What is bubble cap distillation column?

What is bubble cap distillation column?

Distillation Column Internals. Bubble cap trays. A bubble cap tray has riser or chimney fitted over each hole, and a cap that covers the riser. The cap is mounted so that there is a space between riser and cap to allow the passage of vapour.

What is bubble cap in chemical engineering?

[′bəb·əl ‚kap] (chemical engineering) A metal cap covering a hole in the plate within a distillation tower; designed to permit vapors to rise from below the plate, pass through the cap, and make contact with liquid on the plate.

What is bubble cap tray?

Bubble cap tray is a flat perforated plate with risers (like pipes) around the perforations, and caps in the form of inverted cups over the risers. The caps are usually equipped with slots or holes through which vapor comes out.

What is baffle tray?

Baffle trays are unperforated trays with large “downcomer” areas for use in low-efficiency and highly fouling services which require a lower degree of vapor/liquid contact when compred to other conventional trays.

How many bubble caps are there per tray?

8) consisting of a high pressure (HP) and a low pressure (LP) column, with 28 and 20 bubble-cap trays, respectively.

What is weeping in distillation column?

What is Weeping of Distillation Column? If a very small fraction of the liquid flows from a tray to the lower one through perforation or openings of the tray deck, the phenomenon is called ‘weeping’.

What is normal tray spacing in distillation column?

0.15 m to 1 m.
The typical spacing of trays usually ranges from 0.15 m to 1 m. This value is contingent on the operating conditions as well as the distillation column diameter. The smaller the diameter, the closer the spacing. Closer spacing is also used when the headroom of the distillation column needs to be compact.

What is the difference between packed column and tray column?

Plate Column or Tray Tower Plate column is used for relatively large diameter & a large number of stages. A packed column is suitable for low-capacity operation. Plate column can handle a wider range of gas and liquid flow rates.

What is column distillation?

A distillation column is a tube that provides surfaces on which condensations and vaporizations can occur before the gas enters the condenser in order to concentrate the more volatile liquid in the first fractions and the less volatile components in the later fractions.

How does a distillation column work?

The distillation column is made up of a series of stacked plates. A liquid feed containing the mixture of two or more liquids enters the column at one or more points. The liquid flows over the plates, and vapor bubbles up through the liquid via holes in the plates.