ERG`s purpose-designed scrubbing systems are engineered to suit each application and client`s requirements. During the microelectronics boom years in the 1990s, ERG installed a variety of plants treating acid off-gases (HF, F2, HCl, Cl2, etc) with the capability to handle the sticky silanes formed from chlorosilane hydrolysis.
The industrial dedusting field is very varied and branches out in numerous specialized branches. For a preliminary examination of the problem it is necessary to dispose of two series of data: characteristics of the system which emits the pollutants; nature of pollutants and their characteristics.
Hydrogen Peroxide as a Replacement for Sodium Hypochlorite
Hydrogen peroxide may be used in both mist scrubbers and packed tower scrubbers as a replacement for sodium hypochlorite (bleach). Like bleach, the process involves two concurrent mechanisms: 1) absorption of the odors (H2S) into the alkaline scrubbing solution; and 2) oxidation of the absorbed sulfide in solution.
H2S + NaOH → NaSH + H2O
4H2O2 + H2S → H2SO4 + 4H2O
Typical dose ratios are 5 parts H2O2 per part H2S or, when...
For industrial and municipal treatment plants; Chemical scrubbers, biological towers and adsorption systems to remove hydrogen sulfide, mercaptans, other organic sulfur compounds and ammonia from digesters, pump stations, ponds, grit and screening works, sludge filter presses and dryers. Special Wet Electrostatic Precipitator for sewage sludge incinerators. Stripping ammonia and other volatile compounds. Decarbonization removal of carbon dioxide from wastewater.
Emissions of silicon tetrafluoride, hydrochloric acid, hydrofluoric acid, chlorine from silica glass manufacturing and coating. Emergency scrubbing. Drawing Tower off-gas emissions. High temperature emissions of particulate and acid gases from furnaces. Hydrochloric acid recovery and re-concentration.
Facility Operations And Maintenance Wastewater Reduction and Treatment. Steam Draygon evaporators can be used to reduce the volume of wastewater from many building and equipment maintenance operations, including: Air compressor condensate wastewater, air scrubber blow-down wastewater, boiler blow-down wastewater, cooling tower wastewater, floor scrub wastewater, machine cleaning wastewater, steam cleaning wastewater, pressure washing wastewater, storm runoff wastewater, heavy equipment cleaning wastewater.