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Category: Trays and Packing

Trays and Packing

Stripping Service

Posted on September 17, 2009

For stripping service, as in a glycol or amine contactor , bubble cap trays are the most common. In recent years, there has been a…

Trays and Packing

Distillation Service

Posted on September 17, 2009

For distillation services, as in condensate stabilization, tray design is well understood, and many engineers are more comfortable with trays than with packing. In the…

Trays and Packing

Structured Packing

Posted on September 17, 2009

A bed of structured packing consists of a bed support upon which elements of structured packing are placed. Beds of structured packing typically have lower…

Trays and Packing

Random Packing

Posted on September 17, 2009

A bed of random packing typically consists of a bed support (typically a gas injection support plate) upon which pieces of packing material are randomly…

Trays and Packing

Tray Efficiency and Tower Height

Posted on September 17, 2009

In condensate stabilizers, trays generally have 70% equilibrium stage efficiency. That is, 1.4 actual trays are required to provide one theoretical stage. The spacing between…

Trays and Packing

Bubble Cap Trays vs. Valve Trays

Posted on September 17, 2009

At low vapor rates, valve trays will weep. Bubble cap trays cannot weep (unless they are damaged). For this reason, it is generally assumed that…

Trays and Packing

High Capacity/High Efficiency Trays

Posted on September 17, 2009

High capacity/high efficiency trays have valves or sieve holes or both. They typically achieve higher efficiencies and capacities by taking advantage of the active area…

Trays and Packing

Bubble Cap Trays

Posted on September 17, 2009

In bubble cap trays, vapor flowing up through the tower contacts the liquid by passing through bubble caps (Figure 6-7a). Each bubble cap assembly consists…

Trays and Packing

Valve Trays

Posted on September 17, 2009

Valve trays are essentially modified sieve trays. Like sieve trays, holes are punched in the tray floor. However, these holes are much larger than those…

Trays and Packing

Trays

Posted on September 17, 2009

For most trays, liquid flows across an “active area” of the tray and then into a “downcomer” to the next tray below, etc. Inlet and/or…

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