公开(公告)号：US20210333018A1

公开(公告)日：2021-10-28

申请号：US16335676

申请日：2017-11-30

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Shengen Zhang ,  Bolin Zhang ,  Bo Liu ,  Lin Li

IPC: F24H9/20 ,  F23C9/06 ,  F23L7/00 ,  F24H1/00 ,  F24H1/18

Abstract: A double chambers boiler system with oxygen-enriched combustion is provided, relating to fields of thermal power engineering and mechanical manufacturing. The double chambers boiler system includes a boiler furnace subassembly and a combustion control subassembly. The boiler furnace subassembly includes a combustion chamber and a heat exchange chamber. The heat exchange chamber is arranged above the combustion chamber. A high temperature flue gas outlet is arranged between the combustion chamber and the heat exchange chamber. The combustion control subassembly includes a burner, a pure oxygen injector and a fuel injector. The double chambers boiler system with oxygen-enriched combustion is able to simultaneously solve problems of improving a combustion efficiency and reducing an emission concentration of NOx.

公开(公告)号：US20210356118A1

公开(公告)日：2021-11-18

申请号：US16335677

申请日：2017-11-30

Applicant: UNIVERSITY OF SCIENCE AND TECHNOLOGY BEIJING

Inventor： Shengen Zhang ,  Lin Li ,  Bo Liu ,  Bolin Zhang

IPC: F23C5/32 ,  F23L7/00 ,  F23K3/02

Abstract: A pure oxygen combustion method with a low nitrogen source is provided, relating to a technical field of thermal engineering. The method includes steps of: adopting a low nitrogen fuel, and adopting pure oxygen as a combustion-supporting gas; separately transporting the pure oxygen and the low nitrogen fuel; controlling a ratio of the pure oxygen to the low nitrogen fuel; and combusting tangentially in the pure oxygen in a combustion chamber, so as to realize deep burnout of the low nitrogen fuel and decrease CO and NOx emission concentrations. The present invention realizes nitrogen source reduction before combustion, reduces NOx emissions, and increases a thermal energy conversion efficiency of the fuel, without a flue gas de-nitrification device. Therefore, a NOx emission concentration is 5-100 mg/m3, a CO emission concentration is 50-500 mg/m3, and a combustion efficiency of the fuel is beyond 95%.