According to engineering design and practical experience, the author presents the unique characteristics, optimized layout and excellent piping design of TEAL metering unit in polypropylene plant.

结合工程设计实践经验，阐述聚丙烯装置烷基铝贮存单元所具有的独特性，从而达到优化布置和完善配管设计的目的。

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The layout, process flow and features of new ethylene recovery technology pilot plant are discussed in the article. The experience in engineering is also briefly stated.

介绍了中试装置的布置、工艺路线及特点，并简要总结了工程建设过程中的经验。

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