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利用300℃左右的废气发电时,从经济方面考虑,使用通常的蒸气透平是难以实现的。采用氟利昂等低沸点介质,也存在介质的高温劣化、轴承泄漏等方面的问题。为了解决这些问题,设想了用耐热性优良的中间介质油从废气中回收热量,使中间介质油和氟利昂液体直接接触而交换热量,产生氟利昂蒸气,推动透平发电的装置。由于这种装置采用了两种流体循环的方式,既扩大了可以回收的废气的温度范围,又能够使氟利昂蒸气的工作温度由以前的120℃左右提高到140-160℃。本文对实现这些过程的介质选择情况、
When electricity is generated from exhaust gas at about 300 ° C, it is economically impossible to use a conventional steam turbine. The use of freon and other low boiling point media, there are also media degradation at high temperature, bearing leakage and other issues. In order to solve these problems, a device has been conceived to recover heat from the exhaust gas by using an intermediate oil having excellent heat resistance, to exchange heat between the intermediate oil and freon liquid, to generate freon vapor, and to promote turbine power generation. Because of the two fluid circulation methods, this device not only expands the temperature range of the exhaust gas that can be recovered, but also increases the working temperature of Freon vapor from the previous 120 ° C to 140-160 ° C. This article to achieve these processes medium choice,