Heat exchanger

Abstract

A heat exchanger is provided with a heat transfer tube bundle housing duct for housing heat transfer tube bundles, openings provided on a sidewall of the heat transfer tube bundle housing duct, for freely inserting and removing the heat transfer tube bundles, and rails provided in a direction perpendicular to an inflowing direction of a flue gas G within the heat transfer tube bundle housing duct, for freely moving the heat transfer tube bundles. Since the heat exchanger can draw out only a specific heat transfer tube bundle, it is possible to reduce a maintenance period, thereby minimizing a regular inspection period.

1 - 5 . (canceled) 
     
     
         6 . A heat exchanger, comprising:
 a heat transfer tube bundle housing duct for housing heat transfer tube bundles;   openings provided on a sidewall of the heat transfer tube bundle housing duct, for freely inserting and removing the heat transfer tube bundles;   rails provided in a direction perpendicular to an inflowing direction of a flue gas within the heat transfer tube bundle housing duct, for freely moving the heat transfer tube bundles;   temporary support parts provided in a structure outside the heat transfer tube bundle housing duct;   moving rails supported by the temporary support parts, for moving the heat transfer tube bundles; and   a driving apparatus for drawing out the heat transfer tube bundles on the moving rails.   
     
     
         7 . The heat exchanger according to  claim 6 , comprising:
 bundle-bottom-rails provided in the openings, for drawing out and moving the heat transfer tube bundles from a sidewall side in a direction perpendicular to a flue gas direction within the heat transfer tube bundle housing duct.   
     
     
         8 . The heat exchanger according to  claim 6 , comprising:
 bundle-bottom-rail provided in the openings, for drawing out and moving the heat transfer tube bundles from the sidewall side in a direction perpendicular to a flue gas direction within the heat transfer tube bundle housing duct.   
     
     
         9 . The heat exchanger according to  claim 8 , comprising:
 back rails provided at back sides of the heat transfer tube bundles, the back side coming in contact with the bundle-bottom-rail.