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The utility model relates to the technical field of liquid treatment, in particular to an efficient filtering liquid-liquid separation coalescence filter element which comprises an inner framework, a demulsification layer, a coalescence layer and an outer framework, a plurality of through holes are formed in the surfaces of the inner framework and the outer framework, an end cover is arranged on the top of the inner framework, and an interception layer for intercepting liquid garbage is arranged on the inner side of the inner framework. A first liquid discharging space is formed between the inner framework and the demulsification layer, and a first filtering layer and a first flow guide layer are placed in the first liquid discharging space; according to the oil-containing sewage treatment device, entering oil-containing sewage is preliminarily filtered through the intercepting layer, large-particle garbage impurities in the oil-containing sewage are intercepted and filtered, then the oil-containing sewage reaches the first filtering layer through the inner framework to be filtered, and the first filtering layer filters small solid particles passing through the intercepting layer, so that passing of the solid particles is reduced; follow-up demulsification layers and coalescence layers are prevented from being polluted, the risk that particulate matter blocks a flow guide groove in the first flow guide plate is reduced, and long-term efficient operation is maintained.

The application relates to a single crystal furnace, comprising: a crucible supporting rod; a supporting rod cover sleeved outside the lower end of the crucible supporting rod; wherein the lower end of the crucible supporting rod is provided with a first taper surface, the outer diameter of the first taper surface decreases from top to bottom in sequence, the upper end of the supporting rod cover is provided with a second taper surface, the inner diameter of the second taper surface decreases from top to bottom in sequence, and the first taper surface is arranged above the second taper surface in a spaced mode. The application can adjust the direction between the crucible supporting rod and the supporting rod cover from the existing vertical direction to the inclined direction, so that the probability of high-temperature silicon liquid passing through the gap between the crucible supporting rod and the supporting rod cover is reduced when the phenomenon of particle material splashing silicon and jumping silicon occurs, and then the problem that the corrugated pipe connected to the lower end of the supporting rod cover is scalded and causes the furnace body to leak and be smothered is improved.