A multi-stage centrifugal blower is an industrial equipment that uses a multi-stage impeller series structure to compress and transport gases through high-speed rotating impellers. The following will provide a comprehensive introduction from four aspects: working principle, structural composition, application scenarios, and advantageous features.

working principle

The multi-stage centrifugal blower operates based on the principle of converting kinetic energy into potential energy. After entering the impeller from the axial direction, the gas gains kinetic energy under the action of the high-speed rotating impeller blades and accelerates radially. When high-speed gas leaves the impeller and enters the diffuser, the flow direction changes, causing deceleration and converting kinetic energy into pressure energy.

In multi-stage design, the gas is compressed by the first stage impeller and guided into the next stage impeller through a reflux device to achieve step-by-step pressure increase. This series design enables multi-stage centrifugal blowers to generate higher pressure than single-stage blowers (wind pressure range of 15kPa to 0.2MPa, compression ratio of 1.15-3).

124d2323c69c174b9069f38d965685e2.jpg

structural composition

The multi-stage centrifugal blower is mainly composed of the following core components:

Rotor system: including multiple impellers, main shafts, spacers, and balance disks. Each stage of the impeller adopts a backward design, with an efficient flow channel structure at the outlet and an equal strength conical arc shape at the front plate to reduce intake resistance.

Chassis: Adopting a graded riveting and welding structure, with a horizontal sectional design for easy maintenance. Equipped with a reflux chamber, partition, and diffuser, some models have their inner walls coated with epoxy resin to enhance corrosion resistance.

Sealing system: Adopting a combination of labyrinth and carbon ring sealing to prevent gas leakage.

Transmission system: The motor is connected through a coupling and can be driven directly or by a belt.

Auxiliary system: including muffler (noise reduction below 85dB), cooling system, and lubrication system (lithium grease lubrication or pressure oil supply).

Application scenarios

Multi stage centrifugal blowers are widely used in industrial fields that require high-pressure gas transportation:

Environmental protection field: aeration system in sewage treatment plants (with wind pressure up to 100kPa), flue gas desulfurization and denitrification.

Metallurgical industry: blast furnace blower, coke oven gas transportation.

Chemical industry: alkali filtration and vacuum pumping, chemical raw material equipment, sulfuric acid equipment.

Other fields: mining flotation, paper vacuum systems, pharmaceutical and food industry processes.

Advantages and Features

Compared to single-stage centrifugal fans and other types of blowers, multi-stage centrifugal blowers have the following significant advantages:

High voltage output: Through multi-stage series design, a high voltage of 15kPa-0.2MPa can be generated to meet special process requirements.

Efficient and energy-saving: Birotz fans save 15-20% energy, and 10-15% energy compared to single-stage high-speed turbine fans.

Stable operation: Low speed design (usually several thousand revolutions per minute), high reliability, long service life.

Gas purity: oil-free design, clean and dry output gas, low pulsation.

Easy maintenance: The structure is relatively simple, the spare parts are standardized, and the operation and maintenance requirements are low.

Multi stage centrifugal blowers, with their unique multi-stage compression design, demonstrate outstanding performance in high-pressure gas transportation and are essential key equipment in many industrial processes. With the increasing demand for energy conservation and environmental protection, its efficient and stable characteristics will further expand its application scope.

Shandong Ruidian Environmental Protection Technology Co., Ltd. is located in the high-end equipment manufacturing base of Luozhuang District, Linyi City. It is a modern enterprise that focuses on the research and development, design, production, and manufacturing of multi-stage centrifugal blowers, centrifugal vacuum pumps, Roots blowers, pneumatic conveying systems, and soil remediation integrated specialized equipment,