Water tube steam generator
OwnerJohn W. Varneyinventor
Life of this patent
Estimating the term…
Abstract
A package steam boiler consists of four vertical combustion chambers surrounding a central vertical downcomer. A spherical steam drum is mounted at the top of the downcomer and a lower header is mounted at the bottom of the downcomer. The combustion chambers and downcomer are enclosed by tube-in-wall structures.
Claims15
A natural circulation package boiler comprising a plurality of identical vertical combustion chambers symmetrically arranged around and open to a central vertical downcomer, a spherical steam drum mounted on and supported by and connected to said downcomer, a first header assembly at the lower end of said boiler including a central enlargement on which said downcomer is mounted and to which it is connected, a second header assembly at the upper end of said boiler, a plurality of radiation tubes interconnecting said first and second headers all of said radiation tubes being linear and a plurality of risers interconnecting said second header and said steam drum each of said combustion chambers including a vertically upward firing burner.
A package boiler as claimed in claim 1, 2 or 3 radiation tubes are incorporated into the side walls of said combustion chambers.
A natural circulation package boiler comprising a central downcomer, four combustion chambers, each chamber including a vertically up firing burner said chambers surrounding said downcomer and isolated from the downcomer only by a cylindrical wall snugly surrounding said downcomer, a pair of return path chambers one on each of two sides of said combustion chamber, each return path chamber spanning two combustion chambers, a first header assembly at the upper end of said combustion chambers and connected to vertical radiation tubes within said combustion chambers, a second header assembly at the lower end of said combustion chambers connected to said radiation tubes and to the lower end of said downcomer, a spherical steam drum mounted on and supported by and connected to the upper end of said downcomer and a plurality of risers connecting said first header assembly to said stream drum, all of said vertical radiation tubes being linear.
Dependencies are inferred from the claim text.