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Pingxiang Daier Separation TechSep 21, 20262 min read

Engineering Evaluation Case: Activated Carbon or Lime Powder from an Incinerator Gas-Treatment System Reaches the Wet Packed Scrubber

When activated carbon, lime, or other injected sorbent powder reaches a downstream wet scrubber, it can form slurry, foul packing, block distributors, and blind mist eliminators. Review upstream particulate-control performance, solids loading, recirculation solids removal, packing openness, and deposit composition before replacing the packed bed.
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Pingxiang Daier Separation TechSep 21, 20262 min read

Engineering Evaluation Case: A Venturi Pre-Scrubber Sends So Much Liquid Carryover into the Packed Tower That the Polishing Bed Floods

When a Venturi scrubber feeds a downstream packed tower, include Venturi droplet and slurry carryover in the packed-bed hydraulic load. Excess entrainment can overload the lower bed, increase pressure drop, deposit solids, and make the tower appear undersized. Interstage separation should be reviewed before changing packing.
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Pingxiang Daier Separation TechSep 21, 20262 min read

Engineering Evaluation Case: One Odor Scrubber Must Remove Both H₂S and NH₃ but the Two Contaminants Prefer Different Liquid Chemistry

A mixed H₂S/NH₃ odor stream should not be treated as one generic “odor gas” duty. Because H₂S and NH₃ favor different absorption chemistries, evaluate concentrations, pH requirements, stage configuration, interstage carryover, and individual outlet targets before selecting packed-bed height or media.
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Pingxiang Daier Separation TechSep 21, 20262 min read

Engineering Evaluation Case: Reboiler Entrainment Carries Heavy Liquid into the Bottom of a Structured-Packing Bed

When the lower section of structured packing fouls or floods after reboiler duty increases, investigate liquid entrainment from the reboiler or sump. Vapor disengagement, operating level, vapor velocity, heavy-component carryover, lower-bed pressure drop, and inlet spacing should be reviewed before replacing the packing.
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Pingxiang Daier Separation TechSep 21, 20262 min read

Engineering Evaluation Case: Fermentation Broth Carryover Causes Foaming and Fouling in a Packed Ethanol Distillation Section

For fermentation-based ethanol distillation, evaluate suspended solids, proteins, foam, upstream clarification, antifoam carryover, packing fouling, distributor condition, and cleaning requirements. A pressure-drop increase may originate from feed contamination rather than insufficient clean packing capacity.
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