2BE4-720 Water Ring Vacuum Pump for Power Plant FGD Systems

Large thermal power plants need vacuum equipment that can handle heavy loads and run for long hours. In an FGD system, stable vacuum is important for several process steps, especially when the system has a high gas load. This is why large water ring vacuum pumps such as the 2BE4-720 are often considered for large power plant projects.
The 2BE4-720 is one of the largest models in the 2BE4 series. Its suction capacity can reach 38,100 m³/h at 340 r/min, making it suitable for large industrial vacuum systems. For a power plant with a large FGD system, the key question is not simply how big the pump is, but whether its actual capacity matches the process demand.

Why Does an FGD System Need a Large Vacuum Pump?

Flue gas desulfurization involves more than removing sulfur dioxide from flue gas. Depending on the process design, the system may include absorption, slurry circulation, filtration, drainage, and other supporting equipment.
Some of these operations need stable vacuum conditions. The vacuum pump removes air and other non-condensable gases from the system and helps maintain the required pressure conditions.
If the pump is too small, the system may take longer to reach the required vacuum. More importantly, the vacuum can become unstable when the gas load changes. This is a bigger concern in large thermal power plants because the process load is much higher than in small industrial systems.

Why Is the 2BE4-720 Suitable for Large Power Plants?

The main advantage of the 2BE4-720 is its high suction capacity. According to the technical data, the model has a suction capacity of 21,900 to 38,100 m³/h, or 365 to 635 m³/min, depending on speed.
Its operating speed ranges from 190 to 340 r/min. The maximum shaft power ranges from 345 to 795 kW, while the motor power can reach 900 kW. The limited vacuum is 150 mbar absolute.
These figures show that the 2BE4-720 is designed for high-capacity industrial applications. It can handle a large gas load while using the water ring principle to provide continuous vacuum operation.

High Capacity for High Gas Loads

When an FGD system has a large gas load, pump capacity becomes one of the first selection points. At 340 r/min, the 2BE4-720 can reach 38,100 m³/h.
But engineers should not select the pump based only on this maximum number. The actual suction capacity depends on the working vacuum, gas temperature, water temperature, piping resistance, and other operating conditions.

Designed for Continuous Operation

Power plants often run for long periods, so vacuum equipment needs to be reliable under continuous operating conditions. A water ring vacuum pump is a practical choice for applications where the gas may contain moisture or where stable industrial vacuum performance is required.
The working liquid forms a liquid ring inside the pump and helps create the sealing effect. Proper water circulation and temperature control are therefore important for maintaining pump performance.

How Should the 2BE4-720 Be Matched With an FGD System?

The first step is to determine the actual vacuum requirement and gas flow. Engineers can then find the operating point that matches the process instead of simply choosing the largest model.
For example, if an FGD system requires high gas flow at a moderate vacuum level, a 2BE4-720 may provide enough capacity with a suitable operating speed. In some projects, several pumps may also be installed to provide standby capacity or allow flexible operation.
The complete system should be considered together. Piping size, valves, gas-liquid separation, working water circulation, heat removal, and control methods can all affect the final vacuum performance.

2BE4-720 or a Smaller 2BE4 Model?

The 2BE4-720 is not automatically the best choice for every power plant. Model selection should follow the actual vacuum load.
For example, the 2BE4-600 has a maximum suction capacity of 21,600 m³/h, while the 2BE4-620 can reach 26,200 m³/h. The 2BE4-670 can reach 30,960 m³/h. The 2BE4-720 provides the highest capacity in this group, reaching 38,100 m³/h.
This makes the selection a balance between required capacity, vacuum level, motor power, operating conditions, and system redundancy.

What Should Engineers Check Before Ordering?

Before ordering a 2BE4-720, engineers should confirm the required suction capacity at the actual working vacuum. Gas composition and temperature should also be checked, especially when the system handles corrosive or wet gases.
The working water temperature and circulation rate are also important. If the water temperature becomes too high, the actual vacuum performance may decrease.
For a large power plant, maintenance space, spare capacity, and long-term operating cost should also be included in the design.

Conclusion

The 2BE4-720 water ring vacuum pump is a high-capacity solution for large industrial vacuum systems. With a maximum suction capacity of 38,100 m³/h, it can be considered for large FGD applications in thermal power plants where stable and continuous vacuum operation is required.
However, choosing the right pump is not simply about selecting the largest model. The better approach is to match the 2BE4-720 with the actual FGD vacuum load, working pressure, gas conditions, water temperature, piping system, and required standby capacity. This approach can help engineers build a more stable and practical power plant vacuum system.

vacuum pump product information

Web: http://www.greentechblower.com  (Group Web)  ‖  http://www.zqblower.cn  (Chinese)  ‖ http://www.ringblower.cn/ (Ring blower)  ‖  http://www.china-blower.com  (Roots Blower)  ‖  https://www.zibovacuumpump.com(Vacuum Pump)