Specification for Glycol-Type Gas

Typically, the separator is a vertical cylindrical vessel equipped with vanes and/or mesh to remove fine droplets of liquid from the gas. Tables for estimating the required diameter of separators for various gas flow rates and conditions are given in several publications, including The API Specification for Glycol Type Gas Dehydration Units (1990) and a paper by Pearce and Si vails (1993). The tables are based on the Souders-Brown correlation, which is quite simple to use directly, i.e.. 

An alert on hydrocarbon emissions from glycol dehydration units issued by 77te American Petroleum Institute, in connection with their Specification for Glycol-Type Gas Dehydration Units (1990), contains a mass balance for a 10 MMscfd TEG unit operating at 800 psia and 130°F with a feed gas containing 100 ppm benzene. The study indicates that 10% (3 tons per year) of the benzene is absorbed and discharged in the regenerator vapor stream. In this... 

American Petroleum Institute (API), 1990, Specifications for Glycol-Type Gas Dehydration Units" API Spec. 12 GDU, First Edition, Dec. 15, 1990. 

Bornhiitter [66] has published new experimental data on the prediction of droplet size in gas/liquid systems with relation to dripping processes as well as the breakdown of sprays and threads, using water, ethylene glycol and methanol. The evaluation of the experiments shows that the droplet diameter, acc. to Eq. (2-26), is independent of the specific liquid load and of the size and type of the packing. It does, however, depend on the wetting properties and the physical properties of the liquid. In the case of ceramic, the droplets are larger than for other materials, such as PP, PTFE and stainless steel. In terms of the adhesion work + cos0) 10 = 80 — 120, the constant Cp is approx. 1 0.15. 

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