CN216811805U - Steam conversion device - Google Patents
Steam conversion device Download PDFInfo
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- CN216811805U CN216811805U CN202122552421.3U CN202122552421U CN216811805U CN 216811805 U CN216811805 U CN 216811805U CN 202122552421 U CN202122552421 U CN 202122552421U CN 216811805 U CN216811805 U CN 216811805U
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Abstract
The utility model relates to the technical field of pressurized water reactor systems, and particularly discloses a steam conversion device. The device comprises a pressure reducing regulating valve component and a pressure transmitter component, wherein the pressure reducing regulating valve component is arranged on a main steam outlet main pipe between a main steam system and an auxiliary steam distribution system, and reduces the steam pressure output by the main steam outlet main pipe to an input threshold value; the pressure transmitter assembly is arranged on a main steam outlet main pipe between the pressure reduction regulating valve assembly and the auxiliary steam distribution system, the pressure value of steam after pressure reduction through the pressure reduction regulating valve assembly is monitored in real time, and the main steam outlet main pipe is controlled to input steam into the auxiliary steam distribution system after a threshold value is reached. The device structure letter is answered, and the simple operation has avoided current steam conversion system complicated, the difficult problem of operation maintenance, directly steps down through main steam system simultaneously, and the heat utilization efficiency of steam can promote.
Description
Technical Field
The utility model belongs to the technical field of pressurized water reactor systems, and particularly relates to a steam conversion device.
Background
A second-generation pressurized water reactor nuclear power plant adopting a French M310 reactor type is provided with a steam conversion System (STR), and the steam conversion System (STR) has the main function of generating low-pressure steam by utilizing main steam through the system and supplying steam to nuclear island and conventional island auxiliary steam users through an auxiliary steam distribution system. The purpose that the power station set up steam conversion system is to keep apart auxiliary steam and main steam system's direct contact, prevents that main steam from spreading external environment and threatening personnel's safety through auxiliary steam system when suffering radioactive contamination.
However, in french RCC-P, rules for design and construction of nuclear power plant systems, there are no requirements for the nuclear safety function and the nuclear safety protection of the system, nor are there any requirements for the nuclear safety rating of the system and its equipment. The system is an auxiliary system in a conventional island, and the design rule is that the steam consumption of rated parameters can be continuously and reliably provided for auxiliary steam users during the starting and running.
The steam conversion System (STR) was derived from the french 900MW nuclear power plant design, but the steam converters in the fersenheim and budey nuclear power plants, which are 900MW exemplary nuclear power plants, and the first trierstin nuclear power plants designed using the standard 900MW nuclear power plant were also deactivated due to severe tube bundle leakage after extended use. In the actual operation experience of the great gulf, the #1 unit STR system is stopped to be overhauled due to the crack of the steam converter, and the time is half a year. In the co-development of european pressurized water reactors (EPR) in france and germany, the steam converter system is also explicitly eliminated and taken as one of the conventional island design improvements to EPR. There is no steam conversion System (STR) in the conventional island design of pressurized water reactor nuclear power plants in the united states, japan, and auxiliary steam is supplied directly from main steam through a pressure reducing valve or with steam after secondary reheating. Currently, there is no steam conversion system in the design of three-door nuclear power plants, nor in the conventional Qinshan three-phase island designed by Bechtel, Inc. of the United states.
The steam converter System (STR) has more defects in actual operation, the system is complex to operate when a unit is started or stopped, and main steam needs to pass through a surface type heat exchange link of the steam converter, so that heat is lost.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a steam conversion device, which solves the problems of complex structure, complex operation and more heat loss of the existing steam conversion system, avoids the influence on production operation caused by the defects of the existing steam conversion system, and provides the safety and the reliability of the operation.
The technical scheme of the utility model is as follows: a steam conversion device comprises a pressure reducing regulating valve component and a pressure transmitter component, wherein the pressure reducing regulating valve component is arranged on a main steam outlet main pipe between a main steam system and an auxiliary steam distribution system, and reduces the steam pressure output by the main steam outlet main pipe to an input threshold value; the pressure transmitter assembly is arranged on a main steam outlet main pipe between the pressure reduction regulating valve assembly and the auxiliary steam distribution system, the pressure value of steam after pressure reduction through the pressure reduction regulating valve assembly is monitored in real time, and the main steam outlet main pipe is controlled to input steam into the auxiliary steam distribution system after a threshold value is reached.
And when the steam pressure in the main steam outlet main pipe reaches a pressure relief threshold value, the pressure transmitter assembly controls the pressure relief valve to relieve the pressure of the steam in the main steam outlet main pipe.
The pressure reduction regulating valve assembly comprises a pressure reduction valve and pressure reduction stop valves, the pressure reduction stop valves are symmetrically distributed at two ends of the pressure reduction regulating valve assembly, and the pressure reduction valve is arranged between the two pressure reduction stop valves to control steam to flow into and out of the pressure reduction regulating valve assembly.
The number of the pressure reducing regulating valve assemblies is 2, and the two pressure reducing regulating valve assemblies are connected into the main steam outlet main pipe in parallel so as to prevent one of the two pressure reducing regulating valve assemblies from failing.
The pressure transmitter subassembly includes stop valve and manometer, stop valve quantity is 2, the manometer passes through two stop valve access main steam outlet female pipes, and when the steam pressure value exceeded the manometer and bore the threshold value, the stop valve was in time closed to the protection manometer.
The number of the pressure transmitter assemblies is 2, the pressure transmitter assemblies are respectively connected into the main steam outlet main pipe, and the average value of the steam pressure values respectively measured by the two pressure transmitter assemblies is calculated so as to obtain the more accurate steam pressure value of the main steam outlet main pipe.
The number of the pressure relief valves is 2, and the pressure relief valves are respectively connected to the main steam outlet main pipe to prevent one of the two pressure relief valves from failing.
The input threshold is 1.2 Mpa.
The pressure relief threshold value is 2.5 Mpa.
The utility model has the remarkable effects that: according to the steam conversion device, the pressure reduction regulating valve assembly is used for reducing the output steam pressure of the main steam system to the steam pressure value required by the auxiliary steam distribution system; the device structure letter is answered, and the simple operation has avoided current steam conversion system complicated, the difficult problem of operation maintenance, directly steps down through main steam system simultaneously, and the heat utilization efficiency of steam can promote.
Drawings
FIG. 1 is a schematic diagram of a steam reformer according to the present invention;
in the figure: 1. a primary steam system; 2. an auxiliary steam distribution system; 11. a main steam outlet main pipe; 22. a pressure reducing valve; 23. a stop valve; 24. a pressure gauge; 25. a pressure relief valve; 26. a pressure reducing regulator valve assembly; 27. a pressure transmitter assembly.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic views illustrating only the basic structure of the present invention in a schematic manner, and thus show only the constitution related to the present invention.
As shown in fig. 1, a steam conversion device comprises a pressure reducing regulating valve assembly 26 and a pressure transmitter assembly 27, wherein the pressure reducing regulating valve assembly 26 is arranged on a main steam outlet main pipe 11 between a main steam system 1 and an auxiliary steam distribution system 2, the absolute pressure of steam output by the main steam system 1 is 6.63MPa, and the steam is subjected to pressure reducing regulation by the pressure reducing regulating valve assembly 26, so that the steam pressure input into the auxiliary steam distribution system 2 is 1.2MPa, specifically, the pressure reducing regulating valve assembly 26 comprises a pressure reducing valve 22 and pressure reducing stop valves, the pressure reducing stop valves are symmetrically arranged at two ends of the pressure reducing regulating valve assembly 26, and a pressure reducing valve 22 is arranged between the two pressure reducing stop valves to control the steam to flow into and out of the pressure reducing regulating valve assembly 26; specifically, the number of the pressure reducing regulating valve assemblies 26 is 2, and two pressure reducing regulating valve assemblies 26 are connected in parallel and connected into the main steam outlet main pipe 11, so that one of the two pressure reducing regulating valve assemblies 26 is prevented from failing;
a pressure transmitter assembly 27 is arranged on the main steam outlet main pipe 11 between the pressure reduction regulating valve assembly 26 and the auxiliary steam distribution system 2, the pressure transmitter assembly 27 monitors the steam pressure value reduced by the pressure reduction regulating valve assembly 26 in real time, and when the detected steam pressure value reaches 1.2MPa, the main steam outlet main pipe 11 is controlled to input steam into the auxiliary steam distribution system 2; specifically, the pressure transmitter assembly 27 comprises stop valves 23 and pressure gauges 24, the number of the stop valves 23 is 2, the pressure gauges 24 are connected to the main steam outlet main pipe 11 through the two stop valves 23, and when the steam pressure value exceeds a pressure gauge 24 bearing threshold value, the stop valves 23 are closed in time to protect the pressure gauges 24; specifically, the number of the pressure transmitter assemblies 27 is 2, the pressure transmitter assemblies are respectively connected to the main steam outlet main pipe 11, and the average value of the number of the pressure meters 24 in the two pressure transmitter assemblies 27 is calculated, so as to obtain more accurate steam pressure in the main steam outlet main pipe 11;
be equipped with pressure relief valve 25 between pressure transmitter subassembly 27 and the supplementary steam distribution system 2, work as when the steam pressure value of the female pipe 11 of main steam outlet is monitored to pressure transmitter subassembly 27 surpasses 2.5Mpa, pressure transmitter subassembly 27 control pressure relief valve 25 carries out the release to the steam of the female pipe 11 of main steam outlet, specifically, pressure relief valve 25 quantity is 2, inserts the female pipe 11 of main steam outlet respectively to one of two pressure relief valves 25 takes place to become invalid.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations can be made by the worker in the light of the above teachings without departing from the spirit of the utility model. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A steam conversion device, characterized by: the device comprises a pressure reducing regulating valve assembly (26) and a pressure transmitter assembly (27), wherein the pressure reducing regulating valve assembly (26) is arranged on a main steam outlet main pipe (11) between a main steam system (1) and an auxiliary steam distribution system (2), and the pressure reducing regulating valve assembly (26) reduces the steam pressure output by the main steam outlet main pipe (11) to an input threshold value; the pressure transmitter assembly (27) is arranged on a main steam outlet main pipe (11) between the pressure reducing regulating valve assembly (26) and the auxiliary steam distribution system (2), the pressure value of steam after pressure reduction through the pressure reducing regulating valve assembly (26) is monitored in real time, and the main steam outlet main pipe (11) is controlled to input steam into the auxiliary steam distribution system (2) after a threshold value is reached.
2. A steam conversion device according to claim 1, wherein: be equipped with pressure relief valve (25) on the female pipe of main steam outlet (11) between pressure transmitter subassembly (27) and supplementary steam distribution system (2), when the steam pressure in the female pipe of main steam outlet (11) reached the release threshold value, pressure transmitter subassembly (27) control pressure relief valve (25) carried out the release to the steam in the female pipe of main steam outlet (11).
3. A steam conversion device according to claim 1, wherein: the pressure reducing regulating valve assembly (26) comprises a pressure reducing valve (22) and pressure reducing stop valves, the pressure reducing stop valves are symmetrically distributed at two ends of the pressure reducing regulating valve assembly (26), and the pressure reducing valve (22) is arranged between the two pressure reducing stop valves to control steam to flow into and out of the pressure reducing regulating valve assembly (26).
4. A steam conversion device according to claim 1, wherein: the number of the pressure reducing regulating valve assemblies (26) is 2, and two pressure reducing regulating valve assemblies (26) are connected into the main steam outlet main pipe (11) in parallel to prevent one of the two pressure reducing regulating valve assemblies (26) from failing.
5. A steam reformer according to claim 1, wherein: pressure transmitter subassembly (27) are including stop valve (23) and manometer (24), stop valve (23) quantity is 2, manometer (24) insert main steam outlet female pipe (11) through two stop valves (23), and when the steam pressure value exceeded manometer (24) and bore the threshold value, stop valve (23) in time closed to protection manometer (24).
6. A steam conversion device according to claim 1, wherein: the number of the pressure transmitter assemblies (27) is 2, the pressure transmitter assemblies are respectively connected into the main steam outlet main pipe (11), and the average value of the steam pressure values respectively measured by the two pressure transmitter assemblies (27) is calculated so as to obtain the more accurate steam pressure value of the main steam outlet main pipe (11).
7. A steam conversion device according to claim 2, wherein: the number of the pressure relief valves (25) is 2, and the pressure relief valves are respectively connected to the main steam outlet main pipe (11) so as to prevent one of the two pressure relief valves (25) from failing.
8. A steam conversion device according to claim 1, wherein: the input threshold is 1.2 Mpa.
9. A steam reformer according to claim 2, wherein: the pressure relief threshold value is 2.5 Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122552421.3U CN216811805U (en) | 2021-10-22 | 2021-10-22 | Steam conversion device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122552421.3U CN216811805U (en) | 2021-10-22 | 2021-10-22 | Steam conversion device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216811805U true CN216811805U (en) | 2022-06-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122552421.3U Active CN216811805U (en) | 2021-10-22 | 2021-10-22 | Steam conversion device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216811805U (en) |
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2021
- 2021-10-22 CN CN202122552421.3U patent/CN216811805U/en active Active
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