Injection lance assembly

摘要

The system and method for preventing air leakage from the process side to the bearing side of a mill. The system includes a labyrinth seal ring comprising a series of knives defining first and second labyrinth paths from an air inlet to the process side and the bearing side of the system, respectively. The differences in the two paths such as provided by the number of knives used in each path creates a differential pressure drop which biases air from the air inlet to the process side. The labyrinth seal thus provides a reliable and superior method for reducing the potential for particulate in the process side of the mill from damaging the bearing system.

主权项

1. An injection lance assembly which can be inserted into first and second ports of a ductwork, the assembly comprising;
a) a tube for providing particulate flow into a fluid stream within the ductwork, the tube being through the first port; b) a blade being displaced through the second port, the blade having first and second portions, the first portion providing a barrier to blunt passage of airflow therethrough, and the second portion including a curvature to encourage rotation of the blade.