A volatile organic compounds refining apparatus comprising: a vacuum container: a liquid feeding pump that supplies a VOC-containing liquid including water into the vacuum container; a spraying device that is disposed in the vacuum container and sprays the VOC-containing liquid supplied from the liquid feeding pump into the vacuum container; a vacuum pump that is connected to the vacuum container and depressurizes an inside of the vacuum container to vacuum-evaporate moisture included in the VOC-containing liquid; and a liquid discharge member adapted to discharge a VOC-concentrated liquid after moisture evaporation processing from the vacuum container, wherein the spraying device includes a spraying device main body that has a liquid passageway and a gas passageway, an inner lid that is disposed at a tip of the spraying device main body, covers an opening of the liquid passageway, and has a flat inner end portion, an outer lid that is disposed at the tip of the spraying device main body, covers the inner lid, covers an opening of the gas passageway, and has a flat outer end portion facing the inner end portion of the inner lid, a gas-liquid mixing section that is disposed between the inner lid and the outer lid, is formed at a space of a disc-shaped profile between the inner end portion of the inner lid and the outer end portion of the outer lid, and mixes a gas flow flowing through the gas passageway and a liquid flow flowing through the liquid passageway, a liquid inlet that is provided so as to penetrate at least one portion of the inner end portion of the inner lid in a circumferential direction, communicates with the gas-liquid mixing section, and allows a liquid flow flowing through the liquid passageway to enter the gas-liquid mixing section, a gas inlet that is disposed so as to communicate with the gas-liquid mixing section on a side portion of the gas-liquid mixing section between the inner lid and the outer lid, and allows the gas flow flowing through the gas passageway to enter the gas-liquid mixing section toward the liquid flow entering the gas-liquid mixing section from the liquid inlet, and a spout that is provided so as to penetrate the outer end portion of the outer lid, communicates with the gas-liquid mixing section, and spouts a liquid atomized by mixing the gas flow and the liquid flow in the gas-liquid mixing section. a vacuum container: a liquid feeding pump that supplies a VOC-containing liquid including water into the vacuum container; a spraying device that is disposed in the vacuum container and sprays the VOC-containing liquid supplied from the liquid feeding pump into the vacuum container; a vacuum pump that is connected to the vacuum container and depressurizes an inside of the vacuum container to vacuum-evaporate moisture included in the VOC-containing liquid; and a liquid discharge member adapted to discharge a VOC-concentrated liquid after moisture evaporation processing from the vacuum container, a liquid feeding pump that supplies a VOC-containing liquid including water into the vacuum container; a spraying device that is disposed in the vacuum container and sprays the VOC-containing liquid supplied from the liquid feeding pump into the vacuum container; a vacuum pump that is connected to the vacuum container and depressurizes an inside of the vacuum container to vacuum-evaporate moisture included in the VOC-containing liquid; and a liquid discharge member adapted to discharge a VOC-concentrated liquid after moisture evaporation processing from the vacuum container, wherein the spraying device includes a spraying device main body that has a liquid passageway and a gas passageway, an inner lid that is disposed at a tip of the spraying device main body, covers an opening of the liquid passageway, and has a flat inner end portion, an outer lid that is disposed at the tip of the spraying device main body, covers the inner lid, covers an opening of the gas passageway, and has a flat outer end portion facing the inner end portion of the inner lid, a gas-liquid mixing section that is disposed between the inner lid and the outer lid, is formed at a space of a disc-shaped profile between the inner end portion of the inner lid and the outer end portion of the outer lid, and mixes a gas flow flowing through the gas passageway and a liquid flow flowing through the liquid passageway, a liquid inlet that is provided so as to penetrate at least one portion of the inner end portion of the inner lid in a circumferential direction, communicates with the gas-liquid mixing section, and allows a liquid flow flowing through the liquid passageway to enter the gas-liquid mixing section, a gas inlet that is disposed so as to communicate with the gas-liquid mixing section on a side portion of the gas-liquid mixing section between the inner lid and the outer lid, and allows the gas flow flowing through the gas passageway to enter the gas-liquid mixing section toward the liquid flow entering the gas-liquid mixing section from the liquid inlet, and a spout that is provided so as to penetrate the outer end portion of the outer lid, communicates with the gas-liquid mixing section, and spouts a liquid atomized by mixing the gas flow and the liquid flow in the gas-liquid mixing section.