Boiler having a fluidized bed heat exchanger

Abstract

The invention refers to a boiler having a fluidized bed heat exchanger. The invention relates to a fluidized bed heat exchanger (3A), the heat exchanger (3A) including a plurality of tubes (7) forming a tube bundle, each tube (7) following a vertical boustrophedon path, the tubes (7) being supported by at least two vertical supporting devices (41,42) placed on both sides of the tube bundle, characterized in that every vertical supporting device (41,42) comprises at least two vertical supports (411,412;421,422) for fixing the tubes (7).

Description

technical field The present invention relates to boilers, typically circulating fluidized bed boilers (CTB), which include fluidized bed heat exchangers. A circulating fluidized bed boiler comprises a reactor in which solid particles are fluidized and in which chemical and / or combustion reactions can take place. Circulating fluidization enhances particle mixing and potentially exothermic or endothermic chemical reactions. Background technique The principle of operation of a fluidized bed heat exchanger is relatively simple: hot solids are brought into a chamber where they are gasified by air or a recirculation flue into a slowly bubbling fluidized bed. A heat exchanger element (usually in the form of a coil following a right-hand left-hand alternate writing path) is located inside the fluidized bed and is supplied with coolant fluid. The coil must be held by supports. It is known to use a sliding connection to the support, allowing differential movement between the tube ...

AI Technical Summary

Problems solved by technology

However, this solution requires great construction skills to install all the different parts of the fluidized bed heat exchanger without gaps and without difficulties afterward to evaluate the good execution of the work

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