Integrated water ring vacuum pump of marine steam turbine

Abstract

The invention relates to an integrated water ring vacuum pump of a marine steam turbine. A water tank is provided with an independent water tank negative-pressure chamber and a water tank positive-pressure chamber which are both filled with condensed water. The water ring vacuum pump is a double-cavity water ring vacuum pump, an air inlet of a high-vacuum cavity of the water ring vacuum pump is communicated with an air suction port of a condenser through a pipeline, and an air outlet of the high-vacuum cavity is communicated to an air exhaust port of the condenser at the upper air part of thewater tank positive-pressure chamber; an air inlet of a low-vacuum cavity of the water ring vacuum pump is communicated with a steam seal air suction port introduced by the water tank negative-pressure cavity through a pipeline, and an air outlet of the low-vacuum cavity is communicated to a steam seal exhaust port of the upper air side of the water tank positive-pressure chamber through a pipeline; a cooling coil pipe of the water tank positive-pressure chamber is connected to a cooling water inlet and a cooling water outlet of the outer side of the water tank through inlet and outlet pipes;a communicating valve and a communicating pipe are arranged in the water tank negative-pressure chamber and communicated with the water tank positive-pressure chamber, and working water in the water tank positive-pressure chamber is guided into the water tank negative-pressure chamber; an air outlet is formed in the top of the water tank and is used for exhausting air pumped out of the water ringvacuum pump.

Description

technical field [0001] The invention relates to a water ring vacuum pump for a marine steam turbine, in particular to an integrated integrated water ring vacuum pump. Background technique [0002] The steam turbine condenser air extraction system is mainly used to continuously extract the air leaked into the steam side space of the condenser and the loose part of the pipeline to maintain the vacuum of the condenser and good heat transfer, reduce the exhaust pressure, increase the The available enthalpy drop can improve the safety and efficiency of operation, so as to ensure the economical efficiency of the steam turbine. The traditional equipment for evacuating the condenser mainly adopts the steam-jet type extractor and the water-jet type extractor, but these two types of equipment have the disadvantages of low efficiency, high noise, and need to consume steam or water continuously. With the development in the direction of high parameters and large capacity, the economical...

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Problems solved by technology

[0004] In terms of marine steam turbines, due to the small power of the unit, the condenser extraction system still uses a steam-jet extractor, and the steam-seal extraction system is composed of a steam-jet extractor, a steam-seal cooler, and a steam-seal pressure regulator. Composition, the above equipment is installed separately, usually installed next to the steam turbine, and a large number of pipelines, valves and other accessories need to be configured at the same time, which not only greatly increases the weight and size of the entire steam turbine device, but is not conducive to the integrated design and miniaturization design of the steam turbine, and occupies a limited space At the same time, the large air noise during the operation of the steam jet extractor also has a non-negligible impact on the health of the operators in the airtight cabin

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