A fluid contact tray (10) for a fractionation column (1), in particular a vapor-liquid contact tray suitable for the use in an offshore fractionation column, comprises: a tray deck (12) comprising an active mass transfer surface (20) suitable for contacting two fluids (l, g) of different densities, wherein the active mass transfer surface (20) comprises one or more orifices (18) for the passage of a fluid/gas (g), and wherein at least two at least partially radially extending separation walls (22-1, 22-2, 22-3, 22-4) and/or at least one separation weir (42) are arranged on the active mass transfer surface (20), which divides the active mass transfer surface (20) into at least two sections (24-1, 24-2, 24-3, 24-4), an annular channel (26) suitable for collecting fluids/liquids (l), which is arranged at the peripheral area of the active mass transfer surface (20) and at least partially embraces the mass transfer surface (20), a central downcomer (34) for collecting and discharging a fluid/liquid (l) from the annular channel (26), wherein the central downcomer (34) has the form of a hollow body with an opening (36) in the bottom section thereof being suitable for the distribution of liquid vertically downwardly, and wherein the central downcomer (34) is non-rotatably fixed at the fluid contact tray (10), and at least one conducting means (40) for transferring fluid collected in the annular channel (26) from the annular channel (26) to the central downcomer (34). This fluid contact tray (10) is in particular useable for offshore applications, such as for a fractionation column located on a FLNG or FPSO vessel.

What is described relates to cross-flow packing heat and mass transfer column vessels, where rectifying separation of liquid-vapor mixtures, distillation of liquid-vapor mixtures, and absorptive separation of liquid-vapor mixtures occur, and may be used in oil-refining, petrochemical, chemical, gas, food, and other industries. The proposed mass transfer column with cross flow of liquid and gas (vapor) phases includes shell, feed nozzle, distillate and residue withdrawal nozzles, nozzles of injection and withdrawal of auxiliary flows, cross-flow packing sections separated heightwise by horizontal baffles having, successively, in direction of gas (vapor) phase, in normal shell cross section, a window for gas (vapor) flowing on packing section inlet side and continuous area on packing section outlet side, which alternate on horizontal baffles neighboring by height, with liquid distributors between packing adjacent sections and above packing upper section, which consist of three successively mating parts: horizontal leaf, set of steps, and blind pocket.

What is described relates to cross-flow packing heat and mass transfer column vessels, where rectifying separation of liquid-vapor mixtures, distillation of liquid-vapor mixtures, and absorptive separation of liquid-vapor mixtures occur, and may be used in oil-refining, petrochemical, chemical, gas, food, and other industries. The proposed mass transfer column with cross flow of liquid and gas (vapor) phases includes shell, feed nozzle, distillate and residue withdrawal nozzles, nozzles of injection and withdrawal of auxiliary flows, cross-flow packing sections separated heightwise by horizontal baffles having, successively, in direction of gas (vapor) phase, in normal shell cross section, a window for gas (vapor) flowing on packing section inlet side and continuous area on packing section outlet side, which alternate on horizontal baffles neighboring by height, with liquid distributors between packing adjacent sections and above packing upper section, which consist of three successively mating parts: horizontal leaf, set of steps, and blind pocket.

The invention relates to a gas-distributing tray (20) for a column for exchange of heat and/or of material between a gas and a liquid, comprising several protruding chimneys (80) which are substantially parallelepipedal and parallel to one another over a portion (21) of the upper face of the tray for the exclusive passage of the gas (g) through the tray and a zone for collecting the liquid (90) comprising two diametrically opposite weirs (91, 92) for collecting the said liquid (l) on the said tray. The chimneys each comprise an element for distribution of the gas (82) partially overlapping the zone for collecting the said liquid.

The invention also relates to an exchange column comprising such a distributing tray and to the use of such a column.

A system for chemical compounds collection, deposition and separation in a fluid stream includes: a stack of layers with a number of window openings, allowing the fluid stream to pass through, neighboring layers forming an angle 0<90, the angle and the distance between neighboring layers being variable and controlled, so as to control the velocity of the fluid stream; spreading apertures in between the layers, and adapted to spray liquid chemical solution inside the closed volume, so as to create a thin film on the surfaces of the layers and lateral walls of the closed volume; a system for generating droplets of chemical solution upstream of the stack, to be mixed in the fluid stream; particles of the chemical compounds being collected by impaction with the droplets, and by diffusion on the thin film, and counter flowing with the chemical solution.

A system for chemical compounds collection, deposition and separation in a fluid stream includes: a stack of layers with a number of window openings, allowing the fluid stream to pass through, neighboring layers forming an angle 0<90, the angle and the distance between neighboring layers being variable and controlled, so as to control the velocity of the fluid stream; spreading apertures in between the layers, and adapted to spray liquid chemical solution inside the closed volume, so as to create a thin film on the surfaces of the layers and lateral walls of the closed volume; a system for generating droplets of chemical solution upstream of the stack, to be mixed in the fluid stream; particles of the chemical compounds being collected by impaction with the droplets, and by diffusion on the thin film, and counter flowing with the chemical solution.

The invention is a distributor tray for at least one a gas/liquid heat and a material exchange column comprising passages for passing gas through the tray. The tray has an upper plate (P1) and a lower plate (P2) with each plate having at least two distinct liquid passages. The openings (10 and 11) of the upper plate (P1) are positioned at distinct elevations with at least one of the liquid passages (10) of upper plate (P1) having a lower elevation communicating with one of the liquid passages of the lower plate through a supply line (9). The invention also relates to a gas/liquid heat and/or material exchange column equipped with a distributor tray (2) in accordance with the invention and to a floating barge having a column and to the use of the column.

The invention is a distributor tray for at least one a gas/liquid heat and a material exchange column comprising passages for passing gas through the tray. The tray has an upper plate (P1) and a lower plate (P2) with each plate having at least two distinct liquid passages. The openings (10 and 11) of the upper plate (P1) are positioned at distinct elevations with at least one of the liquid passages (10) of upper plate (P1) having a lower elevation communicating with one of the liquid passages of the lower plate through a supply line (9). The invention also relates to a gas/liquid heat and/or material exchange column equipped with a distributor tray (2) in accordance with the invention and to a floating barge having a column and to the use of the column.

The invention relates to cross-flow packing heat and mass transfer column vessels, where rectifying separation of liquid-vapour mixtures, distillation of liquid-vapour mixtures, and absorptive separation of liquid-vapour mixtures occur, and may be used in oil-refining, petrochemical, chemical, gas, food, and other industries.

The proposed mass transfer column with cross flow of liquid and gas (vapour) phases of PETON system includes a shell, a feed nozzle, distillate and residue withdrawal nozzles, nozzles of injection and withdrawal of auxiliary flows, cross-flow packing sections separated heightwise by horizontal baffles having, successively, in the direction of gas (vapour) phase, in the normal shell cross section, a window for gas (vapour) flowing on the packing section inlet side and a continuous area on the packing section outlet side, which alternate on the horizontal baffles neighbouring by height, with liquid distributors between the packing adjacent sections and above the packing upper section, which consist of three successively mating parts: a horizontal leaf, a set of steps, and a blind pocket.

The invention allows achieving the objective of development of a highly efficient mass transfer column that allows for a dramatic variation of the liquid phase flow rates, which ensures a considerable extension of the vessel stable operation range as well as the possibility to use the contact devices with a different number of flows in one vessel.

The invention relates to cross-flow packing heat and mass transfer column vessels, where rectifying separation of liquid-vapour mixtures, distillation of liquid-vapour mixtures, and absorptive separation of liquid-vapour mixtures occur, and may be used in oil-refining, petrochemical, chemical, gas, food, and other industries.

The proposed mass transfer column with cross flow of liquid and gas (vapour) phases of PETON system includes a shell, a feed nozzle, distillate and residue withdrawal nozzles, nozzles of injection and withdrawal of auxiliary flows, cross-flow packing sections separated heightwise by horizontal baffles having, successively, in the direction of gas (vapour) phase, in the normal shell cross section, a window for gas (vapour) flowing on the packing section inlet side and a continuous area on the packing section outlet side, which alternate on the horizontal baffles neighbouring by height, with liquid distributors between the packing adjacent sections and above the packing upper section, which consist of three successively mating parts: a horizontal leaf, a set of steps, and a blind pocket.

The invention allows achieving the objective of development of a highly efficient mass transfer column that allows for a dramatic variation of the liquid phase flow rates, which ensures a considerable extension of the vessel stable operation range as well as the possibility to use the contact devices with a different number of flows in one vessel.