Flue-gas desulfurization (FGD)

Since wet scrubbers vary greatly in complexity and method of operation, devising categories into which all of them neatly fit is extremely difficult. Scrubbers for particle collection are usually categorized by the gas-side pressure drop of the system. Gas-side pressure drop refers to the pressure difference or pressure drop, that occurs as the exhaust gas is pushed or pulled through the scrubber, disregarding the pressure that would be used for pumping or spraying the liquid into the scrubber.

Wet scrubbers can also be categorized by the manner in which the gas and liquid phases are brought into contact. Scrubbers are designed to use power, or energy, from the gas stream or the liquid stream, or some other method to bring the pollutant gas stream into contact with the liquid.

Many chemicals can be removed from the exhaust gas by using absorber material. The flue gas is passed through a cartridge which is filled with one or several absorber materials and has been adapted to the chemical properties of the components to be removed. This type of scrubber is sometimes also called dry scrubber. The absorber material has to be replaced after its surface is saturated.

Flue-gas desulfurization (FGD) is a set of technologies used to remove sulfur dioxide (SO2) from exhaust flue gasses of fossil-fuel power plants, and from the emissions of other sulfur oxide emitting processes.

As stringent environmental regulations regarding SO2 emissions have been enacted in many countries, SO 2 is now being removed from flue gasses by a variety of methods.

  • Wet scrubbing using a slurry of alkaline sorbent, usually limestone or lime, or seawater to scrub gasses;
  • Spray-dry scrubbing using similar sorbent slurries;
  • Wet sulfuric acid process recovering sulfur in the form of commercial quality sulfuric acid;
  • SNOX Flue gas desulphurisation removes sulfur dioxide, nitrogen oxides, and particulates from flue gasses;
  • Dry sorbent injection systems.

The Scroiler has a number of advantages over other types of scrubbers:

  1. Compact. Scroiler™ can be produced in any cross section shape to fit any industrial system design that exists or is in a project.
  2. Omnivorous. Scroiler™ can use contaminated water for cleaning. Cleaning water could be highly mineralized (up to 250 g of salts in 1 liter of water) or could contain sand, even small rocks.
  3. Ecologically clean. Scroiler™ can reuse the waste water from the sump.
  4. Economical. Scroiler™ has no elements which require replacement during operation such as nozzles or necks. Unlike wet air scrubbers the core components of Scroiler can be made of plastic and there is no need to replace them.
  5. Low-maintenance. In most of the cases, there is no need to interrupt Scroiler’s operation for at least 5 years.

Please feel free to e-mail if you would like to learn more about Scroiler™. Also, we would like to answer all your questions concerning Optromix Company products: info@optromix.com

 

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