An exhaust gas processing apparatus for absorbing gas by creating contact between gas and liquid, the apparatus comprising: an absorbing tower main body in which an internal space is formed; a spray apparatus, disposed on a central axis of the absorbing tower main body, for spraying liquid in a prescribed region of the internal space; and a gas supply apparatus for introducing gas into the absorbing tower main body at a position below the region where the spray apparatus is configured to spray liquid such that the gas rises up inside the absorbing tower main body while revolving so as to follow a perimeter wall section of the absorbing tower main body, wherein the spray apparatus has: a trunk pipe extending in an up/down direction in a prescribed region of the internal space; branch pipes coupled to the trunk pipe and extending towards an inner wall of the absorbing tower main body; and spray nozzles for spraying liquid supplied from the branch pipes; and the spray nozzles are installed such that an angle formed between the center line of the spray region of the spray nozzles and the lengthwise direction of the branch pipes is an acute angle, characterized in that a plurality of the spray nozzles are provided on each branch pipe, and the angle of installation of at least one spray nozzle of the plurality of spray nozzles is an acute angle. an absorbing tower main body in which an internal space is formed; a spray apparatus, disposed on a central axis of the absorbing tower main body, for spraying liquid in a prescribed region of the internal space; and a gas supply apparatus for introducing gas into the absorbing tower main body at a position below the region where the spray apparatus is configured to spray liquid such that the gas rises up inside the absorbing tower main body while revolving so as to follow a perimeter wall section of the absorbing tower main body, wherein the spray apparatus has: a trunk pipe extending in an up/down direction in a prescribed region of the internal space; branch pipes coupled to the trunk pipe and extending towards an inner wall of the absorbing tower main body; and spray nozzles for spraying liquid supplied from the branch pipes; and the spray nozzles are installed such that an angle formed between the center line of the spray region of the spray nozzles and the lengthwise direction of the branch pipes is an acute angle, characterized in that a plurality of the spray nozzles are provided on each branch pipe, and the angle of installation of at least one spray nozzle of the plurality of spray nozzles is an acute angle. a trunk pipe extending in an up/down direction in a prescribed region of the internal space; branch pipes coupled to the trunk pipe and extending towards an inner wall of the absorbing tower main body; and spray nozzles for spraying liquid supplied from the branch pipes; and the spray nozzles are installed such that an angle formed between the center line of the spray region of the spray nozzles and the lengthwise direction of the branch pipes is an acute angle, characterized in that a plurality of the spray nozzles are provided on each branch pipe, and the angle of installation of at least one spray nozzle of the plurality of spray nozzles is an acute angle.