CN214476441U - Intermediate steam-water separation direct-current steam generation system - Google Patents
Intermediate steam-water separation direct-current steam generation system Download PDFInfo
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- CN214476441U CN214476441U CN202120365073.6U CN202120365073U CN214476441U CN 214476441 U CN214476441 U CN 214476441U CN 202120365073 U CN202120365073 U CN 202120365073U CN 214476441 U CN214476441 U CN 214476441U
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 93
- 238000000926 separation method Methods 0.000 title claims abstract description 16
- 239000002826 coolant Substances 0.000 claims abstract description 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000001704 evaporation Methods 0.000 claims description 19
- 230000008020 evaporation Effects 0.000 claims description 19
- 239000000203 mixture Substances 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 238000013021 overheating Methods 0.000 claims description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 230000002349 favourable effect Effects 0.000 abstract 1
- 230000001276 controlling effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
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Abstract
The utility model discloses a system for middle steam-water separation's direct current steam takes place, this system includes steam generator and reactor, wherein: the outlet of the reactor is connected with the third inlet of the steam generator, the third outlet of the steam generator is connected with the inlet of the reactor, and the heat generated by the reactor is brought into the steam generator by the flow of the coolant of the reactor. The utility model discloses water consumption, heat consumption are less in the start-up process, because catch water places before the superheated section of evaporimeter, and the unit is in operation, when the feedwater takes place to fluctuate, and water can not get into the superheated section, and main steam temperature is undulant little, is favorable to the safe operation of unit, and the unit is shut down all around suddenly after, during the restart, because water can not get into the higher superheated section of temperature, cooling time is shorter among the unit restart process, has improved the usability of unit.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power, concretely relates to direct current steam generation's of middle catch water system.
Background
In the high-temperature gas-cooled reactor nuclear power plant constructed at present, a steam-water separator is arranged at an outlet of an evaporator (a superheating section), and water must flow through a superheater in a startup and shutdown stage. The current design has several problems:
(1) The unit consumes a large amount of water and heat in the starting process;
(2) when the unit is in operation, when the water supply fluctuates, the water directly enters the superheat section, the temperature fluctuation of the main steam is large, and the safe operation of the unit is not facilitated;
(3) after the unit is suddenly and completely shut down, the high-pressure heater and the low-pressure heater lose heating steam sources, the water supply temperature of the evaporator can only be heated to about 120 ℃, the outlet temperature of the evaporator is about 570 ℃, the evaporator needs to be cooled for a long time when water circulation is established in the two loops, and the usability of the unit is reduced.
SUMMERY OF THE UTILITY MODEL
An object of the utility model is to provide a system that middle steam-water separation's direct current steam takes place to the not enough of present unit system.
The utility model discloses a following technical scheme realizes:
a system for generating direct current steam with intermediate steam-water separation comprises a steam generator and a reactor; wherein,
the outlet of the reactor is connected with the third inlet of the steam generator, the third outlet of the steam generator is connected with the inlet of the reactor, and the heat generated by the reactor is brought into the steam generator by the flow of the coolant of the reactor.
The utility model discloses a further improvement lies in, steam generator is a shell and tube heat exchanger, and intraductal for water and steam, be called steam generator's secondary side, the coolant of reactor is regarded as to the outside of tubes, is called steam generator's the side that inclines, and the water absorption steam generator secondary side inclines the heat back temperature of the coolant of reactor to improve and produce steam, is called steam generation, and the process that water produced vapour is accomplished at a flow, is called the direct current.
The utility model has the further improvement that the steam generator comprises an evaporation section and a superheating section; the first inlet of the steam generator is connected with the inlet of the evaporation section, the outlet of the evaporation section is connected with the first outlet of the steam generator, the second inlet of the steam generator is connected with the inlet of the superheating section, and the outlet of the superheating section is connected with the second outlet of the steam generator.
The utility model has the further improvement that the utility model also comprises a first valve group, a steam-water separator and a second valve group; the outlet of the first valve group is connected with a first inlet of the steam generator, a first outlet of the steam generator is connected with an inlet of the steam-water separator, a first outlet of the steam-water separator is connected with a second inlet of the steam generator, and a second outlet of the steam-water separator is connected with an inlet of the second valve group.
The utility model discloses further improvement lies in, and steam-water separator is located steam generator's evaporation zone and superheated section between, is called middle steam-water separation, and steam-water separator's effect is to carry out steam-water separation with the steam-water mixture that gets into its inside, and steam gets into steam generator's second entry through steam-water separator's first export, and water gets into the entry of second valve group through steam-water separator's second export.
The utility model discloses further improvement lies in, and first valve group and second valve group comprise stop valve and governing valve.
The utility model has the further improvement that the system also comprises a steam turbine, a steam turbine bypass valve group and a condenser; the outlet of the second valve group is connected with the first inlet of the condenser, the second outlet of the steam generator is divided into two streams, the first stream is connected with the inlet of the steam turbine, the second stream is connected with the inlet of the turbine bypass valve group, the outlet of the steam turbine is connected with the second inlet of the condenser, and the outlet of the turbine bypass valve group is connected with the third inlet of the condenser.
The utility model discloses a further improvement lies in, the load of steam turbine is along with the change of reactor power and synchronous regulation.
The utility model discloses at least, following profitable technological effect has:
the utility model provides a pair of middle catch water's direct current steam generation's system has following several obvious advantages in the aspect:
(1) the water consumption and the heat consumption of the unit are small in the starting process;
(2) because the steam-water separator is arranged in front of the overheating section of the evaporator, when the unit is in operation, water cannot enter the overheating section when the feed water fluctuates, the temperature fluctuation of the main steam is small, and the safe operation of the unit is facilitated;
(3) After the unit is suddenly and comprehensively stopped and restarted, because water cannot enter a superheat section with higher temperature, the cooling time in the restarting process of the unit is shorter, and the usability of the unit is improved.
Drawings
Fig. 1 is a block diagram of a system for generating intermediate steam-water separated direct-current steam according to the present invention.
Description of reference numerals:
1. the system comprises a first valve group, a steam generator, a steam evaporation section, a steam-water separator, a second valve group, a steam condenser, a superheating section, a steam turbine bypass valve group, a steam turbine and a reactor, wherein the first valve group 2, the steam generator 3, the steam evaporation section 4, the steam-water separator 5, the second valve group 6, the steam condenser 7, the superheating section 8, the steam turbine bypass valve group 9, the steam turbine 10 and the reactor.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, the utility model provides a system for direct current steam generation of middle steam-water separation, including first valve group 1, steam generator 2, catch water 4, second valve group 5, condenser 6, turbine by-pass valve group 8, steam turbine 9 and reactor 10. The steam generator 2 comprises an evaporation section 3 and a superheating section 7; wherein, the first inlet of the steam generator 2 is connected with the inlet of the evaporation section 3, the outlet of the evaporation section 3 is connected with the first outlet of the steam generator 2, the second inlet of the steam generator 2 is connected with the inlet of the superheating section 7, and the outlet of the superheating section 7 is connected with the second outlet of the steam generator 2. The outlet of the reactor 10 is connected to the third inlet of the steam generator 2, the third outlet of the steam generator 2 is connected to the inlet of the reactor 10, and the heat generated by the reactor 10 is taken into the steam generator 2 by the flow of the coolant of the reactor 10. The outlet of the first valve group 1 is connected with the first inlet of the steam generator 2, the first outlet of the steam generator 2 is connected with the inlet of the steam-water separator 4, the first outlet of the steam-water separator 4 is connected with the second inlet of the steam generator 2, and the second outlet of the steam-water separator 4 is connected with the inlet of the second valve group 5. The outlet of the second valve set 5 is connected with the first inlet of the condenser 6, the second outlet of the steam generator 2 is divided into two parts, the first part is connected with the inlet of the steam turbine 9, the second part is connected with the inlet of the turbine bypass valve set 8, the outlet of the steam turbine 9 is connected with the second inlet of the condenser 6, and the outlet of the turbine bypass valve set 8 is connected with the third inlet of the condenser 6.
Preferably, the steam generator 2 is a shell-and-tube heat exchanger, water and steam are contained in the tube, which is called the secondary side of the steam generator 2, coolant of the reactor 10 is contained outside the tube, which is called the primary side of the steam generator 2, the temperature of the water on the secondary side of the steam generator 2 is increased to generate steam after absorbing heat of the coolant of the reactor 10 on the primary side of the steam generator 2, which is called steam generation, and the process of generating steam by water is completed in one flow, which is called direct current.
Preferably, the steam-water separator 4 is located between the evaporation section 3 and the superheating section 7 of the steam generator 2, which is called intermediate steam-water separation, the steam-water separator 4 is used for performing steam-water separation on steam-water mixture entering the steam generator 2, steam enters the second inlet of the steam generator 2 through the first outlet of the steam-water separator 4, and water enters the inlet of the second valve set 5 through the second outlet of the steam-water separator 4.
Preferably, the first valve group 1 and the second valve group 5 are both composed of a stop valve and a regulating valve.
The utility model provides a pair of middle catch water's direct current steam generation's system, the during operation, including following step:
1) at the initial stage of starting the nuclear power unit, water is injected into the steam generator 2 under the control of the regulating valve of the first valve group 1, and water injected into the steam generator 2 enters the steam-water separator 4 through the evaporation section 3;
2) When the evaporation section 3 is filled with water and the water level of the steam-water separator 4 is visible, the water discharge of the steam-water separator 4 is controlled by the regulating valve of the second valve group 5 to maintain the normal water level of the steam-water separator 4;
3) the power of the reactor 10 is increased, the temperature of the coolant of the reactor 10 is increased, and the coolant of the reactor 10 transfers heat to water in the evaporation section 3 through the steam generator 2;
4) along with the further improvement of the power of the reactor 10, steam is generated at the outlet of the evaporation section 3, a steam-water mixture is separated in the steam-water separator 4, water is discharged into the condenser 6 through the second valve group 5, and steam enters the condenser 6 through the superheating section 7 in the steam generator 4 and the turbine bypass valve group 8;
5) controlling the pressure of the secondary side of the steam generator 2 and the pressure of the steam-water separator 4 by controlling a turbine bypass valve group 8;
6) along with the further improvement of the power of the reactor 10, the steam generated at the outlet of the evaporation section 3 is increased, and the water quantity is reduced until the steam is completely changed into steam;
7) when the steam generated by the superheating section 7 meets the running requirement of the steam turbine 9, the steam enters the steam turbine 9, the steam turbine 9 operates with load, and the steam turbine bypass valve group 8 is gradually closed until the steam turbine bypass valve group is completely closed.
Thereafter, the load of the steam turbine 9 is synchronously adjusted as the power of the reactor 10 changes.
Claims (5)
1. The system for generating the direct-current steam for intermediate steam-water separation is characterized by comprising a steam generator (2), a steam-water separator (4) and a reactor (10); wherein,
the outlet of the reactor (10) is connected with the third inlet of the steam generator (2), the third outlet of the steam generator (2) is connected with the inlet of the reactor (10), and the heat generated by the reactor (10) is brought into the steam generator (2) through the flow of the coolant of the reactor (10);
the steam generator (2) comprises an evaporation section (3) and a superheating section (7); wherein, a first inlet of the steam generator (2) is connected with an inlet of the evaporation section (3), an outlet of the evaporation section (3) is connected with a first outlet of the steam generator (2), a second inlet of the steam generator (2) is connected with an inlet of the superheating section (7), and an outlet of the superheating section (7) is connected with a second outlet of the steam generator (2);
the steam-water separator (4) is positioned between the evaporation section (3) and the overheating section (7) of the steam generator (2) and is called as intermediate steam-water separation, the steam-water separator (4) is used for separating steam from steam of steam-water mixture entering the steam generator, steam enters a second inlet of the steam generator (2) through a first outlet of the steam-water separator (4), and water enters an inlet of the second valve group (5) through a second outlet of the steam-water separator (4).
2. The system for once-through steam generation with intermediate steam-water separation according to claim 1, characterized in that the steam generator (2) is a shell-and-tube heat exchanger, water and steam are arranged in the tube, the tube is called the secondary side of the steam generator (2), coolant of the reactor (10) is arranged outside the tube, the tube is called the primary side of the steam generator (2), the water on the secondary side of the steam generator (2) absorbs heat of the coolant of the reactor (10) on the primary side of the steam generator (2), the temperature is increased to generate steam, the steam generation is called steam generation, and the process of generating steam by water is completed in one process, and the process is called once-through.
3. An intermediate steam-water separation once-through steam generation system according to claim 1, further comprising a first valve group (1) and a second valve group (5); the outlet of the first valve group (1) is connected with the first inlet of the steam generator (2), the first outlet of the steam generator (2) is connected with the inlet of the steam-water separator (4), the first outlet of the steam-water separator (4) is connected with the second inlet of the steam generator (2), and the second outlet of the steam-water separator (4) is connected with the inlet of the second valve group (5).
4. An intermediate steam-water separation once-through steam generation system according to claim 3, characterized in that the first valve group (1) and the second valve group (5) are composed of a stop valve and a regulating valve.
5. An intermediate steam-water separation once-through steam generation system according to claim 3, characterized by further comprising a steam turbine (9), a turbine bypass valve set (8) and a condenser (6); the outlet of the second valve group (5) is connected to the first inlet of the condenser (6), the second outlet of the steam generator (2) is divided into two parts, the first part is connected to the inlet of the steam turbine (9), the second part is connected to the inlet of the turbine bypass valve group (8), the outlet of the steam turbine (9) is connected to the second inlet of the condenser (6), and the outlet of the turbine bypass valve group (8) is connected to the third inlet of the condenser (6).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120365073.6U CN214476441U (en) | 2021-02-07 | 2021-02-07 | Intermediate steam-water separation direct-current steam generation system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120365073.6U CN214476441U (en) | 2021-02-07 | 2021-02-07 | Intermediate steam-water separation direct-current steam generation system |
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| Publication Number | Publication Date |
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| CN214476441U true CN214476441U (en) | 2021-10-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120365073.6U Active CN214476441U (en) | 2021-02-07 | 2021-02-07 | Intermediate steam-water separation direct-current steam generation system |
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| CN (1) | CN214476441U (en) |
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2021
- 2021-02-07 CN CN202120365073.6U patent/CN214476441U/en active Active
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