A valve-tray assembly and method for lighter fluid heavier fluid contact towers. The active area of the tray is constructed with valves having multiple lighter fluid discharge areas facilitating improved mass transfer efficiency. The valves include first and second support legs oriented in line with the heavier fluid flow with both legs and the valve top constructed with apertures wherein the heavier fluid may flow into engagement with the lighter fluid passing from beneath the tray up, through and out of the valve.

A fractionation column can be used to separate a liquid containing multiple components into its constituent components based on vapor pressure. While the fractionation column may be designed for certain operational performance, the operational characteristics may change, for example, due to changed flow rates through the column and/or fouling in the column. In some examples, a fractionation column is described that includes a fractionation tray formed of multiple tray decks that move relative to each other. The tray decks can have apertures that move relative to each other between a position in which there is a comparatively large amount of open area through the fractionation tray to a position in which there is a comparatively small amount of open area through the fractionation tray. Movement of the trays can control turndown and/or clear fouling buildup on the tray surface.

The present invention relates to a column (1) for thermal treatment of fluid mixtures, having a cylindrical, vertical column body (2) which forms a column cavity (3), a plurality of trays (8) mounted in the column cavity (3) and spaced apart vertically from one another, at least one stub (11) disposed within the column body (2) and extending away from the column body (2), and a closable inspection orifice (9) formed in the stub (11). The characteristic feature of the column of the invention is that a spray device (20) disposed in the column body (2) can spray liquid (22) at least against the surface (15) of the stub (11) directed into the column cavity (3).

The present invention relates to a column (1) for thermal treatment of fluid mixtures, having a cylindrical, vertical column body (2) which forms a column cavity (3) and a vertical inner surface (16), a plurality of trays (8) mounted in the column cavity (3) and spaced apart vertically from one another, at least one stub (11) disposed within the column body (2) and extending away from the column body (2), and a closable inspection orifice (9) formed in the stub (11). The characteristic feature of the column of the invention is that in the case of a vertical cross section of the column (1) the surface (15) of the lower line of intersection of the stub (11) directed into the column cavity (3) or a tangent to the surface (15) of the lower line of intersection of the stub (11) at least in sections forms an angle within a range from 210 to 267 with the vertical inner surface (16) of the column body (2) which extends downward from the stub (11).

A process for the preparation of an alkylene glycol from an alkene comprising steps of: a) supplying a gas composition to an alkylene oxide absorber through a gas inlet, the absorber comprising an absorption section and a sump, and allowing the gas composition to pass upwards; b) supplying a lean absorbent to the top of the absorption section and allowing the lean absorbent to pass downwards; c) intimately contacting the gas composition with lean absorbent in the absorption section in the presence of one or more catalysts that promote carboxylation and hydrolysis; and d) withdrawing fat absorbent from the absorption section and passing the fat absorbent and any liquid condensate through the sump, wherein the sump comprises one or more baffles that define a flow pathway from a sump inlet to a sump outlet between the one or more baffles.

The present invention relates to a mass transfer tray comprising a bottom plate, at least one gas transmission part and a liquid transmission part, wherein the mass transfer tray has at least one valve located in the liquid transmission part, relates to use of a mass transfer tray of the present invention in liquid separation process, relates to a column comprising the trays of the present invention, and relates to a thermal separation process, comprising performing thermal separation within the column of the present invention.

Provided are a separation tower and method for treating condensed water. In order to overcome the defects that an apparatus has high investment and energy consumption and requires high safety due to the need to use an organic phase as an extractant, the present disclosure provides a separation tower for treating condensed water. The water separation tower includes a tower body. Evaporation units for purifying the condensed water are disposed in the tower body. A final-effect condensation unit is disposed below the evaporation units and connected with a vacuum pump. The present disclosure has the following beneficial effects: 1) the gravity is used, thereby omitting an intermediate pump and saving the power cost and a matching control system; 2) a pressure difference between every two effect evaporation units is designed, and heat energy provided by a first-effect evaporation unit is continuously evaporated to achieve separation, so that subsequent effect evaporation units do not require external heat sources; and 3) the degree of integration is high, the sealing property is good, a vacuum is easy to realize, a subsequent vacuum system is small, the energy consumption is low, a device is small in occupied area, the construction and installation cost is low, and the operation is simple.

Water having ammonia therein even in the presence of non-volatile weak acid may be reduced to from a concentration of at least about 0.1% by weight to less than 300 ppm by introducing the water contaminated with ammonia and ammonium into a fractionation column having a top and bottom, and heating the contaminated water at least in part by steam introduced below the contaminated water in the fractionation column at a pressure within the fractionation column being from 5 psi to 100 psi such that the contaminated water is heated to a temperature sufficient to liberate ammonia to realize a bottom product having an ammonia and ammonium concentration of less than about 300 parts per million by weight and a top gas comprised of ammonia and steam substantially in the absence of the weak acid. The process desirably is performed in the substantial absence of a strong acid.

A separation system may include a distillation column with a separation wall, a reboiler, and a condenser. The separation system may improves separation efficiency by changing a structure of a bottom area of a distillation column in an oligomerization process to improve a circulation system.

A separation device including a cylindrical column; a plurality of dual flow trays provided inside the cylindrical column to partition a plurality of stages; and a feed supply unit provided in one of the plurality of stages to supply a raw material including a liquid reactive monomer, in which a structure of the feed supply unit is designed so that feed can be uniformly distributed inside the column, thereby improving column efficiency. The feed supply unit can include a circular feed transfer pipe spaced apart between a lower and an upper dual flow tray of the stage in which the feed supply unit is provided, a plurality of inner pipes extending in a direction of a central axis from the feed transfer pipe, and a plurality of spray nozzles, where each of the plurality of inner pipes is individually provided with a plurality of the spray nozzles.