Shell-side liquid metal boiler

Claim 1

A shell-side metal boiler comprising: A. a sealed shell defining therewithin a first chamber of a substantially cylindrical configuration; B. a plurality of tubular conduits mounted in said first chamber in parallelism with the longitudinal axis thereof for delivering a heated primary fluid therethrough; C. means defining a secondary fluid delivery port within one end portion of said shell for introducing a secondary fluid into said first chamber; D. means defining a secondary fluid discharge port within the opposite end portion of said shell for discharging the secondary fluid from the first chamber; E. means including a plurality of angularly related and longitudinally spaced baffle plates transversely seateD in said first chamber defining a helical path extending between said end portions of said shell for conducting the secondary fluid through said first chamber from said secondary fluid delivery port to said secondary fluid discharge port; F. means defining within said opposite end portion of said shell an entry plenum chamber communicating with the conduits for delivering said primary fluid to said conduits; G. means defining an exit plenum chamber within said one end portion of said shell communicating with the conduits for receiving said primary fluid from said conduits; H. a substantially sealed jacket of a cylindrical configuration spaced from the external surface of said shell and concentrically related thereto defining therebetween a second chamber concentrically related to said first chamber; I. means defining within said sealed jacket, adjacent said one end portion of said shell, a primary fluid delivery port for delivering primary fluid to said second chamber; and J. means defining within said opposite end portion of the shell a primary fluid discharge port extending between said second chamber and said entry plenum chamber, whereby the primary fluid delivered to said second chamber is discharged into said entry plenum chamber.