With the rapid development of science and technology, the demand for powder in industrial manufacturing is increasing, as one of the powder conveying methods, pneumatic conveying, is to use gas as a carrier to realize the fluidization of powder, so as to make it have the liquid-like flow properties, so as to improve the effectiveness of powder transportation. This method is characterized by high efficiency and stability, environmental friendliness, flexible layout, etc. It is widely used in petroleum, chemical, food, pharmaceutical, new energy and other industries.
Pneumatic conveying is categorized according to two states [1][2][3][4], which are the state of pressure in the pipeline and the state of particle flow:

1. Classified according to the pressure state
   Negative pressure pneumatic conveying (Vacuum Conveying) adopts the vacuum pump and so on as the power source, pumps the material at the end of the pipeline, so that negative pressure is formed in the pipeline, so that the material is sucked into the conveying system with the airflow.
   ➷ For short distance, small capacity conveying;
   ➷ For multi-point to single-point centralized conveying;
   ➷ Negative pressure in the pipe without dust leakage;
   ➷ Can be a certain degree of drying and cooling of materials. Positive pressure pneumatic conveying (Pressure conveying) the use of air compressors or Roots blowers in the starting point of conveying gas, providing positive pressure to promote the material along the pipeline conveying.
   ➷ For single-point to multi-point dispersed conveying;
   ➷ For long-distance, large-capacity conveying;
   ➷ System sealing requirements are high, to prevent dust leakage;
   ➷ Can be a combination of dilute-phase or dense-phase conveying methods.

2. According to the flow state classification
   Dilute Phase Pneumatic Conveying (Dilute Phase Pneumatic Conveying) using high-speed gas in the pipeline (about 20~40m/s) will be dispersed with each other, powder and granular materials suspended in the gas flow for conveying, the solid gas ratio is low.
   ➷ Fast conveying speed and long distance;
   ➷ Higher energy consumption and high wear and tear on materials;
   ➷ Suitable for light and non-abrasive materials;
   ➷ Can be used with positive or negative pressure system.
   Dense Phase Pneumatic Conveying (Dense Phase Pneumatic Conveying) using high-pressure gas pressure to send materials, conveying speed less than 10 m/s, gas source pressure up to 0.7MPa, so that the material particles to form a group flow or embolism flow, relying on the static pressure of the gas to promote the powder to move forward, the solid-gas ratio is high.
   ➷ Able to realize longer distance and larger quantity conveying;
   ➷ Lower energy consumption, less wear and tear on the material;
   ➷ Suitable for fragile, high-density materials;
   ➷ Relatively complex structure of the equipment.

Pneumatic conveying solutions from Nanjing Shinkai
The pneumatic conveying equipment developed by Nanjing Shinkai is designed to solve the problem of stable transportation of powders, which includes key equipments such as inflatable cones, inflatable flute tubes, pipeline inflators and so on.
These equipment products adopt porous metal film as the key material for gas homogenization and distribution in large quantities, which has the following significant advantages: ✔ High permeability for stable and uniform gas flow distribution;
✔ Controllable porosity/mesh density;
✔ Excellent mechanical strength and pressure resistance;
✔ Resistance to impact and alternating loads;
✔ Resistance to high temperatures up to 900℃;
✔ Higher corrosion resistance;
✔ Improvement of powder conveying efficiency and stability;
✔ Reduce clogging and bridging phenomenon, prolong the service life of equipment

Pneumatic conveying plants developed by SHINKAI have been used by many coal chemical companies worldwide in HT-L, SHELL or GSP pulverized coal pressurized gasification plants. At the same time, the silicon industry and catalyst producers also favor the advantages of SHINKAI’s pneumatic conveying equipment in conveying ultra-fine powders. If you are in need of such equipment to assist in ultra-fine powder conveying, please contact us to discuss your needs and we will customize and develop a total process solution for you, including fluidizing element design and selection, process design, valve and instrument selection, piping design and more.