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In a vacuum generating system having a liquid ring vacuum pump preceded in a gas flow path by a precompressor and followed by a liquid separator, the precompressor is driven by steam produced in a heat exchanger in contact with the working fluid of the vacuum pump. The working fluid is kept at a tem

In a vacuum generating system having a liquid ring vacuum pump preceded in a gas flow path by a precompressor and followed by a liquid separator, the precompressor is driven by steam produced in a heat exchanger in contact with the working fluid of the vacuum pump. The working fluid is kept at a temperature exceeding the boiling point of water.

대표청구항 ▼

A vacuum generating system comprising: a liquid ring vacuum pump having a gas inlet, a gas mixture outlet and a working fluid inlet; a liquid separator connected at an input to said gas mixture outlet of said pump for receiving a compressed gas and fluid mixture therefrom, said separator being conne

A vacuum generating system comprising: a liquid ring vacuum pump having a gas inlet, a gas mixture outlet and a working fluid inlet; a liquid separator connected at an input to said gas mixture outlet of said pump for receiving a compressed gas and fluid mixture therefrom, said separator being connected at a fluid output of said working fluid inlet of said pump for delivering thereto working fluid at least partially separated from said compressed gas and fluid mixture; a precompressor having a gas outflow port connected to said gas inlet of said pump for delivering thereto partially compressed gas for further compression; heat transfer means, in contact with working fluid circulating between said separator and said pump, for transferring heat energy from said working fluid to a coolant, said working fluid having a higher boiling point than the boiling point of said coolant, the operating temperature of said fluid in said pump and said separator being higher than the boiling point of said coolant; and conduit means extending between said heat transfer means and said precompressor for transporting thereto from said heat transfer means said coolant in vaporized form for driving said precompressor.