Double-stage double-screw extruder

A first vertical pipeline, a second vertical pipeline and a transfer pipeline are arranged in a segmented manner, and a first-order processing pipeline and a second-order processing pipeline are arranged in a staggered manner, so that materials to be processed in the first-order processing pipeline can fall into the second-order processing pipeline in a segmented manner; the whole machining efficiency is effectively improved, energy consumption can be reduced while the product quality is guaranteed, in the process that materials pass through the first vertical pipeline, the second vertical pipeline and the transfer pipeline, an air suction pump is started, air existing in the pipelines is pumped out, and it is avoided that the air enters the second-order machining pipeline to affect the product quality; and the extracted gas is simply treated by the activated carbon filter plate and then is discharged. 本实用新型公开了一种双阶双螺杆挤出机，通过第一竖直管道、第二竖直管道和转移管道的分段设置以及对一阶加工管道和二阶加工管道的交错设置，使得一阶加工管道中进行加工的物料能够分段落下至二阶加工管道中，有效提高整体的加工效率