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http://dx.doi.org/10.7842/kigas.2021.25.3.1

A Study on the Gas-liquid Separation Effect of the Knockout Drum in the Flare System  

Kwon, Hyun-Gil (Department of Safety Engineering, Korea National University of Transportation)
Baek, Jong-Bae (Department of Safety Engineering, Korea National University of Transportation)
Kim, Sang-Ryung (Department of Safety Engineering, Korea National University of Transportation)
Publication Information
Journal of the Korean Institute of Gas / v.25, no.3, 2021 , pp. 1-8 More about this Journal
Abstract
Among the flare systems that handle discharged substances from safety valves, the knockout drum was a key facility for safety, but the installation standards were not clear, so it was necessary to review the standards acceptable to the workplace and regulatory agencies. After investigating the domestic and foreign technical standards of knockout drums and the deficiencies of previous studies, research was first conducted on the degree of mass discharge, the installation location of the intermediate knockout drum, and the effect of changes in the composition of the discharged material. As a result of the study under the process simulation conditions, the gas-liquid separation of the knockout drum was completed in a small amount of less than 7,500kg/hr. However, when more than that was released, the gas-liquid separation effect was small even with the addition of an intermediate knockout drum. In addition, when the composition ratio of the material easily condensed was increased (molar fraction 10%), the gas-liquid separation effect of the knockout drum increased in the case of mass release. The gas-liquid separation effect was analyzed to be greater when the knockout drum was installed adjacent to the stack than the knockout drum was installed adjacent to the process equipment.
Keywords
safety valve; flare system; knockout drum; simulation;
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