Patent ID: 6766772
Filing Date: 2004-07-27
Classification: F22B

Abstract:
An apparatus for heating steam formed from cooling water in a heat exchanger for hot gas, comprising a primary heat-exchanger vessel having a compartment for cooling water, an inlet for the gas to be cooled, an outlet for cooled gas, an outlet for heated steam and a collecting space for maintaining generated steam;at least one primary evaporator tube positioned in the compartment for cooling water and fluidly connected to the inlet for the gas to be cooled; at least one steam tube for withdrawal of generated steam from the collecting space for maintaining generated steam via a steam outlet of said collecting space; at least one superheater module, comprising a vessel positioned in the compartment for cooling water, wherein the generated steam is further heated against partially cooled gas from the primary evaporator tube; wherein the primary evaporator tube is fluidly connected to the tube side of the super heater module and the steam tube for withdrawal of generated steam is fluidly connected to the shell side of the superheater module; and, wherein means for adding water to the generated steam entering the super heater module are present.