Conical Cyclone Separator for Industrial Boilers and CFB Coal-fired
Cyclone separator is a kind of equipment used for separating
gas-solid system or liquid-solid system. The working principle is
that the solid particles or droplets with large inertia centrifugal
force are separated from the outer wall by the rotating motion
caused by the tangential introduction of air flow. The main
characteristics of cyclone separator are simple structure, high
operating flexibility, high efficiency, convenient management and
maintenance, low cost. It is used for collecting dust with diameter
of 5-10 μm. It is widely used in pharmaceutical industry. It is
especially suitable for dust particles which are thicker and
contain more dust. Under high temperature and high pressure
conditions, it is also often used as an internal separation device
in fluidized bed reactor or as a pre-separator. It is a widely used
separation equipment in industry.
Principle and Working
Cyclone separator is a dry gas-solid separator which separates dust
from airflow by centrifugal force produced by gas-solid mixture in
high-speed rotation. Because the centrifugal force acting on the
particles is far greater than the gravity and inertia force, the
separation efficiency is higher.
The separation principle and structure of the commonly used
tangential inlet cyclone separator are shown in the figure. The
main structure is a conical cylinder with a gas inlet pipe in the
tangential direction of the upper section of the cylinder, a
exhaust pipe inserted into a certain depth in the cylinder on the
top of the cylinder, and a powder outlet receiving fine powder at
the bottom of the conical cylinder. When the dust-laden airflow
enters the cyclone separator at the speed of 12-30m/s from the
intake pipe, the airflow will change from linear motion to circular
motion. Most of the rotating airflow flows downward from the
cylinder to the cone along the wall. In addition, under the action
of centrifugal force, the particles are thrown to the wall of the
separator. Once the dust particles contact the wall, they lose
inertia force. The momentum of downward axial velocity near the
wall falls along the wall and enters the ash discharge pipe, and
falls into the collection bag from the outlet. In the process of
downward rotation, the outer swirling flow continuously flows into
the central part of the separator, forming a centripetal radial
flow, which constitutes the inner swirling flow of upward rotation.
The rotation direction of inner and outer swirling flow is the
same. Finally, the purified gas passes through the exhaust pipe and
is discharged, and a part of the finer dust particles that have not
been separated also escape. The other small part of the gas flowing
from the intake pipe flows downward along the outer side of the
exhaust pipe through the top cover of the cyclone separator. When
it reaches the lower end of the exhaust pipe, it converges with the
upward internal swirling flow and enters the exhaust pipe. The fine
particles dispersed in the upper swirling flow in this part are
also takes away, and then trapped by a bag filter or a wet dust
Cyclone separators operate by incorporating centrifugal,
gravitational, and inertial forces to remove fine particles
suspended in air or gas. These types of separators use cyclonic
action to separate particulates from a gas stream. Typically, PM
enters the cyclone separator at an angle (perpendicular to the flow
stream, tangentially, or from the side), and is then spun rapidly.
A centrifugal force is created by the circular airflow that throws
the particulate towards the wall of the cyclone. Once the PM hits
the wall, it falls into a hopper below. “Clean” exhaust is then
either blown through or recirculated to be filtered again.
|Model||Air volume(m3/h)||Total height mm)|
1. Low capital cost.
2. Ability to operate at high temperatures.
3. Can handle liquid mists or dry materials.
4. Low maintenance requirements (no moving parts).
5. Small footprint - requires relatively small space.
1. Fabrication area of 200,000 square meters
2. 150 Engineers
3. 600 Coded welders
4. 60 Licensed Inspectors(NDT Level-III instructors)
5. Class-A Licenses for Design and Manufacture Boiler
6. ISO 9001:2008 Quality System
7. ASME Certificate of Power Boilers
8. ASME 'S','U' and NB stamp authorization