Special permanent filter for nuclear power

Abstract

The invention discloses a permanent filter dedicated to nuclear power, which includes a fixed end, a fixed central axis, a plurality of filter screen assemblies and end covers; wherein each filter screen assembly includes an outer fastening ring, a connecting rod and a filter screen; wherein The fixed center shaft connects the fixed end and the middle part of the end cover to form the support structure of the filter screen. The fixed center shaft is fixed and connected by multiple short shafts through the threaded end. The net is fixed in the installation notch of the filter screen, and the inner side of the outer fastening ring is installed on the short shaft through a plurality of connecting rods, and the short shaft of each fixed central shaft corresponds to an outer fixed ring; The inner diameter of the components gradually decreases from left to right; the diameters of the two adjacent filter components, the narrow end of the left filter component and the wide end of the right filter component are matched with each other; the leftmost An end cover is installed on the outer side of the filter screen assembly, and a fixed end is installed on the rightmost filter screen assembly, and the fixed end is also docked with the fixed central axis.

Description

technical field [0001] The invention relates to the technical field of condensation water filtration, in particular to a permanent filter dedicated to nuclear power. 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 acid in the effluent...

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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