Vapor borne organic-silica, or silica fluoric-silica chloride or combination emissions are in many chemical manufacturing processes including: Semiconductor, Lubricant and Silicone, Fertilizer, and Solar cell wafer as well as other miscellaneous operations.
The emissions can't be sent to atmosphere without prior treatment because atmospheric moisture will reduce these compounds to silica smoke and acid fumes. The control method of choice is “wet scrubbing” where high volumes of
water or water enhanced with alkali is contacted with the gas to hydrolyze it and capture the solid and vapor contaminant prior to emission.
Unlike many other vapors, the silica compounds will often hydrolyze to a chemically active silicon oxide gel compound which can polymerize to form glass. Dry surfaces and tight constrictions within the gas/liquid contactor are
subject to damaging and frequently irreversible plugging.
D. R. Technology and staff, incorporating thirty plus years of scrubber experience, has installed many successful silica scrubbers over the years. The designs have been improved to solve unexpected problems so that the current designs can both be customized for specific cases. The general philosophy of design for these applications are:
- No dry walls, oo spray nozzles
- Easy access
- Clean out and compressed air connections
- Efficient but pluggage resistant contact for high acid level reduction
- Metal or thermoplastic construction options
- Packaged/skidded units available