Photochemical flow tube device

The invention discloses a photochemical flow tube device. The photochemical flow tube device comprises: a reaction assembly, wherein the reaction assembly is a reaction chamber or a plurality of reaction chambers connected in a sectional manner, and a reaction chamber outer cover is arranged outside the reaction chamber(s), and surrounds the reaction chamber(s) to form an isolating layer for simulating illumination and cooling; a sheath gas protection assembly, wherein the sheath gas protection assembly is arrange at one end of the reaction assembly and is used for introducing a sheath gas into the reaction chamber, and the sheath gas forms a laminar flow protection layer surrounding the wall of the reaction chamber(s); a sample gas inlet assembly, wherein the sample gas inlet assembly isarranged at one end of the reaction assembly, is located inside the sheath gas protection assembly and is used for introducing a sample gas into the reaction chamber(s), and the sample gas is placed alaminar flow protection l