The key word of the ESP Boiler, which stands for Economizer Steam Package Boiler is energy-efficient; little or no fuel is used during the heating process. The main function of the Economizer, in conjunction with one or more coils upstream and several heat exchanger layers downstream used for preheating of feedwater, consists to perform this important task which was previously done by boilers themselves. To complete combustion, so that no raw fuel and air perfect mixing is necessary as well as low NOX emissions levels. The other technological features of the ESP Boiler Centre on there is a favorable layout which saves space; an economizer maximizing heat transfer efficiency; integrated flue will consumption for fuel along with the burner; CIS control system or common integrated structure and operations instrument for precise running quality. In terms of differential costs, this makes the whole package more competitive (Yuan, 1990). Another component is the entire control system: whole steam temperature regulation, acid oil inject afore Darco plant for protection from corrosion and so on. With these features we believe that ESP boilers will meet industrial applications which are usually outside Western Europe or America--their owner and manufacturer.