Air replenisher
Choosing the appropriate gas supplementer is crucial for ensuring stable and efficient pulverized coal conveying. Below is a table summarizing key selection factors and recommendations, hoping to help you quickly grasp the key points:
I. Core Product Functions
Mixing Optimization
Installed at the outlet of the pulverized coal main pipe of the injection tank, it dynamically adjusts the gas supplement volume to dilute high-concentration pulverized coal into a stable solid-gas two-phase flow, solving the problems of pulverized coal accumulation and pipeline blockage in traditional conveying.


Precise Flow Control
Adopting an adjustable round nut design, by changing the gap of the gas supplement channel (adjustable from 0.5 to 5mm), it realizes stepless adjustment of the gas supplement volume from 30% to 120%, matching different pulverized coal injection volume requirements.
II. Key Technical Parameters
| Selection Dimension | Key Considerations | Model Selection Recommendations |
|---|---|---|
| Conveying Distance | ||
| Short distance (e.g., <100m) | Relatively low requirements for the accuracy and stability of gas supplement adjustment. | You can give priority to non-adjustable gas supplementers, which have simple structure, low cost and convenient replacement. |
| Medium and long distance (e.g., ≥100m) | It requires the gas supplementer to effectively break the material column that may form during the conveying process and flexibly adjust the gas supplement volume to maintain stable dense-phase conveying. | It is recommended to select the adjustable swirl gas supplement regulator. Its swirl gas channel design enables more sufficient and uniform powder-gas mixing, is less prone to pulsation, and has a wide adjustment range, making it more suitable for long-distance conveying. |
| Pulverized Coal Characteristics | ||
| Good fluidity and uniform concentration | Relatively standard requirements for the mixing and stability capabilities of the gas supplementer. | Standard models of swirl gas supplement regulators usually can meet the requirements. |
| Fine particle size and prone to pulsation | The gas supplementer needs to have excellent mixing capability to prevent pulsation and ensure stable conveying. | The swirl gas supplement regulator is a better choice, and its special design can effectively avoid pulsation. |
| Strong abrasiveness | Attention should be paid to the abrasion resistance of the equipment. | Ask the manufacturer whether they provide gas supplementers made of more wear-resistant materials such as ceramic lining or high-temperature alloy stainless steel. |
| Other Important Factors | ||
| Design Pressure | Select according to the maximum working pressure of the system. | Common design pressures include 1.0 MPa, 1.6 MPa, 2.5 MPa, etc. |
| Nominal Diameter (DN) | It needs to match the caliber of the upstream and downstream pipelines. | Common specifications include DN40, DN50, DN65, DN80, DN100, DN125, DN150, etc. |
| Installation and Maintenance | The structure of the adjustable gas supplementer is relatively complex, and the workload of replacement may be large. The non-adjustable one has a simple structure and is convenient to replace. | Weigh the adjustment requirements and maintenance convenience. |
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