Industrial Cyclone Separator for Chemical Processing

A cyclone separator is a dry separation device that uses centrifugal force to separate solids from gas or liquids. Its core principle is to make a dust-laden gas stream spin at high speed, causing particles to move outward under centrifugal force and strike the separator wall.

The operation of a cyclone separator can be summarized in several steps:

• Tangential inlet and rotation: Dust-laden gas enters the separator tangentially through the inlet pipe at a relatively high velocity, typically 12–30 m/s. The gas changes from linear motion to circular motion.
• Outer vortex and particle separation: Most of the rotating gas spirals downward along the wall, forming the outer vortex. During rotation, particles—which are much denser than the gas—are driven toward the wall by centrifugal force. After contacting the wall, they lose momentum and fall into the hopper at the bottom under gravity and the downward axial flow.
• Inner vortex and clean-gas discharge: As the descending outer vortex moves through the cone, it contracts toward the center and forms an inner vortex that flows upward. The cleaned gas then exits through the outlet pipe at the top. The inner and outer vortices rotate in the same direction.

Cyclone separators have a simple structure, no moving parts, easy maintenance, and relatively low cost. They are suitable for collecting particles typically 5–10 µm and larger, especially in applications with high dust concentrations or high-temperature and high-pressure operating conditions. They are often used as pre-separators.

Cyclone separators are available in many designs, with different structural features for different applications. The following are examples of common series and their typical specifications.

This is a centrifugal cyclone dust collector with a dust isolation chamber and a downward-sloping, spiral tangential gas inlet. Based on the cylinder diameter, it is available in 11 sizes from Ø300 to Ø800 mm, with single- and double-cylinder configurations.

For example, the D/A-3.0 has an approximate air-handling capacity of 670–1,000 m³/h, while the D/A-7.0 handles approximately 5,440 m³/h.

This design has a bypass separation chamber outside the cylinder to address the “top dust ring” problem. It offers relatively high efficiency for particles larger than 5 µm.

It is available in two types: XLP/A, with a double cone and semi-spiral design, and XLP/B, with a single cone and full-spiral design. The XLP/B has a longer cone, providing higher efficiency but also greater pressure drop.

Typical models include the XLP/A-3.0, with an approximate air-handling capacity of 750–1,060 m³/h. The XLP/A-8.2 is available for higher airflow requirements.

The CLG series is designed to eliminate the “top dust ring” beneath the top plate. Its design is similar to the Ducon type used in the United States. The spiral top typically has an inclination angle of 10°, and the inlet area ratio is 7.76.

Typical operating gas velocity is 16 m/s, with a pressure drop of approximately 294–491 Pa and dust-collection efficiency of 85–90%.

The XFCC series is available in single-, double-, and four-cylinder configurations, with more than 30 specifications. It handles airflow rates from 670 to 283,600 m³/h.

Model numbers indicate the cylinder diameter and number of cylinders. For example, an XFCC300 is a single-cylinder unit with a diameter of 300 mm and an airflow capacity of 670 m³/h at an inlet velocity of 12 m/s. An XFCC2500X4 is a four-cylinder unit with a capacity of up to 141,800 m³/h at 18 m/s.

• ABXF Series: A newer high-efficiency cyclone separator series. For example, the ABXF150 has an inlet velocity of 16–20 m/s, while the ABXF200 has an approximate airflow capacity of 370–735 m³/h.
• Torit® Cyclone Dust Collectors: Commercial models with airflow capacities ranging from 510 to 22,082 m³/h. Model numbers such as “12,” “20-5,” and “44-50” correspond to different airflow ranges.

Depending on the air-entry configuration, cyclone separators may also be classified as external-vortex, internal-vortex, or downflow types. Their allowable airflow rates and pressure-loss characteristics vary. For example, with a cylinder inside diameter of 2,000 mm, an external-vortex type may handle 26,200–29,200 m³/h, while an internal-vortex type may handle 22,500–31,200 m³/h.