Steam generator with several enclosed water vessels - produces uniform temp. steam or several different temp. steam flows

摘要

The steam generator has water containing vessel which is enclosed on all sides by another water containing vessel. This water containing vessel is in turn enclosed by further water containing vessels forming several water layers. The outermost layer is no longer heated from within. A thermal insulation layer is placed on outside surface. All water containing vessels have their own steam pipework which pass through the enclosing water containing vessel. The steam flows within different temp. ranges in separate streams. The boiler can be dimensioned so that all steam flow streams have the same temp. The outermost vessel is fed with returning condensate. Alternatively it can be fed with expanded steam from a steam turbine. The furnace is arranged under the innermost vessel.