A blower for high temperature fumes in paper machine

摘要

The article describes the project, strength calculations and construction optimization of a fan development, and its application in the blower, which was used for research of experimental, micro-jet blowing system, that regulates the moisture profile of the paper web. The blower was designed to compress to positive gauge pressure of 0.4 bar of fumes at a temperature of up to 500 degrees C with capacity of 1 m(3)/s. To meet these requirements, the blower was realized as an aggregate of four identical radial fans connected in series. Achieving the assumed pressure ratio for a single fan required the development of a specific rotor design and the use of steel with very good strength parameters at high operating temperatures. The fan was made in four copies and assembled into a prototype blower system for blowing fumes, which was successfully used in an experimental blower system for adjusting the cross profile of the web's moisture content in a paper machine.