Elektrische technieken voor gasreiniging; een evaluatie van toekomstige toepasbaarheid
report
In this study an evaluation is presented of the (future) applicability of electrical techniques for flue (gas) cleaning. In this context attention is given to five main systems, namely: — electro granular filtering; — electrical discharges; — electron radiation; — dielectric heating; — UV radiation. Each of these techniques is discussed in some detail; hence, actually there are some ten to twenty sub-techniques which in general can be applied either on a small or on a large scale. In electro granularfiltering (EGF) a granular filter (in general aluminium oxyde) is used; the filter efficiency is increased for submicron particles by the electrostá tica! charging of the grain material. A further improvement is effectuated by gui ding the contaminated gas through a corona discharge. By specific selection ofthe discharge - in particular by applying a positive streamer corona — it is moreover possible to decompose other substances, such as S02, NOx and hydrocarbons, through the generation of radicals. This combined effect opens the possibility to develop a cleaning method for (flue) gases which is cheaper than the total costs of partial conventional methods of gas cleaning. The system is in an advanced stage of (laboratory) development. In this context from the various types of grain beds available - fixed, moving, fluidised and sintered - the latter one appears to be most promising.
Topics
TNO Identifier
252832
Publisher
TNO
Collation
120 p.
Place of publication
Apeldoorn