Incinerator with a bowl-shaped grate

An incinerator comprising:

• a peripheral wall that defines a combustion chamber therein, that has a vertically extending portion and a top end, and that is formed with an inlet adjacent to said top end and adapted to permit entry of air flow therethrough and into said combustion chamber, and an outlet disposed below said inlet and adapted to permit discharge of combustion gases therefrom;
• a bowl-shaped grate adapted to receive combustible waste therein and mounted in said combustion chamber at a level between said inlet and said outlet in such a manner to permit air flow from said inlet to pass downwardly through the combustible waste in said bowl-shaped grate toward said outlet, said bowl-shaped grate being spaced apart from and cooperating with said vertically extending portion of said peripheral wall to define a circulating space therebetween, and having a bottom end;
• a plurality of laterally extending baffles, each of which extends laterally from said bottom end of said bowl-shaped grate to said vertically extending portion of said peripheral wall;
• a plurality of vertically extending baffles, each of which is disposed between said vertically extending portion of said peripheral wall and said bowl-shaped grate above said laterally extending baffles to divide said circulating space into a downward-flowing zone between said vertically extending baffles and said vertically extending portion of said peripheral wall and an upward-flowing zone between said vertically extending baffles and said bowl-shaped grate, each of said vertically extending baffles being spaced apart from an adjacent one of said laterally extending baffles to define a gap therebetween so as to permit fluid communication between said downward-flowing and upward-flowing zones;
• and
• an ash tray mounted in said combustion chamber at a level between said bottom end of said bowl-shaped grate and said outlet.