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In the field of solid waste disposal, sorting equipment also occupies a relatively important position. How to effectively sort out impurities in materials, as well as the sorting effect and applicability of sorting equipment, will adopt a modular layout design according to the situation of the materials.


Wind separator, also known as drum density separator, is composed of a centrifugal fan, a separation unit of a rotating drum, a belt conveyor, and a sedimentation chamber. It uses the principle of different weights and wind resistances of materials to drive materials with the same wind force to achieve the purpose of easy and automatic classification of materials. It is mostly used in the production lines of domestic garbage, stale garbage, and industrial garbage disposal.

air separators

air separators

According to the principle of aerodynamics, the wind separator uses controllable airflow as the sorting medium. Under the action of airflow, the material is sorted according to density and particle size. The airflow can take lighter materials (such as paper, plastic bags, films, etc.) upward or horizontally to a farther place, while heavy materials fall because the rising airflow cannot support them, or are thrown to a closer distance in the horizontal direction due to inertia. Therefore, the wind sorting process is based on the sedimentation law of materials in the air, so as to achieve the purpose of classification.


In the field of solid waste disposal, sorting equipment occupies a very important position in many production lines. The sorting effect and applicability of sorting equipment have always been a focus of attention. Especially for the more common wind sorting equipment, many people are not very clear about its functions and scope of application, including how it plays a role in actual operation. Below I will give a detailed introduction to the wind sorting equipment so that everyone can have a clear understanding.

air separators

air separators

A. Working principle of wind sorting machine

According to the principle of aerodynamics, with controllable airflow as the sorting medium, the material is sorted according to density and particle size under the action of airflow. The airflow can take away lighter materials (such as paper, plastic bags, films, etc.) upward or horizontally to a farther place, while heavy materials fall because the rising airflow cannot support them, or are thrown to a closer distance in the horizontal direction due to inertia. The wind sorting process is based on the sedimentation law of materials in the air, so as to achieve the purpose of classification.

air separators

air separators

B. Application scope of air separator

1.Air separator is a kind of mechanical equipment widely used in many fields, and its application scope mainly includes the following aspects:Waste treatment industry: Air separator also plays an important role in the waste treatment industry. It can separate light materials (such as plastics and foams) from heavy materials, and is suitable for the treatment of construction and decoration waste and stale domestic waste. Through the treatment of air separator, garbage can be effectively classified into different categories such as recyclables, hazardous waste, kitchen waste and other garbage, which not only improves the accuracy of garbage classification, reduces the impact of landfill or incineration on the environment, but also provides high-quality raw materials for recycling companies.


2. Food processing industry: In the food processing industry, air separators are often used for the sorting and cleaning of materials such as rice, wheat, and beans. Through the principle of aerodynamics, air separators can separate impurities, light materials, etc. from materials to ensure the purity and quality of food. This is crucial for food processing companies because pure raw materials are the basis for producing high-quality food.

3. Chemical industry: In the chemical industry, air separators are often used for the grading and sorting of powdered materials. The production of chemical products often requires fine grading and processing of raw materials to meet different production needs. By adjusting parameters such as air flow speed and direction, the air separator can achieve accurate grading and sorting of powdered materials, providing strong support for the production of chemical products.

4. Metallurgical industry: In the metallurgical industry, air separators are widely used for sorting and classification of materials such as ore, coal, and limestone. In the metallurgical production process, raw materials need to be strictly screened and classified to ensure the smooth progress of the production process and the quality of the final product. The air separator uses the principle of aerodynamics to efficiently separate different components in the material to meet the needs of metallurgical production.

5. Other industries: In addition to the above industries, air separators are also applicable to many other fields. For example, in the pharmaceutical industry, air separators can be used for grading and screening of drugs; in the building materials industry, air separators can be used for grading and processing of materials such as stone and cement; in the ore industry, air separators can be used for the selection and purification of ores, etc.

Air separators have a wide range of applications and play an important role in many industries. With the continuous advancement of technology and the deepening of application, the application scope of air separators will be further expanded and deepened.

air separators

air separators

C. Advantages of air separators

1. The main machine is controlled by a frequency converter, and the wind speed can be adjusted flexibly.

2. The separation purity is high, which is easy to be further processed in the following process.

3. Modular design is adopted, which is convenient for maintenance.

4. Few wearing parts and long service life.

5. It can meet the needs of materials with different properties and has a wide range of applications.


PS: Among the sorting equipment, air separators are mostly used for the sorting of light and heavy materials on the production line. In addition to relying on mechanical equipment, some production lines also need to rely on manual cooperation to make the material purer. Zhongcheng Machinery has high-quality professional capabilities in the design and formulation of solid waste production lines. You are welcome to call for consultation.


Author : Serena Chang

Serena Chang is the writer of blog and news column. With more than 10 years of working experience in the machinery industry, she has a comprehensive understanding of environmental protection machinery and is willing to share useful knowledge of environmental protection machinery.

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