Water inflow pre-filter device for pumping station of nuclear power plant and pre-filter method adopting water inflow pre-filter device

Abstract

The invention discloses a water inflow pre-filter device for a pumping station of a nuclear power plant. The water inflow pre-filter device comprises a rack, a filter screen combined structure mountedon the rack, a lifting and dropping slide rail mechanism allowing vertical lifting and dropping of the rack relative to a water inflow channel as well as a fixed locking mechanism used for selectively locking or releasing a rack lifting and dropping position, wherein the fixed locking mechanism is arranged on the lifting and dropping slide rail mechanism or the rack, the depth of the filter screen combined structure in a flowing liquid is adjusted by the rack during lifting and dropping, so that interception and filter capabilities of the water inflow channel of the pumping station of the nuclear power plant can be enhanced, downstream operation load and maintenance cost can be reduced, and reliability and safety of a cold source system of the pumping station of the nuclear power plant are improved. Besides, the invention discloses a pre-filter method adopting the water inflow pre-filter device for the pumping station of the nuclear power plant.

Description

technical field [0001] The invention relates to the field of filtering water inlet channels of nuclear power plant pumping stations, in particular to a nuclear power plant pumping station water inlet pre-filtering device and a pre-filtering method thereof. Background technique [0002] With the advancement of science and technology and the development of humanities, nuclear power plants have become more and more mature and have played a huge role. The pumping station of the nuclear power plant provides water for its downstream cooling-related systems, so it is necessary to filter the seawater coming in from the upstream of the water inlet channel of the pumping station of the nuclear power plant before it can be transported to the downstream for use. [0003] At present, the domestic nuclear power plants under construction and in operation are all located on the coast, and all nuclear power plants rely on seawater as a heat sink to cool down the equipment on nuclear islands ...

AI Technical Summary

Problems solved by technology

[0005] Since 2013, incidents of jellyfish, Phaeocystis globosa red tide, sediment, small fish and shrimps, etc. affecting the water intake of the project have occurred in the water intake area of ​​domestic power stations, resulting in drum-shaped filters, SEC system shellfish trap filters and plate-type The pressure difference of the heat exchanger often rises, which even causes the CRF pump of some units to automatically jump due to the high pressure difference of the drum filter, which in turn causes the unit to reduce the load and even stop the reactor, which greatly increases the maintenance cost

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