Patent ID: 6397785
Filing Date: 2002-06-04
Classification: F23L,F28D,Y02E,Y10S

Abstract:
An improvement for an existing horizontal air preheater having a rotor housing including a plurality of axial seal plates, sector plates on both axial ends of said air preheater dividing said air preheater into a flue gas sector and at least one air sector, and a rotor located in said rotor housing having an axial post, a plurality of original diaphragms extending radially from the post to a shell, the original diaphragms forming compartments in said rotor, a plurality of heat exchange baskets stored in said compartments, a plurality of gratings or stay plates mounted within said compartments for mounting said baskets, an original radial seal extending from each axial edge of each of said original diaphragms, and an original axial seal extending from an outboard radial edge of each of said original diaphragms, wherein the improvement comprises an intermediate diaphragm mounted between each of said original diaphragms, the intermediate diaphragms extending radially from the shell to a position intermediate the post and the shell, an additional axial seal extending an outboard radial edge of each of said intermediate diaphragms, and an additional radial seal extending from each axial edge of each of said intermediate diaphragms.