Our Nodora packed wet scrubber systems operate based on the a uniform configuration across all AirMist models. We utlize an internal circulation loop along with a balanced scrubber liquid feed to maximize liquid-gas mass transfer absorption rates and allows for independent nozzle flows regulation and fine tuned capacity controls. This also enables easy insertion of auxiliary systems such as ozonation or chemical dosing, totally separated from the scrubbing feed and drain rates.

Automation and controls

Scrubbers are often chosen because of their robust operation and reliable performance. However, some operational target values, depending on the expected results and pollutant type, should be considered.

L/G ratio: the L/G ratio is often crucial in adapting current operating conditions and feed gas. Typically, the L/G ratio, which is the ratio between the scrubbing liquid (L) internal circulation (in L/h) and the gas (G) feed flow (m3/h) is controlled between 3-9. Controlling L/G ratios directly affect the absorption rates where pollutants are transferred from gas phase to liquid phase.

pH: automatic dosing of pH is crucial for achieving a balanced chemical reaction once the gas is scrubbed into the scrubbing liquid.

Chemical dosing: depending on the nutrient and organic content which accumulates in the liquid phase during operation, chemical dosing of biocides may be necessary to prevent microbial growth. Ozonation is a recommended alternative for such situations as additional chlorides or other chemicals will not contribute to further accumulation of dissolved organics or inorganics.

Feed water: inevitably accumulation of pollutants will occur in the scrubbing liquid – the rate of which depends on many factors such as feed gas particulate matter (PM), volatile organics, the level of gas-liquid scrubbing achieved and the feed water rate. Highly contaminated gas will require both higher L/G ratios and fresh feed liquid to avoid microbial growth or clogging.