Grid falling film devolatilizer

A grid falling film devolatilizer, consisting of a tower housing (1), a liquid distributor (2) and a tower internal (3), wherein the said tower housing has a round, square or rectangle cross section;

• the said tower internal consists of pillars (3-1) and multiple grid trays (3-2), and four pillars stand respectively at the four corners of the tower internal which has a square or rectangle cross-section;
• there may be a single one or multiple tower internals arranged parallely in the tower housing;
• the number of the grid trays is 2 to 500 and the layer interval between two neighbor grid plate layers is 20 to 500 mm;
• each grid tray comprises a pair of beams (3-2-1), a plurality of grid bars (3-2-2) and corresponding guide members (3-2-3);
• said beams are located at opposite pair of sides of the grid tray, in a horizontal plane of same height, and are fixed to the pillars;
• the grid bars are fixed perpendicularly to the beams and are arranged in single tier, double tiers or multiple tiers in a parallel manner;
• the grid bars have a cross-section of triangle, reverse “V” shape formed by bending thin metal strips, circle or other shapes;
• said guide members consist of the guide mesh (wires) (3-2-3-1) and the clamp (3-2-3-2) for fixation of the guide mesh (wires), and are disposed at the grid gap between the two neighboring grid bars and parallel to the grid bars, the corresponding clamps are fixed to the beams;
• the outmost grid bars in a grid tray are formed as inclines or bent strips (3-2-2′) which present a larger vertical surface and serve as baffles for keeping liquid level in grid tray;
• or the clamps of the outmost guide members in a grid tray are extended to be higher than others and serve as baffles for keeping the liquid level in grid tray.