Abstract: A tubular pressurized catalytic hydrocarbon converter provided with a cylindrical casing (1) containing vertical gas exhaust pipes (4) around which are arranged reaction tubes (2) which are coaxially placed in sleeves (3). The lower portions of these tubes are connected to the vertical pipes by "pig-tails" and have a novel design since the aim is to increase the converter's reliability and working life by eliminating reaction tube deformation and facilitating "pig-tail" assembly and maintenance. To this end, the converter is provided with a transverse wall attached to the lower ends of the sleeves and provided with openings in which the lower ends of the tubes and vertical pipes are freely inserted. It is also provided with plates (7) having movable covers (8) and attached to the lower ends of the vertical pipes which are in turn connected to the "pig-tails".

Abstract: The invention relates to contact trays with a self adjusting free section for rectification and absorption tray columns in gas (steam)-fluid systems operating in a wide range of gas (steam) loads. The contact tray comprises a base with apertures in every one of which a valve is mounted providing a one-way outlet of gas and having an upper wall, side walls, and position limiters to define the upper (open) and lower (closed) positions of the valve. Every valve is manufactured from a blank made in the form of a circular sector with a truncated apex, whose peripheral side and segment portions are bent to form side walls of the valve, one of the lower position limiters and the upper wall of the valve. This makes it possible to simplify the technology of manufacturing valves, improve the conditions of operation and raise the efficiency of the tray.