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The invention of the recovery boiler by G.H. Tomlinson in the early 1930s was a milestone in the advancement of the kraft process. [1] Recovery boilers are also used in the (less common) sulfite process of wood pulping; this article deals only with recovery boiler use in the kraft process.
The original boilers were developed to burn coal, but they have been used since to burn many sorts of wood or plant waste. A chain-fed automatic stoker may also be fitted, where a heavy firing rate is required. The three-drum form is also used as a heat-recovery boiler, using the exhaust gases from steelworks or other industrial processes. [2]
The heat recovery boiler is item 5 in the COGAS figure shown above. Hot gas turbine exhaust enters the super heater, then passes through the evaporator and finally through the economiser section as it flows out from the boiler. Feed water comes in through the economizer and then exits after having attained saturation temperature in the water or ...
The Westinghouse Combustion Turbine Systems Division (CTSD), part of Westinghouse Electric Corporation's [1] Westinghouse Power Generation [2] group, was originally located, along with the Steam Turbine Division (STD), in a major industrial manufacturing complex, referred to as the South Philadelphia Works, in Lester, Pennsylvania near to the Philadelphia International Airport.
A schematic process flow diagram of a basic 2+1-reactor (converter) SuperClaus unit is shown below: Schematic flow diagram of a straight-through, 3 reactor (converter), Claus sulfur recovery unit. The Claus technology can be divided into two process steps, thermal and catalytic.
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 ...
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The actual vapor power cycle differs from the ideal Rankine cycle because of irreversibilities in the inherent components caused by fluid friction and heat loss to the surroundings; fluid friction causes pressure drops in the boiler, the condenser, and the piping between the components, and as a result the steam leaves the boiler at a lower ...