节能双效浓缩器：一效二次蒸汽作为二效的热源给物料加热，再次利用热能，提高利用率，能有效节能。
Energy-saving double-effect concentrator: the secondary steam of the first-effect is used as the heat source of the second-effect to heat the materials, which improves the utilization rate of heat energy.
热泵双效浓缩器：通过热泵将一效二次蒸汽压缩后再提供给二效加热，从而大量节约锅炉蒸汽的使用量，降低生产成本。
Heat pump double-effect concentrator: the secondary steam of the first-effect is compressed by the heat pump and then supplied for the second-effect heating, thus greatly saving the consumption of boiler steam and reducing the production cost.
