pneumatic conveying design guide

Pneumatic conveying design guide

Pneumatic Conveying Equipment Design and Installation Guide
Preparation work before design:
Before designing pneumatic conveying equipment, the following preparatory work needs to be carried out:
1.Determine the nature and characteristics of the conveyed materials, including the particle size, density, humidity and other parameters of the materials, so as to select the appropriate conveying equipment and pipeline size.
2.Determine the conveying distance and height to determine the required air flow pressure and fan power.
3.Consider environmental factors, such as temperature, humidity, dust, etc., in order to select suitable materials and protective measures.

Equipment selection and sizing:

According to the nature and transportation requirements of the material, select appropriate pneumatic conveying equipment, including pneumatic conveying pipelines, fans, pneumatic conveying pumps, etc. At the same time, the required pipe size and fan power are determined based on the conveying distance and height. When selecting and sizing equipment, you also need to consider the reliability, maintainability and affordability of the equipment.

Piping layout and installation:

1.Design a reasonable pipeline layout according to the flow direction and transportation requirements of the transported materials. Keep straight sections of pipe as short as possible to avoid excessive bends and drag.
2.Determine the material and connection method of the pipeline. Commonly used materials include steel, stainless steel and plastic. Choose the appropriate connection method, such as welding, threaded connection or flange connection.
3.When installing pipelines, ensure that the pipelines are smooth and firm to avoid vibration and air leakage of the pipelines. At the same time, attention should be paid to the insulation and anti-corrosion measures of pipelines to extend the service life of the equipment.

Installation of fans and pneumatic transfer pumps:

1.When installing the fan, choose a suitable location to ensure that the air inlet and outlet of the fan are unobstructed. At the same time, pay attention to the fixation and balance of the fan to reduce vibration and noise.
2.When installing a pneumatic conveying pump, the appropriate pump type and installation method must be selected according to the nature of the material and the conveying requirements. At the same time, the sealing and reliability of the pump must be ensured to avoid leakage and blockage.

Safety measures and maintenance:

When using pneumatic conveying equipment, pay attention to the following safety measures and maintenance:
1.Check and clean pipes regularly to avoid accumulation of materials and blockage.
2.Regularly inspect and maintain fans and pneumatic delivery pumps to ensure their normal operation and safety.

Pneumatic conveyor working principle

‌‌The working principle of a pneumatic conveyor is to use the action of air flow to transport materials from one place to another. ‌It generates airflow by ‌compressing air or other gases to suspend materials in the airflow, thereby achieving fast and efficient transportation. Specifically, the working principle of a pneumatic conveyor is based on the principle of pneumatic conveying. First, air flow is generated by compressed air or other gases to form a certain air flow speed and pressure. Then, the material is sent into the conveying pipe through the feeding device (such as the feeding hopper). The material will be picked up by the air flow, suspended in the air flow, and transported along the pipe with the push of the air flow. Finally, the materials are discharged to the destination through the discharge port.
The structure of a pneumatic conveyor mainly includes a feeding device, a pipeline system, an air source device, a separation device, a control system, etc. The feeding device is responsible for feeding materials into the conveying pipeline. Common ones include feeding hoppers, rotary valves, etc. The pipeline system is the main channel for material transportation. The air source device provides the necessary compressed air or other gases. The separation device is used to separate materials and gases. The control system is used for automatic control of the entire process.

What is the formula for pneumatic conveying?

Gas volume flow calculation formula:
Q = qn / (1 - ε) [（G / A）^k （ρ / ρ0）^m P^(1-k-m [(Z1 / Z2) ((T1 + 273) / (T2 + 273))Q：gas volume flow，m3/h
qn：Gas standard volume flow，m3/min
ε：gas wear rate
G：Mass flow rate of conveyed materials，kg/h
A：given cross-sectional area，m2
ρ：Conveyed material density，kg/m3
ρ0：Standard density，1.2 kg/m3
P：pressure，kPa
k、m：Constants determined by the fluid state
Z1、Z2：Import and export gas compression
T1、T2：Inlet and outlet gas temperature，℃

Gas pressure drop calculation formula：

Conveying capacity calculation formula：