In exhaust gas cleaning systems on ships, what is the role of a venturi scrubber?

Prepare for your Marine Engineering Exam with our engaging and informative quiz. Test your knowledge with multiple-choice questions, detailed explanations, and hints. Set sail towards success!

Multiple Choice

In exhaust gas cleaning systems on ships, what is the role of a venturi scrubber?

A venturi scrubber operates as a wet scrubber that creates intense gas–liquid contact to remove pollutants from exhaust. Water spray forms fine droplets, and as the exhaust gas passes through the narrow venturi throat, its velocity increases and it shears the droplets to maximize mixing. This strong interaction captures solid particulates by impaction and entrainment, while sulfur dioxide (SO2) readily dissolves in the water droplets, forming a dilute sulfurous/sulfuric solution that is carried away with the liquid. The cleaned gas then exits to the stack. So, its primary role is to remove particulates and scrub SOx from exhaust before discharge. It is not intended for filtering lubricating oil or measuring humidity, and NOx removal is not the main function of this device.

A venturi scrubber operates as a wet scrubber that creates intense gas–liquid contact to remove pollutants from exhaust. Water spray forms fine droplets, and as the exhaust gas passes through the narrow venturi throat, its velocity increases and it shears the droplets to maximize mixing. This strong interaction captures solid particulates by impaction and entrainment, while sulfur dioxide (SO2) readily dissolves in the water droplets, forming a dilute sulfurous/sulfuric solution that is carried away with the liquid. The cleaned gas then exits to the stack. So, its primary role is to remove particulates and scrub SOx from exhaust before discharge. It is not intended for filtering lubricating oil or measuring humidity, and NOx removal is not the main function of this device.

More practice questions