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蒸汽动力系统可调节性分析线切割机床

门把五金网 2021-03-15 13:41:31

蒸汽动力系统可调节性分析

中图分类号:TK269 文献标识码:A

文章编号:2222-226223-2226-23An Analysis of the Regulation Possibility of Steam Power Systems He Ate Feng Xiao

Sui Xinha Gao Wuxia

A constant change of situations in a factory demands that a steam power system should lend itself to be readily regulated within certain limits. With general composite curves serving as a tool this paper makes an analytical comparison of the steam power systems using respectively a back-pressure steam turbine unit and an extraction condensing steam turbine unit. Furthermore, a specific example is used to explain how to design a steam power system featuring a good regulation possibility with the help of the general composite curves.

Key words: steam power system, regulation possibility, general composite curves, steam turbine蒸汽动力系统是石化企业的重要组成部分,它消耗燃料,为整个生产过程提供蒸汽、电力、冷却水等公用工程。蒸汽动力系统是否合理,直接决定企业的能耗水平。同时,由于企业生产中存在波动,产品品种变化及季节不同,必然引起公用工程量的变化,相应的蒸汽动力系统能否适应所发生的变化,是否具有可调节性,将决定企业的产品成本、经济效益和能源利用程度。在我国,大部分石化厂的蒸汽动力系统,采用背压式汽轮机组或抽汽背压式汽轮机组,接机泵或发电机组,产生的背压蒸汽用于工艺或生活热用户。背压机组由于没有凝汽器中的冷端损失,在经济上是优越的,对蒸汽的利用率比较高,但背压机组存在不能同时满足热用户和输出功率需要的缺陷,制约了整个蒸汽动力系统的可调节性。

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