Flue gas turbine-expander set is important energy-saving equipment and also a critical set in the catalytic cracking unit.

烟气轮机组是催化裂化装置重要的节能设备，也是关键机组。

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Based on requirement of flue gas turbine-expander, the design principle of flue duct was proposed. The matters needing attention during design and construction were analyzed.

该文从烟气轮机对烟道的要求出发，提出了烟道的设计原则，分析了设计和施工中应注意的问题。

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In this paper, factors influencing the vibration of flue gas turbine-expander set is analyzed based on its operating features, and corresponding countermeasures are put forward.

根据烟气轮机组的运行特点，对影响烟气轮机组振动的因素作了分析，并提出了相应对策。

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