CN106409354B - A kind of passive heat derives system of open type being applied under longtime running operating mode - Google Patents
A kind of passive heat derives system of open type being applied under longtime running operating mode Download PDFInfo
- Publication number
- CN106409354B CN106409354B CN201610859142.2A CN201610859142A CN106409354B CN 106409354 B CN106409354 B CN 106409354B CN 201610859142 A CN201610859142 A CN 201610859142A CN 106409354 B CN106409354 B CN 106409354B
- Authority
- CN
- China
- Prior art keywords
- heat
- pipe
- bubble generator
- operating mode
- passive
- 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.)
- Active
Links
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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Plasma & Fusion (AREA)
- General Engineering & Computer Science (AREA)
- High Energy & Nuclear Physics (AREA)
- Structure Of Emergency Protection For Nuclear Reactors (AREA)
Abstract
The present invention provides a kind of passive heat derives system of open type being applied under longtime running operating mode, including：Heat-exchanging water tank, filter, mass flowmenter, heat exchanger, bubble generator, air accumulator, temperature sensor and other corresponding valve pipes.Compared with the passive heat derives system of tradition, the system is additionally arranged bubble generator, and the purpose of raising system exchange capability of heat is reached by way of adjusting gas injection rate according to system conditions.The present invention uses circumferential method of gas injection, the additional drag of intervention circulation loop can be effectively reduced, device is simple to operation and uniform in foaming, stable bubble flow can be obtained, help to strengthen the natural-circulation capacity of passive heat derives system, overcome the problem of system exchange capability of heat reduces and flashes flow instability under longtime running operating mode, and still maintain the passive feature of system, make passive heat derives system more safe and reliable.
Description
Technical field
It is anti-suitable for core the present invention relates to a kind of passive heat derives system of open type being applied under longtime running operating mode
Answer the cooling system of heap security technology area.
Background technology
In order to ensure the safety in operation of reactor, reactor of new generation mainly employs active and passive in the design
The security system that technology is combined.In the case of imaginary major accident, the permanently effective operation of passive safety system for
Residual heat of nuclear core is exported, ensures that the integrality of reactor core and containment shell plays vital effect.In design new one
During for containment vessel cooling system, for the passive heat derives system of open type because few with heat transfer link, system architecture is simple
Receive the concern of scholars.The system to be mainly characterized by operating pressure low, flash distillation flowing instability easily occurs, especially
Under longtime running operating mode, reduced or because the reduction of heat extraction power can further result in cooling system heat removal capacity because vibration is damaged
And fail.This safe operation to system has larger threat.Therefore, the present invention is proposed in open type natural cycle system
Using the technological means of active gas injection, to improve the continuation of natural-circulation capacity and stability, weaken caused by flow rate disturbance
Mechanical oscillation, flow system flow declines when eliminating traditional passive heat derives system longtime running, and what heat removal capacity reduced asks
Topic.
In Publication No. CN103161709 A patent document, the principal character of disclosed " a kind of bubble pump device " exists
In using the tapered vertical-lifting pipe of variable cross-section and the heat-exchange device installed in bubble generator bottom center, produced by heating
Bubble plays a part of lifting liquid.Publish within 2 months 2009《International Journal of Heat and
Fluid Flow》Volume 30 the 1st interim report《Air-lift pumps characteristics under two-phase
flow conditions》Deng in document, there is related discussion to the structure of bubble elevator pump.In these documents and patent of invention
The bubble elevator pump of proposition is not particularly suited for the passive heat derives system of open type, on the one hand whard to control using directly heating
The generation share of bubble；Another aspect insertion type structure influences whether the flowing of fluid in natural convection loop and increases loop
Resistance.If so can carry out being correspondingly improved design to bubble lift pump device, it is applied to longtime running work so as to invent one kind
The passive heat derives system of open type under condition, it will make the non-passive safety of nuclear power station protect system more safe and reliable.
The content of the invention
The invention aims to provide a kind of passive heat derives system of open type being applied under longtime running operating mode
System, it can be used for improving natural cycle system driving force and flow stability.
The object of the present invention is achieved like this：Including heat-exchanging water tank, filter, mass flowmenter, heat exchanger, gas
Be soaked generating apparatus, air accumulator, and the lower surface of the heat-exchanging water tank, which is respectively arranged with, to be risen the mouth of pipe and decline the mouth of pipe, is declined the mouth of pipe and is led to
Cross pipeline and be sequentially connected filter and heat exchanger, rise the mouth of pipe and bubble generator and heat exchange are sequentially connected by pipeline
Device, down-comer ball valve and mass flowmenter are provided with the pipeline between filter and heat exchanger, and the bubble occurs
The air inlet pipe of device connects with air accumulator, and is provided with air injection pipe flow on the pipeline between bubble generator and air accumulator
Regulating valve.
Present invention additionally comprises some such architectural features：
1. bubble generator includes outer sleeve, the porous media sleeve being arranged in outer sleeve, is arranged on outside
Annular intake pipe outside sleeve and the flange for being used to connect with corresponding pipeline for being arranged on outer sleeve both ends, the annular are entered
The clearance cavity that tracheae is formed with outer sleeve and porous media sleeve is connected.
2. the material of outer sleeve is stainless steel, porous media pipe is by polytetrafluoroethylene (PTFE) or other resistant to elevated temperatures hydrophobic materials
Sintering is formed.
Compared with prior art, the beneficial effects of the invention are as follows：The present invention uses circumferential method of gas injection, can effectively reduce
The additional drag of circulation loop is intervened, device is simple to operation and uniform in foaming, can obtain bubble flow stably, help to strengthen
The natural-circulation capacity of passive heat derives system, system exchange capability of heat under longtime running operating mode is overcome to reduce and flash flowing
The problem of unstability, and the passive feature of system is still maintained, make passive heat derives system more safe and reliable.
(1) present invention is more efficient by the way of active gas injection, and aerogenesis is uniform, and gas production is easy to control, operation
It is convenient and simple.
(2) present invention is using porous media pipe as bubble generator, and compared to common perferated thimble, its aerogenesis bubble is thin
It is small uniform.
(3) wellability of the hydrophobic property of the invention for making full use of the materials such as polytetrafluoroethylene (PTFE), water and porous media is poor,
The friction pressure drop that working medium flows through porous media sleeve is smaller, and bubble is more easy to depart from wall.
(4) present invention ensures that gas circumferentially even into porous media, avoids using circumferential annular intake method
Occurs the uneven phenomenon of aerogenesis inside runner.
(5) the porous media sleeve diameter that the present invention selects is identical with return internal diameter, compared to microwell plate and aeration head
Etc. structure, disturbance of the gas injection device to main flow is substantially reduced, avoids introducing excessive additional drag.
(6) overall structure of the present invention is simple, can eaily carry out installation, maintenance.
Brief description of the drawings
Fig. 1 is the overall structure diagram of the present invention；
Fig. 2 is bubble generator schematic diagram of the present invention；
Fig. 3 is Fig. 2 vertically diagrammatic cross-sections；
Fig. 4 is the sectional views of Fig. 2 vertically.
Fig. 5 is sectional views of the Fig. 4 along A-A directions.
Embodiment
The present invention is described in further detail with embodiment below in conjunction with the accompanying drawings.
With reference to Fig. 1-5, a kind of passive heat derives system of open type being applied under longtime running operating mode provided by the invention
System is mainly by heat-exchanging water tank 1, filter 2, down-comer ball valve 3, mass flowmenter 4, heat exchanger 6, bubble generator 7,
8, air injection pipe flow control valve 9, air accumulator 10, temperature sensor 5, drain valve 11 and other corresponding valve pipe compositions.Its
Middle heat exchanger 6 is arranged on the upstream of bubble generator, namely the bubble generator in heat exchanger added downstream, passes through
The natural-circulation capacity of system circuit is improved according to the mode of system condition change adjustment gas injection rate, it is non-so as to improve containment
The operation stability and permanently effective exchange capability of heat of active heat derives system, namely ensured system under the conditions of longtime running
Flow stability and heat removal capacity.Coupled between bubble generator and pipeline using flange, particular location can combine thermal technology
Parameter variation range determines.Heat-exchanging water tank belongs to open tank, the heat for being absorbed loop working medium by way of evaporative heat loss
It is discharged into air, and reduces even if cistern water level and can also protect all the time in water tank bottom surface with tedge and decline interface tube
The connection in system circulation loop is held, i.e., the connection in system circulation loop can be remained before water tank evaporation is dry.
The bubble generator of the present invention uses annular intake pipe, ensures gas circumferentially even into porous media.
Wherein gas injection pressure is consistently greater than the hydrostatic head of ascent stage, to avoid in cavity entering between porous media sleeve and stainless steel sleeve
Enter liquid, shorten effective aerogenesis section.Bubble generator is the key of design and installation of the present invention, and both ends pass through flange and loop
It is connected, it has collectively constituted the ascent stage of circulation loop with heat exchanger, round pipe.Bubble generator is by porous media pipe
7 and outer sleeve 8, annular intake pipe, flange composition.Porous media pipe 7 is placed in outer sleeve 8, in porous media pipe and outside
Annular gap cavity (air cavity) between portion's sleeve be present, annular intake pipe is connected with annular air cavity, and required gas is by air accumulator
There is provided.Porous media bore is identical with the internal diameter of connecting pipe, will not fluid flow generation disturbance.Porous media pipe can be by
Polytetrafluoroethylene (PTFE) or other high temperature resistant hydrophobic materials sintering form, and outer sleeve is using stainless steel.In porous media
Chamber is flow channel for liquids, and internal diameter is identical with ascent stage internal diameter of the pipeline, and porous media has hydrophobic property, can at utmost be reduced
The local losses of fluid flow through porous media inner chamber.A ring cavity between porous media sleeve and stainless steel sleeve be present,
Air enters ring cavity by air inlet pipe, because gas injection pressure is larger, air flows through porous media, and is broken into by porous media
Tiny, uniform bubble, the less biphase gas and liquid flow of density is formed after being mixed with the liquid in runner.Finally, in the ascent stage and
Under the driving of descending branch density contrast, the effect of enhancing Natural Circulation driving force is realized.
When station blackout accident occurs, using passive heat derives system (the PCS systems of the containment of passive technology
System) start to start, the long-term refrigerating function of containment is realized using natural circulation.As shown in figure 1, the passive heat of tradition
Guiding system generally includes to be arranged on the heat exchanger 6 inside containment, and is handed over by tedge and down-comer with the heat
What parallel operation 6 was connected is arranged on the heat-exchanging water tank 1 outside containment.Working medium expanded by heating in heat exchanger flows up, and enters
Heat-exchanging water tank 1, the higher working medium of low temperature, density flows to heat exchanger 6 along down-comer and exchanged heat again after cooling, what whole process relied on
It is that cold and hot section of density contrast realizes that Natural Circulation completes heat derives function.Research shows, the lower heat exchanging of heat-exchanging water tank temperature
The power influence of system is more obvious, and it is lower, and containment heat derives system power is higher.And under longtime running operating mode,
With the rise of Temperature of Working in the reduction of containment heat release power and tedge, circulation loop driving force is gradually reduced, and
And it can occur to flash flow instability in the ascent stage.This flow instability can produce strong mechanical oscillation to system,
Safe operation of the stress damage being generated by it for system has larger threat, and system off heat ability also can be therefore bright
It is aobvious to weaken.Therefore the present invention sets bubble generator 7,8 in the downstream of ascent stage heat exchanger 6, the change according to operating condition
Change and adjust gas injection rate using flow control valve 9.The introducing of gas reduces local local static pressure, and flass can occur in advance,
So as to increase the length of two-phase section in tedge, make the driving force of natural convection loop strengthen, ensured under longtime running operating mode
The validity and security of passive heat derives system.
Claims (2)
- A kind of 1. passive heat derives system of open type being applied under longtime running operating mode, it is characterised in that：Including heat-exchanging water Case, filter, mass flowmenter, heat exchanger, bubble generator, air accumulator, the lower surface difference of the heat-exchanging water tank It is provided with and rises the mouth of pipe and decline the mouth of pipe, declines the mouth of pipe and filter and heat exchanger are sequentially connected by pipeline, rise the mouth of pipe Bubble generator and heat exchanger are sequentially connected by pipeline, are provided with the pipeline between filter and heat exchanger Down-comer ball valve and mass flowmenter, the air inlet pipe of the bubble generator connect with air accumulator, and in bubble generator Air injection pipe flow control valve is provided with pipeline between air accumulator；Bubble generator includes outer sleeve, is arranged on outside Porous media sleeve in portion's sleeve, the annular intake pipe being arranged on outside outer sleeve and the use for being arranged on outer sleeve both ends In the clearance cavity phase that the flange connected with corresponding pipeline, the annular intake pipe are formed with outer sleeve and porous media sleeve Connection.
- 2. a kind of passive heat derives system of open type being applied under longtime running operating mode described in a claim 1, it is special Sign is：The material of outer sleeve is stainless steel, and porous media sleeve is by polytetrafluoroethylene (PTFE) or other resistant to elevated temperatures hydrophobic materials Sintering is formed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859142.2A CN106409354B (en) | 2016-09-28 | 2016-09-28 | A kind of passive heat derives system of open type being applied under longtime running operating mode |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610859142.2A CN106409354B (en) | 2016-09-28 | 2016-09-28 | A kind of passive heat derives system of open type being applied under longtime running operating mode |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106409354A CN106409354A (en) | 2017-02-15 |
| CN106409354B true CN106409354B (en) | 2018-01-19 |
Family
ID=58015698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610859142.2A Active CN106409354B (en) | 2016-09-28 | 2016-09-28 | A kind of passive heat derives system of open type being applied under longtime running operating mode |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106409354B (en) |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107369481B (en) * | 2017-07-18 | 2019-08-23 | 上海交通大学 | Bubble reactor test device |
| CN109903862A (en) * | 2019-02-20 | 2019-06-18 | 哈尔滨工程大学 | A kind of low pressure natural-circulation capacity lifting scheme |
| CN112307626B (en) * | 2020-11-02 | 2021-09-03 | 西安交通大学 | Operation and influence analysis method for multiple groups of passive heat export systems in containment |
| CN113539528A (en) * | 2021-07-30 | 2021-10-22 | 长江勘测规划设计研究有限责任公司 | Passive circulating cooling system of underground nuclear power station and using method thereof |
| CN113948228B (en) * | 2021-09-17 | 2024-07-12 | 中广核研究院有限公司 | Heat exchange system and heat exchange device thereof |
| CN113926352A (en) * | 2021-10-29 | 2022-01-14 | 四川大学华西医院 | Microbubble preparation instrument and microbubble preparation method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH088856B2 (en) * | 1993-05-21 | 1996-01-31 | 麒麟麦酒株式会社 | Airlift reactor for fed-batch culture |
| CN1272090C (en) * | 2004-10-15 | 2006-08-30 | 清华大学 | Air bubble circulation flow type hollow fibrous membrane separating device |
| CN103426486B (en) * | 2013-08-06 | 2015-12-30 | 华北电力大学 | Natural Circulation multifunctional gas lifting apparatus |
| US9366112B2 (en) * | 2014-04-23 | 2016-06-14 | Shell Oil Company | Subsea production cooler with gas lift |
| CN104200853B (en) * | 2014-09-16 | 2017-03-15 | 中国科学院合肥物质科学研究院 | A kind of slice type liquid heavy metal natural circulating device |
| CN104681108B (en) * | 2014-12-03 | 2017-03-29 | 中国科学院合肥物质科学研究院 | Passive natural circulation consolidation system and method after a kind of liquid-metal cooled reactor defluidization |
-
2016
- 2016-09-28 CN CN201610859142.2A patent/CN106409354B/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| CN106409354A (en) | 2017-02-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106409354B (en) | A kind of passive heat derives system of open type being applied under longtime running operating mode | |
| CN106229017B (en) | A kind of two-phase flow device for system natural-circulation capacity Study of Lifting | |
| CN103400608B (en) | A kind of Heat Discharging System of Chinese for MSR | |
| Cao et al. | Study on reduction of pressure oscillation in low-velocity steam jet condensation | |
| CN102822902A (en) | Compact nuclear reactor with integral steam generator | |
| CN107170493A (en) | A kind of passive containment thermal conduction system | |
| CN113035387A (en) | PCS (Power distribution System) long-term cooling water tank capable of operating efficiently | |
| CN112768098B (en) | Experimental device and method for researching jet impact characteristics of reactor core outlet of fast reactor | |
| CN207097468U (en) | A kind of device for improving the dead pipeline section phenomenon of nuclear power plant by Natural Circulation | |
| CN103730172B (en) | Auxiliary heating system in a kind of liquid heavy metal cooling natural circulation bath-type reactor | |
| CN219976361U (en) | Ascending pipe heat exchange system taking liquid metal as working medium | |
| CN205230604U (en) | Heat transfer system is reinforceed in cold and hot circulation of nuclear power containment | |
| CN103730171B (en) | A kind of liquid heavy metal cooling natural circulation bath-type reactor auxiliary heating system | |
| CN110106547A (en) | Improve the device of pulling of crystals pulling rate | |
| CN108932984A (en) | A kind of two-fluid fused salt fast reactor overflow can system and its control method | |
| CN213400579U (en) | Passive cooling device for containment | |
| CN110826247B (en) | Simulation method for characteristics of gravity type passive safety injection equipment of nuclear reactor | |
| CN207620959U (en) | A kind of hydraulic turbine water guide oil basin protection negative pressure eliminating device | |
| CN209214114U (en) | A kind of Waste Heat Reuse heat pump hot-water system | |
| CN206073547U (en) | A kind of energy-saving type high-temperature safety line is vented chiller | |
| CN206724295U (en) | A kind of heating electric heater | |
| Wang | Effect of shaft speed on performance of magnetic fluid seal with gas isolation for sealing water | |
| CN110849205A (en) | Water-cooling constant-pressure liquid supplementing water tank system and application method thereof | |
| RU2313143C1 (en) | Nuclear power plant | |
| CN212864675U (en) | Asphalt cooling heat exchange device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |