公开(公告)号：JPH07225012A

公开(公告)日：1995-08-22

申请号：JP1958495

申请日：1995-02-07

Applicant: ABB RESEARCH LTD

Inventor： TOOMASU ZATSUTERUMAIYAA ,  PIITAA SHINIA

IPC: F23D14/74 ,  F23C9/00 ,  F23D14/22 ,  F23R3/02

Abstract: PURPOSE: To keep stable a flame surface and hence avoid a reverse flow of a flame into an inflow region and restrict emission of harmful matter, by disposing a conspicuous lateral cross section expansion portion on a transfer portion between the inflow region and a combustion region for guiding a flow cross section of the combustion region. CONSTITUTION: A self ignition combustor chiefly comprises an inflow region 1 and a combustion region 2 which are arranged in parallel with each other and have the same flow direction. Working gas 7 flowing into a spiral flow formation element 3 and a fuel 5 supplied from a fuel lance 4 cause properly self-ignition respectively, and the fuel 5 is injected from a fuel nozzle 6 and is then discharged as hot gas 10. Herein, there is disposed a sharp cross section expansion section 8 on the transfer section between the inflow region 1 and the combustion region 2 for guiding the flow cross section of the combustion region 2. The transverse expansion section 8 keeps stably a flame surface 9 and hence avoids a reverse flow of a flame from the combustion region 2 to the inflow region 1.

公开(公告)号：JPH07208710A

公开(公告)日：1995-08-11

申请号：JP21266894

申请日：1994-09-06

Applicant: ABB RESEARCH LTD

Inventor： KURAUSU DETSUBERINGU ,  HANSU PEETAA KUNEPUFUERU ,  TOOMASU ZATSUTERUMAIYAA

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

Abstract: PURPOSE: To secure a stable mixed combustion and a reduced NOx emission with a limited degree of turbulence by supplying a fuel in a range of a Venturi section acting above the internal chamber of a premixing burner to let the stream of combustion air pass through the Venturi section. CONSTITUTION: A fuel 31 is injected to a location to maximize the mixing speed of the stream 15 of combustion air with an inner chamber 14 of a premixing burner, namely, in the region of tangential air inlet slits 21 and 22. In the region, a Venturi mixer 32 is provided over the overall length of the premixing burner. The Venturi mixer 32 comprises a double path, namely, passages 33 and 34. The central Venturi body 35 simultaneously serves as fuel supply conduit. The Venturi body 35 is further provided with a nozzle 36 toward passages 33 and 34 on both sides. The passages 33 and 34 can develop a Venturi effect as other part bodies 37 and 38 adjoining them are formed in a Venturi likewise.