BABCOCK & WILCOX SUPERHEATERS 



AS APPLIED TO RUST BOILERS 



TH E construction of the Babcock & Wilcox superheater as applied to Rust 

 boilers is exactly similar to that used with Stirling boilers already described, 

 the cored type of superheater being used exclusively. 



Saturated steam is taken through a dry pipe from the rear steam drum by 

 an outside connecting pipe to one end of the intake header and is removed from 

 the outlet header by a single connection, either at the same or opposite end. 

 Inlet and outlet elbows such as have been described are used for these connections. 



SUPPORTS The superheater headers are supported by channels or " I " beams, 

 extending from front to rear of the boiler setting. In some instances both boxes 

 are hung by straps from these supporting members and in others the lower box 

 is so supported and the upper box is carried on saddles resting on these members. 

 The superheater is held in its vertical position 

 by tube clamps attached to the superheater 

 and to boiler tubes. 



LOCATION The superheater, in Rust 

 boilers, may be placed in one of two posi- 

 tions, both of which are clearly shown in the 

 illustrations. When the degree of superheat 

 required is not in excess of 75 degrees, the 

 superheater is placed at the top of the second 

 pass between the vertical baffle and the rear 

 bank of tubes. When a greater degree of 

 superheat than this is required the super- 

 heater is placed toward the bottom of the 

 first pass between the front bank of tubes 

 and the vertical baffle. 



When placed in the second position, 

 the superheater members are protected from 

 the direct impinging of the gases of combus- 

 tion by baffles, the method of supporting 

 which may be readily seen from the illus- 

 trations. The construction of this baffle and 

 support is such as to allow any accumulation 

 of dust when blown from the superheater or 

 boiler tubes to fall to the cleaning pit under the front mud drum. 



ACCESSIBILITY As with superheaters installed with other boilers of The 

 Babcock & Wilcox Company's manufacture, all parts are readily accessible for 

 cleaning, inspection and repair. 



BABCOCK & WILCOX SUPER- 

 HEATER IN THE SECOND 

 PASS OF A RUST BOILER 



