This hydroextractor of belt press is composed of two endless jointed filter belts, a roller dehydrate portion and a press dehydrate portion. The first moving roller is established in front of the press dehydrate portion and is wound by the two filter belt. The second moving roller is established in back of the press dehydrator. The supporting device enables the first and second roller reciprocate simultaneously. The trasfer device returns the supporting device rapidly. The sewage is supplied continuously by moving the filter belt while the press hydroextractor is at work.
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