Vertical Flow
Vertical flow tower systems are the best packed bed scrubber systems for controlling fumes / gases and particularly appropriate where gas streams have high loads.
Vertical flow packed bed systems
control fumes/gases, are ideal
for gas streams with high loading.

Tri-Mer packed scrubbers are highly recommended for the prevention and efficient removal of inorganic gases, odors, and vapor fumes. They are well-suited for use as primary or secondary systems in conjunction with thermal oxidizers, and are also used in a series where there are multiple-contaminant gas streams. Vertical Flow Scrubbers are suitable for chemical processes, metal finishing process, semiconductor manufacturing and dozens of other industrial operations generating fumes and gases. View our 8 page Packed Bed Tower Scrubber Brochure as an Acrobat pdf file.

Optimum system performance is achieved with systems that combine intimate gas/liquid mixing and low pressure drop.

There are several factors which influence the design of these systems:


Air flow through the scrubber, based on cubic ft/min. This is determined by the process to be handled by the scrubber, through information provided by customer and Tri-Mer analysis. System capacities of heavy service range to 100,000 cfm and above.


Internal vs. external recirculation system, fan location in relation to tower, duct sizes, inlet and outlet plus location of pump systems, tower access service ports, service platform requirement all influence layout. Standard construction materials include: polypropylene, fiberglass and PVC. Optional materials include high alloy metals such as stainless and Hastelloy. Also dual-laminate structures incorporating FRP over PVC, PP, PVDF and Teflon liners are available.


Removal efficiency of scrubber: inlet vs. outlet requirement, based on mass emission in lbs/hr. in vs. lbs./hr. out.

Factors to consider in calculating removal efficiency are:

  1. contaminant flow composition
  2. contaminant solubility
  3. chemistry that will react with contaminants
  4. reaction speed
  5. HTU (height transfer unit) factors required for specified removal efficiency (packing depth)
  6. liquid-to-gas ratio
  7. velocity
  8. gas temp. – up to 2000F with Q-Scrub quench option


Using this information and other factors specific to the site, Tri-Mer engineers determine the optimum tower diameter, packing depth, recirculation flow rate, and mist eliminator requirement. These calculations form the basis for a layout similar to the above photograph.

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