An exhaust gas abatement system, comprising: an exhaust gas abatement section configured to abate exhaust gases by utilizing thermal energy and to cool the abated gases by using a liquid; a circulating section configured to circulate the liquid within a circulation path as a circulating liquid; a heat exchange tube configured to cool the circulating liquid and to execute a heat exchange between a cooling liquid which flows in an interior of the heat exchange tube and the circulating liquid which flows outside the heat exchange tube; and a circulating liquid storage portion configured to store the circulating liquid, wherein the heat exchange tube is disposed in a heat exchange tube installation space which is at least part of an interior of the circulating liquid storage portion, a wall surface of the circulating liquid storage portion doubles as a casing of a heat exchanger, whereby the heat exchange tube and the circulating liquid storage portion constitute the heat exchanger, the heat exchange tube installation space is formed as a serpentine channel in which the circulating liquid flows in a serpentine fashion, and the heat exchange tube is disposed along the serpentine channel; the circulating liquid storage portion is divided into a first chamber and a second chamber by a dam, the exhaust gas abatement section is configured such that the liquid used on an upstream side of a flow path of the exhaust gases through the exhaust gas abatement section flows into the first chamber, while the liquid used on a downstream side of the flow path of the exhaust gases flows directly into the second chamber, the circulating liquid which overflows from the first chamber by passing over the dam flows into the second chamber, the heat exchange tube installation space is in the second chamber, a first filter is provided in the first chamber, and the liquid that flows into the first chamber permeates through the first filter and thereafter flows into the second chamber. an exhaust gas abatement section configured to abate exhaust gases by utilizing thermal energy and to cool the abated gases by using a liquid; a circulating section configured to circulate the liquid within a circulation path as a circulating liquid; a heat exchange tube configured to cool the circulating liquid and to execute a heat exchange between a cooling liquid which flows in an interior of the heat exchange tube and the circulating liquid which flows outside the heat exchange tube; and a circulating liquid storage portion configured to store the circulating liquid, wherein the heat exchange tube is disposed in a heat exchange tube installation space which is at least part of an interior of the circulating liquid storage portion, a wall surface of the circulating liquid storage portion doubles as a casing of a heat exchanger, whereby the heat exchange tube and the circulating liquid storage portion constitute the heat exchanger, the heat exchange tube installation space is formed as a serpentine channel in which the circulating liquid flows in a serpentine fashion, and the heat exchange tube is disposed along the serpentine channel; the circulating liquid storage portion is divided into a first chamber and a second chamber by a dam, the exhaust gas abatement section is configured such that the liquid used on an upstream side of a flow path of the exhaust gases through the exhaust gas abatement section flows into the first chamber, while the liquid used on a downstream side of the flow path of the exhaust gases flows directly into the second chamber, the circulating liquid which overflows from the first chamber by passing over the dam flows into the second chamber, the heat exchange tube installation space is in the second chamber, a first filter is provided in the first chamber, and the liquid that flows into the first chamber permeates through the first filter and thereafter flows into the second chamber.