WO2017012264A1

WO2017012264A1 - Filter module of containment recirculation filter

Info

Publication number: WO2017012264A1
Application number: PCT/CN2015/098567
Authority: WO
Inventors: 周国丰; 邵慧超; 王晓; 于江; 张立德; 帅剑云; 吴伟
Original assignee: 中广核研究院有限公司; 中国广核集团有限公司; 中国广核电力股份有限公司
Priority date: 2015-07-20
Filing date: 2015-12-24
Publication date: 2017-01-26
Also published as: GB201719311D0; CN105056614A; GB2554599A; GB2554599B8; GB2554599B; CN105056614B

Abstract

Disclosed is a filter module (1) of a containment recirculation filter, comprising a collector groove (11) and a plurality of filter cylinders (12), wherein the collector groove (11) comprises two side walls (111) opposite to each other, and a top wall (112) and a bottom wall (113) opposite to each other, the top wall (112) being connected between the upper ends of the two side walls (111), the bottom wall (113) being connected between the lower ends of the two side walls (111), and the two ends the collector groove (11) being opened; and each side wall (11) is respectively provided with a plurality of filter cylinder holes (111a), and the plurality of filter cylinders (12) are mounted at the filter cylinders holes (111a) of the two side walls (111) in one-to-one correspondence. The collector groove (11) is of a symmetrical structure, and can be easily processed and formed. The plurality of filter cylinders (12) are respectively arranged on the two side walls (111), and therefore, the torques, generated by the filter cylinders (12) on both sides, on the collector groove (11) counteract each other, so that the filter module (1) has a stable structure, and has no need for an additional support component to support the collector groove (11), so as to enable the filter module (1) of a containment recirculation filter to be installed more simply.

Description

Containment Recirculation Filter Filtration Module

Technical field

The invention relates to the technical field of a safety system of a pressurized water reactor nuclear power plant, in particular to a safety shell recirculation filter filter module.

Background technique

The pit located at the bottom of the reactor containment of the PWR nuclear power plant is used to collect coolant from the primary circuit when a major leak is collected. After a baseline accident such as a coolant loss accident (LOCA) or a main steam pipe rupture (MSLB) at a pressurized water reactor nuclear power plant, the coolant enters the containment pit through the break, and the coolant passes through the containment in the pit. The circulating filter is filtered and then passed through the pump unit into the safe injection system (RIS) and the containment spray system (EAS) for reactor cooling to avoid serious core damage and containment overpressure.

The coolant entering the containment pit after the accident is interspersed with a large amount of insulation and other material fragments, which must be filtered through a recirculation filter to ensure safe operation of the safety injection system and the containment spray system. Therefore, the containment recirculation filter is an important equipment for the safety system of the pressurized water reactor nuclear power plant. Under the working condition of the recirculating condition, its working condition directly affects the normal operation of the safety injection system and the safety shell sprinkler system. The filter module is the core component of the recirculation filter for filtering.

As shown in FIG. 1 , the conventional filter module a includes a box-shaped bus bar a1 and a plurality of filter cartridges a2. One side wall of the bus bar a1 defines a plurality of filter cartridge holes, and the filter cartridge a2 is correspondingly fixed to the bus bar a1. The side of the filter cartridge is located at the hole. The filter module a of the structure has the following disadvantages: one side wall of the bus groove a1 is open and the other side wall is not open, the structure is asymmetrical, and the processing is not easy; the filter cartridge a2 is fixed only to one side of the bus groove a1 after being fixed. That is, the filter cartridge a2 constitutes a cantilever structure and generates a large torque to the busbar a1. To counteract the influence of this torque, it is also necessary to additionally provide a support member such as the support plate a3 to support the busbar a1, which is added. Installation difficulty.

In order to solve the above problems, it is necessary to provide a filter module that is easy to process, structurally stable, and does not require a support assembly.

Summary of the invention

It is an object of the present invention to provide a filtration module that is easy to process, structurally stable, and that does not require a support assembly.

In order to achieve the above object, the present invention provides a containment recirculation filter filter module comprising a combiner tank and a plurality of filter cartridges, the combiner trough including opposite side walls and opposite top and bottom walls, a top wall is connected between the upper ends of the two side walls, the bottom wall is connected between the lower ends of the two side walls, the two ends of the flow channel are open; and the two side walls are respectively provided with a plurality of filter cartridges And a plurality of the filter cartridges are installed in one-to-one correspondence with the filter cartridge holes of the two side walls.

Compared with the prior art, since the filter cartridge holes are respectively disposed on the two side walls of the confluence tank in the containment recirculation filter filter module of the present invention, the confluence trough is a symmetrical structure. Easy to shape. A plurality of the filter cartridges are respectively disposed on the two side walls, so that the torque generated by the filter cartridges on the two sides of the filter tank cancel each other, so that the structure of the filter module is stable, and no additional support components are needed. Supporting the manifold, thereby facilitating installation of the containment recirculation filter module.

Preferably, the containment recirculation filter filter module further comprises a vortex grille in a grid structure, the vortex grille being mounted on the top wall and covering the filter cartridge. When the filter is in operation, the vortex formed above the filter cartridge reduces the working efficiency of the filter, so that the anti-vortex grille can be provided to effectively reduce the formation of vortices.

Specifically, the number of the anti-vortex grids is two, and one ends of the two anti-vortex grids are respectively fixed on the top wall and respectively extend to the outside of the two side walls, and the two anti-vortex grids respectively Covering the filter cartridge on the corresponding two of the side walls.

More specifically, the containment recirculation filter filter module further includes a plurality of connecting members, wherein two ends of the connecting member respectively define a connecting through hole; the top wall is spaced apart from the two rows of protruding studs. One end of the anti-vortex grille defines a row of through holes; the two rows of the studs respectively pass through the through holes of the two anti-vortex grills, and the two ends of the connecting member are pressed to the two sides. On the vortex grid, two of the studs corresponding to the positions of the two rows of the studs respectively pass through the two connecting through holes.

More specifically, the end of the vortex grille is fixed with a support rod extending downward.

Preferably, the containment recirculation filter filter module further comprises two bases, two of the bottom walls The bottom ends are respectively fixed with a bottom plate, and the two bottom plates are respectively detachably connected to the two bases.

Specifically, the two ends of the base are provided with protruding studs, and the two ends of the bottom plate correspondingly open through holes for the studs to pass through. When the filter module is installed, the base is fixed into the pit, and the bus groove is placed on the base, so that the stud on the base passes through the through hole in the bottom plate, and then The nut is screwed onto the stud to fix the confluence groove in the pit, and the installation process is simple.

Preferably, the opening at both ends of the bus bar is provided with a flange portion extending outwardly relative to the top wall, the bottom wall and the side wall. The flange portion functions to be connected to the other of the junction grooves or the connection module.

Preferably, a plurality of outwardly projecting studs are disposed around each of the filter cartridge holes, and one end of the filter cartridge has a connecting portion attached to the sidewall, and the connecting portion is correspondingly provided for a plurality of through holes through which the studs pass.

Preferably, the filter cartridge is an inner and outer double layer filter structure. The arrangement of the filter cartridge as a double-layered screen structure facilitates the filtration efficiency of the unit length filter.

DRAWINGS

FIG. 1 is a schematic structural view of a filter module in the prior art.

2 is a perspective view of a containment recirculation filter module of the present invention.

Figure 3 is a side elevational view of the containment recirculation filter module of the present invention.

4 is a perspective view of a manifold in a containment filter filter module of the present invention.

Figure 5 is an exploded view of the filter cartridge in the containment filter filter module of the present invention.

Figure 6 is a perspective view of the base of the containment recirculation filter module of the present invention.

Figure 7 is a schematic illustration of a vortex barrier and a connector in a containment recirculation filter module of the present invention.

detailed description

DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings.

As shown in FIG. 2 and FIG. 3, the present invention provides a containment recirculation filter filter module 1 including a confluence channel 11, a plurality of filter cartridges 12, two anti-vortex grids 13, a plurality of connecting members 14, and two bases. 15.

As shown in FIG. 4, the bus groove 11 has a box structure with open ends and includes two opposite side walls 111. And the opposite top wall 112 and the bottom wall 113, the top wall 112 is connected between the upper ends of the two side walls 111, and the bottom wall 113 is connected between the lower ends of the two side walls 111. A flange portion 114 is formed at an opening of the two ends of the confluence groove 11 to extend outwardly from the top wall 112, the bottom wall 113 and the side wall 111. The flange portion 114 functions to connect with the other confluence grooves 11 or in the filter. The connection module 1 is connected, and the flange portion 114 is provided with a positioning card 115 for realizing connection.

Two rows of raised studs 112a are arranged at intervals on the top wall 112. Each row of studs 112a includes a plurality of positions. The positions of the two rows of studs 112a are respectively close to the two side walls 111, and the studs 112a are arranged in a substantially uniform direction. Parallel to the longitudinal direction of the side wall 111, the two rows of studs 112a are symmetrically disposed on the top wall 112. In this embodiment, the number of each row of studs 112a is four. A bottom plate 116 is fixed to each end of the bottom wall 113. The bottom plate 116 is located adjacent to the opening of the bus bar 11 and can abut against the flange portion 114. The two ends of the bottom plate 116 respectively protrude from the two side walls 111 and the bottom plate A through hole 116a is defined in each of the two ends of the 116.

The two side walls 111 are respectively provided with a plurality of filter cylinder holes 111a, and the two side walls 111 are symmetrically disposed, that is, the positions of the filter cylinder holes 111a on the two side walls 111 are in one-to-one correspondence. Preferably, the filter cartridge holes 111a are arranged in an array. Specifically, each of the side walls 111 has three rows and four columns of filter cartridge holes 111a, for a total of twelve. The shape of the cartridge bore 111a is hexagonal. Four outwardly projecting studs 111b are disposed around each of the filter cartridge holes 111a. Referring to FIG. 3, in order to increase the structural strength of the busbar 11, a plurality of crossbars 117 may be disposed between the two side walls 111. The two ends of the crossbar 117 are respectively fixed to the inner surfaces of the two side walls 111, thereby A connection relationship is formed between the side walls 111 to prevent the side wall 111 from being deformed by force.

Referring to FIG. 2 and FIG. 4 and FIG. 5, a plurality of filter cartridges 12 are mounted one by one in the filter cartridge holes 111a of the two side walls 111, so that the number of the filter cartridges 12 is 24 in this embodiment. The filter cartridge 12 has a hexagonal prism structure corresponding to the cartridge hole 111a, and has a square plate-like connecting portion 121 at one end thereof, and through holes 121a are formed at four corners of the connecting portion 121. When the filter cartridge 12 is installed, the position of the filter cartridge 12 is opposite to the position of the filter cartridge hole 111a on the side wall 111, and the connecting portion 121 is attached to the side wall 111, so that the four studs 111b around the filter cartridge hole 111a are respectively It passes through the four through holes 121a of the connecting portion 121, and then is screwed to the four studs 111b by four nuts, respectively, and the filter cartridge 12 is fixed to the side wall 111 when the nut is tightened. Repeat the above installation steps to complete the installation of all 24 filter cartridges 12.

In order to enhance the filtering effect under the premise that the length of the filter cartridge 12 is constant, the filter cartridge 12 is configured as a structure of an inner and outer double-layer filter in this embodiment. Specifically, the filter cartridge 12 includes a hexagonal prism shape The filter screen 122 and the inner screen 123 are disposed inside the outer screen 122 and the respective sides of the inner screen 123 are parallel to and spaced apart from the corresponding surfaces of the outer screen 122, so the inner screen 123 and the outer filter A six-sided annular section 124 is formed between the nets 122. Both ends of the inner screen 123 and the outer screen 122 are open, and the connecting portion 121 is formed on the outer side surface of the rear end of the outer screen 122 and extends outward so as not to affect the opening of the outer screen 122. The filter cartridge 12 further includes a front cover plate 125 and a rear cover plate 126, wherein the front cover plate 125 has an annular shape corresponding to the annular section 124, and the rear cover plate 126 has a hexagonal shape corresponding to the opening of the inner screen 123. The front cover 125 is fixed to the front end of the outer screen 122 and the front end of the inner screen 123 so as to close the opening at the end of the annular section 124. The rear cover 126 is fixed to the rear end of the inner screen 123 to close the opening at the rear end of the inner screen 123. The rear cover 126 does not shield the opening at the rear end of the annular section 124. After the filter cartridge 12 is mounted on the manifold 11, the annular section 124 can communicate with the internal space of the manifold 11 through the cartridge bore 111a. The filtered water enters the annular section 124 through the holes in the outer screen 122, passes through the outer screen 122 and the inner screen 123, and then flows into the confluence channel 11.

Referring to FIG. 6 and FIG. 4, the two ends of the top of the base 15 are provided with raised studs 151. The distance between the two studs 151 is the same as the distance between the two through holes 116a of the bottom plate 116. The function of the base 15 is The bustling groove 11 is supported to securely and firmly fix the bustling groove 11 to the ground in the pit. When the filter module 1 is installed, the two bases 15 are first fixed to the ground in the pit by welding or the like, and then the bus groove 11 is placed on the two bases 15 so that the studs 151 on the base 15 pass through the bottom plate 116. The through hole 116a is screwed onto the stud 151 by a nut, thereby fixing the confluence groove 11 in the pit, and the installation process is simple. As a more preferred arrangement, the through hole 116a of the bottom plate 116 can be arranged as an elongated hole, so that the stud 151 on the base 15 can slide in the through hole 116a, so that the position of the bus groove 11 can be finely adjusted. .

Referring to FIG. 7 and in conjunction with FIG. 2, the two vortex barriers 13 have a grid structure, and one end of the vortex grille 13 is provided with a row of through holes (not shown). The number of the through holes is four and the position can be One corresponding to the studs 112a on the top wall 112. The connecting member 14 is connected to the stud 112a on the top wall 112 and fixes the two anti-vortex grills 13 on the confluence slot 11, so that the number of the connecting members 14 in the embodiment is also four, and the connecting member 14 is a long strip-like structure, and through holes 141 are respectively formed at both ends thereof. After the bus bar 11 is installed in position, one ends of the two vortex grills 13 having through holes are respectively mounted on the top wall 112, so that the two rows of studs 112a pass through the two rows of through holes of the two vortex grills 13, and then The four connecting members 14 are pressed onto the two vortex grills 13 such that the two through holes 141 of each of the connecting members 14 are passed through by two corresponding positions in the two rows of studs 112a. Then, the nut is tightened to the stud 112a, and the vortex grill 13 can be fixed to the bus groove 11 through the connecting member 14. After the two vortex grills 13 are fixed, they extend toward the outside of the two side walls 111 and are respectively covered above the filter cartridges 12 on the corresponding two side walls 111. Since the anti-vortex grille 13 has only one end fixed, in order to prevent it from contacting the filter cartridge 12 downward, a downwardly extending support rod 16 is fixed at one end of its suspension, and the support rod 16 is supported on the bottom surface of the pit to prevent the anti-vortex grille 13 Falling down. In a specific implementation, the anti-vortex grid 13 is formed by intersecting two materials of longitudinal and transverse directions, wherein the longitudinal direction is a flat steel of 30 mm×5 mm, and the transverse direction is a twisted steel. The square size of the flat steel and the twisted steel is 100 mm × 30 mm.

The studs in this embodiment may be directly formed in the corresponding positions, or may be threaded into the existing studs after being punched in the corresponding positions.

Compared with the prior art, the present invention is provided with a filter cylinder hole 111a on both side walls 111 of the manifold 11 in the containment filter filter module 1 of the present invention, so that the bus groove 11 has a symmetrical structure and is easy to be formed. . A plurality of filter cartridges 12 are respectively disposed on the two side walls 111, so that the torque generated by the filter cartridges 12 on both sides of the confluence channel 11 cancel each other, so that the structure of the filter module 1 is stable, and no additional support assembly is needed to support the confluence channel 11. This makes the installation of the containment recirculation filter filter module 1 easier.

The above disclosure is only a preferred embodiment of the present invention, and its function is to facilitate understanding and implementation by those skilled in the art, and of course, it is not intended to limit the scope of the present invention. Equivalent variations are still within the scope of the invention.

Claims

A containment recirculation filter filter module, comprising: a confluence trough and a plurality of filter cartridges, wherein the confluence trough comprises two opposite side walls and opposite top and bottom walls, the top wall being connected to two Between the upper ends of the side walls, the bottom wall is connected between the lower ends of the two side walls, the two ends of the confluence groove are open; and the two side walls are respectively provided with a plurality of filter cylinder holes, and the plurality of The filter cartridges are mounted one by one correspondingly to the filter cartridge holes of the two side walls.
The containment recirculation filter filter module of claim 1 wherein said containment recirculation filter filter module further comprises a vortex grille in a lattice configuration, said vortex barrier being mounted to The top wall is covered above the filter cartridge.
The containment recirculation filter filter module according to claim 2, wherein the number of the anti-vortex grids is two, and one ends of the two anti-vortex grids are respectively fixed on the top wall and respectively An outer side of the two side walls extends, and the two anti-vortex grids respectively cover the filter cartridges on the corresponding two of the side walls.
The containment recirculation filter filter module of claim 3, wherein the containment recirculation filter filter module further comprises a plurality of connecting members, wherein the connecting members respectively have connecting through holes; Two rows of raised studs are arranged at intervals on the top wall, and one end of the anti-vortex grille is provided with a row of through holes; the two rows of the studs respectively pass through the two of the anti-vortex grilles And the two ends of the two rows of the studs respectively pass through the two connecting studs.
A containment recirculation filter module according to claim 3, wherein the end of the vortex grille is fixed with a support rod extending downward.
A containment recirculation filter filter module according to claim 1 wherein: said safety The full-shell recirculation filter filter module further includes two bases, and two ends of the bottom wall are respectively fixed with a bottom plate, and the two bottom plates are respectively detachably connected to the two bases.
The containment recirculation filter filter module according to claim 6, wherein both ends of the base are provided with raised studs, and two ends of the bottom plate are correspondingly opened for the studs to pass through. Through hole.
The containment recirculation filter filter module according to claim 1, wherein the opening at both ends of the confluence groove is provided with a flange portion extending outwardly relative to the top wall, the bottom wall and the side wall. .
The containment recirculation filter filter module of claim 1 , wherein each of the filter cartridge holes is provided with a plurality of outwardly projecting studs, one end of the filter cartridge having a fit a connecting portion on the side wall, the connecting portion correspondingly opening a plurality of through holes through which the studs pass through.
The containment recirculation filter module of claim 1 wherein said filter cartridge is an inner and outer double layer filter structure.