Nuclear power water feed pump mechanical seal magnetic filter

Abstract

The invention discloses a mechanically sealed magnetic filter for a nuclear power feedwater pump, which comprises an overflow cylinder body and a cylindrical filter fixed at the end of the overflow cylinder body and arranged in a Y shape with the overflow cylinder body; The inlet of the filter extends into the inside of the flow cylinder and is fixed by the connecting sleeve. The center point of the inlet of the cylindrical filter coincides with the central axis of the inner diameter of the flow cylinder; the inside of the cylindrical filter Install the ring-shaped filter cover, there is an installation gap between the filter cover and the inner wall of the cylindrical filter; the inner middle of the cylindrical filter is installed with a mounting rod that is axially consistent with the cylindrical filter, and the magnet ring is fixed at intervals on the mounting rod . The invention adopts a Y-shaped structure with an angle of 45 degrees, which is simple to manufacture and easy to replace the filter element; the Y-shaped structure is adopted, which is convenient for installation and has a large dirt holding capacity; the filter element adopts a cylindrical structure, and the flow rate is fast; the filter element is equipped with NdFeB high High-strength magnets can more effectively remove iron products in the filter.

Description

technical field [0001] The invention relates to the technical field of condensed water filtration, in particular to a mechanical seal magnetic filter for nuclear power feed water pumps. Background technique [0002] Nuclear power plants, also known as nuclear power plants, are power facilities that use the heat generated by one or several power reactors to generate electricity or generate electricity and heat. [0003] Taking the AP1000 nuclear power plant as an example, the condensate polishing system (including high-speed anode bed and high-speed mixed bed) is installed between the secondary circuit condensate pump and the condensate booster pump, and its basic function is to remove salt impurities in the condensate ( Such as sodium ions and sulfate ions, etc.) and mechanical impurities (mainly iron corrosion products). However, limited by the current structure, in currently operating nuclear power plants in China, it is still difficult to reach the standard for sulfuric ...

AI Technical Summary

Problems solved by technology

However, limited by the current structure, in currently operating nuclear power plants in China, the sulfuric acid radical in the effluent of the secondary loop condensate polishing system is still difficult to meet the standard, which has become a bottleneck that plagues the high-level operation of nuclear power plants.

[0004] In addition, through the commissioning of domestic nuclear power plants in recent years, it has been found that the flushing water volume of nuclear power units for the first time is huge and the flushing time is long. It can enter the fine treatment system when the suspended solids are less than 500mg / L, but nuclear power usually requires suspended matter <500mg / L to enter the fine treatment system), which leads to prolonged start-up time of the unit and poor economy

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