含油污泥固液分离技术的试验研究

对于处理联合站清罐产生的含油污泥 ,直接掩埋法、焚烧法、生物法和溶剂萃取法等方法因种种原因未能大范围推广。通过自行设计的含油污泥处理流程 ,采用化学法污泥系统脱稳加机械分离法 ,结合固液离心分离技术 ,对含油污泥进行絮凝处理 ,并采用旋流分离器或螺旋离心机对其进行固液分离试验。试验结果表明 ,采用旋流分离器处理后的污泥中含油 1 5 % ,污泥经自然干化后可用于铺路 ,其平均分离效率为 91 6 % ;采用螺旋离心机处理后的污泥中含油0 3% ,污泥可作为农用污泥直接排放 ,其平均分离效率为 98 38%。

Solid-liquid separation of oily sludge

According to the characteristic of solid-liquid separation, the sludge in oil tanks at oil gathering station is treated by cyclone separators and spiral centrifugals after flocculation treatment. Test shows that, treated by cyclone separators, the sludge contains only 1.5% of oil, and can be used for paving a road; while disposed by spiral centrifugal, the sludge, containing merely 0.3% of oil, can be directly discharged as agro-sewage. And the mean separation efficiency of the cyclone separator and centrifugal are 91.6% and 98.38% respectively.