ZDSD Series D hydraulic pulper changes the direction of slurry flow in the drive pulper, so that the slurry always tends to the central direction, and increases the height of slurry in the central part, at the same time increases the number of slurry impact on the impeller, and improves the slurry thinning capacity by 30%. It is an ideal equipment for the pulp and paper industry to dissolve pulp boards, waste paper and waste paper continuously or intermittently.