The WNS gas-fired steam boiler adopts the design of the large furnace and the full-wave furnace, and matches the flame of the reasonable low-ammonia burner. Fully reduce the combustion temperature in the high temperature zone of the furnace flame, effectively control the increase of NOx concentration, and meet the requirements of low nitrogen emission. The fire tube gas boilers adopts the principle of spiral heat transfer calculation and spiral disturbance design. Through 3D animation simulation, the design heat transfer resistance is small. The threaded smoke pipe adopts seamless steel pipe, which has good heat transfer, low friction resistance and long service life.

Fire tube gas steam boiler is equipped with FGR flue gas external circulation configuration. It can meet the 30mg low ammonia burner emission standard. Equipped with Siemens solenoid valve to control the recirculation of flue gas flow according to the combustion conditions of the burner itself, and the magnification rate can reach the ideal low nitrogen emission below 30mq. A built-in condenser is provided at the rear of the fire tube steam boiler. All parts are laser-cut and cold-worked. The sealing plate is made of ND steel, and the spiral fin tube with low temperature corrosion resistance is selected. In the limited space, the heat transfer area is increased, the tail flue gas is fully absorbed, the exhaust gas temperature is reduced, and the thermal efficiency of the boiler is improved.

The structure of the fire tube gas boilers is a built-in type, which can not occupy the space area of ​​the boiler room and has a wide range of applications. The design concept of the front smoke box of this series of steam boilers adopts a double-layer double-set built-in labyrinth thermal insulation layer and a heat-resistant layer two-layer structure, which has good thermal insulation performance. In addition, the smoke box panel and smoke box cover are made of the overall Q245R boiler steel plate, and the blanking of the steel plate adopts laser numerical control cutting technology. The deformation amount is small, the assembly precision is high, and the welding forming is good. Mainly, it is easy to open and tightly sealed, which is convenient for users to repair and maintain.

During the normal start-up cycle of the gas boiler, the operator must pay attention to whether the start-up process of the burner is normal. After the burner is ignited normally, it is necessary to observe whether the flame is normal and whether there is any abnormal sound. After the burner is ignited and operated normally, the operator should pay attention to observe that the water level of the boiler drum is normal, the steam pressure is stable, and the combustion condition is good. When the gas-fired steam boiler enters the normal operation stage, the boiler stoker should strengthen the boiler body, safety accessories, instruments and ancillary equipment, conscientiously do a good job of patrol inspection of the boiler and ancillary equipment, and fill in the operation records in time.

Fire tube gas boilers are efficient and energy-saving, and have good environmental protection effects. In the boiler flue gas, some harmful components such as CO2, NOX, SO2 are dissolved in the condensed water, which effectively reduces the emission of air pollutants. At the same time, large-scale furnace structure and flue gas recirculation technology are adopted. For gas boilers, ultra-low nitrogen emissions can be achieved, and NOX emissions are less than or equal to 30mg/Nm3, which fully meets the increasingly stringent national environmental protection requirements.