Vapor/liquid separation apparatus for use in cracking hydrocarbon feedstock containing residual oil
一种裂化设备、烃原料的技术,应用在裂化、分离方法、液体脱气等方向,能够解决低效率、除去等问题
Active Publication Date: 2010-11-10
EXXONMOBIL CHEM PAT INC
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Problems solved by technology
The two-phase mist stream presents operational problems in the flash drum because at these high gas flow rates, the small liquid droplets containing non-volatile hydrocarbons do not coalesce and therefore cannot be efficiently removed from the flash drum as a liquid phase. remove
It was found that at a gas flow rate of 30 m / sec (100 ft / sec), the flash drum was only capable of removing heavy non-volatile hydrocarbons at a low efficiency of, for example, about 73%
Method used
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Abstract
A highly efficient vapor / liquid separation apparatus for treating a flow of vapor / liquid mixtures of hydrocarbons and steam comprises a substantially cylindrical vertical drum having an upper cap section, a middle section comprising a circular wall, a lower cap section, a tangential inlet to introduce hydrocarbon / steam mixtures, an overhead vapor outlet, and a bottom outlet for liquid. The vesselalso comprises an annular structure located in the middle section comprising (i) an annular ceiling section extending from the circular wall and (ii) a concentric internal vertical side wall to whichthe ceiling section extends. The annular structure blocks upward passage of vapor / liquid mixtures along the circular wall beyond the ceiling section and surrounds an open core having sufficient cross-sectional area to permit vapor velocity low enough to avoid significant entrainment of liquid.
Description
Vapor / liquid separation equipment used in cracking hydrocarbon feedstocks containing resid field of invention This invention relates to vapor / liquid separation apparatus exhibiting high efficiency in the removal of non-volatile hydrocarbons from hydrocarbon feedstocks. Background of the invention Steam cracking (also known as pyrolysis) has long been used to crack various hydrocarbon feedstocks into olefins, preferably light olefins such as ethylene, propylene and butenes. Conventional steam cracking uses a pyrolysis furnace with two main sections: a convection section and a radiant section. The hydrocarbon feed usually enters the convection section of the furnace as a liquid (except for light feeds entering as vapour), where the hydrocarbon feed is heated and gasified, usually by indirect contact with hot flue gas from the radiant section and by direct contact with steam . The gasified feedstock and steam mixture is then introduced into the radiant section where crackin...
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Patent Type & Authority Patents(China)
IPC IPC(8): C10G9/20C10G9/00B01D19/00
CPCC10G2300/104C10G2300/1055C10G2300/1022C10G9/20C10G2300/1044C10G2300/807C10G9/00C10G2300/1077C10G2400/20B01D19/0036C10G2300/1059C10G2300/1051C10G2300/1074C10G2300/107C10G2300/1033Y02P30/40
Inventor R·C·斯特A·R·迪尼克兰托尼奥G·斯蒂芬斯J·M·弗莱伊
Owner EXXONMOBIL CHEM PAT INC
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