Title:
【発明の名称】窒素酸化物低減のための段階的燃焼
Document Type and Number:
Japanese Patent JP3017048
Kind Code:
B2
Abstract:
A combustion method is provided for carrying out combustion with reduced generation of nitrogen oxides. The combustion method involves partially combusting a fluid fuel stream with a low velocity oxidant and thereafter mixing and combusting the resulting product with a secondary oxidant stream diluted with ambient gas. The velocity of the secondary oxidant stream is either increased to reduce the nitrogen oxides emission level or adjusted to provide the desired secondary oxidant/low velocity oxidant ratio which is useful for further decreasing the formation of nitrogen oxides. Normally, increasing the ratio and/or velocity further decreases the nitrogen oxides emission level. When liquid fuel is employed, it is atomized with atomizing fluid in such a manner to produce a liquid fuel stream having a very narrow spray angle. The production of such a stream allows the burner to be operated without water cooling. Moreover, such a stream, when combined with the above combustion method, unexpectedly provides effective and efficient combustion with reduced generation of nitrogen oxides.
Inventors:
William Tea Kobayashi
Arthur W Francis Jr.
Hisako Kobayashi
Arthur W Francis Jr.
Hisako Kobayashi
Application Number:
JP16782995A
Publication Date:
March 06, 2000
Filing Date:
June 12, 1995
Export Citation:
Assignee:
Praxair Technology Incorporated
International Classes:
F23C1/00; F23C6/04; F23C99/00; F23D11/10; F23L1/00; F23D11/38; F23L7/00; (IPC1-7): F23D11/38; F23C11/00; F23D11/10; F23L1/00
Domestic Patent References:
| JP6214048B2 |
Attorney, Agent or Firm:
Motohiro Kurauchi (1 outside)