Energy And Resource Savings In The Process Of
Absorption Drying Of Natural Gas By Glycols
Author(s)
A. A. Ali, M. S. Rogalev & R. Z. Magaril
Abstract
The preparation of natural gas for pipeline transportation using the method of
absorption drying by glycols is associated with significant costs of thermal
energy required for desorbing water from the saturated solution of glycol,
electric energy expenses for pumping the solution between desorber and
absorber, a loss of the absorbent within commercial gas due to drop ablation
and an increased corrosion rate of equipment due to the chemical aggressiveness
of the operating environment. The introduction of surface-active substances into
glycol is found to increase the rate of absorption of water from the natural gas
and the rate of water evaporation from the saturated solution of the absorbent.
Using the nickel salt of synthetic fatty acids in the concentration 20–25 ppm as a
surface-active substance leads to a drop down to 10°С in the dew point of the
dried gas and to an average twofold rise in the evaporation rate of water from the
saturated solution of the absorbent. The presence of a given quantity of the
nickel salt of synthetic fatty acids in glycol contributes to the suppression of
foam formation of the absorbent on the upper plate of the absorber and reduces
the corrosion rate of equipment by five times. As a result it becomes possible to
decrease the frequency rate of absorbent circulation in the drying system used for
obtaining the dried gas with the required properties. This automatically results in
a significant decrease in energy consumption. The reductions in permanent
losses of the absorbent and the corrosion rate of equipment improve savings on
energy resources.
Keywords: absorption, desorption, process of mass transfer, surfactants,
energy saving, resource saving.
Keywords
absorption, desorption, process of mass transfer, surfactants,energy saving, resource saving.
Related Book
Other papers in this volume
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