Powder pneumatic conveying equipment
Powder pneumatic conveying equipment
- Pneumatic powder conveying equipment is a type of equipment that uses airflow to convey powdery materials. It has the advantages of high efficiency, cleanliness, and flexibility.
Basic principles
- Air conveying: Using air flow generated by compressed air or vacuum as a power source. The material moves in the pipeline in a suspended or plugged state.
Classification:
- According to the installation method, it is divided into positive pressure conveying system and negative pressure conveying system.
- According to the conveying distance, it is divided into long-distance conveying and short-distance conveying.
- According to the air source, it can be divided into compressed air transportation and vacuum transportation.
Main types
- Pneumatic conveying system of warehouse pump: compact structure, suitable for medium and short distance conveying. It has high conveying efficiency and reliability.
- Spiral pneumatic conveyor: uses the thrust generated by the rotation of the spiral blades to transport materials. Suitable for occasions with small horizontal or tilt angles.
- Venturi pneumatic conveying device: uses the Venturi effect to generate high-speed airflow to suck in materials. The equipment is simple and the energy consumption is low.
- Roots blower pneumatic conveying system: Use Roots blower to provide stable air flow pressure. Suitable for large flow and long distance transportation tasks.
- Vacuum suction system: Create a negative pressure environment at the receiving end to attract materials into the pipeline. Often used in situations that are prone to clogging or have hygiene requirements.
Application areas
- Chemical industry: carbon black, pigments, dyes, etc.
- Building materials: cement, gypsum, limestone powder, etc.
- Food processing: milk powder, coffee powder, granular food, etc.
- Metallurgical minerals: ore powder, coal powder, etc.
- Pharmaceutical industry: packaging and transportation of pharmaceutical raw materials and finished products.
advantage
- Efficient and energy-saving: more energy-saving than traditional mechanical conveying methods.
- Clean and environmentally friendly: The closed pipeline design prevents dust leakage from polluting the environment.
- High degree of automation: easy to implement remote monitoring and automated operations.
- Good flexibility: the transportation route and destination can be changed according to needs.
- Easy maintenance: simple structure and easy replacement of parts.
Things to note
- The characteristics of materials and working conditions must be fully considered during design.
- Regular inspection and maintenance to ensure long-term stable operation.
- Comply with relevant safety regulations and operating procedures.
Principle of powder pneumatic conveying equipment
- The principle of powder pneumatic conveying equipment is to use the energy of air flow to transport powder materials in the direction of air flow in a closed pipeline. This equipment usually consists of a material receiver, a conveyor pipe, an air duct, a separator, an air lock and a fan. The function of the material receiver is to enter the material, resulting in a suitable material-to-air ratio, so that the material can start and accelerate; the function of the separator is to separate the material from the air, and to sort the material; the air lock is used to uniformly supply or unload materials , while preventing air from leaking in; the fan provides power to the system.
- The application scenarios of powder pneumatic conveying equipment are very wide, including cement plants, alumina plants, thermal power plants, etc. It is suitable for transporting cement raw meal powder, alumina powder, fly ash and other powder particles. This equipment has the characteristics of simple structure, convenient operation, and can be transported over long distances. During the transportation process, it can simultaneously perform physical operations such as heating, cooling, and drying of materials.
The role of powder pneumatic conveying equipment
- Powder pneumatic conveying equipment is mainly used to transport powdery or granular materials. It has the following main functions:
- Good dust-proof effect: During the transportation process, powder pneumatic conveying equipment can effectively prevent dust from flying and reduce environmental pollution.
- Facilitates mechanization and automation: This equipment can reduce labor intensity, save manpower, and facilitate mechanization and automation operations.
- Multiple process operations: During the transportation process, multiple process operations such as mixing, crushing, sorting, drying, and cooling can be performed simultaneously.
Application scenarios of powder pneumatic conveying equipment
- Powder pneumatic conveying equipment is widely used in the following industries and scenarios:
- Casting, Chemical industry, Pharmaceutical, Grain industry: Suitable for conveying particles and powder materials that are not easily broken.
- Textile, food, electronics, plastics, medicine, packaging and other industries: used for pneumatic pipeline transportation of lightweight materials.
- Lithium-ion battery industry: used in the production and processing of positive and negative electrode materials, with the characteristics of high automation and clean production.
What is the maximum height that powder pneumatic conveying equipment can convey?
- In practical applications, the height of negative pressure pneumatic conveying depends on many factors, including material properties, conveying distance, diameter of conveying pipes, air flow speed, etc. For lighter materials, such as cement, lime, etc., the conveying height of negative pressure pneumatic conveying can reach 50 meters or even higher. But for heavier materials, such as calcium powder, boiler ash, etc., due to their high density, the conveying height is usually about 10-15 meters.
- It should be noted that the higher the conveying height, the higher the requirements for conveying air flow. The conveying resistance increases, and the flow and pressure of compressed air need to be increased. This will not only increase energy consumption, but also increase equipment costs. Therefore, in practical applications, factors such as material properties, conveying distance, and pipe diameter need to be comprehensively considered to determine the appropriate conveying height and conveying method to achieve energy-saving conveying.