Flue-gas purification

A process development known as NOXSO (DuPont) (165,166) uses sodium to purify power plant combustion flue gas for removal of nitrogen oxide, NO, and sulfur, SO compounds. This technology reHes on sodium metal generated in situ via thermal reduction of sodium compound-coated media contained within a flue-gas purification device, and subsequent flue-gas component reactions with sodium. The process also includes downstream separation and regeneration of spent media for recoating and circulation back to the gas purification device. A full-scale commercial demonstration project was under constmction in 1995. 

The flue gas from post-combustion is cooled from 1200 °C to 230 °C to 300 C. Here, energy is recovered. Steam is produced that is added to the steam network of the BSL Schkopau site. In the flue gas purification, the HCl is absorbed from the flue gas by water. Also, other impurities are removed from the gas. The raw HCl is then purified to a useful feedstock. 

Consider a high-performance flue gas purification and abatement system... 

Improve general flue gas purification through the addition of limestone and activated carbon... 

If staging and countercurrent operation are essential, a slurry tray column and a rotating disk column can be applied [9]. In flue gas purification where a low pressure drop is essential, lime or CaCC>3 slurries are spray contacted with the gas phase. Sometimes it is meant to evaporate the water phase but also simple slurry scrubbing is envisaged. 

Potassium permanganate is utilized as an oxidizing agent in organic synthesis, for the removal of trace impurities (e.g. from lower aliphatic alcohols), for effluent and flue-gas purification, in the production of potable water, for the bleaching of inorganic and organic materials and for the purification of zinc sulfate solutions for zinc electrolysis. 

Formation during thermal treatment of refuse incinerator flue gas purification residues... 

Flue gas purification (SCR) removal of NO ,- with NH3 Ti, W,V mixed oxides as honeycomb bulk catalysts Ti, W,V oxides on inert honeycomb supports hot denitrification (400 °C) cold denitrification (300 °C... 

Flue gas purification (air pollution control, APC) refers to technologies used to condition a power plant s emissions after the combustion of fuel but before the release of gaseous and suspended particulate combustion by-products into the atmosphere. Each device or system corresponds to a given pollutant or category of pollutants to be removed from the flue gas stream. Reducing chemicals such as ammonia or urea, along with catalysts in the case of selective catalytic reduction (SCR) systems, are used to treat the exhaust to remove nitrogen oxides. 

Flue-gas purification Exhaust gases of power stations etc. Ni, O2, CO , SO ,NO etc. Hg from crematories, lsoto >es fiom nuclear power plants Clean flue gases Ni,0 .Hi0,C0 ... 

Reversible thermal regeneration using a) hot air (200 °C < T < 500 °C) or b) water vapor (T < 900 °C), Cycle period 1 h - 8 h Sorbent Activated carbon, zeolites Flue-gas purification Recovery of volatile solvents 20-40 30-60... 

Testing of metallic material concepts for the waste water evaporation of flue gas purification plants) (in German)... 

Multiple hearth combustion plants, as shown schematically in Fig. 10.15, are especially suitable for the combustion of moist and paste-like waste. They have been used for decades in the paper industry for energy production from primary and biological sludges, often together with bark. The flue gas purification plant downstream from the multiple hearth furnaces usually consists of wet scrubbers to remove dust and sulfur compounds. The flue gas finally enters the stack via a mist eliminator. 

The stringent emission standard of polychlorinated dioxins and furans can be met -without any additional measures in flue gas purification. 

Flue gas purification systems for power plants and waste incineration plants,... 

Becker, H., and Linde, G., 1985, The Linde Solinox Process for Flue-Gas Purification, Unde Reports on Science and Technology, Vol. 40, Linde Aktiengesellschaft. 

Kotler VR, Pein R. Reduction of waste gases without flue gas purification at thermal power plants (USA experience). Fuel Energy Abstr 1995 36 356—62 [in Russian]. 

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