US 2006/0124077 A1Published application

Continuous steam generator with circulating atmospheric fluidised-bed combustion

AssigneeALSTOM Power Boiler GmbH

InventorsGerhard Weissinger, Georg-Nikolaus Stamatelopoulos, Gunter Trautmann

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Abstract

A continuous steam generator with a circulating atmospheric fludized-bed chamber is defined by encircling walls essentially on all sides, comprised of gas-permeable tubular walls provided with essentially vertical tubes, and comprises at least one funnel in its lower region. The turbulence combustion chamber has at one essentially vertically arranged heating surface provided with vertical tubes, said heating surface comprises of a welded tube-web-tube combination, and a water/steam working medium flows through the tubes of the encircling walls and the heating surface. All of the tubes of the encircling walls and the heating surface are embodied as evaporator heating surfaces and are mounted in parallel for the circulation of the entire working medium to be evaporated. In addition, all of the tubes of the encircling walls have an inner smooth surface, and the heating surface extends between the bottom of the combustion chamber or the upper edge of the funnel, and the top of the combustion chamber.

Claims20

Dependent claims

A continuous steam generator having a circulating atmospheric fluidized-bed firing system, having a fluidized-bed combustion chamber,

in which the fluidized-bed combustion chamber is essentially defined on all sides by enclosing walls, having gas-tight tubular walls essentially comprising vertical tubes and in the lower area at least one funnel,
and the fluidized-bed combustion chamber is embodied with at least one essentially vertically disposed heating surface equipped with vertical tubes, whereby the heating surface is comprised of a welded tube-web-tube combination,
and whereby the tubes of the enclosing walls and the heating surface have a water/steam working medium passing through them,
wherein
all tubes of the enclosing walls and the heating surface are configured as an evaporator heating surface, and they are connected in parallel so that all of the working medium that is to be evaporated can pass through them,
all tubes of the enclosing walls are configured with a tube surface area that is smooth on the inside,
and the heating surface extends between the bottom of the combustion chamber or the top of the funnel edge and the combustion chamber cover.

4 more elements

Dependencies are inferred from the claim text.