GB734254A - Tray deck for fluid contact columns - Google Patents

Abstract

734,254. Contacting gases with liquids. NAAMLOOZE VENNOOTSCHAP DE BATAAFSCHE PETROLEUM MAATSCHAPPIJ. Oct. 23, 1953 [Oct. 25, 1952], No. 29411/53. Class 55 (2). A tray deck for a gas-liquid contact column 10 (Fig. 2) comprises a number of parallel spaced beams 21 extending across the column and supported at their ends by an annular flange 20 secured, e.g. by welding, to the shell of the column and a plurality of deck sections 28 which extend transversely between adjacent beams 21 and which have along their transverse edges downwardly projecting stiffening flanges 39 (Fig. 6) extending between the beams. The deck is completed by deck sections 29 which rest partly on a beam 21 and partly on the flange 20, the edges of the sections 29 adjacent the shell being curved. The beams 21 are secured to the flange 20 as shown in Fig. 4 by clamping members 22 and 23 secured together by a bolt 24 which may pass through a hole in the top flange 21a of a beam or as shown the upper flange may be notched to accommodate the stem of the bolt. The deck sections 28 and 29 may be made of light gauge sheet metal, e.g. of stainless steel, nickel or "Monel" metal, (R.T.M.) and are of such sizes that a space is left between adjacent sections 28 on the beams 21 and between the sections 29 and the shell of the column 10 to allow for expansion. The sections have series of punchedout slots 46 with sharp or rounded corners to provide an aggregate slot area of between 7 and 50 per cent of the total tray area. The sections 28 (Fig. 6) have centrally disposed reinforcements 38 secured to their undersides and the transverse marginal edges of the sections are bent downwardly to form the stiffening flanges 39 and may also have a tip 40 turned inwardly from a flange 39 under a reinforcement 38. The longitudinal edges of the sections 38 extend beyond the flanges 39 as shown at 36 and 37. The sections 29 are of similar construction except that they have only one transverse stiffened edge and the reinforcements 38 stop short of the curved edges of the sections. The sections 28 and 29 are secured (Fig. 4) to the beams 21 by bolts 27 and washers 31, the washers being of such size as to overlie the marginal portions of adjacent sections and the seams of the bolts passing between the sections which are notched for this purpose if necessary. A section 28a (Fig. 2) is provided in each tray deck to serve as a man-way and is secured by fasteners 35 having removable nuts at both ends of a threaded bolt to a central portion of which is secured a plate adapted to lie between adjacent longitudinal edges and prevent rotation of the fastener. Reference has been directed by the Comptroller to Specification 628,311.