Lignite

Coupling power generation with syngas-based chemical synthesis according to the so-called ‘Polygeneration-Annex’ concept offers economic and technical benefits. Clemens Forman assesses the integration of incoming streams by the Annex plant from a power plant point of view across its full load range. Analyses are done by load-dependent flowsheet simulation. The pulverized lignite combustion power plant process is covered by two generic technical states: an existing 650 MW(el) power plant and a near future 1,100 MW(el) power plant with duo block design and dry lignite co-firing. Modeling comprises both the flue gas path and the water-steam circuit. Appropriate stream interfaces are identified and determined depending on the load status. The technical feasibility of integration can be proven.

This unique volume imparts practical information on the operation, maintenance, and modernization of heavy performance machines such as lignite mine machines, bucket wheel excavators, and spreaders.

The book is focused entirely on coals which are sub-bituminous in rank. In the coalification sequence these fall between lignite and bituminous. The book gives details of properties of such coals including calorific values and Hardgrove indices and then gives examples of their use in power generation. Powder River Coals have a chapter to themselves. There is a discussion of carbon sequestration at a plant raising electricity with sub-bituminous coals, also accounts of their carbonisation and gasification. There is consideration of conversion to liquid fuels, and of hazards including spontaneous heating and dust explosions. There is also a detailed section on pricing.