Knockout Drums are two phase liquid gas separators used for separation of oil and/or water from gas streams. They are also called by several other names based on technology used. Some of these names are mist eliminators, scrubber separators, vane pack separators, demister pad separators, inertial separators, flash drums, mesh pad separators, droplet separators, gas liquid separators, vapor liquid separators, cyclone separators and chevron mist eliminators. They are designed for horizontal and vertical installations depending on liquid loading and gas volume.
Sungov performs separator design including sizing the vessel to promote high separation efficiency. Sungov offers scrubber separators with either a demister pad or vane pack. Scrubber design includes selection of demister pad size, mesh pad density and thickness, vane pack type for fine droplet separation.
Sungov manufactures Knockout Drums for several applications including natural gas, flare gas, and other fuel gas. The Knockout Drums are generally constructed to ASME Sec VIII Div. 1 Code of construction with/without ASME stamping.
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FAQs About Knockout Drums & Scrubbers
Q 1. What is a fuel gas scrubber and how does it work?
A fuel gas scrubber is a vessel that removes liquids and contaminants from fuel gas streams before they enter processing or combustion systems. It works by slowing the gas flow so liquids and particles drop out, protecting downstream equipment and improving efficiency.
Q 2. What is the difference between a natural gas scrubber and a vane pack separator?
A natural gas scrubber broadly refers to any device that cleans incoming gas, while a vane pack separator specifically uses angled vanes to create centrifugal forces that enhance liquid droplet removal. Vane packs are commonly used inside scrubbers or knock out drums for improved separation performance.
Q 3. What is a vertical knock out drum and why is it used?
A vertical knock out drum is an upright separator designed to capture liquid droplets from gas streams. Its vertical design allows liquids to drain downward easily while clean gas rises upward. It’s widely used in fuel gas, flare, and natural gas scrubber systems to protect compressors and flare headers from liquid slugging.
Q 4. How is a fuel gas knockout drum designed for industrial use?
A fuel gas knockout drum design combines inlet diffusers, internal baffles or vane packs, and an adequately sized liquid reservoir to promote gravity and mechanical separation. Proper design ensures gas velocities are low enough to allow liquid to fall out and drain, preventing carry-over into sensitive equipment.
Q 5. What is a flare knock out drum and where is it installed?
A flare knock out drum is a liquid separator placed upstream of a flare system. It protects flare tips from liquid carry-over by removing condensate and debris from the gas stream, ensuring safe and efficient combustion at the flare stack.
