Vacuum belt hydroextractor （also named fixed rubber belt vacuum filter） is a new solid-liquid separating equipment with high efficiency and continuous operation, based on introduction, assimilation and digestion of the techniques of the same products overseas. It has achieved solid-liquid separation by making full use of material gravity and vacuum suction. In terms of its structure, filtering section is arranged horizontally lengthwise, and length of filtering section can be fully used to fulfill in turn such a process covering filtering, rinsing and sucking up, with advantages of high filtering efficiency, productivity, good rinsing effect, wide application range, simple operation, stable running, convenient maintenance and service. It is especially suitable for filtering suspension liquid feed pulp with coarse particle of solid phase, high density and requiring frequent washing of filter cake. It can be widely used for solid-liquid separation in industrial sectors like metallurgy, mining, chemicals, paper-making, foodstuff, pharmaceuticals and environmental protection. It has special perfect application in gypsum dehydration in the course of flue gas desulfurization （FGD） by wet process.
