Technical Description of the Air Supplement Device Produced by Xiangye
Product Overview
The air supplement device is a key equipment specifically designed for pulverized coal pneumatic conveying systems. It is installed at the outlet main pipe of the injection tank and is used for dynamic dilution and mixing adjustment of high-concentration pulverized coal. Its core function is to optimize the solid-gas two-phase flow state through precise air supplementation, achieving full mixing of pulverized coal and gas to form a stable dense-phase fluidized conveying, thereby ensuring long-distance, high-efficiency, and low-energy continuous conveying of pulverized coal.

Core Functions
1. Concentration Adjustment: Dilutes high-concentration pulverized coal through outer-ring air supplementation to prevent pipeline clogging.
2. Flow State Optimization: Uses jet disturbance at specific angles to break up coal powder agglomeration and form a uniform mixed flow.
3. Flow Rate Control: Adjusts the air supplementation volume to indirectly regulate the pulverized coal conveying rate, adapting to production fluctuation demands.
4. Stable Conveying: Suppresses the formation of material columns, ensuring the continuity and reliability of long-distance conveying.
Technical Parameters
| Item | Parameters |
|--||
| Applicable Medium | Pulverized Coal + Nitrogen/Air |
| Design Temperature | ≤100℃ |
| Design Pressure | 1.0 MPa / 1.6 MPa / 2.5 MPa |
| Adjustment Method | Mechanical Adjustable Type / Fixed Type |
| Compatible Pipeline | Injection Tank Outlet Main Pipe |

Structural Design Features
1. Double-Sleeve Structure
- Inner Pipe: Conveys high-concentration pulverized coal (main channel).
- Outer Annular Chamber: Air supplementation channel with adjustable annular gap (adjustable models).
2. Jet Mixing Technology
- Outer-ring air supplementation is injected at a tangential angle of 15°-30°, forming a spiral jet to enhance pulverized coal diffusion.
- Gas-solid contact area increased by over 50%, with mixing uniformity reaching industry-leading levels.
3. Dynamic Adjustment Mechanism (Adjustable Type)
- Utilizes precision threaded adjustment components; rotating the round nut can real-time adjust the annular gap opening (0.5-5mm), with an air volume adjustment range of 1:10.
- Supports online fine-tuning, matching operational changes without the need for shutdown.

4. Industrial-Grade Reliability
- Main Material: Wear-resistant alloy steel (inner wall can be composite ceramic coated, extending service life by 3 times).
- Sealing Design: Dual graphite packing seal, resistant to high-temperature media up to 100℃.
Application Scenarios
- Steel Metallurgy: Core component for dense-phase conveying in blast furnace pulverized coal injection systems
- Power Industry: Homogenized pulverized coal supply for coal-fired boilers
- Chemical Industry: Long-distance pneumatic conveying of powdered materials