Patent ID: 6435139
Filing Date: 2002-08-20
Classification: F22B

Abstract:
Waste heat boiler for cooling hot syngas in heat exchange with water under boiling pressure, consisting of an outer pressure shell (1) having a water space (2) filled with boiling water up to a predetermined level (4) and a steam space (3) above it, of heat exchanger tubes (5), through which the syngas to be cooled flows, arranged in the water space (2), and of a superheater for superheating the saturated steam generated by the boiling water, installed downstream from the heat exchanger tubes (5) and arranged within the pressure shell (1), characterized in that the superheater is positioned at least partially in the steam space (3) above the fluid level (4), and that the superheater is provided with straight tubes (7), through which the syngas coming from the heat exchanger tubes (5) flows and around which the steam exiting from the water space (2) circulates.