CN102563999B - Passive natural circulation cooling system - Google Patents
Passive natural circulation cooling system Download PDFInfo
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- CN102563999B CN102563999B CN201210014871.XA CN201210014871A CN102563999B CN 102563999 B CN102563999 B CN 102563999B CN 201210014871 A CN201210014871 A CN 201210014871A CN 102563999 B CN102563999 B CN 102563999B
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- water
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- storage tank
- natural circulation
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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 heat transmission equipment technical field.
Background technology
In modern industry device, extensively exist the working environment of HTHP, as nuclear power plant reactor, coal gasifier etc.At present, the HTHP workpiece in engineering all moves in the environment of a sealing, and arranges a containment with cooling system outside its system.When HTHP workpiece occurs when abnormal, the cooling system of its outer containment is started working and whole system is carried out cooling, prevents blast and reveals and wait more serious disaster.But, current containment cooling system generally all needs electric power or other external force to drive, if in fact there is earthquake, when the burst accidents such as blast, the power system of cooling system also can be destroyed, thereby cause cooling system normally to move, can not carry out the high-temperature high-pressure work environment having had an accident coolingly, cause larger disaster.For example in March, 2011, 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 cannot run well, finally causes reactor core temperature to raise, and blasts and has caused nuclear leakage.
In order to solve under great burst accident, thereby impaired cannot the normal operation of the power system of containment cooling device causes the more problem of calamity, do not need external motivating force in the urgent need to one, relies on the cooling system that self just can normally effectively move.The present invention proposes a kind of passive natural circulation cooling system, it is characterized in that not relying on exterior power, only relies on the self gravitation effect of water to carry out the cooling system of heat exchange.Compared with traditional cooling system, native system has and does not rely on exterior power, simple in structure, easy to manufacture, the advantages such as Maintenance and Repair convenience, are particularly useful for nuclear power plant reactor, the accident emergency heat exchange cooling system in the fields such as coal gasifier, meets needs of production.
Summary of the invention
The object of the invention is in existing commercial plant on power-actuated cooling system basis, in order to solve impaired cannot the normal operation of power system of cooling device under great burst accident, thereby there is the more problem of calamity, propose a kind of passive natural circulation cooling system.
Technical scheme of the present invention is as follows:
A kind of passive 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, collects header, aqueduct and spray heat exchanger; Described down-comer top is connected with open type storage tank bottom, and down-comer bottom is connected with distributing header entrance; Rising heat-transfer surface bottom is connected with distributing header outlet, rising heat-transfer surface top with collect header entrance and be connected; Collecting header outlet is connected with spray heat exchanger through aqueduct; Open type storage tank and down-comer are arranged in atmospheric environment, and rising heat-transfer surface is arranged in thermal environment, and spray heat exchanger is positioned at open type storage tank water surface top.
The difference in height selection range of rising heat-transfer surface of the present invention is 5～15m, and its top vertically or tilt.Spray heat exchanger is 0.2m～0.5m apart from water surface elevation in open type storage tank.
Distribute header to be arranged in thermal environment or in atmospheric environment; Collecting header is arranged in thermal environment or in atmospheric environment.
The top of open type storage tank communicates with atmosphere, and the water quality requirement in 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 whole cycle heat exchange process.
The present invention has the following advantages and high-lighting effect compared with prior art scheme: 1. only rely on the self gravitation effect operation of water, do not need the driving forces such as extraneous electric power, reliability is high, has reduced the risk that cooling system cannot normally move; 2. adopt open tank, top communicates with atmosphere, and attended operation facilitates simple and easy; 3. system is carried out water treatment, has prevented the scale formation that produces in cycle heat exchange process, safe and reliable.
Brief description of the drawings
Fig. 1 is the cooling schematic diagram of a kind of passive natural circulation.
1-thermal source; 2-thermal environment; 3-open type storage tank; 4-down-comer; 5-distributes header; 6-rising heat-transfer surface; 7-collects header; 8-aqueduct; 9-sprays heat exchanger.
Detailed description of the invention
Further illustrate principle of the present invention, concrete structure and preferred forms below in conjunction with accompanying drawing.
Fig. 1 is a kind of passive natural circulation cooling system, and this system comprises open type storage tank 3, down-comer 4, distribution header 5, rising heat-transfer surface 6, collects header 7, aqueduct 8 and spray heat exchanger 9.Described down-comer top is connected with open type storage tank bottom, and down-comer bottom is connected with distributing header entrance; Rising heat-transfer surface bottom is connected with distributing header outlet, rising heat-transfer surface top with collect header entrance and be connected; Collecting header outlet is connected with spray heat exchanger 9 through aqueduct 8; Open type storage tank and down-comer are arranged in atmospheric environment, and rising heat-transfer surface is arranged in thermal environment 2, and spray heat exchanger 9 is positioned at open type storage tank water surface top.
The discrepancy in elevation selection range of this system rising heat-transfer surface is 5～15m, and its top vertically or tilt; Spray heat exchanger is 0.2m～0.5m apart from water surface elevation in open type storage tank; Water quality requirement in 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 whole cycle heat exchange process.Distribute header 5 and collect header 7 and can be arranged in thermal environment or in atmospheric environment.
Water in storage tank relies on self gravitation to enter in down-comer, enters distribution header, distributes header middle water level to be positioned at higher-pressure region, in supercooled state; Working-medium water flows to the external heat that absorbs heat in heat exchange raised floor, forms Natural Circulation.The heat absorption of water in heat exchanger tube is risen, and through collecting header and aqueduct outlet enters spray heat exchanger, and is finally back to and in storage tank, forms circulation.
Contrast traditional heat exchange cooling system, this system adopts open type storage tank, down-flow pipe, distribution header, the heat-transfer surface that rises, collects the heat exchange cooling system that header, aqueduct and spray heat exchanger form, do not need electric power only to rely on the self gravitation effect of water, there is the features such as simple in structure, easy to manufacture and reliable, effectively met needs of production.
Claims (6)
1. a passive 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), collects header (7), aqueduct (8) and spray heat exchanger (9), described down-comer (4) top is connected with open type storage tank (3) bottom, and down-comer (4) bottom is connected with distributing header (5) entrance; Rising heat-transfer surface (6) bottom is connected with distributing header (5) outlet, rising heat-transfer surface (6) top with collect header (7) entrance and be connected; Collecting 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 atmospheric environment, and the top of open type storage tank communicates with atmosphere; Rising heat-transfer surface (6) is arranged in thermal environment (2), and spray heat exchanger (9) is positioned at open type storage tank (3) water surface top.
2. passive natural circulation cooling system as claimed in claim 1, is characterized in that: the difference in height selection range of described rising heat-transfer surface is 5～15m, and its top vertically or tilt.
3. passive natural circulation cooling system as claimed in claim 1 or 2, is characterized in that: spray heat exchanger is 0.2m～0.5m apart from water surface elevation in open type storage tank.
4. passive natural circulation cooling system as claimed in claim 1, is characterized in that: the water quality requirement in 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. passive natural circulation cooling system as claimed in claim 1, is characterized in that: distribute header to be arranged in thermal environment or in atmospheric environment.
6. passive natural circulation cooling system as claimed in claim 1, is characterized in that: collect header and be arranged in thermal environment or in 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 |
|---|---|
| CN102563999A CN102563999A (en) | 2012-07-11 |
| CN102563999B true CN102563999B (en) | 2014-06-04 |
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| CN201210014871.XA Active CN102563999B (en) | 2012-01-17 | 2012-01-17 | Passive natural circulation cooling system |
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Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN104713286B (en) * | 2015-01-07 | 2018-01-16 | 阮仕荣 | Outdoor cold source utilization system |
| CN106328223B (en) * | 2016-09-05 | 2018-06-22 | 中广核研究院有限公司 | A kind of novel passive containment energy management 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 |
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| CN102563999A (en) | 2012-07-11 |
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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 |
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