定期/连续排污扩容器是与锅炉的定期/连续排污口连接的，是用来对锅炉的定期/连续排污进行减压扩容，使排污水在定期/连续排污膨胀器内绝热膨胀分离为二次蒸汽和废热水。排污水在扩容器内经扩容、降压、热量交换，产生的废热水被排放，产生的二次蒸汽由专门的管道引出。定期/连续排污量随锅炉给水负荷变化自动调节，保持相对稳定的排污率。

The periodic/continuous blowdown expansion container is connected with the periodic/continuous blowdown outlet of the boiler. It is used to decompress and expand the periodic/continuous blowdown of the boiler, so that the the blowdown water in the periodic/continuous blowdown expander can be separated into secondary steam and waste hot water. The waste hot water is discharged after expansion, pressure reduction and heat exchange in the expanded container, and the secondary steam is drawn out by a special pipe. Continuous sewage discharge can be adjusted automatically with the change of boiler feed water load to maintain a relatively stable sewage discharge rate.