CN102288052A - Liquid-state metal-sodium regenerative heater and heating method thereof - Google Patents
Liquid-state metal-sodium regenerative heater and heating method thereof Download PDFInfo
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- CN102288052A CN102288052A CN 201110199070 CN201110199070A CN102288052A CN 102288052 A CN102288052 A CN 102288052A CN 201110199070 CN201110199070 CN 201110199070 CN 201110199070 A CN201110199070 A CN 201110199070A CN 102288052 A CN102288052 A CN 102288052A
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Abstract
The invention discloses a liquid-state metal-sodium regenerative heater and a heating method thereof, wherein the regenerative heater is trumpet-shaped, is made of high-temperature steel and comprises an end cover, a connecting pipe, a connecting barrel, a shell pipe, an angle pipe, a heat-exchanging pipe and a flow-dismantling plate, wherein high-temperature sodium flows in the heat-exchanging pipe from the top to the bottom, the temperature is decreased to 500 DEG C from 900 DEG C, low-temperature sodium flows inside the shell pipe and outside the heat-exchanging pipe from the bottom to the top, and the temperature is increased to 850 DEG C from 450 DEG C. The regenerative heater has the advantages of high-temperature resistance, good sealing property, small heat stress, small flow resistance and the like and is applicable to liquid-state metal systems through checking calculation; and operating practice proves that the regenerative heater is stable to operate, and design requirements can be completely met.
Description
Technical field
The invention belongs to the regenerator technical field, be specifically related to the regenerative heater device of a kind of fluent metal loop high-temperature sodium and low temperature sodium heat exchange.
Background technology
Liquid metal sodium high-boiling loop is the seethe with excitement platform of two phase behaviour research experiment of liquid towards sodium metal.Liquid metal sodium boiling point under normal pressure is 882 ℃, and getting design temperature is 900 ℃.In order in test section, to obtain boiling, guarantee electromagnetic pump simultaneously, device running temperatures such as flowmeter are lower than 600 ℃, need to arrange preheater and regenerative heater before the test section.Wherein the effect of regenerative heater is to be recycled by 900 ℃ of entrained heats of high-temperature sodium of test section outlet.This part heat can be heated to 850 ℃ with the sodium of 450 ℃ of boiling branch road imports in regenerative heater, and the high-temperature sodium of 900 ℃ of test section outlets is cooled to 500 ℃, thereby satisfies the operating temperature that electromagnetic pump allows.The sodium that is heated to 850 ℃ is heated near the test section of being allowed for access after the saturation temperature by preheater again.
The cardinal principle of regenerative heater is the heat of recovery system high-temperature part, system hypothermia is partly heated, thereby improve the thermal efficiency of system and the operation intensity of other firing equipment of reduction system and cooling device, reduce the cost of system generally, make the more safe and effective operation of system.
For example, Chinese patent application number discloses a kind of regenerator device for 93114549.X, it has one and is made of discrete material, place the annular heat storage medium between the two coaxial cylindrical fence, a hot collecting chamber and a cold fence that wraps in outside of being encircled a city by hot fence inside is that one side and shell wall are the cold collecting chamber between the another side.Wherein hot collecting chamber is sealed by the taper cover cap of the ceramic material on the last support ring that is seated in hot fence, and a segment distance place establishes protecting screen above cover cap, adjoins mutually with the regenerator outer wall.This design has improved regenerator reliability of operation in the thermal region, has improved the intensity and the hear resistance of cover cap, and can be absorbed in the thrust in its support ring district and be distributed in the tension force of its periphery, can dwindle the overall dimension of structure simultaneously.But this regenerator is used for conventional fluids such as water or air more, for the liquid metal system, at first be that the heat transfer rate can't reach requirement, secondly because the liquid metal sodium chemical property is active, need extraordinary sealing, therefore be not suitable for as the liquid metal system heat exchanger.
And for example, Chinese patent application numbers 20051041779.2 discloses a kind of multi-channel plug-in heat regenerator.Comprise heat exchanger core body and the collection case at night that is connected as a single entity with heat exchanger core body, be characterized in, heat exchanger core body is made of the center-aisle of offering the small-bore and peripheral channel, and center-aisle protrudes in peripheral channel, at the two ends of heat exchanger core body from the collection case at night of the bilateral perforate that is respectively installed with the collection case at night of the one-sided perforate that is connected with center-aisle outside to inside and is connected with peripheral channel.This regenerator to have the main bodys of arranging the heat exchanger of small-bore channel design as two kinds of fluid heat exchange more.Its advantage is to reduce loss of refrigeration capacity, increases circulatory system efficient, and the colleague dwindles physical dimension, reduces product cost.Therefore but this regenerator is the carbon dioxide design of Cooling System, is adapted at moving high pressure low temperature under, for the high-temperature pressure condition of liquid metal system and be not suitable for, is not suitable for as the liquid metal system heat exchanger.
Simple in structure in order to make, easily manufactured, my research group once was designed to regenerative heater straight tube shell heat exchanger structure.But check in the calculating at it, the exchange heat of finding sodium import department and exit is very big to whole efficiency of heat exchanger influence, heat exchange efficiency in the tube bank is not high yet, and a sodium inlet end cap place thermal stress is bigger, is not suitable for the high temperature fluent metal system and uses.
Summary of the invention
Purpose of the present invention is exactly the shortcoming that overcomes above-mentioned prior art; thereby provide a kind of thermal stress that produces promptly can bear liquid metal heat exchange under the high temperature time to guarantee stable and safe in operation; can guarantee heat exchange efficiency again, and reduce the liquid metal regenerative heater of flow resistance as far as possible.
The objective of the invention is to be achieved through the following technical solutions:
The liquid metal sodium regenerative heater comprises two atresia end caps, adapter, two porose end caps, four extend necks, two packages, 19 heat exchanger tubes, ten split flow plates and four cornues; Regenerative heater totally is " eight " font, and its corner is that four cornues are spliced; Corner both sides welding package, the package other end welds the end cap of perforate respectively, and the end cap opposite side links to each other with adapter, takes over opposite side welding atresia end cap seal; Equilateral triangle is arranged 19 heat exchanger tubes in the package, and the heat exchanger tube both sides are connected with two porose end caps respectively; Be connected to the extend neck that is used for sodium import and export on both sides are taken over respectively, package is useful on the extend neck that secondary sodium is imported and exported near porose end cap one termination.
The overall corner of described regenerative heater is that four cornues are spliced, and the angle between the adjacent cornue is 120 degree.
Diverse location is arranged ten split flow plates between the described heat exchanger tube and between heat exchanger tube and the package.
Described heat exchanger tube both sides are connected with two porose end caps respectively, and the heat exchanger tube corner bends to circular arc.
Heating means based on described liquid metal sodium regenerative heater, when system moves, a higher sodium of temperature that is flowed back to by test section is entered by upside atresia end cap by a sodium import extend neck that is opened in the upside adapter, the cavity that adapter and porose end cap surround, enter heat exchanger tube by porose end cap upper shed then, in heat exchanger tube with the low temperature sodium outside the heat transferred heat exchanger tube, finally be pooled to downside by the atresia end cap, the cavity that adapter and porose end cap surround, this moment, a sodium temperature was reduced to 500 ℃, flowed out regenerative heater by a sodium outlet extend neck then; As for the lower secondary sodium of temperature, flow through behind the electromagnetic pump, flow in the package by the secondary sodium inlet extend neck of open lower side on package, in package and the outer space of heat exchanger tube mobile, not only flow along the package direction during this time, also have the split flow plate to strengthen mixing of secondary sodium, the heat temperature of a sodium raises in the secondary sodium absorption heat exchanger tube during this period, the secondary sodium outlet extend neck that is opened on the package by upside flows out regenerative heater at last, and this moment, secondary sodium temperature was promoted to 850 ℃.
The structural design of regenerative heater is " eight " font shell-and-tube heat exchanger, and material is new No. 13 high-temperature steels (being equivalent to indium section Lip river iridium-800).Mainly, take over by end cap, extend neck, package, heat exchanger tube, cornues etc. are welded to form.
The present invention has the following advantages and beneficial effect:
1. regenerative heater adopts the high-temperature steel manufacturing, can at high temperature work, and satisfies liquid metal system service requirement;
2. regenerative heater adopts and is welded to connect, and good sealing is arranged, and the safe operation of liquid metal system is guaranteed;
3. regenerative heater has 19 heat exchanger tubes that are triangularly arranged, and one time sodium flows in heat exchanger tube, and secondary sodium flows between heat exchanger tube and package, and high temperature and low temperature sodium are taked the reverse flow heat exchange, have improved heat exchange efficiency and have reduced thermal stress;
4. high-temperature sodium flows in pipe, and low temperature sodium flows outside pipe, helps reducing thermal loss.
In a word, the heat that this device can effectively be collected test section outlet high-temperature sodium is used to heat low temperature sodium, and help reducing the electromagnetic pump operating temperature and reduce the firing equipment design difficulty simultaneously, and the heat exchange efficiency height, flow resistance is little, is fit to be assemblied in experiment liquid metal sodium loop.
Description of drawings:
Fig. 1 is a liquid metal sodium regenerative heater structural representation of the present invention;
Fig. 2 is a liquid metal sodium regenerative heater A-A face view of the present invention;
Wherein: 1 is the atresia end cap; 2 for taking over; 3 is porose end cap; 4 is extend neck; 5 is package; 6 is heat exchanger tube; 7 is the split flow plate; 8 is cornue.
The specific embodiment:
Below in conjunction with accompanying drawing the present invention is done and to describe in further detail:
Referring to Fig. 1, liquid metal sodium regenerative heater of the present invention comprises atresia end cap (two), takes over (two) porose end cap (two), extend neck (four), package (two), heat exchanger tube (19), split flow plate (ten), cornue (four).
Regenerative heater totally is " eight " font, and its corner is that four cornues respectively differ 30 ° and are spliced, near circular arc; Corner both sides welding package, the package other end welds the end cap of perforate respectively, and the end cap opposite side links to each other with adapter, takes over opposite side welding atresia end cap seal.Equilateral triangle arranges 19 with heat exchanger tube in the package, and the heat exchanger tube both sides are connected with two perforate end caps respectively, and the corner bends to circular arc; Be connected to a sodium on both sides are taken over respectively and import and export extend neck, package has secondary sodium to import and export extend neck near porose end cap one termination.Diverse location is arranged ten split flow plates between the heat exchanger tube and between heat exchanger tube and the package.
Embodiment:
When system moves, a higher sodium of temperature that is flowed back to by test section is entered by upside atresia end cap by a sodium import extend neck that is opened in the upside adapter, the cavity that adapter and porose end cap surround, enter heat exchanger tube by porose end cap upper shed then, in heat exchanger tube with the low temperature sodium outside the heat transferred heat exchanger tube, finally be pooled to downside by the atresia end cap, the cavity that adapter and porose end cap surround, this moment, a sodium temperature was reduced to 500 ℃, flowed out regenerative heater by a sodium outlet extend neck then; As for the lower secondary sodium of temperature, flow through behind the electromagnetic pump, flow in the package by the secondary sodium inlet extend neck of open lower side on package, in package, flow in the outer space of heat exchanger tube, during not only flow along the package direction, also have the split flow plate to strengthen mixing of secondary sodium, secondary sodium absorbs the heat temperature rising of a sodium in the heat exchanger tube during this period, and the secondary sodium outlet extend neck that is opened on the package by upside flows out regenerative heater at last, and this moment, secondary sodium temperature was promoted to 850 ℃.
Calculate according to checking, it is as follows to obtain the regenerative heater major parameter:
A sodium inlet temperature t
1in=900 ℃,
A sodium outlet temperature t
1out=500 ℃,
Secondary sodium inlet temperature t
2in=450 ℃,
Secondary sodium outlet temperature t
2out=850 ℃,
Sodium Δ t that on average lowers the temperature
1=900-500=400 ℃
The secondary sodium Δ t that on average heats up
2=850-450=400 ℃
Regenerative heater mean temperature difference Δ t
12=50 ℃
Regenerative heater total heat transfer Q=336.1kW
Required total heat exchange area F '=1.293m
2
The single heat exchange tube parameter:
Length 1=2.35m, internal diameter 0.012m, wall thickness 1.5mm
Design total heat exchange area F=1.69m
2
Design capacity 30%
According to above parameter, this regenerative heater can satisfy the liquid metal sodium flow from 1.81e
-3m
3/ h to 3.28m
3A secondary sodium heat exchange requirement in whole system during/h, and enough design capacities are arranged, satisfied the service requirement of liquid metal system fully, be fit to be applied in the high temperature fluent metal system.Through installing and using, its good operation stability can reach designing requirement fully.
Above content is to further describing that the present invention did in conjunction with concrete preferred implementation; can not assert that the specific embodiment of the present invention only limits to this; for the general technical staff of the technical field of the invention; without departing from the inventive concept of the premise; can also make some simple deduction or replace, all should be considered as belonging to the present invention and determine scope of patent protection by claims of being submitted to.
Claims (5)
1. the liquid metal sodium regenerative heater is characterized in that: comprise two atresia end caps, adapter, two porose end caps, four extend necks, two packages, 19 heat exchanger tubes, ten split flow plates and four cornues; Described regenerative heater totally is " eight " font, and its corner is spliced by four cornues; Corner both sides welding package, the package other end welds the end cap of perforate respectively, and the end cap opposite side links to each other with adapter, takes over opposite side welding atresia end cap seal; Equilateral triangle is arranged 19 heat exchanger tubes in the package, and the heat exchanger tube both sides are connected with two porose end caps respectively; Be connected to the extend neck that is used for sodium import and export on both sides are taken over respectively, package is useful on the extend neck that secondary sodium is imported and exported near porose end cap one termination.
2. liquid metal sodium regenerative heater according to claim 1, it is characterized in that: the overall corner of described regenerative heater is that four cornues are spliced, the angle between the adjacent cornue is 120 degree.
3. liquid metal sodium regenerative heater according to claim 1 is characterized in that: arrange ten split flow plates between the described heat exchanger tube and between heat exchanger tube and the package respectively.
4. liquid metal sodium regenerative heater according to claim 1, it is characterized in that: described heat exchanger tube both sides are connected with two porose end caps respectively, and the heat exchanger tube corner bends to circular arc.
5. based on the heating means of claim 1,2,3 or 4 described liquid metal sodium regenerative heaters, it is characterized in that:
When system moves, a higher sodium of temperature that is flowed back to by test section is entered by upside atresia end cap by a sodium import extend neck that is opened in the upside adapter, the cavity that adapter and porose end cap surround, enter heat exchanger tube by porose end cap upper shed then, in heat exchanger tube with the low temperature sodium outside the heat transferred heat exchanger tube, finally be pooled to downside by the atresia end cap, the cavity that adapter and porose end cap surround, this moment, a sodium temperature was reduced to 500 ℃, flowed out regenerative heater by a sodium outlet extend neck then; As for the lower secondary sodium of temperature, flow through behind the electromagnetic pump, flow in the package by the secondary sodium inlet extend neck of open lower side on package, in package and the outer space of heat exchanger tube mobile, not only flow along the package direction during this time, also have the split flow plate to strengthen mixing of secondary sodium, the heat temperature of a sodium raises in the secondary sodium absorption heat exchanger tube during this period, the secondary sodium outlet extend neck that is opened on the package by upside flows out regenerative heater at last, and this moment, secondary sodium temperature was promoted to 850 ℃.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2011101990700A CN102288052B (en) | 2011-07-15 | 2011-07-15 | Liquid-state metal-sodium regenerative heater and heating method thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047884A (en) * | 2013-01-13 | 2013-04-17 | 中国科学院合肥物质科学研究院 | Compact type liquid metal heat exchanger |
| CN104482795A (en) * | 2014-12-10 | 2015-04-01 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Heat exchanger core applicable to curved surface layout |
| CN110068137A (en) * | 2019-04-26 | 2019-07-30 | 西安交通大学 | Direct-type liquid metal sodium high power heating system and heating means |
| CN110068138A (en) * | 2019-04-26 | 2019-07-30 | 西安交通大学 | A kind of liquid metal sodium direct-type high power heating system and heating means |
Citations (5)
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| CN1094507A (en) * | 1992-11-16 | 1994-11-02 | 乔治·克劳德方法的研究开发空气股份有限公司 | Regenerator |
| US20030037909A1 (en) * | 2001-08-27 | 2003-02-27 | Genrikh Smyrnov | Method of action of the plastic heat exchanger and its constructions |
| CN1486923A (en) * | 2003-07-17 | 2004-04-07 | 上海交通大学 | Hydrogen generating and storing system and method with sodium-cooled fast reactor as heat source for catalytic pyrolysis of methane |
| CN1657848A (en) * | 2005-03-09 | 2005-08-24 | 西安交通大学 | Multi-channel plug-in heat regenerator |
| CN201897405U (en) * | 2010-11-24 | 2011-07-13 | 天津国际机械有限公司 | U-shaped tubular heat exchanger |
-
2011
- 2011-07-15 CN CN2011101990700A patent/CN102288052B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1094507A (en) * | 1992-11-16 | 1994-11-02 | 乔治·克劳德方法的研究开发空气股份有限公司 | Regenerator |
| US20030037909A1 (en) * | 2001-08-27 | 2003-02-27 | Genrikh Smyrnov | Method of action of the plastic heat exchanger and its constructions |
| CN1486923A (en) * | 2003-07-17 | 2004-04-07 | 上海交通大学 | Hydrogen generating and storing system and method with sodium-cooled fast reactor as heat source for catalytic pyrolysis of methane |
| CN1657848A (en) * | 2005-03-09 | 2005-08-24 | 西安交通大学 | Multi-channel plug-in heat regenerator |
| CN201897405U (en) * | 2010-11-24 | 2011-07-13 | 天津国际机械有限公司 | U-shaped tubular heat exchanger |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103047884A (en) * | 2013-01-13 | 2013-04-17 | 中国科学院合肥物质科学研究院 | Compact type liquid metal heat exchanger |
| CN104482795A (en) * | 2014-12-10 | 2015-04-01 | 中国航空工业集团公司金城南京机电液压工程研究中心 | Heat exchanger core applicable to curved surface layout |
| CN110068137A (en) * | 2019-04-26 | 2019-07-30 | 西安交通大学 | Direct-type liquid metal sodium high power heating system and heating means |
| CN110068138A (en) * | 2019-04-26 | 2019-07-30 | 西安交通大学 | A kind of liquid metal sodium direct-type high power heating system and heating means |
| CN110068138B (en) * | 2019-04-26 | 2020-05-15 | 西安交通大学 | Direct high-power heating system and method for liquid sodium metal |
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| CN102288052B (en) | 2012-11-28 |
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