Retrofit of Heating Surfaces for DG2070/17.5-Ⅱ6 Type Boiler

doi:10.11930/j.issn.1004-9649.2012.11.32.3

Abstract

Abstract: To decrease the extra large amount of desuperheating water in the superheaters and reheaters of the subcritical natural-circulating boiler of the Model DG2070/17.5-Ⅱ6 which severely affects the security and economics of the unit, a feasible plan is put forward based on the analysis on the structural characteristics of the heat recovery surfaces, which includes reducing the heating area of the low-temperature superheaters and the low-temperature reheaters, and increasing the heating area of the economizer adequately. The plan is put into practice at a power plant, which indicates that the amount of the desuperheating water in the superheaters and the reheaters is decreased by a big margin with the security and economics of the boilers being improved.

Key words: thermal power unit, superheater, reheater, heating surface retrofit

CLC Number:

TK223.3

FANG Zhan-ling. Retrofit of Heating Surfaces for DG2070/17.5-Ⅱ6 Type Boiler[J]. Electric Power, 2012, 45(11): 32-35.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.2012.11.32.3

https://www.electricpower.com.cn/EN/Y2012/V45/I11/32

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