CN212299985U

CN212299985U - Shell-and-tube condenser for nuclear power station

Info

Publication number: CN212299985U
Application number: CN202020243998.9U
Authority: CN
Inventors: 聂成磊; 郎宏祥; 周鹏; 欧国勇; 李超联
Original assignee: China General Nuclear Power Corp; China Nuclear Power Engineering Co Ltd; CGN Power Co Ltd; Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Current assignee: China General Nuclear Power Corp; China Nuclear Power Engineering Co Ltd; CGN Power Co Ltd; Shenzhen China Guangdong Nuclear Engineering Design Co Ltd
Priority date: 2020-03-02
Filing date: 2020-03-02
Publication date: 2021-01-05
Anticipated expiration: 2030-03-02

Abstract

The utility model provides a nuclear power station shell and tube condenser, it includes the shell side barrel and installs the heat exchanger tube bank in the shell side barrel, wherein, installs the grid plate that is equipped with a plurality of grid strips in the shell side barrel, and grid strip buckle is in the same place and form the space between the grid strip, and the heat exchanger tube of heat exchanger tube bank passes the space between the grid strip and supports on the grid strip. Compared with the prior art, in the nuclear power station shell-and-tube condenser, gaps are formed among the grid bars of the grid plates, and the heat exchange tubes of the heat exchange tube bundles penetrate through the gaps among the grid bars and are supported on the grid bars, so that the shell side pressure drop can be obviously reduced, and the operation cost is reduced; the grid plates can guide the steam to longitudinally flow, the structure is compact, the steam distribution is more uniform, and the uniform distribution degree of a shell pass flow field of the condenser is improved.

Description

Shell-and-tube condenser for nuclear power station

Technical Field

The utility model belongs to the technical field of the nuclear power, more specifically say, the utility model relates to a nuclear power station shell-and-tube condenser.

Background

The condenser plays an important role in the technical field of nuclear power as a heat exchange device commonly used in a thermodynamic system, and can condense a vapor medium discharged from a process section into a liquid and release a large amount of latent heat of vaporization.

A shell-and-tube condenser is a widely used condenser formed by a shell and a tube bundle containing a number of heat exchange tubes through which cold and hot fluids exchange heat. Due to the characteristics of mature structure, strong adaptability, low production cost, small occupied area and the like, the shell-and-tube condenser plays an important role in a nuclear power system.

In the related technology, a plurality of arch-shaped baffle plates are arranged on the shell pass of some shell-and-tube condensers so as to increase the turbulence degree of the shell pass and improve the heat exchange coefficient of the condensers. However, the shell-side pressure drop of the shell-and-tube condenser also increases and cannot be adapted to the operating parameters. Other shell and tube type condensers still adopt the shell not have the reposition of redundant personnel structure of dividing the journey baffle, but because vapour density is little, volumetric flow is big, in order to guarantee that the circulation is smooth and easy and avoid the impact to the tube bank and cause the tube bank vibration, need not lay the pipe by a large scale above the equipment, cause the equipment diameter to increase, equipment cost increases.

In view of the above, it is necessary to provide a nuclear power plant shell-and-tube condenser with reduced shell-side pressure drop and low cost.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a: the defects of the prior art are overcome, and the nuclear power station shell-and-tube condenser which can reduce shell-side pressure drop and is low in cost is provided.

In order to achieve the purpose, the utility model provides a nuclear power station shell-and-tube condenser, including shell side barrel and the heat exchange tube bank of installing in shell side barrel, wherein, install the grid plate that is equipped with a plurality of grid strips in the shell side barrel, the grid strip buckle together and form the space between the grid strip, the heat exchange tube of heat exchange tube bank passes the space between the grid strip and supports on the grid strip.

As an improvement of the nuclear power station shell-and-tube condenser, the grid plate is fixedly installed in the top of the shell side cylinder body, and a notch is left between the bottom of the grid plate and the shell side cylinder body, wherein the grid plate is fan-shaped.

As an improvement of the nuclear power station shell-and-tube condenser, the top interval of the shell pass cylinder body is provided with a plurality of grid plates.

As an improvement of the nuclear power station shell-and-tube condenser, the grid plate is equipped with outer straight plate and outer arc board, and outer straight plate and outer arc board form fan-shaped frame, and a plurality of grid strip buckles are in the same place to compress tightly the grid strip from both sides through the clamp ring with outer arc board and outer straight plate welded respectively.

As an improvement of the nuclear power station shell-and-tube condenser, the clamp ring includes with the outer straight plate adaptation compress tightly the straight and with the arc that compresses tightly of outer arc board adaptation, compress tightly the straight and compress tightly the arc respectively with outer straight plate and outer arc board welding as an organic whole.

As the utility model discloses nuclear power station shell and tube condenser's an improvement, the bottom of shell side barrel is equipped with prevents the short circuit baffle, prevents that the short circuit baffle is equipped with the perforation, and the heat exchange tube passes the perforation on preventing the short circuit baffle, and steam makes progress the streaming under preventing blockking of short circuit baffle.

As an improvement of the nuclear power station shell-and-tube condenser, the shell side cylinder is provided with a steam inlet, a gas outlet and a condensate outlet, and the condensate outlet is positioned below the steam inlet in the height direction.

As an improvement of the nuclear power station shell-and-tube condenser, the shell side barrel is provided with an instrument connecting tube.

As an improvement of the nuclear power station shell-and-tube condenser, the shell pass cylinder is provided with a lifting lug.

As the utility model discloses nuclear power station shell and tube condenser's an improvement, be connected with pipe case on the shell side barrel, the one end connecting tube case flange of pipe case, the other end of pipe case passes through the tube sheet and separates with the shell side barrel.

Compared with the prior art, the utility model discloses nuclear power station shell and tube condenser has following advantage:

1. gaps are formed among the grid bars of the grid plate, and the heat exchange tubes of the heat exchange tube bundle penetrate through the gaps among the grid bars and are supported on the grid bars, so that the shell side pressure drop can be obviously reduced, and the operation cost is reduced;

2. the grid plates guide the steam to longitudinally flow, the structure is compact, the distribution of the steam is more uniform, the uniform distribution degree of a shell pass flow field of the condenser is improved, and the heat exchange efficiency of the uniformly distributed flow field can be improved by 20% by theoretical calculation;

3. the grid plates support all the heat exchange tube bundles in a triangular tube distribution mode, and meanwhile, the main flow direction of a medium is longitudinal flow, so that the flow-induced vibration risk is greatly reduced;

4. the lower area of the grid plate is not provided with pipes, and condensate is collected and discharged smoothly;

5. the short-circuit prevention baffle is additionally arranged at the inlet of the shell pass cylinder, so that the steam can be prevented from being directly discharged under the flow guide effect of the shell pass cylinder, and the condition that part of heat exchange tubes do not participate in heat exchange is avoided.

Drawings

The nuclear power station shell-and-tube condenser and the beneficial technical effects thereof according to the present invention will be described in detail with reference to the accompanying drawings and the specific embodiments.

Fig. 1 is the utility model discloses nuclear power station shell and tube condenser's cross-sectional view.

Fig. 2 is the utility model discloses the structure schematic diagram of grid plate among nuclear power station shell-and-tube condenser.

Fig. 3 is a schematic cross-sectional view of the grid plate of fig. 2 along line a-a.

Figure 4 is the utility model discloses the structure schematic diagram of compression ring in nuclear power station shell-and-tube condenser.

Fig. 5 is the structure schematic diagram of the grid bars in the shell-and-tube condenser of the nuclear power station of the utility model.

Figure 6 is the utility model discloses prevent short circuit baffle's among nuclear power station shell and tube condenser structural schematic.

Detailed Description

In order to make the objects, technical solutions and technical effects of the present invention clearer, the present invention will be further described in detail with reference to the following embodiments. It should be understood that the detailed description and specific examples, while indicating the present invention, are given by way of illustration and not limitation.

Referring to fig. 1 to 6, the utility model provides a nuclear power station shell-and-tube condenser, including shell side barrel 10 and the heat exchanger tube bundle 20 installed in shell side barrel 10, wherein, install the grid plate 30 that is equipped with a plurality of grid bars 300 in the shell side barrel 10, grid bars 300 buckle together and form the space between grid bars 300, the heat exchange tube of heat exchanger tube bundle 20 passes the space between grid bars 300 and supports on grid bars 300.

Referring to fig. 1, the grid plate 30 is fan-shaped, and a gap is left between the grid plate 30 and the bottom of the shell-side cylinder 10. According to the amount of the condensate liquid generated under the working condition of the equipment, the size of the notch below the grid plate 30 can be adjusted, the on-way resistance loss in the condensate liquid flowing process is reduced, the generation of accumulated liquid at the lower part is avoided, the thermal resistance is further reduced, and the integral condensation effect of the condenser is improved. In the embodiment shown in fig. 1, a plurality of grid plates 30 are spaced at the top of the shell-side cylinder 10.

Referring to fig. 2 to 5, the grid plate 30 is provided with an outer straight plate 302 and an outer arc plate 304, the outer straight plate 302 and the outer arc plate 304 together form a fan-shaped frame, the plurality of grid bars 300 are fastened together as shown in the figure, and the grid bars 300 are compressed from both sides by compression rings 40 respectively welded to the outer straight plate 302 and the outer arc plate 304.

Referring to fig. 4 in particular, the clamp ring 40 includes a clamp bar 402 adapted to the outer straight plate 302 and a clamp bar 404 adapted to the outer arc plate 304, and the clamp bar 402 and the clamp bar 404 are welded to the outer straight plate 302 and the outer arc plate 304 respectively.

Referring to fig. 6, the bottom of the shell-side cylinder 10 is provided with a short-circuit prevention baffle 50, the short-circuit prevention baffle 50 is provided with a through hole 500, the heat exchange tube penetrates through the through hole 500 on the short-circuit prevention baffle 50, the steam flows upwards and around under the blockage of the short-circuit prevention baffle 50, so that the steam is prevented from being directly discharged under the flow guiding action of the shell-side cylinder 10, the situation that part of the heat exchange tube does not participate in heat exchange is avoided, and the flow paths of the steam and the condensate are respectively shown by solid arrows and dotted arrows in fig. 1.

With continued reference to fig. 1, the shell-side cylinder 10 has a vapor inlet 100, a gas outlet 102, and a condensate outlet 104, and the condensate outlet 104 is located below the vapor inlet 100 in the height direction. That is, in the embodiment shown in FIG. 1, the entire apparatus is arranged in a side-to-side configuration with the condensate outlet 104 at the lower end to drain condensate in time under the influence of gravity, avoiding the formation of a large thermal resistance.

Referring to fig. 1, a meter connecting pipe 106 and a lifting lug 108 are arranged on the shell-side cylinder 10, the shell-side cylinder 10 is connected with a pipe box 60, one end of the pipe box 60 is connected with a pipe box flange 70, and the other end of the pipe box 60 is separated from the shell-side cylinder 10 by a pipe plate 80.

1. gaps are formed among the grid bars 300 of the grid plate 30, and the heat exchange tubes of the heat exchange tube bundle 20 pass through the gaps among the grid bars 300 and are supported on the grid bars 300, so that the shell side pressure drop can be remarkably reduced, and the operation cost can be reduced;

2. the grid plates 30 can guide the steam to flow longitudinally, the structure is compact, the distribution of the steam is more uniform, the uniform distribution degree of a shell pass flow field of the condenser is improved, and the heat exchange efficiency of the uniformly distributed flow field can be improved by 20% by theoretical calculation;

3. the grid plates 30 support all the heat exchange tube bundles 20 in a triangular tube distribution mode, and meanwhile, the main flow direction of the medium is longitudinal flow, so that the flow-induced vibration risk is greatly reduced;

4. the lower area of the grid plate 30 is not provided with pipes, and condensate is collected and discharged smoothly;

5. the short-circuit prevention baffle 50 is additionally arranged at the inlet of the shell-side cylinder 10, so that the steam can be prevented from being directly discharged under the flow guide effect of the shell-side cylinder 10, and the condition that part of heat exchange tubes do not participate in heat exchange is avoided.

According to the above principle, the present invention can also make appropriate changes and modifications to the above embodiments. Therefore, the present invention is not limited to the specific embodiments disclosed and described above, and some modifications and changes to the present invention should fall within the protection scope of the claims of the present invention. Furthermore, although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. The utility model provides a nuclear power station shell and tube condenser, includes shell side barrel and installs the heat exchange tube bank in the shell side barrel, its characterized in that, install the grid plate that is equipped with a plurality of grids in the shell side barrel, the grid buckle is in the same place and forms the space between the grid, the heat exchange tube of heat exchange tube bank passes the space between the grid and supports on the grid.

2. The nuclear power plant shell and tube condenser as recited in claim 1, wherein the grid plate is fixedly mounted to the top of the shell-side cylinder, the grid plate is fan-shaped and a gap is left between the grid plate and the bottom of the shell-side cylinder.

3. The nuclear power plant shell and tube condenser as recited in claim 1, wherein a plurality of grid plates are spaced at a top of the shell-side barrel.

4. The nuclear power plant shell and tube condenser as recited in claim 1, wherein the grid plates are provided with outer straight plates and outer arc plates, the outer straight plates and the outer arc plates form a fan-shaped frame, the plurality of grid bars are snapped together and pressed from both sides by clamp rings welded to the outer arc plates and the outer straight plates, respectively.

5. The nuclear power plant shell and tube condenser as recited in claim 4, wherein the hold-down ring includes hold-down bars that fit over the outer straight plates and hold-down arcs that fit over the outer arcs, the hold-down bars and hold-down arcs being welded together with the outer straight plates and the outer arcs, respectively.

6. The nuclear power plant shell and tube condenser as recited in claim 1, wherein the bottom of the shell-side cylinder is provided with a short-circuit prevention baffle, the short-circuit prevention baffle is provided with perforations, the heat exchange tubes pass through the perforations on the short-circuit prevention baffle, and steam flows upwards under the blockage of the short-circuit prevention baffle.

7. The nuclear power plant shell and tube condenser as recited in claim 1 wherein the shell-side barrel is provided with a vapor inlet, a gas outlet, and a condensate outlet, the condensate outlet being located below the vapor inlet in the elevation direction.

8. The nuclear power plant shell and tube condenser as recited in claim 1, wherein the shell-side barrel is provided with instrumentation connections.

9. The nuclear power plant shell and tube condenser as recited in claim 1 wherein the shell-side barrel is provided with lifting lugs.

10. A nuclear power plant shell and tube condenser as claimed in any one of claims 1 to 9, characterized in that a tube box is connected to the shell-side cylinder, one end of the tube box is connected to a tube box flange, and the other end of the tube box is separated from the shell-side cylinder by a tube plate.