CN214303961U - Helium-carbon dioxide heat exchange system - Google Patents
Helium-carbon dioxide heat exchange system Download PDFInfo
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- CN214303961U CN214303961U CN202120364692.3U CN202120364692U CN214303961U CN 214303961 U CN214303961 U CN 214303961U CN 202120364692 U CN202120364692 U CN 202120364692U CN 214303961 U CN214303961 U CN 214303961U
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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
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- 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 helium-carbon dioxide heat exchange system, which comprises a helium-carbon dioxide heat exchanger, a helium inlet header, a helium outlet header, a carbon dioxide inlet header and a carbon dioxide outlet header; the outlet of the helium inlet header tank is connected with the first inlet of the helium-carbon dioxide heat exchanger, the first outlet of the helium-carbon dioxide heat exchanger is connected with the inlet of the helium outlet header tank, the outlet of the carbon dioxide inlet header tank is connected with the second inlet of the helium-carbon dioxide heat exchanger, and the second outlet of the helium-carbon dioxide heat exchanger is connected with the inlet of the carbon dioxide outlet header tank. The utility model discloses well supercritical carbon dioxide power generation circulation full operating mode scope does not have the phase transition, and a second loop heat exchanger is gas-gas (helium-supercritical carbon dioxide) heat exchanger, has avoided dry and wet attitude conversion, has avoided opening the problem such as the two-phase flow instability who opens and stop and operation process, from the mechanism very big degree avoid the problem that the heat exchanger flows and causes the vibration.
Description
Technical Field
The utility model belongs to the technical field of the nuclear power, concretely relates to helium-carbon dioxide heat exchange's system.
Background
The heat generated by the nuclear fuel in the primary loop of the current high-temperature gas cooled reactor demonstration power station is transferred to the water in the secondary loop through a helium-water shell-and-tube spiral tube heat exchanger (a direct-current evaporator) and a system thereof.
This system has some problems:
(1) the system has a complex structure, and particularly, the direct-current evaporator is difficult to manufacture and operate;
(2) a large amount of abnormal sound is generated in a pressurizing experiment before leaving a factory and in cold test and hot test processes of the evaporator, the reason cannot be confirmed at present, and the abnormal sound cannot be eliminated, so that the abnormal sound is a potential safety hazard for safe operation of a unit;
(3) the collision and friction exist between the spherical nuclear fuel and the pressure vessel carbon bricks when the unit is in operation, so that graphite dust is difficult to avoid, and cannot be removed at present;
(4) the primary helium fan is arranged in the evaporator, and any fault of the primary helium fan needs to open an end cover of the evaporator for inspection, so that the pressure boundary of a primary loop is damaged;
(5) in the high-temperature gas cooled reactor nuclear power station demonstration project under construction at present, steam with the pressure of 14MPa and the temperature of 570 ℃ is contained in an evaporator heat exchange pipe, helium with radioactive graphite dust with the pressure of 7MPa and the temperature of 750 ℃ is contained outside the heat exchange pipe, and the heat exchange pipe is greatly damaged after leakage in operation.
(6) The leakage of one heat exchange tube under a large load can damage the adjacent heat exchange tube, the damage of a large number of heat exchange tubes can influence the output of a unit, and even the evaporator is scrapped.
(7) In the starting and stopping stage and the dry-wet state conversion stage, the temperature and the flow of water supply at the inlet of the evaporator are difficult to control, the pressure fluctuation at the outlet of the evaporator is large, the temperature change of main steam is severe, and the operation safety of the evaporator and a steam turbine is influenced.
(8) After the accident shutdown, the unit needs to be cooled for a long time to establish the water circulation starting again, so that the availability and the economy of the unit are influenced.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the not enough of prior art, provide a helium-carbon dioxide heat exchange's system.
In order to achieve the above purpose, the utility model adopts the following technical scheme to realize:
a helium-carbon dioxide heat exchange system comprises a helium-carbon dioxide heat exchanger, a helium inlet header, a helium outlet header, a carbon dioxide inlet header and a carbon dioxide outlet header; wherein the content of the first and second substances,
the outlet of the helium inlet header tank is connected with the first inlet of the helium-carbon dioxide heat exchanger, the first outlet of the helium-carbon dioxide heat exchanger is connected with the inlet of the helium outlet header tank, the outlet of the carbon dioxide inlet header tank is connected with the second inlet of the helium-carbon dioxide heat exchanger, and the second outlet of the helium-carbon dioxide heat exchanger is connected with the inlet of the carbon dioxide outlet header tank.
The utility model discloses further improvement lies in, the filter screen that can wash, dismantle is equipped with in the helium inlet collection incasement to be equipped with differential pressure monitoring arrangement and keep watch on the filter screen differential pressure.
The utility model discloses a further improvement lies in, is equipped with the filter screen that can wash, dismantle in the carbon dioxide entry collection incasement to be equipped with differential pressure monitoring device and keep watch on the filter screen differential pressure, helium-carbon dioxide heat exchanger is a plate heat exchanger.
The utility model has the further improvement that the device also comprises a helium circulator, a reactor pressure vessel inlet pipeline and a reactor pressure vessel; wherein the content of the first and second substances,
the outlet of the helium outlet header is connected with the inlet of the helium blower, the outlet of the helium blower is connected with the inlet of the inlet pipeline of the reactor pressure vessel, the outlet of the inlet pipeline of the reactor pressure vessel is connected with the inlet of the reactor pressure vessel, the outlet of the reactor pressure vessel is connected with the inlet of the outlet pipeline of the reactor pressure vessel, and the outlet of the outlet pipeline of the reactor pressure vessel is connected with the inlet of the helium inlet header.
The utility model has the further improvement that the utility model also comprises an outlet pipe valve group of the pressure carbon dioxide turbine, a compressor, an inlet pipe valve group of the carbon dioxide turbine and the carbon dioxide turbine; wherein the content of the first and second substances,
the outlet of the carbon dioxide outlet header is connected with the inlet of the carbon dioxide turbine inlet pipe valve bank, the outlet of the carbon dioxide turbine inlet pipe valve bank is connected with the inlet of the carbon dioxide turbine, the outlet of the carbon dioxide turbine is connected with the inlet of the carbon dioxide turbine outlet pipe valve bank, the outlet of the carbon dioxide turbine outlet pipe valve bank is connected with the inlet of the compressor, and the outlet of the compressor is connected with the inlet of the carbon dioxide inlet header.
The utility model discloses a further improvement lies in, contains the check valve in the carbon dioxide turbine outlet pipe valves.
The utility model discloses a further improvement lies in, contains isolation valve and governing valve in the carbon dioxide turbine inlet tube valves.
Compared with the prior art, the utility model discloses following profitable technological effect has at least:
the utility model provides a pair of helium-carbon dioxide heat exchange's system, this system has following several obvious advantages in the aspect with the system that uses usually at present:
1) the filter screen is arranged in the helium system inlet header of the helium-carbon dioxide heat exchanger, so that dust carried in the helium of a primary loop can be filtered and reduced, and the running safety of the unit is improved;
2) the helium-carbon dioxide heat exchanger adopts a plate heat exchanger, the structure of the heat exchanger is stable, and flow-induced vibration cannot occur;
3) the main helium fan) is arranged outside the helium-carbon dioxide heat exchanger, so that fault maintenance is facilitated;
4) the supercritical carbon dioxide power generation cycle has no phase change in the full working condition range, the first and second loop heat exchangers are gas-gas (helium gas-supercritical carbon dioxide) heat exchangers, dry-wet state conversion is avoided, the problems of unstable flow of two-phase flow in the processes of starting, stopping and running and the like are avoided, and the problem of vibration caused by flow of the heat exchangers is avoided to a great extent in mechanism;
5) the supercritical carbon dioxide power generation cycle has more obvious efficiency advantage under the condition of high temperature parameters and is more fit with the positioning of a high-temperature gas cooled reactor. At the grade of 600 ℃, the net efficiency can be improved by 3 to 5 points through water-based working medium circulation, at the grade of 700 ℃, the net efficiency can be improved by 6 to 8 points through water-based working medium circulation.
Drawings
Fig. 1 is a block diagram of a helium-carbon dioxide heat exchange system according to the present invention.
Description of reference numerals:
1. helium-carbon dioxide heat exchanger, 2 helium inlet header, 3 reactor pressure vessel outlet pipeline, 4 helium outlet header, 5 helium main blower, 6 reactor pressure vessel inlet pipeline, 7 carbon dioxide inlet header, 8 carbon dioxide turbine outlet pipe valve group, 9 carbon dioxide outlet header, 10 carbon dioxide turbine inlet pipe valve group, 11 compressor, 12 reactor pressure vessel, 13 carbon dioxide turbine.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and examples.
As shown in fig. 1, the present invention provides a helium-carbon dioxide heat exchange system, which includes a helium-carbon dioxide heat exchanger 1, a helium inlet header 2, a helium outlet header 4, a helium main blower 5, a reactor pressure vessel inlet pipeline 6, a carbon dioxide inlet header 7, a carbon dioxide turbine outlet pipe set 8, a carbon dioxide outlet header 9, a carbon dioxide turbine inlet pipe set 10, a compressor 11, a reactor pressure vessel 12, and a carbon dioxide turbine 13.
The outlet of the helium inlet header 2 is connected to the first inlet of the helium-carbon dioxide heat exchanger 1, the first outlet of the helium-carbon dioxide heat exchanger 1 is connected to the inlet of the helium outlet header 4, the outlet of the carbon dioxide inlet header 7 is connected to the second inlet of the helium-carbon dioxide heat exchanger 1, and the second outlet of the helium-carbon dioxide heat exchanger 1 is connected to the inlet of the carbon dioxide outlet header 9. The outlet of the helium outlet header 4 is connected with the inlet of the helium main blower 5, the outlet of the helium blower 5 is connected with the inlet of the inlet pipeline 6 of the reactor pressure vessel, the outlet of the inlet pipeline 6 of the reactor pressure vessel is connected with the inlet of the reactor pressure vessel 12, the outlet of the reactor pressure vessel 12 is connected with the inlet of the outlet pipeline 3 of the reactor pressure vessel, and the outlet of the outlet pipeline 3 of the reactor pressure vessel is connected with the inlet of the helium inlet header 2. The outlet of the carbon dioxide outlet header 9 is connected with the inlet of a carbon dioxide turbine inlet pipe valve group 10, the outlet of the carbon dioxide turbine inlet pipe valve group 10 is connected with the inlet of a carbon dioxide turbine 13, the outlet of the carbon dioxide turbine 13 is connected with the inlet of a carbon dioxide turbine outlet pipe valve group 8, the outlet of the carbon dioxide turbine outlet pipe valve group 8 is connected with the inlet of a compressor 11, and the outlet of the compressor 11 is connected with the inlet of a carbon dioxide inlet header 7.
Preferably, the helium inlet header 2 is equipped with a cleanable, removable filter screen and with a differential pressure monitoring device to monitor the filter screen differential pressure. The carbon dioxide inlet header 7 is provided with a cleanable, removable filter screen and with a differential pressure monitoring device to monitor the filter screen differential pressure, and the helium-carbon dioxide heat exchanger 1 is a plate heat exchanger.
Preferably, the carbon dioxide turbine outlet line block 8 contains a check valve therein. The carbon dioxide turbine inlet manifold 10 contains isolation valves and regulating valves.
The utility model provides a helium-carbon dioxide heat exchange method, including following step:
the helium-carbon dioxide heat exchanger 1 is connected with other equipment of a helium-carbon dioxide heat exchange system and is connected into the system after cleaning is completed;
a carbon dioxide system is composed of a carbon dioxide turbine outlet pipe valve group 8, a compressor 11, a carbon dioxide inlet header 7, the carbon dioxide side of a helium-carbon dioxide heat exchanger 1, a carbon dioxide outlet header 9, a carbon dioxide turbine inlet pipe valve group 10 and a carbon dioxide turbine 13, carbon dioxide gas is filled into the carbon dioxide system, and the compressor 11 provides power to establish carbon dioxide circulation;
a helium system consists of a reactor pressure vessel 12, a reactor pressure vessel outlet pipeline 3, a helium inlet header tank 2, a helium side of a helium-carbon dioxide heat exchanger 1, a helium outlet header tank 4, a main helium fan 5 and a reactor pressure vessel inlet pipeline 6, helium is filled into the helium system, and the main helium fan 5 provides power to establish helium circulation;
after the reactor is started, the temperature of helium gas is increased after the helium gas absorbs heat in the reactor pressure vessel 12, and heat is transferred to carbon dioxide in a carbon dioxide system in the helium-carbon dioxide heat exchanger 1 through the circulation of the helium gas, so that the heat exchange of helium and carbon dioxide is completed;
the temperature of the carbon dioxide is increased after the carbon dioxide absorbs heat in the helium-carbon dioxide heat exchanger 1, high-temperature helium enters the carbon dioxide turbine 13 to do work after passing through the carbon dioxide turbine inlet pipe valve group 10, and the temperature and the pressure of the helium are reduced.
During the operation of the helium-carbon dioxide heat exchange system, the filter screen differential pressure in the helium inlet header 2 is monitored, and when the filter screen differential pressure is high, the filter screen is drawn out for cleaning. During operation of the helium-carbon dioxide heat exchange system, the differential pressure across the screen in the carbon dioxide inlet header 7 is monitored and when the differential pressure across the screen is high, the screen is pulled out for cleaning.
The high-temperature gas cooled reactor carbon dioxide power generation system adopts a 'helium-carbon dioxide' plate heat exchanger, and has simple structure, easy manufacture and good operation safety and reliability compared with a spiral tube direct-current evaporator adopted by the existing high-temperature gas cooled reactor water vapor power generation system.
The second loop utilizes carbon dioxide as a medium for flushing and converting a turbine, and has no phase change, no 'steam-water separator' and no need for starting and stopping a reactor system; a condenser, a condensate system and a circulating water system are not needed; a chemical water making system and a water and chemical feeding system are not needed; a fine processing system. The high-temperature gas cooled reactor carbon dioxide power generation system is a higher-temperature gas cooled reactor water vapor power generation system, and the system is greatly simplified.
Claims (7)
1. A helium-carbon dioxide heat exchange system is characterized by comprising a helium-carbon dioxide heat exchanger (1), a helium inlet header (2), a helium outlet header (4), a carbon dioxide inlet header (7) and a carbon dioxide outlet header (9); wherein the content of the first and second substances,
an outlet of the helium gas inlet header (2) is connected with a first inlet of the helium-carbon dioxide heat exchanger (1), a first outlet of the helium-carbon dioxide heat exchanger (1) is connected with an inlet of the helium gas outlet header (4), an outlet of the carbon dioxide inlet header (7) is connected with a second inlet of the helium-carbon dioxide heat exchanger (1), and a second outlet of the helium-carbon dioxide heat exchanger (1) is connected with an inlet of the carbon dioxide outlet header (9).
2. A helium-carbon dioxide heat exchange system according to claim 1, wherein the helium inlet header (2) is provided with a cleanable, removable screen and with differential pressure monitoring means to monitor the screen differential pressure.
3. A helium-carbon dioxide heat exchange system according to claim 1, characterized in that the carbon dioxide inlet header (7) is provided with a cleanable, removable screen and with differential pressure monitoring means to monitor the screen differential pressure, the helium-carbon dioxide heat exchanger (1) being a plate heat exchanger.
4. A helium-carbon dioxide heat exchange system according to claim 1, further comprising a primary helium fan (5), a reactor pressure vessel inlet conduit (6) and a reactor pressure vessel (12); wherein the content of the first and second substances,
the outlet of the helium outlet header (4) is connected with the inlet of the helium main blower (5), the outlet of the helium main blower (5) is connected with the inlet of the reactor pressure vessel inlet pipeline (6), the outlet of the reactor pressure vessel inlet pipeline (6) is connected with the inlet of the reactor pressure vessel (12), the outlet of the reactor pressure vessel (12) is connected with the inlet of the reactor pressure vessel outlet pipeline (3), and the outlet of the reactor pressure vessel outlet pipeline (3) is connected with the inlet of the helium inlet header (2).
5. A helium-carbon dioxide heat exchange system according to claim 4, further comprising a pressure carbon dioxide turbine outlet pipe block (8), a compressor (11), a carbon dioxide turbine inlet pipe block (10) and a carbon dioxide turbine (13); wherein the content of the first and second substances,
the outlet of the carbon dioxide outlet header (9) is connected to the inlet of a carbon dioxide turbine inlet pipe valve group (10), the outlet of the carbon dioxide turbine inlet pipe valve group (10) is connected to the inlet of a carbon dioxide turbine (13), the outlet of the carbon dioxide turbine (13) is connected to the inlet of a carbon dioxide turbine outlet pipe valve group (8), the outlet of the carbon dioxide turbine outlet pipe valve group (8) is connected to the inlet of a compressor (11), and the outlet of the compressor (11) is connected to the inlet of a carbon dioxide inlet header (7).
6. A helium-carbon dioxide heat exchange system as claimed in claim 5, characterised in that the carbon dioxide turbine outlet line block (8) contains a check valve.
7. A helium-carbon dioxide heat exchange system as claimed in claim 5, characterised in that the carbon dioxide turbine inlet pipe block (10) contains isolation and regulation valves.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364692.3U CN214303961U (en) | 2021-02-07 | 2021-02-07 | Helium-carbon dioxide heat exchange system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120364692.3U CN214303961U (en) | 2021-02-07 | 2021-02-07 | Helium-carbon dioxide heat exchange system |
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| Publication Number | Publication Date |
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| CN214303961U true CN214303961U (en) | 2021-09-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202120364692.3U Active CN214303961U (en) | 2021-02-07 | 2021-02-07 | Helium-carbon dioxide heat exchange system |
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| CN (1) | CN214303961U (en) |
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2021
- 2021-02-07 CN CN202120364692.3U patent/CN214303961U/en active Active
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