Title:
STAGED COMBUSTION METHOD WITH MULTIPLE INJECTIONS AND W-SHAPED FLAME BOILER DEVICE FOR CARRYING OUT THE SAME
Document Type and Number:
WIPO Patent Application WO/2011/130936
Kind Code:
A1
Abstract:
A staged combustion method with multiple injections and a W-shaped flame boiler device for carrying out the same are provided. The method includes: inner and outer secondary air with wind velocity of 35-65 m/s are stagedly injected, carrying dense pulverized coal with wind velocity of 10-20 m/s downwards, thereby a first-stage and second-stage combustion are achieved; under-arch secondary air with wind velocity of 35-65 m/s is injected from multiple under-arch secondary-air ports to the lower hearth, thereby a third-stage combustion is achieved. A W-shaped flame boiler device for carrying out the method includes dense pulverized coal flow nozzles (10), inner secondary air nozzles (11), lean pulverized coal flow nozzles (12) and outer secondary air nozzles (13) respectively arranged in the arch (3, 15) from the center (2-1) of the hearth to the front/ back water-cooled wall (2-2, 2-3) in turn, and multiple under-arch secondary air nozzles (14) arranged in the front and back walls of the lower hearth (1) in the width direction of the hearth. The W-shaped flame boiler device can substantially reduce the emission of NOx and decrease the content of fly ash combustible.
Inventors:
LI ZHENGQI (CN)
CHEN ZHICHAO (CN)
KUANG MIN (CN)
SUN RUI (CN)
ZHU QUNYI (CN)
ZENG LINGYAN (CN)
LIU CHUNLONG (CN)
SUN SHAOZENG (CN)
WU SHAOHUA (CN)
CHEN ZHICHAO (CN)
KUANG MIN (CN)
SUN RUI (CN)
ZHU QUNYI (CN)
ZENG LINGYAN (CN)
LIU CHUNLONG (CN)
SUN SHAOZENG (CN)
WU SHAOHUA (CN)
Application Number:
PCT/CN2010/073947
Publication Date:
October 27, 2011
Filing Date:
June 13, 2010
Export Citation:
Assignee:
HARBIN INSTITUIE OF TECHNOLOGY (CN)
LI ZHENGQI (CN)
CHEN ZHICHAO (CN)
KUANG MIN (CN)
SUN RUI (CN)
ZHU QUNYI (CN)
ZENG LINGYAN (CN)
LIU CHUNLONG (CN)
SUN SHAOZENG (CN)
WU SHAOHUA (CN)
LI ZHENGQI (CN)
CHEN ZHICHAO (CN)
KUANG MIN (CN)
SUN RUI (CN)
ZHU QUNYI (CN)
ZENG LINGYAN (CN)
LIU CHUNLONG (CN)
SUN SHAOZENG (CN)
WU SHAOHUA (CN)
International Classes:
F23C7/00; F23C5/08; F23L9/00
Foreign References:
| CN101666491A | 2010-03-10 | |||
| CN101368725A | 2009-02-18 | |||
| CN101694295A | 2010-04-14 | |||
| CN1851323A | 2006-10-25 | |||
| JPH0268403A | 1990-03-07 | |||
| US4381718A | 1983-05-03 |
Attorney, Agent or Firm:
HARBIN SONGHUAJIANG PATENT TRADEMARK OFFICE (CN)
哈尔滨市松花江专利商标事务所 (CN)
哈尔滨市松花江专利商标事务所 (CN)
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Claims: