Gas dedusting filter apparatus and process
AssigneeEcospray Technologies S.r.l.
InventorsMaurizio Archetti, Luca Muratori
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Abstract
The present invention relates to a filter apparatus (1) for dedusting gas comprising one or more electrostatic precipitators (100), in each of said electrostatic precipitators (100) there being inserted at least one filtering unit (300) comprising, in turn, a plurality of filtering cells (301), e.g. of the wall flow type. The present invention also relates to a dedusting process for treating industrial gas. In particular, the dedusting process according to the present invention implemented by the filter apparatus having improved dusting efficiency, which is the object of the present invention, allows the treatment of gas coming from industrial processes, such as coal boilers, cement works, incinerators and like.
Claims16
A filter apparatus for dedusting gas coming from industrial processes or plants comprising:
- an electrostatic precipitator;
- and
- a filtering unit housed in the electrostatic precipitator, the filtering unit comprising a plurality of filtering cells arranged to form a filtering wall adapted to be struck by a flow of gas inside the electrostatic precipitator, the filtering unit comprising:
- a regeneration system for the plurality of filtering cells, the regeneration system comprising:
- a device for conveying or delivering a washing fluid to the plurality of filtering cells in counterflow with respect to the flow of the gas in the electrostatic precipitator;
- and
- a collecting or conveying device for collecting or conveying washing fluid escaping from the plurality of filtering cells following washing by the washing fluid, wherein the collecting or conveying device comprises a plurality of Venturi tubes positioned upstream from a corresponding one of the plurality of filtering cells with respect to the flow of the gas in the electrostatic precipitator and configured to increase speed of the washing fluid escaping from the corresponding one of the plurality of filtering cells.
A gas dedusting process comprising:
- providing a filtering apparatus comprising:
- an electrostatic precipitator;
- and
- a filtering unit housed in the electrostatic precipitator, the filtering unit comprising a plurality of filtering cells arranged to form a filtering wall adapted to be struck by a flow of gas inside the electrostatic precipitator, the filtering unit comprising:
- a regeneration system for the plurality of filtering cells, the regeneration system comprising:
- a device for conveying or delivering a washing fluid to the plurality of filtering cells in counterflow with respect to the flow of the gas in the electrostatic precipitator;
- and
- a collecting or conveying device for collecting or conveying washing fluid escaping from the plurality of filtering cells following washing by the washing fluid, wherein the collecting or conveying device comprises a plurality of Venturi tubes positioned upstream from a corresponding one of the plurality of filtering cells with respect to the flow of the gas in the electrostatic precipitator and configured to increase speed of the washing fluid escaping from the corresponding one of the plurality of filtering cells;
- electrostatic filtering the gas by the electrostatic precipitator;
- filtering the gas by the filtering wall comprising the plurality of filtering cells;
- regenerating the plurality of filtering cells of the filtering unit by sending a washing fluid to the plurality of filtering cells in counterflow with respect to the flow of the gas in the electrostatic precipitator, and collecting or conveying the washing fluid escaping from the plurality of filtering cells following washing by the washing fluid.
Dependencies are inferred from the claim text.