molten salt circulation pumps for solar thermal power plants

The molten salt circulation pump is a vertical mixed-flow pump designed for high-temperature molten salt transportation, suitable for high-flow, medium and high head conditions. With mature hydraulic design, it ensures high efficiency, low submergence depth, and low cavitation allowance for stable and reliable operation.

Molten salt, with its high specific heat capacity and excellent heat transfer, is widely used as the main heat transfer medium in solar thermal power plants. These systems allow power generation for 6 to 15 hours after sunset, improving energy utilization. Vertical molten salt pumps are commonly installed on storage tanks, simplifying system construction, reducing auxiliary components, and minimizing heat loss.

molten salt circulation pump Features:

1. Optimized suction port design: Lower submergence depth reduces energy loss and enhances suction performance.
2. Optimized cavitation margin: First-stage impeller, induced wheel, or high suction ratio impeller design effectively reduces NPSHR and improves cavitation resistance for stable high-temperature operation.
3. Plain bearings for thermal expansion: High-performance bearings keep the shaft centered and adapt to thermal expansion, extending equipment service life.
4. Main seal throat bushing design: Controls trace leakage, ensures leaks return to the molten salt tank, avoiding pollution and resource waste.
5. Auxiliary seal: Retaining ring seal prevents molten salt from leaking into the atmosphere, ensuring safety.
6. High-efficiency thermal isolation: Special isolation system between hot and cold parts reduces heat transfer and heat loss.
7. Easy to dismantle interstage coupling: Facilitates maintenance, reducing downtime.
8. Special thermal expansion design: Extended wear ring area and clearance design ensure stability and reliability in high-temperature operation.

Application areas:

• Solar thermal power plants: Key for molten salt storage and transfer, enabling continuous power generation during night/cloudy days and improving overall efficiency.
• Ionic membrane caustic soda production: Circulates high-temperature molten salt for stable, efficient production.
• Alumina production: Transports high-temperature liquids to maintain reaction conditions and improve efficiency.
• Melamine production: Participates in heating and heat exchange for stable reactions and temperature control.
• Organic chemical industry: Conveys high-temperature liquid media to maintain reaction temperature and pressure.
• Other high-temperature liquid transportation: Suitable for metallurgical and other industries, transporting special high-temperature liquids without solid particles.