Multi Stage Scrubbers E.xtol Hydro Technologies

Extol Hydro Technologies High-Efficiency Gas Scrubbers: a Cost-Effective Solution for High-Load Applications

Introduction: Today’s requirements dictate removal of many gas phase and fume contaminants to – or below – threshold limits values. Scrubber systems delivering this level of removal use dual-stage chemical scrubbing. Our scrubbers uses its initial stage to remove the majority of the inlet load; subsequent stages are polishing units, which bring system capability down to very low levels – often 1 ppm and lower.
Scrubber Design Extol Hydro Technologies scrubbers are conservatively engineered. This is particularly true as it relates to calculations on gas flow through the column. Generally, gas flow should not exceed 300 ft./min for these systems. Undersized columns operating at excessive velocity are common sources of operational difficulties, and are never used on our systems.
Liquid Recirculation Recirculation flow rates of Extol Hydro Technologies gas scrubbers are 10 to 20 gpm per sq. ft of scrubber cross section. This assures maximum contact between incoming contaminant and scrubbing liquor. Many industrial gas scrubbers re-circulate at too low a rate. This “downsizing” produces scrubber inefficiency, which is worsened when coupled with a too-small scrubber column diameter. The result is over velocity and under-flow, a combination that does a disservice to the owner. Extol Hydro Technologies systems are engineered for optimum velocity and flow rates, and maximum operating efficiency, both short and long-term. Our scrubbers are the most efficient wet gas and fume scrubbers available.
Packing Depth In addition to tower diameter and liquid recirculation rate, consideration must be given to the HTU analysis required to develop the necessary tower packing depth for each stage. Analysis is made of the inlet load characteristics and outlet load target. One difference between Extol Hydro Technologies scrubbers and others is packing depth. Extol Hydro Technologies scrubber designs are based on considerations that have been field-proven and validated over decades. Our scrubbers are built exclusively on hard data from successful installations.
Submicron Particulate Where submicron particulate in the gas stream is an issue, we offers several options for submicron particulate control, including venturi systems and mist chamber technology. The mist chamber is the more advanced alternative: it eliminates particulate from 300 microns down to 0.1 microns at efficiencies of 99.99%. Most notably, the mist chamber uses just 600 watts of power. The mist chamber is an excellent alternative when particulate is suspended in high-temperature gas streams. back to top
Scrubber Configurations The vertical packed bed design is preferable for most gas scrubber installations due to the advantages of gravity, which equally disperses scrubbing liquid over the packing media from single-point distribution nozzles. For installations with height restrictions, we will engineer an equivalent horizontal scrubber. The system will operate as a dry sump with two stages.
Process Instrumentation Extol Hydro Technologies provides complete instrumentation, including PC, SCADA, HMI, or PLC and NEMA-4 panel, pH, ORP, and temperature control, air sensors, and stack monitoring. Systems can be set up for remote and internet interface.
Construction Materials Extol Hydro Technologies gas scrubbers can be made from FRP, Polypropylene, PVC, C. S. Rubber Lined, or stainless steel. We strongly recommend homogeneous materials that do not rely on coatings or veils for performance. Only high integrity, homogenous materials are suitable for the aggressive environments encountered by these scrubber systems. Back to Air Treatment and Odor control... To download brochures go to this page...