alstom coal pulverizer diagram

Alstom Coal Pulverizer Diagram: A Comprehensive Overview

Coal pulverizers play a critical role in power generation by grinding coal into fine powder for efficient combustion in boilers. Alstom, now part of General Electric (GE), has been a leading manufacturer of coal pulverizers, offering robust and high-performance designs. Understanding the Alstom coal pulverizer diagram helps in visualizing its components and operational principles.

Key Components of an Alstom Coal Pulverizer

1. Grinding Rolls and Race – The primary grinding mechanism consists of rotating rolls pressing against a stationary race. Coal is crushed between these components to achieve the desired fineness.
2. Classifier – Located at the top of the pulverizer, the classifier separates fine coal particles from coarse ones, ensuring only properly sized coal exits for combustion.
3. Mill Housing – The outer structure encloses the grinding chamber, providing structural support and containment for the grinding process.
4. Primary Air Fan – Supplies hot air to dry coal and transport pulverized coal to the burners. Proper airflow ensures efficient combustion and prevents mill fires.
5. Coal Feed Pipe – Delivers raw coal from the bunker into the grinding zone at a controlled rate for consistent operation.
6. Rejects Discharge System – Removes ungrindable materials like rocks or tramp metal to prevent damage to internal components.

Working Principle of Alstom Coal Pulverizers

The process begins when raw coal enters through the feed pipe onto the rotating grinding table. Centrifugal force pushes the coal outward under heavy-duty grinding rolls, crushing it into fine particles. Hot primary air flows upward, drying the coal and carrying it toward the classifier. Oversized particles are rejected back into the grinding zone while finely pulverized coal exits through pipes leading to burners in the boiler furnace.

Advantages of Alstom Coal Pulverizers

- High grinding efficiency ensures optimal fuel fineness for complete combustion.
- Robust construction minimizes wear and extends operational life.
- Adjustable classifier settings allow precise control over particle size distribution.
- Integrated safety features reduce risks associated with mill fires or explosions.

Maintenance Considerations

Regular inspection of grinding rolls, liners, and classifiers is essential for sustained performance. Monitoring vibration levels helps detect imbalances or misalignments early, preventing costly downtime.

Understanding an Alstom coal pulverizer diagram provides