Pneumatic conveying System

Customer Requirements

- Raw Material: Carbon black powder, density: 0.7; particle size: ≤3mm 

- Conveying Capacity: 15t/h 

- Conveying Distance: Horizontal: 40m, Vertical: 10m, with 6 elbows 

System Design Includes: 

1. Dust Removal System:

   - Material: Carbon steel 

   - Filtration area: 64㎡ 

   - Dimensions: 3m × 3m 

   - Includes air tank, pulse valve, pressure gauge, discharge valve, etc. 

2. Roots Blower:

   - Airflow: 3000m³/h 

   - Air pressure: -49kPa 

   - Power: 75kW 

3. Pipelines (including exhaust pipes):

   - Suction nozzle DN200, material: carbon steel 

   - Total length: 100m (including flanges, etc.) 

4. Material Pump Bin:

   - Material: Carbon steel 

   - Effective volume: 1.3m³ 

5. Wear-Resistant Elbows:

   - Material: Carbon steel with ceramic lining 

6. Control System, Instruments, Cables, Cable Trays, etc.

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Process Plan Description

1. Introduction to the Pneumatic Conveying System

The pneumatic conveying system utilizes the kinetic energy of gas to achieve the loading, unloading, and transportation of bulk materials through a negative pressure suction method. Pneumatic conveying uses sealed pipelines, offering advantages such as no dust leakage or pollution, environmental friendliness, continuous operation, and low maintenance requirements. 

• Negative Pressure Pneumatic Conveying Diagram (Figure 1 attached) 

2. Carbon Black Conveying Line Project Plan

2.1 Use of Roots Blower–Enhancing System Efficiency 

As the power component of the carbon black transfer process, the performance of the blower directly affects the efficiency of the entire operation. This system uses a high-pressure roots blower, which offers advantages such as high airflow, high pressure, high efficiency, low noise, simple structure, easy maintenance, long service life, and wide applicability. 

- Specific Parameters: 

  - Airflow: 3000m³/h 

  - Air pressure: -49kPa 

  - Power: 75kW 

  - Load: Static load: 3000kg, Dynamic load: 800kg 

- Roots Blower Diagram (Figure 2 attached) 

2.2 Use of Wear-Resistant Elbows–Ensuring System Reliability 

In the pneumatic conveying pipeline, elbows are used at points where the material flow direction needs to change. For this project, wear-resistant elbows with a reinforced structure are used. The elbows are made of carbon steel with a ceramic lining, which reduces wear on the outer wall of the elbow, extends its service life, and ensures the normal operation of the equipment. 

- Special Elbows for Granular Materials (Figure 3 attached) 

2.3 Use of Fluidized Suction Nozzles–Ensuring System Stability 

In this project, due to the large conveying capacity, the material at the initial section of the conveying pipe has a low movement speed, causing the material to settle against the pipe wall and enter a sliding flow state. To address this, fluidized plates are installed at the material suction inlet. These plates use air within the pipeline to fluidize and agitate the material, ensuring more uniform feeding, improved material flowability, and enhanced system stability. 

- Fluidized Suction Nozzle Diagram (Figure 4 attached) 

- Process Flow Diagram (Figure 5 attached)