Press filtering device provided with core filtering unit inside

Abstract

The invention discloses a press filtering device provided with a core filtering unit inside. The device comprises a press filtering component containing the filtering unit and a pressure applying component, wherein the filtering unit is placed in a pressed material to become the core of the pressed material. The pressed material is placed in a relatively sealed cavity, and the press pressure (up to 10 MPa at maximum) is increased. Due to the sealed press operation system, the loss of the pressed material during pressing is avoided, the press efficiency is improved, the press operation environment is improved, the space is fully utilized, and 50% of the floor area is reduced. For municipal sludge difficult to dewater, the dewatering rate can reach about 50%; for production of oil press andsugar refining, the liquid yield can be increased by 0.5%.

Description

technical field [0001] The invention belongs to the technical field of press filtration. Specifically relates to a press filter device with a built-in core filter unit. Background technique [0002] The traditional squeeze filtration is a process in which the liquid inside the squeezed material moves and flows out to the outer surface of the squeezed material under the action of extrusion to realize the squeeze filtration process. At present, there are belt filter press, plate and frame filter press and screw press filter press in the field of sludge drying. The sludge dehydration rate of these equipment is generally below 20%. After adding external solid auxiliary materials to the filter press system, the apparent dehydration rate of the plate and frame filter press equipment can reach about 50%. But this is only the dehydration rate due to the increase in the apparent dryness of the sludge after adding solids. In fact, the dehydration rate has not been substantially imp...

AI Technical Summary

Problems solved by technology

At present, most of the press filtrate equipment used in the oil and sugar industries are screw extrusion equipment, which has the phenomenon of low pressing pressure and relatively low liquid output rate.

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