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以某钢厂的污泥处理系统为例,探讨了离心脱水机在调试过程中的絮凝剂选择、主机转速的调整、扭力矩的确定以及进泥量与污泥含水率的关系。调试过程历时半个月,通过烧杯试验和上机试验最终确定采用离子度为40%、分子质量为6 000 ku的阳离子聚丙烯酰胺(PAM)作为污泥脱水的絮凝剂;以产泥含水率为评价指标,确定最佳主机转速为2 500 r/min、最佳扭力矩为17N·m。另外发现,进泥含水率越低,则出泥含水率亦越低,但进泥含水率偏低时会导致离心机处理能力下降;增大进泥含水率可提高离心机的最大进泥量,但出泥含水率随之升高,因此,在离心机选型时一定要明确污泥含水率参数,在调试过程中,要根据实际情况确定合适的进泥量。
Taking a sludge treatment system of a steel mill as an example, this paper discussed the choice of flocculants, the adjustment of the host speed, the determination of torque and the relationship between the amount of sludge entering and the moisture content of sludge in the commissioning process of centrifugal dewatering machine. Commissioning process lasted half a month, through the beaker test and the machine test finally determined the use of cationic polyacrylamide (PAM) with 40% ionic strength and molecular weight of 6 000 ku as sludge dewatering flocculant; to produce mud moisture content For the evaluation of indicators, to determine the best host speed of 2 500 r / min, the best torque of 17N · m. In addition, it is found that the lower the water content of the mud, the lower the water content of the mud, but the lower the water content of the mud will lead to a decline of the processing capacity of the centrifuge; increasing the water content of the mud can increase the maximum amount of mud in the centrifuge , But the moisture content of the mud increases subsequently, therefore, in the selection of centrifuge must be clear sludge moisture content parameters in the debugging process, according to the actual situation to determine the appropriate amount of mud into.