本文通过对减温减压器成垢原因的分析，并根据各种酸的不同化学特性，提出了混合酸是清洗减温减压器积垢的最有效方法。
In this paper, by analysis of temperature and pressure reducers' scale and according to different acids' chemical properties, mixed-acid is effective mostly for cleaning is put forward.
背压汽轮机和减温减压器都可以用于用汽系统，提供不同等级的蒸汽。
The exergy loss of primary steam after temperature and pressure reduction is calculated.
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