一、前言养护坑法系建筑业目前广泛用于生产混凝土制品的主要养护工艺之一。它具有构造简单,基建投资少、上马快及生产适应性强等优点;所以到目前为止国内外在混凝土制品厂中这种养护坑设备所占的比例很大。但是旧坑窑存在三大缺陷:一是养护周期长,一般在13个小时以上,二是蒸汽耗量大,一般每立米构件单方耗汽在400公斤以上,三 I. INTRODUCTION The conservation pit method is one of the major maintenance techniques currently widely used in the production of concrete products in the construction industry. It has the advantages of simple structure, less investment in infrastructure, quick start-up, and strong adaptability to production; so far, the proportion of such equipment for the conservation of pits in concrete products plants at home and abroad accounts for a large proportion. However, the old pit kiln has three major defects: First, the maintenance cycle is long, usually more than 13 hours, and second, the steam consumption is large. Generally, the unilateral steam consumption per cubic meter is more than 400 kg.