CN107170493A - A kind of passive containment thermal conduction system - Google Patents
A kind of passive containment thermal conduction system Download PDFInfo
- Publication number
- CN107170493A CN107170493A CN201710285748.4A CN201710285748A CN107170493A CN 107170493 A CN107170493 A CN 107170493A CN 201710285748 A CN201710285748 A CN 201710285748A CN 107170493 A CN107170493 A CN 107170493A
- Authority
- CN
- China
- Prior art keywords
- containment
- heat exchanger
- heat
- circulation line
- coolant
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
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Classifications
-
- G—PHYSICS
- G21—NUCLEAR PHYSICS; NUCLEAR ENGINEERING
- G21C—NUCLEAR REACTORS
- G21C15/00—Cooling arrangements within the pressure vessel containing the core; Selection of specific coolants
- G21C15/18—Emergency cooling arrangements; Removing shut-down heat
-
- 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
- Y02E30/30—Nuclear fission reactors
Abstract
The invention belongs to nuclear safety control technology field, it is related to a kind of passive containment thermal conduction system.Described heat derives system includes containment and heat derives component, and heat derives component includes the external tank for coolant of containment, circulation line, heat exchanger group, mixed gas mozzle, air trapping case；Heat exchanger group is arranged in containment, including heat exchanger tube, heat exchanger group coolant inlet, heat exchanger group cooling liquid outlet；Circulation line is divided to two sections；The external tank for coolant of containment is arranged on outside containment, and set location is higher than heat exchanger group；Mixed gas mozzle is arranged in containment, both ends open, and its at least one section is in contact with least one section of heat exchanger tube by contact surface；Air trapping case is arranged on the lower space of containment, is provided with perforate.Using the heat derives system of the present invention, the heat derives efficiency of passive containment thermal conduction system can be improved by improving condensation heat transfer efficiency.
Description
Technical field
The invention belongs to nuclear safety control technology field, it is related to a kind of passive containment thermal conduction system.
Background technology
Containment is that PWR nuclear power plant prevents last one of barrier of radioactive fission substance release, it is ensured that containment
Integrality is most important in design of nuclear power plant.Conventional pressurized water heap nuclear power plant is various using active containment spray system control
Containment pressure and temperature under accident conditions, so as to maintain the integrality of containment.
However, in the case of the beyond design basis accident such as power supply outside the venue is lost, active containment spray system can not work
Make.Therefore, employ passive technology to export inside containment in increasing new reactor design in recent years
Heat.For example the AP600/1000 reactors of Westinghouse Electric's exploitation are using the annular space between steel containment vessel and shielding factory building
Internal air flows naturally and the mode of steel containment vessel outer surface liquid film evaporation exports containment internal heat.And for example this Shen
The Application No. CN 201110437864.6 asked someone the first patent application of China also discloses that passive containment heat derives system
System, the cooling water that the system includes being arranged in the heat exchanger group inside containment, the heat exchanger tube of heat exchanger group passes through and safety
Temperature rises after high-temperature gas mixture body heat in shell is exchanged, and circulation line of the cooling water that temperature rises through heat exchanger group is passed
Lead, be cooled again with the cooling water progress heat exchange being arranged in the heat-exchanging water tank outside containment.This non-passive safety
The main thermal conduction mechanism of shell heat derives system is condensation of the vapor in containment in mixed gas in heat exchange pipe surface.
But, when there is non-condensable gas (during such as air and major accident issuable in mixed gas in containment
Hydrogen, carbon monoxide etc.) in the presence of, the condensation heat transfer ability of vapor can be seriously impaired.There is data to show, for
The mixed gas of vapor and air, when wherein air quality fraction is only 0.5%, will cause under Natural Convection Conditions
Condensation coefficient reduction by 50%.Therefore, for above-mentioned passive containment thermal conduction system, if heat exchanger can be reduced effectively
Non-condensable gas content around group, then can effectively lift condensation heat transfer ability, improve passive containment heat derives system
System performance.
The content of the invention
The primary and foremost purpose of the present invention is to provide a kind of passive containment thermal conduction system, with by improving condensation heat transfer
Efficiency and the heat derives efficiency for improving passive containment thermal conduction system.
In order to achieve this, in the embodiment on basis, the present invention provides a kind of passive containment heat derives system
System, described heat derives system includes containment and heat derives component, and described heat derives component is included outside containment
Tank for coolant, circulation line, heat exchanger group, mixed gas mozzle, air trapping case are put,
Described heat exchanger group is arranged in described containment, including heat exchanger tube, heat exchanger group coolant inlet, heat exchange
Device group cooling liquid outlet, for the peace by being imported in the coolant in described heat exchanger tube and described mixed gas mozzle
The containment air imported in the heat exchange of full shell air, the described mixed gas mozzle of cooling,
The external tank for coolant of containment described in the connection of one section one end that described circulation line is divided in two sections, two sections,
The described heat exchanger group coolant inlet of other end connection；The containment described in the connection of another section one end in two sections is external cold
But liquid case, the described heat exchanger group cooling liquid outlet of other end connection, the described containment of circulation line connection described in two sections
The position of external tank for coolant is different,
The external tank for coolant of described containment is arranged on outside described containment, and set location is higher than described heat exchange
Device group, so that the coolant wherein contained can flow into described heat exchanger group by Action of Gravity Field by described circulation line
In heat exchanger tube, and flow back to the described external tank for coolant of containment by described circulation line after the heat exchange,
Described mixed gas mozzle is arranged in described containment, both ends open, and upper end open is towards described
The upper space of containment, lower ending opening is stretched into described air trapping case, and at least the one of described mixed gas mozzle
Section is in contact with least one section of described heat exchanger tube by contact surface,
Described air trapping case is arranged on the lower space of described containment, is provided with perforate, described opens
Hole is used to keep described air trapping case and the pressure balance in the described other regions of containment.
In a preferred embodiment, the present invention provides a kind of passive containment thermal conduction system, wherein institute
The heat derives component stated is one or more groups of.
In a preferred embodiment, the present invention provides a kind of passive containment thermal conduction system, wherein institute
The circulation line stated is connected by heat exchange tube inlet header with described heat exchanger group coolant inlet.
In a preferred embodiment, the present invention provides a kind of passive containment thermal conduction system, wherein institute
The circulation line stated is connected by heat exchanger tube outlet header with described heat exchanger group cooling liquid outlet.
In a preferred embodiment, the present invention provides a kind of passive containment thermal conduction system, wherein institute
The circulation line stated is divided into circulation line descending branch and circulation line ascent stage,
Described circulation line declines fragment position and is less than described circulation line ascent stage, the described safety of its one end connection
The external tank for coolant of shell, the described heat exchanger group coolant inlet of other end connection；
The described external tank for coolant of containment of described circulation line ascent stage one end connection, the other end connects described
Heat exchanger group cooling liquid outlet.
In a preferred embodiment, the present invention provides a kind of passive containment thermal conduction system, wherein institute
Valve is provided with the circulation line descending branch stated, described valve is closed during normal operation in nuclear power plant.
In a preferred embodiment, the present invention provides a kind of passive containment thermal conduction system, wherein institute
The mixed gas mozzle stated being arranged in described containment uprightly.
In a preferred embodiment, the present invention provides a kind of passive containment thermal conduction system, wherein institute
The cross section of the heat exchanger tube stated and described mixed gas mozzle is rectangle, and described contact surface is rectangle.
In a preferred embodiment, the present invention provides a kind of passive containment thermal conduction system, wherein institute
The coolant stated is cooling water.
The beneficial effects of the present invention are, can be by carrying using the passive containment thermal conduction system of the present invention
High condensation heat transfer efficiency and the heat derives efficiency for improving passive containment thermal conduction system.The present invention is by will be passive
The non-condensable gas such as the air of containment heat derives system heat exchanger tube region are transported under containment with passive principle
The mode in portion space, reduces the non-condensable gas content of passive containment thermal conduction system heat exchanger tube region, from
And improve the condensation heat transfer efficiency of passive containment thermal conduction system.
Brief description of the drawings
Fig. 1 is the composition schematic diagram of exemplary passive containment thermal conduction system of the invention.
Fig. 2 is heat exchanger tube and mixed gas mozzle in exemplary passive containment thermal conduction system of the invention
The schematic diagram of contact surface.
Fig. 3 is heat exchanger tube and mixed gas mozzle in exemplary passive containment thermal conduction system of the invention
The schematic diagram of possible fit system.
Fig. 4 is the operation logic schematic diagram of exemplary passive containment thermal conduction system of the invention.
Embodiment
The embodiment of the present invention is further illustrated below in conjunction with accompanying drawing.
Exemplary passive containment thermal conduction system of the invention as shown in figure 1, including：Containment 21 and multigroup
Heat derives component, wherein every group of heat derives component includes the external cooling water tank 1 of containment, circulation line descending branch 2, changed
Heat pipe influent header 3, heat exchanger tube outlet header 5, circulation line ascent stage 6, mixed gas mozzle 7, air trapping case 8, valve
Door 10, heat exchanger group 22.
Heat exchanger group 22 is arranged in containment 21, including heat exchanger tube 4, heat exchanger group cooling water inlet, heat exchanger group are cold
But water out, is handed over for the heat by the containment air imported in the cooling water in heat exchanger tube 4 and mixed gas mozzle 7
Change, the containment air imported in cooling mixed gas mozzle 7.
The position of circulation line descending branch 2 is less than the circulation line ascent stage 6, and its one end connects the external cooling water tank 1 of containment,
The other end connects heat exchanger group cooling water inlet by heat exchange tube inlet header 3.Valve is provided with circulation line descending branch 2
10, valve 10 is closed during normal operation in nuclear power plant.
One end connection of the circulation line ascent stage 6 external cooling water tank 1 of containment, the other end passes through heat exchanger tube outlet header 5
Connect heat exchanger group coolant outlet.
Circulation line descending branch 2 is different with the position that the circulation line ascent stage 6 connects the external cooling water tank 1 of containment.
The external cooling water tank 1 of containment is arranged on outside containment 21, and set location is higher than heat exchanger group 22, so that wherein
The cooling water contained can by Action of Gravity Field by the heat exchanger tube 4 in the inflow heat exchanger group 22 of circulation line descending branch 2, and
The external cooling water tank 1 of containment is flowed back to by the circulation line ascent stage 6 after heat exchange.
Mixed gas mozzle 7 is upright to be arranged in containment 21, both ends open, and upper end open is towards containment 21
Upper space, lower ending opening is stretched into air trapping case 8.
As shown in Fig. 2 at least one section of mixed gas mozzle 7 is connected with least one section of heat exchanger tube 4 by contact surface 9
Touch, other surfaces of heat exchanger tube 4 and be partially exposed in containment air.As shown in figure 3, when mixed gas mozzle 7 and changing
When the cross section of heat pipe 4 is rectangle, their contact surface 9 is also rectangle, and now other faces 12,13,14 of heat exchanger tube 4 expose
In containment air.
Air trapping case 8 is arranged on the lower space of containment 21, is provided with perforate 11, and perforate 11 is used to keep empty
Gas hold-up tank 8 and the pressure balance in the other regions of containment 21.
The operation logic of the passive containment thermal conduction system of the invention of above-mentioned example is as shown in Figure 4.
When there is cut accident in nuclear power plant, a large amount of vapor (including the non-condensable gas such as hydrogen during major accident)
Into containment 21, cause the increasing temperature and pressure of containment 21.It is cold in now operator's Open valve 10, containment external water tank 1
But water enters cooling water in heat exchanger tube 4, heat exchanger tube 4 through circulation line descending branch 2 and heat exchange tube inlet header 3 and passes through contact surface
9 coolings enter the containment air of mixed gas mozzle 7, big by the containment where other surface cooling heat transferring pipes 4
The air in space.Cooling water in heat exchanger tube 4 under the effect of passive natural principle, is exported through heat exchanger tube and joined so as to be heated
Case 5 and circulation line ascent stage 6 are returned in containment external water tank 1.The containment entered in mixed gas mozzle 7 is big
Gas condenses through the cooling in heat exchanger tube 4, vapor in the inner surface of mixed gas mozzle 7, air and other non-condensable gas
By in the air inlet hold-up tank 8 of mixed gas mozzle 7, so that reduce the place containment large space of heat exchanger tube 4 can not
Solidifying gas content.Air trapping case 8 is connected with the other regions of containment by perforate 11 so that air trapping during system operation
The pressure of case 8 and the pressure balance in the other regions of containment, so as to ensure that the gas that is cooled in mixed gas mozzle 7 can be with
It is injected into always in air trapping case 8.
In summary, the passive containment heat derives system of condensation heat transfer efficiency can be improved the invention provides a kind of
System.
Obviously, those skilled in the art can carry out the essence of various changes and modification without departing from the present invention to the present invention
God and scope.So, if these modifications and variations to the present invention belong to the model of the claims in the present invention and its equivalent technology
Within enclosing, then the present invention is also intended to comprising including these changes and modification.Above-described embodiment or embodiment are simply to the present invention
For example, the present invention can also be implemented with other ad hoc fashions or other particular form, without departing from the present invention's
Main idea or substantive characteristics.Therefore, it is regarded as from the point of view of the embodiment of description is in terms of any illustrative and non-limiting.This
The scope of invention should be illustrated that any change equivalent with the intention and scope of claim should also be included by appended claims
Within the scope of the invention.
Claims (9)
1. a kind of passive containment thermal conduction system, it is characterised in that：Described heat derives system include containment and
Heat derives component, described heat derives component includes the external tank for coolant of containment, circulation line, heat exchanger group, mixing
Gas diversion tube, air trapping case,
Described heat exchanger group is arranged in described containment, including heat exchanger tube, heat exchanger group coolant inlet, heat exchanger group
Cooling liquid outlet, for the containment by being imported in the coolant in described heat exchanger tube and described mixed gas mozzle
The containment air imported in the heat exchange of air, the described mixed gas mozzle of cooling,
The external tank for coolant of containment described in the connection of one section one end that described circulation line is divided in two sections, two sections, it is another
Hold the heat exchanger group coolant inlet described in connection；The external coolant of containment described in the connection of another section one end in two sections
Case, the described heat exchanger group cooling liquid outlet of other end connection, the containment described in circulation line connection described in two sections is external
The position of tank for coolant is different,
The external tank for coolant of described containment is arranged on outside described containment, and set location is higher than described heat exchanger
Group, so that the coolant wherein contained can be flowed into described heat exchanger group by Action of Gravity Field by described circulation line
Heat exchanger tube, and flow back to the described external tank for coolant of containment by described circulation line after the heat exchange,
Described mixed gas mozzle is arranged in described containment, both ends open, and upper end open is towards described safety
The upper space of shell, lower ending opening is stretched into described air trapping case, at least one section of described mixed gas mozzle with
At least one section of described heat exchanger tube is in contact by contact surface,
Described air trapping case is arranged on the lower space of described containment, is provided with perforate, and described perforate is used
Pressure balance in the air trapping case described in holding Yu the described other regions of containment.
2. heat derives system according to claim 1, it is characterised in that：Described heat derives component is one group or many
Group.
3. heat derives system according to claim 1, it is characterised in that：Described circulation line passes through heat exchange tube inlet
Header is connected with described heat exchanger group coolant inlet.
4. heat derives system according to claim 1, it is characterised in that：Described circulation line is exported by heat exchanger tube
Header is connected with described heat exchanger group cooling liquid outlet.
5. heat derives system according to claim 1, it is characterised in that：Described circulation line is divided under circulation line
Section and circulation line ascent stage drop,
Described circulation line declines fragment position and is less than outside described circulation line ascent stage, the described containment of its one end connection
Put tank for coolant, the described heat exchanger group coolant inlet of other end connection；
The described external tank for coolant of containment of described circulation line ascent stage one end connection, the described heat exchange of other end connection
Device group cooling liquid outlet.
6. heat derives system according to claim 5, it is characterised in that：It is provided with described circulation line descending branch
Valve.
7. heat derives system according to claim 1, it is characterised in that：Described mixed gas mozzle setting uprightly
Put in described containment.
8. heat derives system according to claim 1, it is characterised in that：Described heat exchanger tube and described mixed gas
The cross section of mozzle is rectangle, and described contact surface is rectangle.
9. heat derives system according to claim 1, it is characterised in that：Described coolant is cooling water.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710285748.4A CN107170493B (en) | 2017-04-27 | 2017-04-27 | Passive containment heat exporting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710285748.4A CN107170493B (en) | 2017-04-27 | 2017-04-27 | Passive containment heat exporting system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107170493A true CN107170493A (en) | 2017-09-15 |
| CN107170493B CN107170493B (en) | 2020-12-18 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710285748.4A Active CN107170493B (en) | 2017-04-27 | 2017-04-27 | Passive containment heat exporting system |
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| CN (1) | CN107170493B (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533474A (en) * | 2018-01-22 | 2018-09-14 | 江苏唐宁服饰有限公司 | Air-jet loom compressed air cooling system |
| CN112053791A (en) * | 2020-09-15 | 2020-12-08 | 哈尔滨工程大学 | Non-time-limit passive combined heat removal system with integrated heat release trap |
| CN113035400A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Passive high-efficient heat exchanger of sparse membrane formula containment |
| CN113035396A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Double-wheel double-blade composite power air blowing type efficient heat exchanger built in containment |
| CN113035397A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Containment built-in efficient heat exchanger adopting tangential type air suction system |
| CN113035386A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Containment built-in efficient heat exchanger adopting double-wheel double-blade composite power air suction type |
| CN113035393A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Self-driven air extraction type passive containment heat removal system |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108533474A (en) * | 2018-01-22 | 2018-09-14 | 江苏唐宁服饰有限公司 | Air-jet loom compressed air cooling system |
| CN112053791A (en) * | 2020-09-15 | 2020-12-08 | 哈尔滨工程大学 | Non-time-limit passive combined heat removal system with integrated heat release trap |
| CN113035400A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Passive high-efficient heat exchanger of sparse membrane formula containment |
| CN113035396A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Double-wheel double-blade composite power air blowing type efficient heat exchanger built in containment |
| CN113035397A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Containment built-in efficient heat exchanger adopting tangential type air suction system |
| CN113035386A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Containment built-in efficient heat exchanger adopting double-wheel double-blade composite power air suction type |
| CN113035393A (en) * | 2021-03-05 | 2021-06-25 | 哈尔滨工程大学 | Self-driven air extraction type passive containment heat removal system |
| CN113035393B (en) * | 2021-03-05 | 2022-11-18 | 哈尔滨工程大学 | Self-driven air extraction type passive containment heat removal system |
| CN113035397B (en) * | 2021-03-05 | 2023-10-27 | 哈尔滨工程大学 | Safety shell built-in efficient heat exchanger adopting cutting and striking type air suction system |
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