CN215924472U

CN215924472U - Desalting bed for nuclear power station

Info

Publication number: CN215924472U
Application number: CN202121397200.7U
Authority: CN
Inventors: 罗卫华; 林沛; 刘洋
Original assignee: China General Nuclear Power Corp; CGN Power Co Ltd; Nuclear Power Institute of China; Lingao Nuclear Power Co Ltd
Current assignee: China General Nuclear Power Corp; CGN Power Co Ltd; Nuclear Power Institute of China; Lingao Nuclear Power Co Ltd
Priority date: 2021-06-22
Filing date: 2021-06-22
Publication date: 2022-03-01
Anticipated expiration: 2031-06-22

Abstract

The utility model belongs to the technical field of nuclear auxiliary systems, and particularly relates to a desalting bed for a nuclear power station. The desalting bed of the nuclear power station comprises an exhaust pipe, a water inlet pipe, a filling pipe, a discharge pipe, a cylinder body provided with an installation space for installing resin, and an upper end enclosure and a lower end enclosure which are arranged at two opposite ends of the cylinder body; the resin is installed in the installation space; the upper end enclosure is provided with an air outlet communicated with the mounting space, and the air outlet pipe is communicated with the air outlet; the barrel is provided with a water inlet and a filling opening which are communicated with the installation space, the water inlet pipe is communicated with the water inlet, and the filling pipe is communicated with the filling opening; the discharge pipe is communicated with the installation space. According to the utility model, the filling work of the resin can be completed without opening the upper end enclosure of the desalting bed of the nuclear power station, namely, the dismounting and mounting of the scaffold are not needed, the overhauling work of the desalting bed of the nuclear power station is simplified, the overhauling cost of the desalting bed of the nuclear power station is reduced, and the construction period of resin replacement is shortened.

Description

Desalting bed for nuclear power station

Technical Field

The utility model belongs to the technical field of nuclear auxiliary systems, and particularly relates to a desalting bed for a nuclear power station.

Background

The stator cooling water system of the large-scale generator of the nuclear power station is generally provided with a desalting bed, the desalting bed is an ion exchanger filled with H/OH type mixed resin, the ion exchanger can carry out bypass treatment on stator cooling water to remove impurity ions in the cooling water, so that the conductivity, copper ions and the like of the cooling water are controlled within the range of water quality indexes, and the cooling water treated by the desalting bed can be recycled or reach the discharge standard.

In the prior art, a desalination bed usually comprises an upper end enclosure, a lower end enclosure and a cylinder body, wherein the upper end enclosure needs to be detached from the cylinder body before resin is filled into the cylinder body, and the upper end enclosure is reloaded onto the cylinder body after filling is finished. However, since the barrel is high and the upper end enclosure is heavy, the nuclear power plant staff often need to set up the scaffold to complete the filling work of the resin, and after the filling is finished, the scaffold needs to be disassembled. Therefore, the salt removing bed of the nuclear power station in the prior art has the problems of high maintenance cost, inconvenient maintenance and the like.

Disclosure of Invention

The utility model provides a desalting bed for a nuclear power station, aiming at the problems of high overhauling cost, inconvenience in overhauling and the like of the desalting bed for the nuclear power station in the prior art.

In view of the above technical problems, an embodiment of the present invention provides a nuclear power station desalination bed, which includes an exhaust pipe, a water inlet pipe, a filling pipe, a discharge pipe, a cylinder provided with an installation space for installing resin, and an upper end enclosure and a lower end enclosure installed at two opposite ends of the cylinder; the resin is installed in the installation space; the upper end enclosure is provided with an air outlet communicated with the mounting space, and the air outlet pipe is communicated with the air outlet; the barrel is provided with a water inlet and a filling opening which are communicated with the installation space, the water inlet pipe is communicated with the water inlet, and the filling pipe is communicated with the filling opening; the discharge pipe is communicated with the installation space.

Optionally, the nuclear power plant desalination bed further comprises a blind flange and an isolation valve installed in the filling pipe; the blind flange is arranged at one end of the filling pipe, which is far away from the filling opening.

Optionally, a water outlet is further formed in the lower end enclosure, the nuclear power station desalination bed further comprises a filter arranged between the lower end enclosure and the barrel, and the discharge pipe is communicated with the installation space through the filter.

Optionally, the filter comprises an inner flange, an outer flange and a filter screen mounted between the inner flange and the outer flange; the outer flange is installed between the barrel and the lower end enclosure, the inner flange is provided with a discharge port communicated with the discharge pipe, and the discharge pipe is communicated with the installation space through the discharge port.

Optionally, the filter screen is a johnson filter screen.

Optionally, a through hole is further formed in the lower end enclosure, and the discharge pipe penetrates through the through hole and is communicated with the installation space.

Optionally, an observation window is further arranged on the cylinder body.

Optionally, the salt removing bed for the nuclear power plant further comprises a plurality of lifting lugs mounted on the upper head.

Optionally, the salt removing bed for the nuclear power station further comprises an upper mounting flange and a lower mounting flange, wherein the upper end socket is mounted at the upper end of the cylinder body through the upper mounting flange, and the lower end socket is mounted at the lower end of the cylinder body through the lower mounting flange.

Optionally, the salt removing bed for the nuclear power plant further comprises a support frame for supporting the exhaust pipe, one end of the support frame is connected with the upper mounting flange, and the other end of the support pipe is connected with the exhaust pipe.

In the present invention, resin is installed in an installation space of the cylinder; the upper end enclosure is provided with an air outlet communicated with the mounting space, and the air outlet pipe is communicated with the air outlet; the barrel is provided with a water inlet and a filling opening which are communicated with the installation space, the water inlet pipe is communicated with the water inlet, and the filling pipe is communicated with the filling opening; the discharge pipe is communicated with the installation space. According to the utility model, the liquid to be treated in the nuclear power station can enter the installation space through the water inlet pipe and fully contact with the resin in the installation space, and impurity ions in the liquid to be treated in the nuclear power station and active groups in the resin perform ion exchange reaction, so that impurity ions are removed, non-impurity ions are released, and deionized water meeting chemical indexes is obtained. The resin in the installation space can be discharged through the discharge pipe, and the discharge pipe is communicated with the bottom of the cylinder body, so that the resin in the cylinder body can be discharged more completely. In addition, the workers of the nuclear power plant can fill fresh resin into the barrel body under the assistance of the water flow of the demineralized water by installing a funnel at one end of the filling pipe, which is far away from the filling port, externally connecting the funnel with the demineralized water; can also be through the filling pipe is kept away from the one end installation resin sprayer of filling the mouth, external demineralized water again, lean on the resin sprayer past spray fresh resin in the installation space to need not to open the loading work of resin can be accomplished to the upper cover, also need not dismouting scaffold frame, simplified the maintenance work of this nuclear power station desalination bed, reduced the maintenance cost of nuclear power station desalination bed, shortened the time limit for a project that the resin was changed.

Drawings

The utility model is further illustrated with reference to the following figures and examples.

FIG. 1 is a schematic structural diagram of a desalination bed of a nuclear power plant according to an embodiment of the present invention;

FIG. 2 is a front view of a filter of a desalination bed of a nuclear power plant according to an embodiment of the present invention;

fig. 3 is a cross-sectional view of a filter of a desalination bed of a nuclear power plant according to an embodiment of the present invention.

The reference numerals in the specification are as follows:

11. an exhaust pipe; 12. a water inlet pipe; 13. filling a tube; 14. a discharge pipe; 15. a barrel; 151. an observation window; 16. an upper end enclosure; 161. lifting lugs; 17. a lower end enclosure; 171. a water outlet; 18. a blind flange; 19. an isolation valve; 21. a filter; 211. an inner flange; 2111. a discharge port; 212. an outer flange; 213. a filter screen; 22. installing a flange; 23. installing a flange; 24. a support frame.

Detailed Description

In order to make the technical problems, technical solutions and advantageous effects solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the utility model and are not intended to limit the utility model.

It is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", "middle", and the like, indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are only for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, should not be construed as limiting the present invention.

As shown in fig. 1, a nuclear power station desalination bed provided by an embodiment of the present invention includes an exhaust pipe 11, a water inlet pipe 12, a filling pipe 13, a discharge pipe 14, a cylinder 15 provided with an installation space for installing resin, and an upper head 16 and a lower head 17 installed at opposite ends of the cylinder 15; the resin is installed in the installation space; an exhaust port communicated with the installation space is formed in the upper end enclosure 16, and the exhaust pipe 11 is communicated with the exhaust port (communicated in a flange installation mode); the cylinder body 15 is provided with a water inlet and a filling opening which are communicated with the installation space, the water inlet pipe 12 is communicated with the water inlet (communicated in a flange installation mode), and the filling pipe 13 is communicated with the filling opening (communicated in a flange installation mode); the discharge pipe 14 communicates (communicates by way of flange mounting) with the installation space. It can be understood that the resin in the installation space can perform an ion exchange reaction with impurity ions in the liquid to be treated in the nuclear power plant, so that the conductivity, copper ions and the like of the cooling water treated by the resin reach the range of water quality indexes. The liquid to be treated in the nuclear power plant includes, but is not limited to, stator cooling water. Further, the upper end enclosure 16 is hermetically installed at the upper end of the cylinder body 15, the lower end enclosure 17 is hermetically installed at the lower end of the cylinder body 17, and the water inlet is located between the air outlet and the inlet of the discharge pipe 14. Specifically, the exhaust pipe 14 needs to be opened, and the inlet pipe 12 can fill the installation space with the nuclear power plant treatment fluid.

Preferably, the salt removing bed for the nuclear power plant further comprises an upper mounting flange 22 and a lower mounting flange 23, the upper end socket 16 is mounted at the upper end of the cylinder 15 through the upper mounting flange 22, and the lower end socket 17 is mounted at the lower end of the cylinder 15 through the lower mounting flange 23. It will be appreciated that the upper mounting flange 22 includes a first mounting portion mounted to the head 16 and a second mounting portion mounted to the barrel 15; the upper end enclosure 16 is mounted at the upper end of the cylinder 15 through the first mounting part and the second mounting part (the first mounting part and the second mounting part can be connected through bolts); the lower mounting flange 23 comprises a third mounting part mounted on the lower end enclosure 17 and a fourth mounting part mounted on the cylinder 15; the low head 17 passes through the third installation department and the fourth installation department are installed the lower extreme of barrel 15 (the third installation department and the fourth installation department can pass through bolted connection). In the utility model, the desalting bed of the nuclear power station has a simple structure and is convenient to install.

In the present invention, resin is installed in the installation space of the cylinder 15; an exhaust port communicated with the installation space is formed in the upper end enclosure 16, and the exhaust pipe 11 is communicated with the exhaust port; the barrel body 15 is provided with a water inlet and a filling opening which are communicated with the installation space, the water inlet pipe 12 is communicated with the water inlet, and the filling pipe 13 is communicated with the filling opening; the drain pipe 14 communicates with the installation space. The liquid to be treated in the nuclear power station can enter the installation space through the water inlet pipe 12 and fully contact with the resin in the installation space, and impurity ions in the liquid to be treated in the nuclear power station and active groups in the resin are subjected to ion exchange reaction, so that impurity ions are removed, non-impurity ions are released, and the deionized water meeting chemical indexes is obtained. The resin in the installation space can be discharged through the discharge pipe 14, and the discharge pipe 14 communicates with the bottom of the cylinder 15, which can discharge the resin in the cylinder 15 more thoroughly. In addition, the nuclear power plant staff can fill fresh resin into the barrel 15 under the assistance of the flow of the demineralized water by installing a funnel at one end of the filling pipe 13, which is far away from the filling port, and then externally connecting the funnel with the demineralized water; can also be through filling pipe 13 is kept away from the one end installation resin sprayer of filling the mouth, external demineralized water again, lean on the resin sprayer toward spray fresh resin in the installation space, thereby need not to open the work of filling of resin can be accomplished to upper cover 16, also need not dismouting scaffold frame, has simplified the maintenance work of this nuclear power station desalination bed, has reduced the maintenance cost of nuclear power station desalination bed, has shortened the time limit for a project that the resin was changed.

In one embodiment, as shown in FIG. 1, the nuclear power plant desalination bed further comprises a blind flange 18 and an isolation valve 19 mounted (e.g., bolted) in the fill pipe 13; the blind flange 18 is mounted (e.g., bolted) to the end of the filler pipe 13 remote from the filler opening. It will be appreciated that the blind flange 18 and the isolation valve 19 serve to double seal the filler pipe 13 and prevent foreign materials and air from the external environment from entering the barrel 15 through the filler pipe 13, thereby improving the cleanliness of the installation space, extending the service life of the resin in the installation space and reducing the operating cost of the nuclear power plant.

In an embodiment, as shown in fig. 1, the lower head 17 is further provided with a water outlet 171, the nuclear power plant desalination bed further includes a filter 21 installed (by means of bolts or the like) between the lower head 17 and the cylinder 15, and the discharge pipe 14 communicates with the installation space through the filter 21. It will be appreciated that the filter 21 allows the nuclear power plant process fluid to pass through but not the resin, so that the filter 21 prevents the resin in the barrel 15 from being discharged from the water outlet 171, thereby preventing the nuclear power plant desalination bed from being disabled. In addition, the filter 21 can also play a role of supporting the resin, and the discharge pipe 14 is communicated with the installation space through the filter 21, that is, the discharge pipe 21 is communicated with the bottom of the resin, so that the resin in the installation space can be discharged cleanly when the resin is replaced or the equipment is overhauled.

In one embodiment, as shown in fig. 2 and 3, the filter 21 includes an inner flange 211, an outer flange 212, and a filter mesh 213 installed between the inner flange 211 and the outer flange 212; the outer flange 212 is installed between the cylinder 15 and the lower end enclosure 17, a discharge port 2111 communicated with the discharge pipe 14 is formed in the lower end enclosure 17, and the discharge pipe 14 is communicated with the installation space through the discharge port 2111. Preferably, the filter screen 213 is a johnson filter screen; the johnson screen is a slotted screen composed of a plurality of wedge wires distributed in parallel (specifically, one end of the wedge wire is connected to the inner wall of the outer flange 212 and the other end of the wedge wire is connected to the outer wall of the inner flange 211), and the size of the resin in the cylinder 15 is larger than the slot width of the johnson screen, so that the resin is not liable to leak to the downstream system through the water outlet 171; in addition, the surface of the Johnson filter screen is smooth, the friction between the resin and the Johnson filter screen is reduced, and the service life of the resin is prolonged. It can be understood that the resin in the installation space is installed in the barrel 15 through the filter screen 213, and the filter screen 213 is located at the lower end of the resin, so that the discharge pipe 14 is convenient to drain the resin in the barrel 15, and the desalination bed for the nuclear power plant has a simple structure and is convenient to install.

Further, be equipped with the strengthening rib on the filter screen 213, because the filter screen 213 need bear the gravity of resin, the setting of strengthening rib can avoid the filter screen 213 warp and makes the gap grow of filter screen 213 makes the filtering capability of filter screen 213 is invalid.

In one embodiment, as shown in fig. 1, a through hole is further formed in the lower end enclosure 17, and the discharge pipe 14 passes through the through hole to communicate with the installation space. It is understood that the drain pipe 14 communicates with the installation space from below, thereby facilitating the drain pipe 14 to drain the resin in the cylinder 15.

In one embodiment, as shown in fig. 1, the cylinder 15 is further provided with an observation window 151. Understandably, the condition of the resin in the installation space can be observed through the observation window 151 by workers of the nuclear power plant, so that the workers of the nuclear power plant can replace the resin in time, and the problem of insufficient treatment of the treatment liquid of the nuclear power plant caused by the failed resin is avoided.

In one embodiment, as shown in fig. 1, the nuclear power plant desalination bed further includes a plurality of lifting lugs 161 mounted on the upper head 16. It is understood that the lifting lug 161 may be provided in a plurality, for example, 2, 4, etc. according to actual requirements. The lifting lug 161 can hoist the desalting bed of the nuclear power station, so that the desalting bed of the nuclear power station can be conveniently installed and overhauled.

In an embodiment, as shown in fig. 1, the desalination bed of the nuclear power plant further includes a support frame 24 for supporting the exhaust pipe 11, one end of the support frame 24 is connected to the upper mounting flange 22, and the other end of the support frame is connected to the exhaust pipe 11. Understandably, because the exhaust pipe 11 is communicated with the upper end enclosure 16, the stability of the exhaust pipe is low, and the support frame 24 can play a role in stabilizing the exhaust pipe 11, so that the stability of the desalination bed of the nuclear power station is improved.

The above description is only an example of the desalination bed of the nuclear power plant, and is not intended to limit the present invention, and any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A nuclear power station desalination bed is characterized by comprising an exhaust pipe, a water inlet pipe, a filling pipe, a discharge pipe, a cylinder body provided with an installation space for installing resin, and an upper seal head and a lower seal head which are arranged at two opposite ends of the cylinder body; the upper end enclosure is provided with an air outlet communicated with the mounting space, and the air outlet pipe is communicated with the air outlet; the barrel is provided with a water inlet and a filling opening which are communicated with the installation space, the water inlet pipe is communicated with the water inlet, and the filling pipe is communicated with the filling opening; the discharge pipe is communicated with the installation space.

2. The nuclear power plant desalination bed of claim 1, further comprising a blind flange and an isolation valve mounted in the fill pipe; the blind flange is arranged at one end of the filling pipe, which is far away from the filling opening.

3. The nuclear power plant desalination bed of claim 1, wherein the lower head is further provided with a water outlet, the nuclear power plant desalination bed further comprises a filter arranged between the lower head and the barrel, and the discharge pipe is communicated with the installation space through the filter.

4. The nuclear power plant salt rejection bed of claim 3, wherein the filter comprises an inner flange, an outer flange, and a filter screen mounted between the inner flange and the outer flange; the outer flange is installed between the barrel and the lower end enclosure, the inner flange is provided with a discharge port communicated with the discharge pipe, and the discharge pipe is communicated with the installation space through the discharge port.

5. The nuclear power plant desalination bed of claim 4 wherein the filter screen is a Johnson filter screen.

6. The nuclear power plant desalination bed of claim 1, wherein the lower head is further provided with a through hole, and the discharge pipe passes through the through hole and is communicated with the installation space.

7. The nuclear power plant desalination bed of claim 1 wherein the barrel is further provided with an observation window.

8. The nuclear power plant desalination bed of claim 1, further comprising a plurality of lifting lugs mounted on the header.

9. The nuclear power plant desalination bed of claim 1, further comprising an upper mounting flange and a lower mounting flange, wherein the upper head is mounted at the upper end of the cylinder through the upper mounting flange, and the lower head is mounted at the lower end of the cylinder through the lower mounting flange.

10. The nuclear power plant desalination bed of claim 9, further comprising a support frame for supporting the exhaust pipe, wherein one end of the support frame is connected to the upper mounting flange, and the other end of the support frame is connected to the exhaust pipe.