Filter head apparatus of nuclear plant desalting device

Abstract

The invention relates to a filter head apparatus of a desalter used for a nuclear power plant which is a part of a water treatment equipment of the nuclear power plant and belongs to the water treatment field. The apparatus is mainly characterized by the improvement to the structure of existing sheet-superposed type filter head apparatuses, in particular to the structure improvement of filter tubes formed by a plurality of superposed sheets which is changed into an integrated structure formed by processed water-filtering apertures and isolating ribs. The invention has high intensity and no welding distortion, and can be finely processed by a machine tool with steady apertures and high accuracy, thus guaranteeing the flow aperture and enhancing the quality of purified water. The filter head apparatus of the invention can displace the existing sheet-superposed filter head apparatus.

Description

technical field [0001] The invention relates to a filter head device for a desalter of a nuclear power plant, which is a component in water treatment equipment of a nuclear power plant and belongs to the technical field of water treatment. Background technique [0002] At present, the inlets and outlets of the desalter yin bed, yang bed, and mixed bed of the water treatment equipment in nuclear power plants are all equipped with filter head devices, also known as water caps, which are used to prevent the passage of ion exchange resins, but can make Purified water is passed through to obtain clean water. [0003] The existing filter head device structure types include wire-wound type, laminated type, etc. The wire-wound filter head device is easily damaged. When the steel wire is wound, it needs to be fixed on the frame by spot welding. The welding deformation is large, the strength of the steel wire is low, it is easy to deform, and the gap between the steel wire and the st...

AI Technical Summary

Problems solved by technology

The wire-wound filter head device is easy to be damaged, and the steel wire needs to be fixed on the frame by spot welding when winding, the welding deformation is large, the strength of the steel wire is low, it is easy to deform, and the gap between the steel wire and the steel wire is difficult to control

The structure of the laminated filter head device includes a connecting pipe, an upper cover, a filter tube, a frame, a lower cover, and studs, nuts, gaskets, etc. The filter tube sleeved outside the frame is composed of several pieces of filters with the same structure. Combination structure, one side of each piece has relatively symmetrical small bosses in the cross direction, so after several pieces are superimposed and combined, four ribs are formed in the axial direction, and four water passage gaps are formed at equal intervals along the circumference between two adjacent pieces. Although this kind of laminated filter head device solves the shortcoming of easy breakage in the wire-wound filter head device, the water passage gap between the sheets is formed by the contact control of the small bosses at four parts, so the water passage gap sometimes Too large, sometimes too small, it is easy to cause ion exchange resin loss, which seriously affects the purified water quality

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