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The flue gas heat loss will decrease as the flue gas flow diminishes. Increasing black liquor dry solids is especially helpful since the recovery boiler capacity is often limited by the flue gas flow. A modern recovery boiler consists of heat transfer surfaces made of steel tube; furnace-1, superheaters-2, boiler generating bank-3 and ...
Although generally a land-based boiler, the four-drum form was also used as a marine boiler, to power large ships. [4] The brick-built setting was replaced with a box-like steel housing, lined with firebrick. The water-tube diameter was reduced to between 2 and 2 + 1 ⁄ 2 inches (50.8 and 63.5 mm). To avoid problems with the water levels ...
The Chemrec process for gasification of black liquor from the chemical pulp industry offers to increase the yield of high-value energy products from 15 to 16% in modern recovery boilers to 22–23% for the BLG electricity concept (BLGCC) or to 55% for the BLG bio fuel concept (BLGMF), with 90+% green-house gas reduction.
Sections of a steam locomotive showing the many fire-tubes which carry the hot gases of the fire through the boiler to heat the water and so create steam. Boiler design is the process of designing boilers used for various purposes. The main function of a boiler is to heat water to generate steam.
A heat recovery steam generator (HRSG) is an energy recovery heat exchanger that recovers heat from a hot gas stream, such as a combustion turbine or other waste gas stream. It produces steam that can be used in a process ( cogeneration ) or used to drive a steam turbine ( combined cycle ).
A process flow diagram (PFD) is a diagram commonly used in chemical and process engineering to indicate the general flow of plant processes and equipment. The PFD displays the relationship between major equipment of a plant facility and does not show minor details such as piping details and designations.
A recuperator is a special purpose counter-flow energy recovery heat exchanger positioned within the supply and exhaust air streams of an air handling system, or in the exhaust gases of an industrial process, in order to recover the waste heat. Generally, they are used to extract heat from the exhaust and use it to preheat air entering the ...
Often used for heat-recovery from the exhaust of large Diesel engines. [16] Climax boiler: A vertical water-tube boiler with many long spiral coils around a central steam-and-water drum. [17] Cochran boiler: a vertical boiler with horizontal fire-tubes. [18] composite boiler: a boiler used for either direct-firing, or as a heat-recovery boiler ...