Title:
FLUE GAS CIRCULATION SYSTEM FOR IMPROVING COMBUSTION CHARACTERISTICS AND THERMAL CHARACTERISTICS OF PULVERIZED COAL FIRED BOILER
Document Type and Number:
WIPO Patent Application WO/2023/202634
Kind Code:
A1
Abstract:
Disclosed in the present application is a flue gas circulation system for improving combustion characteristics and thermal characteristics of a pulverized coal fired boiler. The flue gas circulation system comprises a plurality of circulation flue gas leading-out ports provided in a hearth outlet flue of a boiler, wherein the circulation flue gas leading-out ports are connected to a circulation flue gas leading-out main pipe by means of a circulation flue gas leading-out pipeline; the circulation flue gas leading-out main pipe is connected to a circulation flue gas leading-in main pipe; the circulation flue gas leading-in main pipe is connected to a circulation flue gas leading-in pipeline; and the circulation flue gas leading-in pipeline is connected to a hearth. Flue gas in a flue is introduced into the hearth through the circulation flue gas leading-out ports, thereby achieving flue gas circulation; and at the same time, the problems such as slagging or overtemperature of a heated face of a pulverized coal fired boiler of a power station, high-temperature corrosion of a water-cooled wall, burning loss of a combustor, incapability of reaching a design value of steam temperature, and high concentration of nitrogen oxides at an outlet of the hearth can be solved or ameliorated.
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Inventors:
ZHANG YUBO (CN)
ZHANG LIANGPING (CN)
WANG CHUNCHANG (CN)
YANG HUI (CN)
LIU CHAO (CN)
SHEN ZHI (CN)
ZHANG HAILONG (CN)
FU LONGLONG (CN)
DANG LIJUN (CN)
ZHANG LIANGPING (CN)
WANG CHUNCHANG (CN)
YANG HUI (CN)
LIU CHAO (CN)
SHEN ZHI (CN)
ZHANG HAILONG (CN)
FU LONGLONG (CN)
DANG LIJUN (CN)
Application Number:
PCT/CN2023/089274
Publication Date:
October 26, 2023
Filing Date:
April 19, 2023
Export Citation:
Assignee:
XIAN THERMAL POWER RES INST CO (CN)
International Classes:
F23B80/02; F23C9/08; F23C9/00; F23C9/06
Foreign References:
| CN114659099A | 2022-06-24 | |||
| CN105605555A | 2016-05-25 | |||
| CN205504960U | 2016-08-24 | |||
| CN111256162A | 2020-06-09 | |||
| CN112797433A | 2021-05-14 | |||
| CN112097250A | 2020-12-18 | |||
| CN213453608U | 2021-06-15 | |||
| CN106969346A | 2017-07-21 | |||
| JP3230564U | 2021-02-04 | |||
| US20100263577A1 | 2010-10-21 |
Attorney, Agent or Firm:
SUNSHINE INTELLECTUAL PROPERTY INTERNATIONAL CO., LTD. (CN)
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