CN213995376U - Steam-water separation unit for steam-water separation reheater - Google Patents
Steam-water separation unit for steam-water separation reheater Download PDFInfo
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- CN213995376U CN213995376U CN202022255324.3U CN202022255324U CN213995376U CN 213995376 U CN213995376 U CN 213995376U CN 202022255324 U CN202022255324 U CN 202022255324U CN 213995376 U CN213995376 U CN 213995376U
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Abstract
The utility model aims to disclose a steam-water separation unit for steam-water separation reheater, it includes two at least Y shapes symmetry setting separation assemblies, and separation assembly comprises frame subassembly and wave plate subassembly, the wave plate subassembly sets up in the frame subassembly, the frame subassembly includes top support, import gas equalization hole board, bottom support and drain trap, the drain trap sets up in the lower part of bottom support; compared with the prior art, separation assembly adopts the Y shape structure to arrange, makes and to arrange more separation areas in the effectual space of catch water re-heater (MSR), has improved the catch water ability of catch water re-heater (MSR), and the wave form board adopts the side to compress tightly, has guaranteed promptly to compress tightly the effect, has practiced thrift the steam circulation space again, and the wave form board is made for stainless steel material, effectively reduces the corrosion products in the return circuit, has improved life, and separation efficiency is high, and the pressure drop resistance is low, and comprehensive properties is good, realizes the utility model aims at.
Description
Technical Field
The utility model relates to a water separator unit, in particular to water separator unit of conventional island water separator reheater of pressurized water reactor nuclear power station.
Background
In the pressurized water reactor nuclear power station, after saturated steam expands in a steam turbine to work, the steam pressure and the temperature are gradually reduced, when the saturated steam leaves a high-pressure cylinder, the steam humidity reaches about 20 percent, if no measures are taken, the saturated steam is directly sent to a low-pressure cylinder to work, the steam with overhigh humidity can seriously corrode a last-stage blade of the low-pressure cylinder of the steam turbine, the circulating heat efficiency of the low-pressure cylinder is greatly reduced, the service life of the steam turbine is seriously shortened, and meanwhile, the moisture loss is increased. In order to improve the working conditions of the low-pressure cylinders, a Moisture Separator Reheater (MSR) is provided between the high-pressure and low-pressure cylinders.
The conventional island moisture separator reheater comprises a moisture separator and a steam reheater. The steam-water separator consists of a plurality of groups of steam-water separation units. The core component of the steam-water separation unit is a corrugated plate component. The wet steam from the high pressure cylinder makes a curvilinear motion while passing through the corrugated plate assembly, and water droplets in the steam are separated out under the action of centrifugal force, inertial force and adhesion force. And the steam separated from the steam-water separation unit enters a steam reheater to be reheated so as to obtain dry steam meeting the requirement, and the dry steam enters a low-pressure cylinder to do work and generate power. The performance of the steam-water separation unit directly influences the overall effect of a steam-water separation reheater (MSR), and has important influence on the heat rate of a power plant.
The Moisture Separator Reheater (MSR) has high requirements on both the separation performance and the pressure drop of the moisture separation unit. If the structural design of the separation unit is unreasonable, the steam-water separation efficiency is reduced, or the pressure drop is increased, so that the overall efficiency of a steam-water separation reheater (MSR) and the service life safety of the steam turbine are directly influenced.
Therefore, a steam-water separation unit for a steam-water separator reheater is particularly needed to solve the existing problems.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a steam-water separation unit for catch water reheater, to prior art's not enough, when satisfying nuclear power station steam generator design requirement, improve separation efficiency, reduce the steam resistance, improved the area of separation window and then improved catch water's ability in effectual catch water reheater (MSR) space.
The utility model provides a technical problem can adopt following technical scheme to realize:
the steam-water separation unit for the steam-water separation reheater is characterized by comprising at least two Y-shaped symmetrically-arranged separation assemblies, wherein each separation assembly is composed of a frame assembly and a corrugated plate assembly, the corrugated plate assemblies are arranged in the frame assemblies, each frame assembly comprises a top support, an inlet gas equalizing hole plate, a bottom support and a drainage groove, and the drainage groove is formed in the lower portion of the bottom support.
In an embodiment of the present invention, the air holes arranged in a regular triangle are disposed on the inlet air equalization hole plate.
In one embodiment of the present invention, a steam outlet weir plate is provided on the bottom support.
In one embodiment of the present invention, the lower part of the drain tank is provided with a rectangular opening.
In one embodiment of the present invention, the corrugated plate assembly comprises a corrugated plate and a water retaining hook welded on the corrugated plate, and a positioning block is disposed between the corrugated plates.
In an embodiment of the present invention, the corrugated plate assembly is disposed in the frame assembly through a tightening device, the tightening device includes a pressing plate and a set screw nut, and the pressing plate is fixed at two ends of the separating assembly through the set screw nut.
The utility model discloses a moisture separation unit for moisture separator reheater, compared with the prior art, the separator assembly adopts Y shape structural arrangement, makes can arrange more isolated area in Moisture Separator Reheater (MSR) effectual space, has improved the moisture separation ability of Moisture Separator Reheater (MSR), the wave plate adopts the side to compress tightly, has guaranteed promptly to compress tightly the effect, has practiced thrift the steam circulation space again, the wave plate is made for stainless steel material, effectively reduces the corrosion products in the return circuit, and has improved life, and separation efficiency is high, and pressure drop resistance is low, and comprehensive properties is good, realizes the utility model aims at.
The features of the present invention will be apparent from the accompanying drawings and from the detailed description of the preferred embodiments which follows.
Drawings
FIG. 1 is a schematic structural view of a steam-water separation unit for a steam-water separator reheater according to the present invention;
fig. 2 is a schematic cross-sectional view a-a of fig. 1 according to the present invention;
fig. 3 is a schematic diagram of the result of the steam-water separation unit in the thermal steam-water separation test of the present invention.
Detailed Description
In order to make the technical means, creation features, achievement purposes and functions of the present invention easy to understand and understand, the present invention is further explained by combining with the specific drawings.
Examples
As shown in fig. 1 to 3, the utility model discloses a steam-water separation unit for steam-water separation reheater, it includes that two Y shape symmetries set up the separable set, the separable set comprises frame set and wave plate subassembly, wave plate subassembly sets up in the frame set, the frame set includes top support 1, import gas equalization hole board 2, bottom sprag 4 and hydrophobic groove 5, and hydrophobic groove 5 sets up the lower part at bottom sprag 4.
In the embodiment, the inlet gas-homogenizing hole plate 2 is provided with holes which are arranged in a regular triangle and have the diameter of 12.7 mm. The inlet gas-equalizing hole plate 2 plays a role in uniformly distributing wet steam entering the separation unit, and prevents local air flow from being too large to influence the overall separation efficiency.
In this embodiment, the bottom support 4 mainly plays a role of supporting and fixing the corrugated plate assembly, and timely discharges water separated from steam into the water drainage tank 5 at the lower part. The steam outlet weir plate 3 is arranged on the bottom support 4, so that the steam can be further separated from the steam, such as secondary carrying, and the water discharged from the separator can be prevented from being directly taken out of the separation unit by the steam.
In this embodiment, the lower part of the water drainage groove 5 is provided with a rectangular opening, so that the separated water in the steam can be timely removed, and the secondary carrying of the steam caused by the accumulation of the drainage is avoided. The steam separated from the two separation assemblies is collected in the middle of the separation unit and enters a reheater to be heated into superheated steam.
In this embodiment, the corrugated plate assembly comprises a corrugated plate 6 and a water retaining hook welded on the corrugated plate 6, and the corrugated plate 6 and the water retaining hook are both made of austenitic stainless steel materials, so that the corrosion resistance of the product can be effectively improved, and the generation of corrosion products in a loop can be effectively reduced. The corrugated plates 6 are core parts of the separating assembly, and positioning blocks are arranged among the corrugated plates 6, so that the corrugated plates 6 reach designed intervals when being assembled.
In the embodiment, the corrugated plate assembly is arranged in the frame assembly through a jacking device, the jacking device comprises a compression plate 7 and a fastening screw nut 8, and in the installation process of the corrugated plate 6, after the corrugated plate 6 is installed from the opening of the top support 1, the compression plate 7 is pushed to enable the corrugated plate 6 to reach the designed clearance by rotating the fastening screw nut 8, and meanwhile, the corrugated plate 6 is prevented from loosening, so that the corrugated plate 6 vibrates during operation, and the adverse effect on the equipment safety is generated. After the corrugated plate 6 is pressed, the end parts of the fastening screws and nuts 8 are welded and fixed, so that the possibility of looseness caused by connection of the fastening screws and nuts 8 under the action of air flow in the operation process is further prevented.
The utility model discloses a steam-water separation unit for steam-water separation reheater's working process as follows:
wet steam enters from the inlet gas uniform hole plates 2 on two sides of the Y-shaped separating assembly, and water drops in the steam are attached to the corrugated plate 6 and form a water film in a curve channel formed by the corrugated plate 6 under the action of centrifugal force, inertial force and adhesion force, and the water film is more favorable for the attachment of fine water drops so as to enable a large amount of liquid drops to be attached to the water film. Meanwhile, the steam flows through the area of the corrugated plate 6, water on the plate wall can be collected and water drops in the steam flow can be captured in the hook-shaped grooves of the corrugated plate 6, the gradually thickened water drops are gathered downwards along the corrugated plate 6 under the action of gravity and flow into the drain groove 5 along the hook-shaped grooves, and the steam separated from the separation assembly enters a reheater to be reheated so as to obtain dry steam meeting the requirements.
The utility model discloses a catch water unit for catch water reheater has increased the steam separation area in effectual catch water reheater (MSR) space, improves the catch water ability.
The corrugated plate 6 is made of stainless steel, so that corrosion products in a loop can be effectively reduced, and the service life is prolonged; the corrugated plate 6 is compressed by the side edges, so that the compression effect is ensured, and the steam circulation space is saved.
Right the utility model discloses a steam-water separation unit for steam-water separation reheater has carried out operating condition's thermal state steam-water separation experiment. Experimental operating mode parameter according to catch water reheater (MSR) actual operation in the nuclear power station, right the utility model discloses a catch water is vapour water separation unit for the reheater experimental, has surveyed in detail in the testing process characteristics such as humidity, pressure drop that the separation element was imported and exported.
As shown in fig. 3, a graph a shows the relationship between the outlet steam humidity and the inlet steam flow rate of the separation unit under the condition of the steam-water separator reheater (MSR) of 1.1MPa in practice, and a graph b shows the relationship between the pressure drop and the inlet steam flow rate of the separation unit under the condition of the steam-water separator reheater (MSR) of 1.1MPa in practice.
Through the experiment of thermal state catch water, show, the utility model discloses a steam and water separation unit export steam humidity and pressure drop for the catch water reheater satisfy the industrial design requirement, and its separation efficiency and pressure drop are superior to other like products that present nuclear power plant is using.
The frame of the steam-water separation unit for the steam-water separation reheater of the utility model is subjected to intensity calculation, and a finite element program is adopted to carry out model simplification on the frame to obtain a geometric model; through calculating, the utility model discloses a steam-water separation unit for steam-water separation reheater's the biggest equivalent stress of frame is less than the yield limit under the design temperature, the utility model discloses an intensity of steam-water separation unit for steam-water separation reheater's frame satisfies the requirement.
The basic principles and the main features of the invention and the advantages of the invention have been shown and described above. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are intended to illustrate the principles of the invention, and that various changes and modifications may be made without departing from the spirit and scope of the invention, which is defined by the appended claims and their equivalents.
Claims (6)
1. The steam-water separation unit for the steam-water separation reheater is characterized by comprising at least two Y-shaped symmetrically-arranged separation assemblies, wherein each separation assembly is composed of a frame assembly and a corrugated plate assembly, the corrugated plate assemblies are arranged in the frame assemblies, each frame assembly comprises a top support, an inlet gas equalizing hole plate, a bottom support and a drainage groove, and the drainage groove is formed in the lower portion of the bottom support.
2. The steam-water separation unit for the steam-water separation reheater of claim 1, wherein the air holes arranged in a regular triangle are arranged on the air hole plate at the inlet.
3. The steam-water separation unit for a steam-water separator reheater of claim 1 wherein a steam outlet weir plate is provided on said base support.
4. The steam-water separation unit for the steam-water separator reheater of claim 1, wherein the lower portion of the hydrophobic groove is provided with a rectangular opening.
5. The steam-water separation unit for the steam-water separator reheater of claim 1, wherein the corrugated plate component is composed of corrugated plates and water-retaining hooks welded on the corrugated plates, and positioning blocks are arranged between the corrugated plates.
6. The steam-water separation unit for the steam-water separator reheater of claim 1, wherein said corrugated plate assembly is disposed in said frame assembly by a tightening device, said tightening device comprises a compression plate and a set screw nut, and said compression plate is fixed at two ends of said separation assembly by said set screw nut.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022255324.3U CN213995376U (en) | 2020-10-12 | 2020-10-12 | Steam-water separation unit for steam-water separation reheater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022255324.3U CN213995376U (en) | 2020-10-12 | 2020-10-12 | Steam-water separation unit for steam-water separation reheater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213995376U true CN213995376U (en) | 2021-08-20 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022255324.3U Active CN213995376U (en) | 2020-10-12 | 2020-10-12 | Steam-water separation unit for steam-water separation reheater |
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| Country | Link |
|---|---|
| CN (1) | CN213995376U (en) |
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- 2020-10-12 CN CN202022255324.3U patent/CN213995376U/en active Active
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Address after: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee after: Shanghai Nuclear Engineering Research and Design Institute Co.,Ltd. Patentee after: DEC (GUANGZHOU) HEAVY MACHINERY Co.,Ltd. Address before: No. 29 Hong Cao Road, Xuhui District, Shanghai Patentee before: SHANGHAI NUCLEAR ENGINEERING RESEARCH & DESIGN INSTITUTE Co.,Ltd. Patentee before: DEC (GUANGZHOU) HEAVY MACHINERY Co.,Ltd. |