The single drum horizontal steam and hot water boiler produced by Shenyang Tsinghua Boiler Co., Ltd. is designed under the guidance of industry experts based on reference to similar products at home and abroad. The overall structure is a π - shaped arrangement, layered combustion, and the steam boiler adopts natural circulation. The hot water boiler has a forced water circulation system. The products include 29MW, 46MW, 58MW, 70MW, 91MW, and 116MW.