PROBLEM TO BE SOLVED: To provide a supply device for supplying carbon dioxide containing gas and heat to a crop cultivation house, capable of removing a sulfur oxide, nitrogen oxide, carbon monoxide and ethylene in combustion exhaust gas generated by combusting a fuel, which are harmful for crops, and supplying the purified exhaust gas as a carbon dioxide containing gas for promoting growth of plants to a crop production facility.SOLUTION: A supply device of the invention comprises: a sulfur oxide removal device 3 for removing a sulfur oxide included in an exhaust gas; a dust collector 4 for collecting smoke dusts included in the exhaust gas; a nitrogen oxide removal device 5 for removing a nitrogen oxide included in the exhaust gas; a carbon monoxide and ethylene removal device 8 for removing carbon monoxide and ethylene included in the exhaust gas by an oxidation catalyst; a purification gas supply device 9 for supplying the purified exhaust gas to the crop production facility 11; and catalyst activity recovery means 31, 32 for removing tar mist adhered to the oxidation catalyst of the carbon monoxide and ethylene removal device 8.SELECTED DRAWING: Figure 3COPYRIGHT: (C)2019,JPO&INPIT【課題】燃料を燃焼した燃焼排ガス中の作物に有害な硫黄酸化物、窒素酸化物、一酸化炭素及びエチレンを除去し、浄化した排ガスを作物生産用施設に植物成長を促進する二酸化炭素含有ガスとして供給することができる作物栽培ハウスへの二酸化炭素含有ガスと熱を供給する供給装置を提供する。【解決手段】本発明の供給装置は、排ガスに含まれる硫黄酸化物を除去する硫黄酸化物除去装置3と、排ガスに含まれる煤塵を捕集する集塵装置4と、排ガスに含まれる窒素酸化物を除去する窒素酸化物除去装置5と、排ガスに含まれる一酸化炭素とエチレンを酸化触媒により除去する一酸化炭素及びエチレン除去装置8と、浄化された排ガスを作物生産用施設11へ供給する浄化ガス供給装置9と、一酸化炭素及びエチレン除去装置8の酸化触媒に付着したタールミストを除去する触媒活性回復手段31,32と、を備える。【選択図】 図3