Film distribution device of falling-film evaporator used for concentration of caustic soda and caustic soda flakes

The utility model discloses a film distribution device of a falling-film evaporator used for concentration of caustic soda and caustic soda flakes. The film distribution device comprises a falling-film concentration pipe, wherein the upper end of the falling-film concentration pipe extends into an alkali liquor inlet pipe box; an alkali liquor inlet is formed in the alkali liquor inlet pipe box; and a plurality of film distribution grooves are uniformly formed in the circumference of the upper end of the falling-film concentration pipe in the alkali liquor inlet pipe box, and every film distribution groove penetrates through the wall of the falling-film concentration pipe and is in the same rotating direction and formed in the tangent direction of the falling-film concentration pipe. The film distribution device of the falling-film evaporator used for concentration of caustic soda and caustic soda flakes has the advantages that the structure is simple and practical; and the film distribution grooves are forme