What is a PD pump in ash handling system?

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A PD pump in an ash handling system refers to a positive displacement pump that is specifically designed for handling ash in power plants and other industrial facilities. These pumps play a crucial role in transporting ash from the collection point to the disposal area, ensuring efficient and reliable operation of the ash handling system.

### Features of a PD pump in ash handling system.

#### 1. Robust construction.

PD pumps used in ash handling systems are built to withstand the abrasive nature of ash particles. They are typically made of durable materials such as cast iron, stainless steel, or special abrasion-resistant alloys to ensure long-lasting performance.

#### 2. Positive displacement design.

Unlike centrifugal pumps, PD pumps operate by trapping a fixed volume of fluid or solid material and then discharging it at a constant rate. This makes them ideal for handling viscous or abrasive materials like ash without causing damage to the pump or affecting performance.

#### 3. Self-priming capabilities.

Many PD pumps used in ash handling systems are equipped with self-priming features, allowing them to create a vacuum and draw in the ash slurry without the need for manual priming. This ensures quick and easy startup, even after a shutdown or maintenance.

#### 4. High efficiency.

PD pumps are known for their high efficiency in transporting fluids or solids, making them an essential component of an ash handling system. They can operate at varying flow rates and pressures, ensuring consistent and reliable performance in conveying ash to the designated disposal site.

### How a PD pump works in an ash handling system.

1. **Ash collection**: Ash generated from combustion processes is collected in hoppers or silos before being transferred to the ash handling system for disposal.

2. **Feeding**: The collected ash is fed into the PD pump, which then traps a fixed volume of ash slurry within the pump chamber.

3. **Discharge**: The pump's positive displacement action forces the ash slurry out of the pump at a constant rate, allowing for smooth and controlled transfer of ash to the disposal area.

4. **Transport**: The ash slurry is conveyed through pipelines or channels to the designated disposal site, such as ash ponds or landfills.

In conclusion, a PD pump in an ash handling system is a critical component that helps transport ash efficiently and reliably from collection points to disposal areas. With their robust construction, positive displacement design, and high efficiency, these pumps are essential for the proper functioning of ash handling systems in power plants and industrial facilities.

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