Certification