When formulating technical solutions, technicians often design the process according to customer needs, especially some transportation difficulties, and need to comprehensively evaluate the working conditions to determine the final solution.
The pneumatic conveying system uses air flow as the conveying medium to promote the bulk material to be transported from one end to the other through fluidization technology. However, the process involves multiple variables, and the process parameters in powder conveying need to be continuously adjusted to support the engineering experiments. Next, we will give a brief introduction to the common design pain points:
1. Pipeline design
First of all, considering the density of the material in the pipeline, dilute phase conveying requires a larger pipe diameter size to avoid material breakage or pipeline blockage. Secondly, according to the characteristics of the material (easy moisture absorption, easy breakage, strong corrosiveness, etc.), it is necessary to pay attention to the material of the pipeline and the contact surface protection between the material and the pipeline. Finally, as the material flows through the elbow, it will generate an impact force at the inflection point, which will lead to a decrease in conveying capacity to a certain extent. To this end, we should use elbows reasonably in the process design, shorten the conveying distance through flexible pipe direction layout, and avoid blocking the pipeline due to too slow fluid flow rate.
2. Pressure: During the flow of the material-gas mixture, the pressure difference will also change with the change of flow rate, which has an important impact on the stability of the whole system. To do this, we need to accurately calculate the pressure drop of the pipeline by combining multiple factors such as pipeline direction, pipeline friction, and conveying speed.
3. Airflow velocity:
In dilute phase systems, when the system is first started, the air flow needs to entrap the material in a stationary state and smoothly roll it into the air stream. To this end, the airflow velocity needs to be calculated in combination with the particle size and density, flow resistance, etc., to ensure that the material particles are suspended in the pipeline.
4. Conveying capacity:
Denser materials often require larger conveying air volume and pressure as the driving force, and reasonable pipe layout can effectively reduce pressure loss. In addition, when selecting and designing, the fan also needs to match the corresponding parameter values (air volume, pressure, power) to adjust the speed of the fan and improve the conveying efficiency.
5. Exhaust system:
Improper exhaust of the rotary airlock feeder will lead to the failure of the material to be discharged smoothly, which will make the feeding speed slow or uneven feeding, and even cause the accumulation of materials, affecting the conveying efficiency. To this end, we need to rationally design the exhaust system and standardize the operation process.
In addition, system control, ambient humidity temperature, etc. are also design difficulties in powder transportation, which also play a crucial role in the stable operation of the whole system.
Thanks for reading, the above is an introduction to some of the contents of pneumatic conveying systems, if you want to know more about itPneumatic conveying systemFor more information, please call us for more information, and we will serve you wholeheartedly.