Title:
BURNING HIGH-ALKALI COAL SLAGGING CONTAMINATION PREVENTION AND CONTROL METHOD BASED ON BOILER ZONE CONTROL
Document Type and Number:
WIPO Patent Application WO/2021/203678
Kind Code:
A1
Abstract:
A burning high-alkali coal slagging contamination prevention and control method based on boiler zone control. The method comprises the following steps: 1) the inside of a boiler is divided into a slagging zone, a severe contamination zone, a strong contamination zone, and a general contamination zone according to temperatures; 2) by reducing combustion chamber section thermal load and burner zone wall surface thermal load parameters, the slagging zone is controlled to be a zone from a burner to the over-fired air height, the range of the slagging zone is reduced, and a temperature window for alkali metal release is reduced; 3) by reducing combustion chamber volume thermal load parameters, the severe contamination zone is controlled to be a zone from over-fired air to a combustion chamber outlet, and a large quantity of alkali metal compounds is deposited in the severe contamination zone; 4) by means of reasonable heated surface arrangement, the strong contamination zone is controlled in a horizontal flue zone, and the contamination probability of the heated surface of a horizontal flue is reduced; and 5) by means of reasonable heated surface arrangement, the general contamination zone is controlled in a tail flue zone. The method provides technical support for design and safe operation of a newly-built fully-burnt high-alkali coal unit boiler.
Inventors:
YAO WEI (CN)
ZHANG XILAI (CN)
WANG ZHICHAO (CN)
ZHAO YONGGANG (CN)
BAI YANG (CN)
LIU JIALI (CN)
ZHANG XILAI (CN)
WANG ZHICHAO (CN)
ZHAO YONGGANG (CN)
BAI YANG (CN)
LIU JIALI (CN)
Application Number:
PCT/CN2020/123766
Publication Date:
October 14, 2021
Filing Date:
October 26, 2020
Export Citation:
Assignee:
XIAN THERMAL POWER RES INST CO (CN)
International Classes:
F23C3/00; F22B31/08; F23C5/08; F23J1/00; F23J3/02; F23J15/06; F23M5/08; F23N5/00
Foreign References:
| CN111442258A | 2020-07-24 | |||
| CN102635871A | 2012-08-15 | |||
| CN102425787A | 2012-04-25 | |||
| CN202769682U | 2013-03-06 | |||
| CN202769693U | 2013-03-06 | |||
| CN109210557A | 2019-01-15 | |||
| CN108592015A | 2018-09-28 | |||
| JP2015096790A | 2015-05-21 |
Attorney, Agent or Firm:
XI'AN TONG DA PATENT AGENCY CO., LTD. (CN)
Download PDF:
Previous Patent: CONTROL DISPLAY METHOD AND DISPLAY DEVICE
Next Patent: SLURRY WALL TRENCHING COMPREHENSIVE CONSTRUCTION METHOD FOR PIPELINES
Next Patent: SLURRY WALL TRENCHING COMPREHENSIVE CONSTRUCTION METHOD FOR PIPELINES