直燃机排烟温度过高，不利于节能，在烟道上加设余热回收装置。
The flue gas temperature of direct-fired machine is too high to save energy. A recovery device of residual heat is installed in the flue.
直燃机排烟温度过高，不利于节能，在烟道上加设余热回收装置。
The flue gas temperature of direct-fired machine is too high to save energy.
烟气余热回收系统不仅降低了直燃机排烟温度，还提高了夏季直燃机的一次能源利用率。
The recovery system of residual heat from flue gas can reduce the flue gas temperature of direct-fired machine and increase the primary energy utilization rate of direct-fired machine in summer.
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