一、引言 我国的工业废热中,有相当一部分是150℃以下的工业排气废热。这些低温排气主要产生于轻纺工业系统如纺织、印染、造纸、木材干燥,粮食和食品烘干等行业。在我国,这些行业多用小型机组,能量利用率很低。如果能从这些机组的排气中回收部分能量并应用于本机组,就将可能有效地节约能量供给并提高机组的效率。 First, the introduction of China’s industrial waste heat, a considerable part of the industrial exhaust heat below 150 ℃. These low-temperature exhaust gas mainly generated in the textile industry systems such as textile, printing and dyeing, paper making, wood drying, food and food drying and other industries. In our country, these industries often use small units, and the energy utilization rate is very low. If part of the energy is recovered from the exhaust of these units and applied to the unit, it will be possible to effectively save energy and improve the efficiency of the unit.