2 replies to this topic

[Teck Guan Wan]

How do we know what is the required height for the internals design?
Like how far it is from the manhole?
how big is the manhole?
liquid distributor?

please help

[Art Montemayor]

Teck:

This where the real engineering comes into play: you use your common horse sense and ingenuity.

For example, imagine that YOU are going to enter the tower or vessel yourself. What would you want for a manhole size? You will find that general consensus accepts 2 feet (24 inches) as an acceptable size of manhole to accept you, with an air pack, tools, and equipment to safely enter and exit in an efficient manner. You also select a standard size manhole dimension. You want to give personnel a safe way to enter and exit when they are doing inspection and maintenance. You also are required to consider the size of the largest internal object you have to put through the manhole. This is all common sense.

A liquid distributor should be located where you ensure that the distribution of liquid will be as you have designed the system. In other words, you don’t want to have liquid being sprayed or distributed such that it bounces off of the internals and is entrained upwards and out of the tower or vessel. Therefore, you want to keep a nominal, appropriate distance between the distributor and the internals the liquid hits as it is distributed. This distance will depend on the flow rate, the diameter of the vessel, the density, the type of distributor, and how you have designed the distribution. I usually allow for at least 1 to 2 feet between the top of the first internal and the distributor.

[Teck Guan Wan]

Thanks

Thanks Art!

Do you mind explaining what is drip point density?
or any reccomendation on the internal sizing of packed column?