How Do Ejector Vacuum System Applied?
Ejector vacuum systems, also known as jet ejectors or steam jet ejectors, are commonly used in industrial plants for creating a vacuum in vessels and process equipment. They operate based on the Venturi effect where a high-velocity fluid jet is used to entrain another fluid and then discharge the mixed fluids against a counter pressure.
Here’s how ejector vacuum systems are applied in industrial plants:
Chemical Process Vacuum Systems:
- Distillation: Ejectors provide the necessary vacuum for distillation columns, especially during the production of fine chemicals and pharmaceuticals, where heat-sensitive materials require low-temperature processing.
- Reactors: They are used to evacuate reactors before starting a reaction to ensure that no air or moisture affects the chemical reaction.
Deaeration:
- In the power industry, deaerators equipped with ejectors remove air and other non-condensable gases from boiler feedwater, thus reducing corrosion in boilers, pipelines, and other equipment.
- In the food and beverage industry, vacuum evaporation is used to concentrate liquids without boiling off the essential components or burning sensitive materials, preserving flavors and nutrients.
- In the mining and metallurgical industries, ejector systems help draw slurry through filters for mineral processing.
Pneumatic Conveying:
- Ejector systems enable the transportation of bulk solids through pipelines, commonly used in the grain handling, plastics, and pharmaceutical industries.
Vacuum Cooling:
- In agriculture, vacuum cooling is applied to rapidly cool freshly harvested produce, extending shelf life and maintaining quality.
Crystallization:
- Vacuum systems are critical in the controlled crystallization of substances, which is vital in producing consistent and pure product batches in pharmaceutical manufacturing.
