Detailed explanation of positive and negative pressure dense phase pneumatic conveying technology


Release time:

2024-08-19

Detailed explanation of positive and negative pressure dense phase pneumatic conveying technology

Detailed explanation of positive and negative pressure dense phase pneumatic conveying technology

1. Overview

Positive and negative pressure dense phase pneumatic conveying technology is a method to realize material conveying through air pressure difference. The technology uses aerodynamics to transport materials from one location to another through pipes using air as the transport medium. The positive and negative pressure dense phase pneumatic conveying system is mainly composed of sending device, conveying pipeline, receiving device and control system.

Principle of 2. Technology

The positive and negative pressure dense phase pneumatic conveying technology is divided into two forms: positive pressure conveying and negative pressure conveying. Positive pressure conveying is by applying positive pressure to the conveying pipeline, so that the material in the pipeline to form a flow state for transportation. Negative pressure conveying is to form negative pressure by extracting the air in the pipeline, so that the material is sucked into the pipeline under the action of negative pressure and realize conveying. The dense phase state refers to the high concentration of the material in the pipeline, which has good fluidity, and avoids the blockage at high concentration and the dilution at low concentration.

3. technical characteristics

1. A wide range of application: suitable for all kinds of powder, granular and block material transport.
2. High conveying efficiency: it can realize continuous, uniform and stable conveying and reduce material waste.
3. Good flexibility: flexible adjustment of the delivery capacity to adapt to different production needs.
Energy saving and environmental protection: reduce dust pollution and energy consumption.
High degree of automation: remote control can be realized to reduce labor costs.

4. system composition

1. Sending device: used to mix materials with air and send them into the pipeline, including feeders, mixers, blowers, etc.
2. Conveying pipeline: used for material transportation, including straight pipe, elbow, tee and other components.
3. Receiving device: used to receive and separate materials and air, including separators, dust collectors, etc.
4. Control system: used to monitor and adjust the operation of the entire system, including PLC controllers, sensors, etc.

5. Application Areas

Positive and negative pressure dense phase pneumatic conveying technology is widely used in chemical, metallurgy, food processing, pharmaceutical and other industries. Specifically used in such as cement, fly ash, food, plastic particles and other materials transport.

6. Operation and Maintenance

1. Operation: Operators need to be professionally trained and familiar with the system operation process. Before starting, check whether the components are in good condition to ensure that the system is in normal condition. During the operation, it is necessary to pay close attention to the changes of various parameters and adjust them in time.
2. Maintenance: regular maintenance of the system, including cleaning pipes, inspection of worn parts, etc. Found the problem timely repair, to ensure the stable operation of the system.

7. considerations

1. Prevent blockage: ensure uniform particle size of materials and avoid large particle materials blocking pipes.
2. Prevent leakage: check the pipe connection regularly to ensure good sealing performance and avoid air leakage.
3. Prevent overload: avoid long-term overload operation to avoid damage to the system.
4. Safe operation: Operators must comply with safety regulations to ensure personal safety.

8. Summary

The positive and negative pressure dense phase pneumatic conveying technology is an efficient and flexible material conveying method, which is widely used in various fields. By understanding its principles, characteristics, system composition, operation and maintenance, we can better apply the technology, improve production efficiency and reduce operating costs.