螺旋压榨式脱水机对污泥脱水的试验研究

Experimental Research on Sludge Dewatering by Screw Press Dehydrator

考察了螺旋压榨式脱水机对污泥的脱水性能。结果表明:对于含水率为97.9%的消化污泥,在絮凝剂投配率为0.51%、螺杆转速为0.25 r/m in的条件下,脱水后泥饼含水率最低可达70.3%、固形物回收率为98.89%、污泥处理量为24.84 kg/h;对于含水率为99.7%的剩余污泥,在絮凝剂投配率为0.94%、螺杆转速为0.75 r/m in的条件下,脱水后泥饼含水率为82.5%、固形物回收率为92.46%、污泥处理量为8.64 kg/h。螺旋压榨式脱水机对污泥的处理效果较带式脱水机有很大提高。

The sludge dewatering performance of screw press dehydrator was investlgated, The results show that for the digested sludge with moisture content of 97.9%, under the condition of flocculant dosing rate of 0.51% and screw speed of 0.25 r/min, the minimum cake moisture content after dewatering is 70.3% , the solid recovery is 98.89% and the sludge treatment capacity is 24.84 kg/h. For the excess sludge with moisture content of 99.7%, under the condition of floceulant dosage rate of 0.94% and screw speed of 0.75 r/min, the cake moisture content after dewatering is 82.5% , the solid recovery is 92.46% , and the sludge treatment capacity is 8.64 kg/h. Compared with belt dehydrator, the sludge treatment effect is greatly improved.