Extrusion dewaterer

Abstract

The invention discloses an extrusion dewaterer, which comprises a slantly-arranged tunnel screw extruder, wherein the tunnel screw extruder comprises a tunnel, a screw extrusion shaft arranged in a tunnel and blades of the screw extrusion shaft; the lower end of the screw extruder is provided with a sludge inlet, while the higher end is provided with a sludge outlet; and a water tank is arranged below the screw extruder, and is communicated with the screw extruder through a water-falling hole at the bottom of the tunnel. The tunnel screw extruder is provided with a plurality of sets of mutually-matched fixed rings and moving rings, wherein the fixing rings are fixed on the inner wall of the tunnel, a moving ring is arranged in a clearance between each two fixed rings, a clearance is formed between the internal circumferential surfaces of the fixed rings and the moving rings and the blades of the screw extrusion shaft, and axial clearances between the fixed rings and moving rings gradually decrease from the sludge inlet to the sludge outlet. The extrusion dewaterer has the advantages of simple structure, simple and convenient operation, and high solid-liquid separation rate, and avoids the problem of blocking skillfully.

Description

technical field [0001] The invention relates to an environmental protection equipment, in particular to an extruding dehydrator, which is an important equipment in the sludge dehydration process, and is used for solid-liquid separation of flocculated oil-containing and alcohol-containing sewage cement. Background technique [0002] At present, there is no equipment to separate the sludge from the sludge water in the oil-containing and alcohol-containing low-concentration sewage sludge produced by the development of oil and gas fields. It turned out that the oily and alcohol-containing sewage cement produced in the process of oil extraction, gas and oily sewage concentration was pulled to the sludge pond by car. The sewage cement in the sludge pond was naturally dried by the sun to evaporate the water, methanol and water in the sludge. Condensed oil, after evaporation and drying, the sludge is transported by truck and then incinerated or buried in the ground. This treatment ...

AI Technical Summary

Problems solved by technology

Among them, the solid-liquid separation rate is related to the final recovery efficiency. The traditional solid-liquid separation process uses filter cloth and centrifugal filtration. There are also screw extruders in related industries, but the existing screw extruders mainly use The gradually smaller space between the variable pitch screw and the flow channel compresses the solid-liquid mixture. As the liquid is lost, the solid is compressed, which is prone to blockage. Therefore, the space between the variable pitch screw and the flow channel cannot be made too large. Small, and a larger space will in turn affect the efficiency of solid-liquid separation

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