The uer actively responded to the environmental protection policy and introduced a number of ZOZEN WNS gas boilers to replace the original coal water slurry boilers. WNS gas boiler adopts low nitrogen burner, which can effectively reduce pollutant emissions. In order to improve the energy efficiency of the system, ZOZEN gas boiler also uses energy-saving condensation technology to reduce the heat loss of exhaust gas, and it can run stably and safely for a long time, ensuring its steam production and sales.