Special isometry type desalination device filter head for nuclear power plants

Abstract

The invention relates to the technical field of nuclear power plants, in particular to a special isometry type desalination device filter head for the nuclear power plants. The isometry type desalination device filter head comprises a connection tube, a conical hopper, screw caps, a sleeve tube, a sealing loop, a top plate, positioning ribs, drawing rods, a sprio loop, end disks, filter disks, a bottom plate, water-through holes, ringer disks and drawing disks. A plurality of the annular disk-shaped filter disks are vertically overlapped, and a spacing disk is arranged between every two adjacent filter disks. The thicknesses of all of the spacing disks are equal. The three drawing rods sequentially pass through the bottom plate, the sleeve loop of the plurality of the spacing disks and the top plate from bottom to top, and the three positioning ribs are uniformly distributed with an angle of 120 degrees on a circumference plane of the bottom plate. The invention can avoid the phenomenon of loss of ion exchange resins because of nonuniform water-through gaps in the prior art.

Description

technical field [0001] The invention relates to the technical field of nuclear power plants, in particular to a special equidistant desalter filter head for nuclear power plants. Background technique [0002] The inlets and outlets of the yin bed, yang bed, and wet bed of the water treatment equipment desalter of the existing nuclear power plant 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 Purified water is passed through to obtain clean water. [0003] The existing filter head structures include wire-wound type and laminated type. The wire-wound filter head is easy to be damaged. When the steel wire is wound, it needs to be fixed on the skeleton by spot welding. The welding deformation is large, the steel wire has low strength and is easy to deform, and the gap between the steel wire and the steel wire is difficult to control. The filter tube of the laminated filter head is compo...

AI Technical Summary

Problems solved by technology

The wire-wound filter head is easy to be 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, and it is easy to deform. The gap between the steel wire and the steel wire is difficult to control.

The filter tube of the laminated filter head is composed of several filter sheets with the same structure. Each filter sheet has a symmetrical small boss in the cross direction, which is integrated with the filter sheet. Therefore, after several sheets are stacked and combined Four ribs are formed in the axial direction, and four water passage gaps are formed at equidistant intervals along the circumference between the connected two pieces. This device is not easy to be damaged compared with the wire-wound filter head. Its disadvantages are:

[0004] 1. Since the height of the small boss is prone to deviation during production, and the water gap between the sheets is controlled by the contact of the small bosses at four parts, this will make the size of the water gap uneven, If the gap is too large, the ion exchange resin will be lost.

[0005] 2. Since there are four small bosses between two adjacent filter sheets, this also reduces the water permeability of the filter head

[0007] 1. The processing procedure of the filter tube is cumbersome, and the processing precision is very high, and the processing difficulty is relatively high;

[0008] 2. Due to the vibration of the long-term water flow impact on the filter, individual filters will be fatigued and broken under repeated high-frequency bending

Due to the limited length of the filter head, increasing the thickness of the filter will undoubtedly reduce the number of water gaps, which will greatly reduce the water permeability of the filter head and reduce the use efficiency of the device

[0009] 3. In the above scheme, all the filters are an inseparable whole, which brings great difficulty to the regular dismantling and washing work and greatly reduces the efficiency of dismantling and washing work

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