Supercritical once-through boiler water-coal ratio modelling and character study

Author

Tao Liu ; Jizhen Liu ; Heng Zhang ; You Lv

Author_Institution

State Key Lab. for Alternate Electr. Power Syst. with Renewable Energy Sources, North China Electr. Power Univ., Beijing, China

fYear

2015

fDate

23-25 May 2015

Firstpage

25

Lastpage

30

Abstract

The supercritical once-through boiler is a complex system with the characteristics of strong coupling, non-linearity and multiple parameters. Quick and accurate acquisition of its water-coal ratio is the guarantee of the boiler´s safe, economic and stable operation. The turbine heat rate calculation method based on unit operation data was introduced in this paper. Then by the matter and energy conservation, the water-coal ratio calculation model was derived from the relation between water-coal ratio and heat rate. Finally, taking a certain 600MW coal-fired unit as example, the water-coal ratio under rated conditions were calculated by the put forward model. The result is indicated that the model is efficiency and reasonable from theoretical analysis and practical application. The obtained water-coal ratio character is of great significance for supercritical once-through boiler control improvement.

Keywords

boilers; coal; energy conservation; gas turbines; large-scale systems; coal-fired unit; complex system; economic operation; energy conservation; power 600 MW; safe operation; stable operation; supercritical once-through boiler; turbine heat rate calculation; unit operation data; water-coal ratio; Boilers; Coal; Feeds; Turbines; Water conservation; Water heating; Character study; Heat rate; Supercritical once-through boiler; Water-coal ratio;

fLanguage

English

Publisher

ieee

Conference_Titel

Control and Decision Conference (CCDC), 2015 27th Chinese

Conference_Location

Qingdao

Print_ISBN

978-1-4799-7016-2

Type

conf

DOI

10.1109/CCDC.2015.7161661

Filename

7161661