热力透平2024，Vol.53Issue(2)：108-112,5.DOI:10.13707/j.cnki.31-1922/th.2024.02.009
抽凝改背压机组汽水系统方案设计与对比分析
Comparison Analysis on Renovation Schemes of Steam-Water System in Transforming Extraction Condensing Unit into Back Pressure Unit
吴云丹 1倪峰1
作者信息
- 1. 上海汽轮机厂有限公司,上海 200240
- 折叠
摘要
Abstract
The 60 MW extraction condensing unit with single cylinder made by Shanghai Turbine Plant needs to be transformed into 30 MW back pressure unit.The sealing systems of extraction condensing unit and back pressure unit are completely different.The former system consists of steam supply and leakage components,while the latter is only for steam leakage.The renovation schemes of steam-water system in this project were presented.Under the principle of retaining the original unit equipment to the maximum extent,with the auxiliary system included,the reform of the sealing and water drainage system was carried out,during which the pressure and pipeline direction of each joint were made to match the original unit as much as possible.Because the steam extraction was cancelled,and the rear half cylinder behind the blocker would operate with bare rotor,the water drainage point and system configuration should be redesigned.Two renovation schemes of sealing system were proposed,one was to plug part of the steam leakage chamber and retain the external two leakage pipelines,the other was to utilize the original steam leakage pipelines to optimize the seal leakage arrangement so as to meet the requirement of back pressure unit.Comparison was carried out between the two schemes with the standard of the impact on unit performance and the convenience of configuration,and it was determined that the latter was the optimal scheme.The research results can provide reference for the design of steam-water system in similar reform projects.关键词
抽汽凝汽式机组/背压式机组/汽封系统/疏水系统Key words
extraction condensing unit/back pressure unit/sealing system/drainage system分类
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吴云丹,倪峰..抽凝改背压机组汽水系统方案设计与对比分析[J].热力透平,2024,53(2):108-112,5.
