介绍了空气预冷系统的不同流程以及喷淋式、 塔板式、 填料式冷却塔，分析了其优缺点；
The paper describes the different processes relating to air precooling systems and cooling towers of spray type, perforated plate type and packed type with their advantages and deficiencies analyzed.
与此相反的是，板式塔技术又有了明显的进步。
On the contrary, the technology of plant column has obvious progress.
就当前扩产增容中塔设备设计和改造时板式塔和填料塔的选型问题加以分析。
Analysis for type selections of plate columns and packed columns in the design of the columns during revamp and expansion of the plant.
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