After the fuel is atomized by the burner, the formed torch is filled into the full wave furnace and transmits radiant heat through the furnace wall. This is the first return trip. The high-temperature flue gas generated by the combustion converges in the return combustion chamber and becomes the second return passage, that is, the area with the tobacco tube bundle. After convective heat exchange, the flue gas temperature gradually decreases to the front smoke box, where it becomes the third return, that is, the tube bundle area of the light pipe, and then flows into the chimney through the rear smoke box, and is finally discharged into the atmosphere. This series of products have the characteristics of safety, reliability, high efficiency, energy saving, environmental protection, convenient maintenance, durability, automatic intelligent control, etc., and the whole process of boiler steam and water.

The economic operation of the boiler is one of the main issues that enterprises pay attention to. This not only involves the economic interests of enterprises, but also has important significance for energy conservation and sustainable and coordinated development in today's increasingly scarce energy sources. Exhaust gas temperature is one of the indicators to measure whether the boiler is in an economical operation state (calculated according to the relevant formula, the thermal efficiency of the boiler will decrease by about 1% for every increase of 10-15°C).

The main body of WNS series gas boiler adopts large-caliber corrugated furnace and wet back structure. According to different flue gas flow rates, select suitable heat transfer elements to achieve high efficiency, low back pressure and ultra-low NOx emissions. The front and rear smoke boxes are designed with shaft sleeve hinged doors, which have good sealing effect, light structure and convenient opening and closing. It can be operated by one person during the annual boiler inspection and maintenance.