Scrubber sizing and selection is a critical step in designing efficient air pollution control systems across various industries, including chemical processing, oil and gas, pharmaceuticals, and power generation. Scrubbers are engineered devices used to remove particulates and gases—such as sulfur dioxide (SO₂), hydrochloric acid (HCl), ammonia (NH₃), and volatile organic compounds (VOCs)—from industrial exhaust streams before releasing them into the environment.
Choosing the right scrubber system requires a deep understanding of process conditions, emission characteristics, gas flow rates, pressure drop limitations, and removal efficiency requirements. An incorrectly sized scrubber can result in operational inefficiencies, increased maintenance, and environmental non-compliance.
This guide explores the core principles of scrubber sizing and selection, covering:
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Types of scrubbers (wet, dry, and semi-dry)
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Key design parameters like gas flow rate, liquid-to-gas (L/G) ratio, pressure drop, and residence time
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Material compatibility and corrosion resistance
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Mist eliminator and demister selection
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Energy efficiency and lifecycle cost considerations
Whether you’re designing a new system or optimizing an existing one, understanding these factors ensures reliable performance, regulatory compliance, and long-term cost savings.
Scrubber Sizing and Selection
