An ejector is a typical two-phase flow device for water and gas. The momentum required for the gas phase movement comes entirely from the water jet, with the gas moving under the "envelopment" of water quality points. This achieves high efficiency in the suction chamber through cross-sectional area and flow velocity. This equipment fundamentally differs from the structure of past water and steam jet pump groups. It employs a spiral nozzle to break the traditional vertical and crossed flow design of water and gas, which evenly distributes air quality points around the water jet after passing through the spiral nozzle, further increasing the contact area and enhancing mixing capabilities. This results in co-directional flow, which is beneficial for the water jet to expel the gas, significantly improving the suction efficiency. It also avoids the slanting of the water jet and the occurrence of vibrations, advantages that are not available in rotary vacuum pumps and older ejectors.
Water Jet Vacuum Pump is used for extracting steam condenser vacuum and other vacuum equipment in thermal power plants, belongs to energy-saving and environmentally friendly type.
Application Scope: Retrofit of old water extraction for N3MW to N600MW units, steam extraction to water extraction, or for use with new units.
Section 2: Features of Water Jet Vacuum Pump:
Simple structure, safe and reliable, long lifespan, low noise, and low investment.
2. Low water quality requirements; components with corrosion-resistant materials and special design for high efficiency.
3. Excellent startup performance, low energy consumption, and fast vacuum formation.
4. Enables the utilization of residual velocity, suctioning non-condensable gases within the shaft seal heater.