Two-stage Liquid ring vacuum pump

　　■ Applications

　　● Perfect design, reasonable structure, reliable performance, especially suitable for vacuum drying, concentration, evaporation, distillation, dehydration, filtration and other processes in the industries of chemical, food, pharmaceutical, textile, electric power, paper, metallurgy, instrument and so on.

　　● Using as the fore pump of Roots vacuum pump gets ideal effect.

　　■ Typical applications

　　? Vacuum evaporation / distillation process for evaporators

　　Evaporator vacuum system generally requires large suction capacity with the inlet vacuum of 6-10Kpa. Pumping capability of single-stage water ring vacuum pump in this interval is quite weak, while the two-stage one shows its greatest pumping capability. Efficiency is increased by 30% or more with the same energy consumption.

　　● Atmospheric and vacuum distillation unit on the top of the fine chemical tower

　　Atmospheric and vacuum distillation unit also requires larger suction capacity at lower vacuum levels. Even to choose the single-stage water ring vacuum pump with a primary air ejector, in the suction pressure of 5kPa-6Kpa, the pumping rate is only 65-70% (max) of that of the 2BE1S pump. Therefore, 2BE1S series water ring vacuum pump is the ideal choice for atmospheric and vacuum distillation unit.

　　●Power plant steam turbine condenser vacuum device

　　At present, power plant condenser mainly uses 2BE1 series of water ring vacuum pump combined with atmospheric ejector. The degree of vacuum is increased, but the pumping efficiency is reduced and energy consumption is high. The maximum suction capacity of 2BE1S series two-stage water ring pump can reach 7500m3 / h. With high-quality heat exchanger, gauge and valves, it can meet the requirements of high reliability.

　　● For roots vacuum pump units

　　Choosing two-stage water ring pump coupled with high-quality control system for roots vacuum unit is the key to ensure long-term smooth operation. At present, the water ring Roots unit generally uses 2BE1 and 2BV series water ring vacuum pump as the fore one, but there are the problems of Roots pump being overloaded and heated and life shortage. Equipped with 2BE1S series two-stage water ring pump, the unit is able to keep great suction capacity, that is, the outlet pressure of roots pump is reduced and it can be kept working within the allowable pressure range, no overloaded or overheating, so as to keep the unit a safe and reliable running.

　　■Comparison and selection of two - stage liquid ring pump and single stage one

　　Two-stage and single-stage water ring vacuum pumps are designed for different operating conditions. From the above curve, it can be seen that the pumping rate of the single-stage one is decreased greatly in the range of high vacuum degree (less than 20000Pa), and it is even less than 30% of the maximum pumping rate at 5000 to 10000Pa. In this case, work efficiency is extremely low and power consumption is much high. But it shows its advantages of large pumping capacity in rough vacuum range. The two-stage one can get larger pumping rate in higher vacuum range, or maintain high vacuum at larger pumping rate. In this case, its efficiency is increased by 35%-40% than that of the single one, energy consumption is decreased accordingly. Therefore, it is only to choose the appropriate vacuum pump according to the working conditions, can it keep economical running.

　　■ Technical Data

　　For more detailed information, please contact us.