Steam Separation

Steam Separation

 

the separation of water from saturated steam produced in steam generators. Steam separation prevents mineral impurities present in the water from being deposited on the inner surfaces of the pipes of the steam superheaters and on the blades of steam turbines; such impurities adversely affect the conditions for cooling the pipes and reduce the efficiency of steam turbines. In the process of separation, the steam entering the boiler of the steam generator is directed against baffles, cyclones, and other devices.

There are two types of steam separation: bulk and mechanical. Bulk steam separation results in the damping of the dynamic head of the streams of the steam-and-water mixture, the separation of large amounts of water, and the equilibration of the steam loads. Mechanical steam separation entails the capture of moisture residues from the steam exiting the boiler of the steam generator. At high pressures, condensate or feed water is used to remove dissolved substances from the steam. If the tap water contains high concentrations of salts, multistage evaporation is used; this technique was proposed by the Soviet scientist E. I. Romm in 1937. [23–802–]

References in periodicals archive ?
The reactor vessel height is also reduced through the use of an innovative approach to steam separation. Traditionally, pressurized water reactors (PWRs) have had either U-tube steam generators that include steam separation equipment or additional heat transfer area to heat the steam generator secondary side cooling water to superheated conditions.
The final methane conversion is equal to 14.5% about, much higher than the conversion required since the hydrogen concentration in the exit stream (after CO, CO2 and steam separation) is 41%.
The pulp line delivery will include chip washing, mainline refining and screening, reject refining, pulp washing, high-consistency bleaching and steam separation. The line will manufacture high-quality BCTMP pulp from poplar for light-weight offset printing paper production.
The pulp line delivery would include chip washing, main-line refining and screening, reject refining, pulp washing, high-consistency bleaching and steam separation, according to the company.
Some of the challenges conquered by the scrubber series include: Super high volume, uninterrupted, two, three or four phase flow steam separation; environmentally safe and continuous handling of large slugs of liquids or solids; optimization of large line, smart pig locomotion velocities; scrubbing of super high volume gas streams; and safe handling and disposal of "controlled blowout" effluents.
The delivery would include equipment for chip washing, main-line refining and screening, reject thickening and refining, pulp washing and bleaching as well as steam separation with heat recovery and a control system.