Method for further dehydration of lime-dried urban domestic sewage sludge in cement kiln before treatment

The invention relates to a method for further dehydration of lime-dried urban domestic sewage sludge in a cement kiln before treatment. The method is applied to treatment of the lime-dried urban domestic sewage sludge, and after the treatment by using the method, the influence on pre-decomposition kiln internal heat mass transfer, heat consumption, fuel use efficiency and cement clinker production efficiency of the cement kiln due to untreated sewage sludge can be avoided, and the negative influences of surface crusting of a pre-decomposition dust collecting part, blockage, cement clinker production efficiency drop of the cement kiln and the like are also avoided, so that the advantage of large treating capacity of the cement kiln for treating the urban domestic sewage sludge can be better brought into play.