Method for removing particulate matter and gases from a polluted gas stream

A method for removing particulate matter and gaseous pollutants from a polluted gas stream comprising the steps of, injecting a flow of electrostatically charged sorbent particles into a polluted gas stream, which said sorbent is selected for the particular pollutants in said gas stream with the volume of said sorbent particles selected for the quantity of pollutants in said gas stream and the charging voltage applied to said sorbent particles is variable to provide a maximum charge on each sorbent particle;

• passing the gas stream containing said charged sorbent particles into a transition section of a collection chamber housing, which said transition section widens from its inlet to its exhaust end, providing for a reduction in gas stream velocity passing therethrough causing heavy particulates to fall out of said gas stream;
• distributing said gas stream over and passing said gas stream through a first moving bed filter containing a media material that is maintained vertically in said collection chamber housing across said transition section exhaust end wherein agglomerized pollution and sorbent particulates are removed during passage through said media material, which said media material in said first moving bed upon sensing of a set pressure drop across said filter is changed for clean media material by operation of a rotary discharge valve that passes said media material out of a bottom end of said first moving filter bed, with clean media material passing from a media material hopper above said first moving filter bed through a top of said first moving filter bed, replenishing said media material as has passed through said rotary discharge valve;
• passing said gas stream through at least one additional moving filter bed containing a media material that is arranged vertically in said collection chamber housing, is opposite and parallel to said first moving filter bed and is essentially the same as and functions like said first moving filter bed, may include the same or different media material as used in said first moving filter bed and is for removing additional agglomerized pollution and sorbent particulates from said gas stream;
• passing said gas stream through a static filter bed that contains the same or different filter media material as used in the first and additional moving filter beds and is vertically maintained in said collection chamber housing parallel to and immediately opposite to a last of said additional moving filter beds, and said static filter bed media material is not changed during system operation and is to finally remove essentially all remaining pollution and sorbent particulates from said gas stream;
• and venting said gas stream as has passed from said static filter bed to atmosphere.