One of the most popular methods of moving
solids in the chemical industry is pneumatic conveying.
Pneumatic conveying refers to the
moving of solids suspended in or forced by a gas stream
through horizontal and/or vertical pipes. Pneumatic conveying
can be used for particles ranging from fine powders to pellets
and bulk densities of 16 to 3200 kg/m3 .
Gases have been used successfully in industry to transport
a wide range of particulate solids - from wheat flour to
wheat grain and plastic chips to coal.Even though pneumatic
conveying systems have been designed and operated for many
years, their successful operation is still more often based
on experience rather than science. The lack of practical
information on pneumatic conveyors leaves most users dependent
on vendors for the design, selection, and installation of
pneumatic conveying equipment
The specifying engineer typically has four choice in specifying
a pneumatic conveying system.
1. Dilute phase vacuum operation
2. Dilute phase pressure operation
3. Dilute phase pressure-vacuum operation
4. Dense phase pressure operation