CN102563999A - Passive natural circulation cooling system - Google Patents
Passive natural circulation cooling system Download PDFInfo
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- CN102563999A CN102563999A CN201210014871XA CN201210014871A CN102563999A CN 102563999 A CN102563999 A CN 102563999A CN 201210014871X A CN201210014871X A CN 201210014871XA CN 201210014871 A CN201210014871 A CN 201210014871A CN 102563999 A CN102563999 A CN 102563999A
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- heat exchange
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Abstract
The invention discloses a passive natural circulation cooling system, and relates to a system for heat exchange cooling without depending on external power of a water pump and the like. The whole system does not depend on the external power, and only depends on the gravity effect of water to carry out natural circulation heat exchange. The water in a water storage tank enters a distribution header by means of gravity through a declining pipe, and the water in the distribution header is positioned in a high-pressure area and is in a sub-cooled state; and the working medium water flows to a heat exchange ascending surface to absorb external heat so as to form natural circulation. The water in a heat exchange pipe rises by absorbing heat, enters a spraying heat exchange through a collection header and the outlet of a water conduit and finally refluxes to the water storage tank. The system works without depending on the external power, and the heat exchange capacity of the system is improved together with increment of external temperature; and the system has the advantages of simple structure, convenience in maintenance and overhauling and the like, is easy to manufacture, and is particularly suitable for emergency heat exchange cooling systems in the fields of nuclear power plant reactors, coal gasifiers and the like.
Description
Technical field
The present invention relates to a kind of natural circulation cooling system, particularly a kind of heat exchange cooling system that does not need exterior power belongs to the heat transmission equipment technical field.
Background technology
Extensively exist the working environment of HTHP in the modern industry device, like nuclear power plant reactor, coal gasifier etc.At present, the HTHP workpiece on the engineering all moves in the environment of a sealing, and outside its system, arranges a containment that has cooling system.When the HTHP workpiece occurs when unusual, the cooling system of its outer containment is started working whole system is cooled off, and preventing blast and revealing and wait more serious disaster.But; Present containment cooling system generally all needs electric power or other external force to drive, if in fact earthquake takes place, during burst accidents such as blast; The power system of cooling system also can be destroyed; Thereby cause cooling system normally to move, can not the HTHP working environment that has had an accident be cooled off, cause bigger disaster.In March, 2011 for example; The blast leakage accident of Fukushima, Japan nuclear power station is exactly because serious damage is suffered in the power system of cooling system after earthquake; The cooling nuclear reactor that can't run well causes the reactor core temperature to raise at last, blasts and has caused nuclear leakage.
In order to solve under great burst accident, thereby impaired can't the normal operation of the power system of containment cooling device causes the more problem of calamity, presses for a kind of external motivating force that do not need, rely on self just can be normally the effective cooling system of operation.The present invention proposes a kind of non-active natural circulation cooling system, it is characterized in that disobeying outer boundary power, only relies on the self gravitation effect of water to carry out the system that heat exchange is cooled off.Compare with traditional cooling system, native system has disobeys outer boundary power, simple in structure; Easy to manufacture, advantages such as Maintenance and Repair convenience are particularly useful for nuclear power plant reactor; The accident emergency heat exchange cooling system in fields such as coal gasifier satisfies needs of production.
Summary of the invention
The objective of the invention is in existing commercial plant on power-actuated cooling system basis; Can't run well for the power system that solves cooling device under great burst accident is impaired; Thereby the more problem of calamity takes place, propose a kind of non-active natural circulation cooling system.
Technical scheme of the present invention is following:
A kind of non-active natural circulation cooling system is characterized in that: this system comprises open type storage tank, down-comer, distribution header, the heat-transfer surface that rises, compiles header, aqueduct and spray heat exchanger; Said down-comer top links to each other with open type storage tank bottom, and the down-comer bottom links to each other with distributing the header inlet; Rising heat-transfer surface bottom links to each other with distributing the header outlet, rising heat-transfer surface top with compile header and enter the mouth and link to each other; Compiling the header outlet is connected with the spray heat exchanger through aqueduct; Open type storage tank and down-comer are arranged in the atmospheric environment, and the rising heat-transfer surface is arranged in the thermal environment, and the spray heat exchanger is positioned at open type storage tank water surface top.
It is 5～15m that the difference in height of rising heat-transfer surface according to the invention is chosen scope, the vertical or inclination in its top.The spray heat exchanger is 0.2m～0.5m apart from water surface elevation in the open type storage tank.
Distribute header to be arranged in the thermal environment or in the atmospheric environment; Compiling header is arranged in the thermal environment or in the atmospheric environment.
The top of open type storage tank and atmosphere, the water quality requirement in the open type storage tank is: pH value scope 7～9.5, Mg
2+Mass concentration＜0.39g/L, Ca
2+Mass concentration＜6.17 * 10
-3G/L, anti-sealing produces scale formation in the whole circulation heat transfer process.
The present invention compares with the prior art scheme and has the following advantages and the high-lighting effect: 1. only rely on the self gravitation effect operation of water, do not need driving forces such as extraneous electric power, reliability is high, has reduced the risk that cooling system can't normally move; 2. adopt open tank, top and atmosphere, attended operation is convenient simple and easy; 3. system carries out water treatment, has prevented the scale formation that produces in the cycle heat exchange process, and is safe and reliable.
Description of drawings
Fig. 1 is a kind of non-active Natural Circulation cooling sketch map.
The 1-thermal source; The 2-thermal environment; 3-open type storage tank; The 4-down-comer; 5-distributes header; 6-rising heat-transfer surface; 7-compiles header; The 8-aqueduct; 9-sprays heat exchanger.
The specific embodiment
Further specify principle of the present invention, concrete structure and preferred forms below in conjunction with accompanying drawing.
Fig. 1 is a kind of non-active natural circulation cooling system, and this system comprises open type storage tank 3, down-comer 4, distribution header 5, rising heat-transfer surface 6, compiles header 7, aqueduct 8 and spray heat exchanger 9.Said down-comer top links to each other with open type storage tank bottom, and the down-comer bottom links to each other with distributing the header inlet; Rising heat-transfer surface bottom links to each other with distributing the header outlet, rising heat-transfer surface top with compile header and enter the mouth and link to each other; Compiling the header outlet is connected with spray heat exchanger 9 through aqueduct 8; Open type storage tank and down-comer are arranged in the atmospheric environment, and the rising heat-transfer surface is arranged in the thermal environment 2, and spray heat exchanger 9 is positioned at open type storage tank water surface top.
It is 5～15m that the discrepancy in elevation of this system's rising heat-transfer surface is chosen scope, the vertical or inclination in its top; The spray heat exchanger is 0.2m～0.5m apart from water surface elevation in the open type storage tank; Water quality requirement in the open type storage tank generally should be: pH value scope 7～9.5, Mg
2+Mass concentration＜0.39g/L, Ca
2+Mass concentration＜6.17 * 10
-3G/L, anti-sealing produces scale formation in the whole circulation heat transfer process.Distribute header 5 and compile header 7 and can be arranged in the thermal environment or in the atmospheric environment.
Water in the storage tank relies on self gravitation to get in the down-comer, gets into and distributes header, distributes the header middle water level to be positioned at the higher-pressure region, is in supercooled state; Working-medium water flows to the external heat that absorbs heat in the heat exchange raised floor, forms Natural Circulation.Water in the heat exchanger tube absorbs heat and rises, and gets into the spray heat exchanger through compiling the outlet of header and aqueduct, and finally is back to formation circulation in the storage tank.
Contrast traditional heat exchange cooling system; This system adopts open type storage tank, down-flow pipe, distribution header, the heat-transfer surface that rises, compiles the heat exchange cooling system that header, aqueduct and spray heat exchanger are formed; Do not need electric power only to rely on the self gravitation effect of water; Have characteristics such as simple in structure, easy to manufacture and reliable, effectively satisfied needs of production.
Claims (6)
1. non-active natural circulation cooling system; It is characterized in that: this system comprises open type storage tank (3), down-comer (4), distribution header (5), rising heat-transfer surface (6), compiles header (7), aqueduct (8) and spray heat exchanger (9); Said down-comer (4) top links to each other with open type storage tank (3) bottom, and down-comer (4) bottom links to each other with distributing header (5) inlet; Rising heat-transfer surface (6) bottom links to each other with distributing header (5) outlet, rising heat-transfer surface (6) top with compile header (7) and enter the mouth and link to each other; Compiling header (7) outlet is connected with spray heat exchanger (9) through aqueduct (8); Open type storage tank (3) and down-comer (4) are arranged in the atmospheric environment, and rising heat-transfer surface (6) is arranged in the thermal environment (2), and spray heat exchanger (9) is positioned at open type storage tank (3) water surface top.
2. non-active natural circulation cooling system as claimed in claim 1 is characterized in that: it is 5～15m that the difference in height of said rising heat-transfer surface is chosen scope, the vertical or inclination in its top.
3. according to claim 1 or claim 2 non-active natural circulation cooling system, it is characterized in that: the spray heat exchanger is 0.2m～0.5m apart from water surface elevation in the open type storage tank.
4. non-active natural circulation cooling system as claimed in claim 1, it is characterized in that: the water quality requirement in the open type storage tank is: pH value scope 7～9.5, Mg
2+Mass concentration＜0.39g/L, Ca
2+Mass concentration＜6.17 * 10
-3G/L.
5. non-active natural circulation cooling system as claimed in claim 1 is characterized in that: distribute header to be arranged in the thermal environment or in the atmospheric environment.
6. non-active natural circulation cooling system as claimed in claim 1 is characterized in that: compile header and be arranged in the thermal environment or in the atmospheric environment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210014871.XA CN102563999B (en) | 2012-01-17 | 2012-01-17 | Passive natural circulation cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210014871.XA CN102563999B (en) | 2012-01-17 | 2012-01-17 | Passive natural circulation cooling system |
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| Publication Number | Publication Date |
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| CN102563999A true CN102563999A (en) | 2012-07-11 |
| CN102563999B CN102563999B (en) | 2014-06-04 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201210014871.XA Active CN102563999B (en) | 2012-01-17 | 2012-01-17 | Passive natural circulation cooling system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531256A (en) * | 2013-10-25 | 2014-01-22 | 清华大学 | Pressurized water reactor prestressed concrete containment passive cooling system |
| CN104713286A (en) * | 2015-01-07 | 2015-06-17 | 阮仕荣 | Comprehensive outdoor cold source utilizing system |
| CN106328223A (en) * | 2016-09-05 | 2017-01-11 | 中广核研究院有限公司 | Novel passive safety shell energy control system |
| 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 |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587079A (en) * | 1981-02-24 | 1986-05-06 | Commissariat A L'energie Atomique | System for the emergency cooling of a pressurized water nuclear reactor core |
| WO1992001296A1 (en) * | 1990-07-10 | 1992-01-23 | General Electric Company | Reactivity control system and method |
| KR20080112776A (en) * | 2007-06-22 | 2008-12-26 | 경희대학교 산학협력단 | Ex-vessel cooling system for in-vessel retention of pressurized water reactor |
| CN201340152Y (en) * | 2008-12-24 | 2009-11-04 | 洛阳龙门煤业有限公司 | Novel circulating water cooling device |
-
2012
- 2012-01-17 CN CN201210014871.XA patent/CN102563999B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4587079A (en) * | 1981-02-24 | 1986-05-06 | Commissariat A L'energie Atomique | System for the emergency cooling of a pressurized water nuclear reactor core |
| WO1992001296A1 (en) * | 1990-07-10 | 1992-01-23 | General Electric Company | Reactivity control system and method |
| KR20080112776A (en) * | 2007-06-22 | 2008-12-26 | 경희대학교 산학협력단 | Ex-vessel cooling system for in-vessel retention of pressurized water reactor |
| CN201340152Y (en) * | 2008-12-24 | 2009-11-04 | 洛阳龙门煤业有限公司 | Novel circulating water cooling device |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103531256A (en) * | 2013-10-25 | 2014-01-22 | 清华大学 | Pressurized water reactor prestressed concrete containment passive cooling system |
| CN103531256B (en) * | 2013-10-25 | 2016-05-25 | 清华大学 | The non-active cooling system of presurized water reactor prestressed concrete containment vessel |
| CN104713286A (en) * | 2015-01-07 | 2015-06-17 | 阮仕荣 | Comprehensive outdoor cold source utilizing system |
| CN104713286B (en) * | 2015-01-07 | 2018-01-16 | 阮仕荣 | Outdoor cold source utilization system |
| CN106328223A (en) * | 2016-09-05 | 2017-01-11 | 中广核研究院有限公司 | Novel passive safety shell energy control system |
| 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 |
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| Publication number | Publication date |
|---|---|
| CN102563999B (en) | 2014-06-04 |
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Effective date of registration: 20230616 Address after: No.03073, Taiyuan Steel Industrial Park, Taiyuan City, Shanxi Province Patentee after: TAIYUAN BOILER GROUP Co.,Ltd. Address before: 100084, Haidian District, 100084 mailbox, 82 boxes, Tsinghua University patent office, Beijing Patentee before: TSINGHUA University |