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Liquid ring pump definition
Liquid ring pump is a fluid conveying fluid machine, which by rotating the impeller mechanical energy transfer to the working fluid (rotating liquid ring), but also through the liquid ring on the gas compression, the energy transfer to the gas, so that the pressure, To achieve the purpose of suction vacuum (for vacuum pump) or pressure gas (for compressor), both collectively referred to as liquid ring pump. The main advantages of the liquid ring pump are: the working process is close to isothermal compression, the pump does not rub each other inside the metal surface, suitable for the transport of flammable or temperature-prone decomposition gas; can be used non-oil working fluid, Gas is uncontaminated; gases containing steam, moisture or solid particles can be delivered. Its structure is simple, without suction valve, stable and reliable work, uniform gas volume, but its efficiency is low, usually 30% to 50%, the maximum is only 55%. Liquid ring pump is mainly used for vacuum evaporation, drying, water pump, etc., the maximum volume of 300m³ / min. When the working water temperature is 15 ℃, the ultimate vacuum of the single-stage pump can reach 4kPa (30mmHg), two-stage pump can reach 2kPa (15mmHg) and the series ejector can reach 0.26-0.66kPa (2 ~ 5mmHg). Liquid ring compressors are mainly used for pressure delivery of gas, ethylene, chlorine, oxygen, etc. with a maximum capacity of 400 m³ / min or more. Single-stage compressor discharge pressure of 400 kPa, two levels of 600 kPa, special up to 2000 kPa.