Falling film head improved structure of falling film reboiler

The invention relates to a falling film head improved structure of a falling film reboiler. The falling film head improved structure of the falling film reboiler comprises a cylinder body, a tube plate and a sealing head; a first tube nest is fixed on the upper part of the tube plate through a screw fixing structure; a second tube nest is fixed above the first tube sheet through a connecting plate; the first tube nest, the second tube nest and the tube plate are parallel; small holes of the first tube nest are opposite to the hole bridges of the tube plate; small holes of the second tube nestare opposite to holes of the tube plate; the top end of the sealing head is provided with a feeding flange; the end part, extending inside the sealing head, of the feeding flange is provided with a feeding baffle; and small holes are uniformly distributed in the feeding baffle. According to the falling film head improved structure of the falling film reboiler, an original falling film head is improved to have distribution