Sludge pre-treatment equipment

The invention discloses brand-new sludge pre-treatment equipment. For the characteristics that paper mill sludge is high in fiber content and large in compression ratio, the mode that chemical conditioning and mechanical dehydration are combined is adopted, the operation process that sectional feeding is combined with gradient pressure change is adopted to continuously filter and dehydrate sludge in a multi-stage and multi-batch manner, the defect that sludge cakes cannot be thoroughly filtered by using conventional equipment is solved, the water content of the sludge cakes can be effectively reduced by using the sludge pre-treatment equipment, the weight of sludge can be reduced, and the sludge resource development can be promoted.