Product Description:
The heat recovery tower performs the following
functions:
It quenches the gas (if it is not already water
saturated)
It recovers heat from the inlet gas
It condenses out excess moisture
The gas discharges to the atmosphere at a much
lower temperature than before
As a result of the condensation of moisture
in the tower, additional particulate is “scrubbed”
from the gas
Types Available:
We use 4 different types of towers to recover heat.
Type 1: Tray Towers
These are the most thermally efficient and have the lowest capital
cost. Their shortcomings are:
high pressure drop (~ 3" WG per tray)
more susceptible to fouling with solids
Type 2: Grid-type Packed Towers
These are less efficient and more expensive than tray towers.
Their advantages over trays:
much lower pressure drop
much less susceptible to fouling
Type 3: Spray Towers
These are the least thermally efficient with a capital cost
intermediate between trays and grid towers.
Their advantages are:
low pressure drop
negligible likelihood of fouling
Type 4: Packed (Random type) Towers
Along with the tray tower, these are the most thermally efficient.
Depending on whether plastic or metal packing can be used, they
can also be the cheapest.
Features of this type:
low pressure drop
most susceptible to fouling with solids
Application:
Most product dryer exhausts have to pass through some type of
air pollution control equipment to remove solid particulate.
The residual particulate content governs the selection of the
type of heat recovery device.
Some examples are:
Pulp/Paper Machine dryer: spray
Food Product Drying: low particulate –
tray
: high particulate - Grid
Mineral Product Drying: grid tower
Boiler off gas, scrubbed: low particulate -
packed
Our Scope of Supply:
Heat recovery towers complete with all internals
and flanged nozzles
Installation and peripheral equipment is by
others
