Title:
WATER WALL OF SUPERCRITICAL CIRCULATING FLUIDIZED BED BOILER HAVING HIGH FLOW STABILITY AT LOW LOAD, AND METHOD OF REALIZING LOW MASS FLOW RATE
Document Type and Number:
WIPO Patent Application WO/2017/088742
Kind Code:
A1
Abstract:
A water wall of a supercritical circulating fluidized bed boiler having high flow stability at a low load, and method of providing a low mass flow rate. The circulating fluidized bed boiler comprises a surrounding water wall (11) and a mid-partition water wall (17) of a furnace (1) having a low mass flow rate, and a working medium flows in the surrounding water wall (11) and the mid-partition water wall (17) connected in parallel. Tubes of the surrounding water wall (11) and the mid-partition water wall (17) have a greater inner diameter at locations having a steam content greater than 50% than locations having a steam content less than 50%, and the portion of the tubes having the greater inner diameter has a cross section area 1.05-3 times of a cross section area of the portion of the tubes having the smaller inner diameter. The water wall of the supercritical circulating fluidized bed boiler realizes a low mass flow rate, and addresses the problems of an increased water wall area and furnace height when the mass flow rate is low. In addition, the water wall of the supercritical circulating fluidized bed boiler addresses the problem of lower flow stability at a low load, thus preventing a negative feedback from happening in a water wall system.
Inventors:
XU PENG (CN)
HU XIUKUI (CN)
GONG LIMING (CN)
CHEN ZHENYU (CN)
SU HU (CN)
YANG XUEFEN (CN)
XUE DAYONG (CN)
NIE LI (CN)
XUE YANHUI (CN)
WANG PENG (CN)
HU XIUKUI (CN)
GONG LIMING (CN)
CHEN ZHENYU (CN)
SU HU (CN)
YANG XUEFEN (CN)
XUE DAYONG (CN)
NIE LI (CN)
XUE YANHUI (CN)
WANG PENG (CN)
Application Number:
PCT/CN2016/106838
Publication Date:
June 01, 2017
Filing Date:
November 23, 2016
Export Citation:
Assignee:
DONGFANG BOILER GROUP CO LTD (CN)
International Classes:
F22B37/10
Foreign References:
| CN105299634A | 2016-02-03 | |||
| CN103353104A | 2013-10-16 | |||
| CN204063017U | 2014-12-31 | |||
| US2962005A | 1960-11-29 | |||
| US3288117A | 1966-11-29 | |||
| US3301224A | 1967-01-31 | |||
| DE3028240A1 | 1981-02-05 |
Attorney, Agent or Firm:
CHENGDU JIUDINGTIANYUAN INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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