Wall-to-Suspension Heat Transfer in a CFB Downcomer

Figure 1

Layout for various applications. Riser with wall-mounted heat exchanger (1A) and/or in-bed heat exchanger (1B, less common); cyclone; storage hopper, possibly with in-bed encapsulated PCM (3A); downcomer, with wall-mounted heat recovery; secondary fluidized bed, with embedded heat exchanger; exhaust to further heat recovery and dedusting; (A) application for gas-solid reaction, for example, combustion (1A, 4, and 5), (B) application for solar energy capture and storage and steam generation (1 (without 1A), 3/3A, 4, and 5), and application for gas-catalytic reaction with in-bed heat transfer (1B, 4).