公开(公告)号：JPH0914604A

公开(公告)日：1997-01-17

申请号：JP14600596

申请日：1996-06-07

Applicant: ABB RESEARCH LTD

Inventor： KURAUSU DETSUBERINGU ,  DEIITAA BUINKURAA ,  BUORUFUGANGU POORIFUKE ,  TOOMASU ZATSUTERUMAIAA

IPC: F23R3/34 ,  F23C6/04 ,  F23C99/00 ,  F23C11/00

Abstract: PROBLEM TO BE SOLVED: To provide the operating method of a device equipped with a stage type combustion system, minimizing the discharge of poisonous substances such as NOx especially. SOLUTION: A primary combustion stage 1 is operated by fuel/air mixture 3 having a percentage of excess air, which is larger than that of the whole of combustion device, while high-temperature combustion gas 5 from the primary combustion stage 1 is mixed into fuel/air mixture 4 having a percentage of excess air, which is smaller than that of whole of the combustion device.

公开(公告)号：JPH09178126A

公开(公告)日：1997-07-11

申请号：JP32189996

申请日：1996-12-02

Applicant: ABB RESEARCH LTD

Inventor： KURAUSU DETSUBERINGU ,  ADONAN EROGURU ,  HANSU PEETAA KUNEPUFUERU ,  BUORUFUGANGU POORIFUKE ,  DEIITAA BUINKURAA

IPC: F23C7/00 ,  F23D11/40 ,  F23D14/62 ,  F23D17/00

Abstract: PROBLEM TO BE SOLVED: To improve mixing characteristics and eliminate the risk of production of back fire over the entire operation. SOLUTION: A premixing burner is adapted such that it includes an internal chamber 20 for stabilizing a turning flow, which chamber includes an inner body 13 extending conically in a flow direction of the turning flow, and an outer cover of which chamber is interrupted by a least one air inflow slit arranged tangentially in the longitudinal extending direction for the flow of a combustion medium 15 into the internal chamber 20. In the premixing chamber, supply passages 11c, 12c extend on the upstream side of tangential air inflow slits 11a, 12a, which include a means for producing an eddy on an air stream 23 and a means for introducing a fuel 24.