Abstract
The high temperature, high pressure fluidized bed coal combustor concept is intended to deliver a low dust content combustion gas at 1600°F and 11 atmospheres to a gas turbine for electricity generation. The perceived advantages of the system are 1) 15-20% increase in fuel efficiency and 2) flue gas desulfurization by adding crushed limestone to the fluidized bed combustor. A major R & D effort, supported by DOE, EPA, EPRI, and others, was undertaken to identify one or more gas cleaning systems of commercial size capable of 1) meeting EPA’s new source performance standards for coal burning power plants and 2) operating reliably under the severe environmental conditions specified. The principal gas cleaning systems that have been investigated for this service include: ceramic cleanable cloth filters, granular bed filters, rigid, porous ceramic structures, and electrostatic precipitators. Some of the fly ash collectors have been operated up to pilot scale size under realistic conditions. In spite of several...
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