摘要:
The distribution of a liquid supplied to an exchange column is improved by use of a distributor (10, 70) that includes a plate having at least one elongate channel (42), which has a "first" longitudinal axis, a bottom (50), and at least one aperture (44) in the bottom, and at least one internal baffle (40, 54), which has a "second" longitudinal axis substantially parallel to the first longitudinal axis and is at least partially disposed in the channel (42). The distributor can comprise a control baffle (64, 68), which is at least partially disposed in another channel (17') having a "third" longitudinal axis at an angle with the first longitudinal axis and in fluid communication with the channel (42) having the first longitudinal axis.
摘要:
An assembly of trays (10, 20) in a divided wall column having an inner column wall (11), a dividing wall (14), and an interior space comprising a first tray (10) comprising at least one radial downcomer (12, 32, 52) adjacent the dividing wall (14) and extending radially toward the inner column wall (11) a first substantial distance, and a first liquid receiving area having a radial axis at a first angle to the dividing wall (14) and extending radially toward the inner column wall (11) a second substantial distance; and a second tray (20) below the first tray (10), the second tray (20) comprising at least one other downcomer (26, 46, 66) having a radial axis at a second angle to the dividing wall (14) and extending radially toward the inner column wall (11) a third substantial distance, and at least one second liquid receiving area adjacent the dividing wall (14) and extending radially toward the inner column wall (11) a fourth substantial distance.
摘要:
A divided wall exchange column (20) includes a dividing wall (26) strengthened by stiffening members (26) and/or a double wall design to better withstand pressure differentials and minimize temperature differentials. When a double wall is used, cost of manufacture and installation is minimized by reducing the manufacturing tolerances required while providing a design robust in construction, installation, and operation. When structured packing is used, the stiffening members, combined with positioning the layers of packing at preferred angles relative to the dividing wall, result in minimal interference with the heat and/or mass transfer process while minimizing the complexity of manufacture and construction of the packing. Further, by positioning the top layer of structured packing at other preferred angles relative to the dividing wall, a simplified liquid distributor design may be used in the divided wall exchange column while the layers below may still be orientated as described above with all the associated benefits.
摘要:
A nitrogen generating air separation system is disclosed having dual air feeds to dual, low and high pressure, distillation columns wherein a reboiler-condenser is mounted overhead of the high pressure column and a vaporizer-condenser is mounted overhead of the low pressure column and preferably a portion of the high pressure air feed is expanded and desuperheated before being introduced into the low pressure column.
摘要:
Liquid descending in an exchange column (14) containing a layer of packing (12) is collected and redistributed by an apparatus (10) located below said layer and comprising a plurality of laterally spaced longitudinal members (16); a plate (18) vertically spaced from the bottom of the layer of packing and extending between an adjacent pair of the longitudinal members to collect descending liquid passing therebetween; and at least one vapor riser (20) projecting upwardly from the plate between said members to receive and transmit vapor ascending in the exchange column, each vapor riser having an upright wall (30) closed by a cap (24) and having at least one vapor opening (22).