ROTARY REGENERATIVE HEAT EXCHANGERS

摘要

A rotary regenerative air preheater is provided a linkage for adjusting the positions of movable and spring-biased sealing plates or strips relatively to the matrix. In this linkage is included a hydraulic servo motor governed by impulses from means sensing changes of the length of the linkage caused by a foreign body or the like passing between a sealing element and the matrix and forcing the sealing element away from the matrix. At such occasions the servo motor is actuated to move the sealing element further away from the matrix to allow the passage of the foreign body whereby damage is avoided.