Title:
DRY LOW-NITROGEN STAGED COMBUSTION SYSTEM BASED ON ISOLATING N2 FROM THE DIFFUSION COMBUSTION FLAME SURFACE
Document Type and Number:
WIPO Patent Application WO/2021/203583
Kind Code:
A1
Abstract:
A dry low-nitrogen staged combustion system based on isolating N 2 from the diffusion combustion flame surface, comprising a combustion chamber (19) as well as a purge gas passage (18), a diffusion combustion fuel passage (14), a primary diffusion combustion isolation gas passage (17), a premixed combustion fuel passage (9), and a premixed combustion air passage (3) that are communicated with the combustion chamber (19) and arranged in sequence from the inside to the outside, wherein a premixing passage swirler (4) is disposed in the premixed combustion air passage (3), the premixed combustion fuel passage (9) is communicated with a premixing cavity (6) by means of the premixing passage swirler (4), the primary diffusion combustion isolation gas passage (17) is branched into two paths at the downstream of a premixed combustion fuel passage closing partition (10), one of the paths being a primary diffusion combustion isolation gas passage (15), and the other being a secondary diffusion combustion isolation gas passage (16) connected to the primary diffusion combustion isolation gas passage (15) by means of openings, and a diffusion combustion fuel swirler (13) is provided at the tail end of the diffusion combustion fuel passage (14). The system can isolate the N2 in the premixed combustion air from the diffusion combustion flame surface, reduce NOx emissions, and solve the problem of instability of lean-burn premixed combustion of existing gas turbines.
Inventors:
XIAO JUNFENG (CN)
LI XIAOFENG (CN)
GAO SONG (CN)
WANG FENG (CN)
WANG WEI (CN)
XIA LIN (CN)
HU MENGQI (CN)
LI XIAOFENG (CN)
GAO SONG (CN)
WANG FENG (CN)
WANG WEI (CN)
XIA LIN (CN)
HU MENGQI (CN)
Application Number:
PCT/CN2020/104845
Publication Date:
October 14, 2021
Filing Date:
July 27, 2020
Export Citation:
Assignee:
XIAN THERMAL POWER RES INST CO (CN)
International Classes:
F23R3/38; F23D14/02; F23D14/20
Domestic Patent References:
| WO1990004740A1 | 1990-05-03 |
Foreign References:
| CN111322636A | 2020-06-23 | |||
| CN108332234A | 2018-07-27 | |||
| KR101586156B1 | 2016-01-18 |
Attorney, Agent or Firm:
XI'AN TONG DA PATENT AGENCY CO., LTD. (CN)
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