Low level heat energy is recovered from municipal wastewater using wastewater source heat pump.
利用污水水源热泵，可回收城市污水的低位能源。
For units without proper moderate or low level heat source, it is inadequate to adopt reboiler for heating and stripping.
装置内无适宜的中低温位热源者，则不宜采用重沸器加热汽提。
A beneficial approach was carried out to some technique such as high temperature absorption, low level heat utilization and mercury removal from smelter gas.
还对某些问题进行了有益的探索，如高温吸收、低位热能利用、烟气除汞等。
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