1. Membrane- type water-cooling wall closely surround the hearth and fully protect the boiler wall, therefore it is only required to lay the heat insulation materials on the boiler wall and the refractory materials are not required, thus simplifying the boiler wall structure and reduce the quality of the boiler. 

2. The good sealing of hearth and less air leakage can reduce the heat loss of the exhaust fume and improve the boiler thermal efficiency.

3. It can be quickly and conveniently installed. 

4. The tensile strength of membrane-type wall is higher, so the combustion chamber of diaphragm wall can be in suspension structure, which is very helpful to the overall structure of thermal expansion of large-size boiler.