Gas purification techniques
| Gas scrubber are cleanings installations in which the gas flow is brought in intensive contact with a fluid which as aim to remove gaseous components from the gas to the fluid. Gas scrubber can be applied as emission control technique at various gaseous emissions. Gas scrubbing is also called absorption. |
At gas scrubbers there therefore talk of a transition of components of the gas phase to the Liquid phase. The degree in which is possible to convert gaseous components to the fluid phase depends on solubility on these components in the fluid. The balance concentration at the mist stage which belongs to a certain concentration at the fluid stage depends on the temperature, a higher temperature of the fluid phase results in a higher balance concentration at the mist stage. Lowering of the temperature has therefore also a favorable impact on the output. By adding chemicals to the carrier fluid in which absorbed components are converted, the load can increase. Adding of chemicals that can react with the absorbed gases has a favorable impact on the absorption output has.
Beside water (wet scrubbers) also organic fluids are used as an absorption means. In many cases chemicals or micro-organism are added to the carrier fluid to put or neutralize the gases which are solved in the fluid (conditioned scrubber). By this conversion the concentration in water becomes lower and more of the gasses can solve (according to the law of Henry). In practice gas scrubber exist from three components: an absorption section for substance exchange, demister and a recirculation tank with pump.
The liquid gas ratio L/G of the gas scrubber is the proportion between the flow of the carrier fluid
Gas scrubbers are mainly applied in the chemical - and pharmaceutical
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