CN109855282A - Radiant type liquid metal sodium high power heating system and heating means - Google Patents
Radiant type liquid metal sodium high power heating system and heating means Download PDFInfo
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- CN109855282A CN109855282A CN201910074447.6A CN201910074447A CN109855282A CN 109855282 A CN109855282 A CN 109855282A CN 201910074447 A CN201910074447 A CN 201910074447A CN 109855282 A CN109855282 A CN 109855282A
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Abstract
A kind of radiant type liquid metal sodium high power heating system and heating means, the system include an entrance Trunk Line, one outlet Trunk Line, multiple high-power heaters being connected in parallel；Liquid metal sodium is heated laggard inlet/outlet pipeline in high-power heater, is respectively disposed with one layer of heating rod inside and outside door shape liquid metal sodium pipeline in high-power heater design, is heated using radiation heat transfer to sodium；Heating system introduces nitrogen protection, has completely cut off reacting for air and other gases and Liquid Sodium；Entire heating system heaters at different levels are mutually isolated, can control on-off and adjustment power respectively, and introduce automatic feedback adjusting, and the sodium outlet temperature of entire heating system is enabled to reach the requirement of experiment condition；Entire heating system economical and efficient, safe and reliable, strong operability.
Description
Technical field
The present invention relates to liquid metal technical field of heating, and in particular to a kind of radiant type liquid metal sodium high power heating
System and heating means.
Background technique
Sodium-steam generator is the important pivot for connecting sodium-cooled fast reactor secondary circuit and three circuits, it generates reactor
The main water supply of heat generate steam, so that pushing turbine does work.Steam generator still separates secondary circuit and three simultaneously
The important barrier in circuit generates very big safety accident once heat transfer tracheal rupture will cause serious sodium-water reaction.It is cold fast in sodium
It is very crucial a part for the research of sodium-steam generator in heap research, the relatively early several countries for developing fast reactor are
A large amount of research work is carried out to this, in steam generator test, many countries replace anti-in the way of gas heating
The heat for answering heap to export, such as Japan SGTF (Steam Generator Test Facility) rack, India SGTF (Steam
Generator Test Facility) rack, U.S. SGTR (Steam Generator Test Rig) test-bed etc..Fire
Flame heating method is primarily present the matching and processing problems of boiler, while introducing boiler and increasing in operation and safety largely not
Degree of certainty improves the level of empirical risk assessment, increases the probability that major accident occurs.
According to existing test run experience, there are mainly two types of the Electric heatings of sodium working medium, direct-type heating and radiant type
Heating.Direct-type heating, which refers to, is directly inserted into heating rod in sodium working medium, is transmitted by the heat convection of sodium and heater surfaces
Heat, this heating method principle is simple, and efficiency is slightly higher, and thermal loss is small, but since sodium is directly to contact with heating rod,
And heating rod and the weld seam quantity that sodium shell junction needs are very big, once it is leaked at heating rod and barrel soldering
Liquid metal sodium will be directly resulted in leak into external environment, generate huge security risk.Liquid in radiant heater design
State metallic sodium is separated with heating rod, and sodium flows in independent sodium channel, and heating rod is changed outside sodium channel by radiation
Heat provides heat for sodium, and this heating method is since the radiation heat transfer thermal efficiency is smaller compared to heat convection, and heat leaks ratio
Example is also heated too high above direct-type, therefore heating efficiency is lower than direct-type.In addition, direct-type heater design comparison is compact,
Therefore entire heater total volume is much smaller compared to radiant heater.The most important advantage of radiant heater is liquid
Metallic sodium does not contact directly with heating rod, and through weld is seldom on the cylinder of sodium channel, therefore leakage probability is much smaller, or even just
It calculates and occurs to leak also also outermost heat preservation cylinder as protection, safety is much higher compared to direct-type heater.
Summary of the invention
Domestic and international sodium water test much had the accident of sodium leakage, this experimental scale is larger, once sodium leakage occurs, it will
It can cause serious safety accident, therefore consider safety factor, the present invention devises a kind of radiant type liquid metal sodium high power and adds
Hot systems.The present invention is by reasonable Arrangement heating rod and chooses suitable heating and its regulative mode, meets existing sodium-cooled fast reactor
The needs of the large scale equipments research and development test such as steam generator, heat exchanger verifying, provide and are tried instead of the conventional energy resource of nuclear energy
It tests, heater design is simple and easy, and effective, safety and economy are higher.
In order to achieve the above object, the present invention adopts the following technical scheme:
A kind of radiant type liquid metal sodium high power heating system, including an entrance Trunk Line, one outlet Trunk Line,
Multiple high-power heaters being connected in parallel；Liquid metal sodium enters heating system, initially enters first on entrance Trunk Line
A three-way interface, first threeway first outlet are connected to the first high-power heater 1, the first Gao Gong by first entrance valve 201
The outlet of rate heater 1 connection first outlet valve 301,301 connection outlet Trunk Line of first outlet valve, first threeway second outlet
It is directly connected to second three-way interface, subsequent pipeline connects other high-power heaters, multiple high power heating with identical structure
The outlet fluid of device imports outlet Trunk Line via multiple outlet valves, and sodium inlet and outlet are respectively disposed with thermocouple measurement sodium temperature；With
Upper first high-power heater 1, first entrance valve 201, first outlet valve 301 constitute the first heating unit；Second high power adds
Hot device 2, second entrance valve 202, second outlet valve 302 constitute the second heating unit, and so on, multiple heating units are constituted,
The structure and flow of each heating unit are all the same；Each heating unit makes entirely to add in outer layer covers heat-preservation cotton, starting
Hot cell temperature reaches the freezing point of sodium or more, prevents pipeline jam accident caused by the solidification of sodium；It further include adding with each high power
The PLC control cabinet and control system 5 of hot device connection.
The quantity of the high-power heater is four, respectively the first high-power heater 1, the second high-power heater
2, third high-power heater 3 and the 4th high-power heater 4, the power of each high-power heater are 5MW, total 20MW.
The multiple high-power heater structure being connected in parallel is all the same, wherein the first high-power heater 1 includes adding
Hot device shell 105, inlet flange 101 and the entrance main pipeline 104 being connected with inlet flange 101, outlet(discharge) flange 114 and with outlet
The connected outlet main pipeline 113 of flange 114, connection entrance main pipeline 104 and the door shape tube bank 110 for exporting main pipeline 113, point
The inside and outside inside heating cluster 108 of door shape tube bank 110 and external heating cluster 109 are not set；Door shape tube bank
110 both ends are respectively welded on entrance main pipeline 104 and outlet main pipeline 113；The door shape tube bank 110 is several edges
The door shape pipeline of main pipeline direction parallel arrangement, fluid enter after main pipeline and divide in flow process into door shape tube bank
Stream, is heated wherein；The internal heating cluster 108 and external heating cluster 109 are arranged in parallel single of door shape
Tube bank, it is 110 inside and outside to be arranged in door shape tube bank, has a distance away from door shape tube bank 110, passes through radiation heat transfer
Fluid in heating tube bundle；Above-mentioned entrance main pipeline 104, outlet main pipeline 113, door shape tube bank 110, internal heating cluster
108 are all disposed in heater housings 105 with external heating cluster 109, and support grid 107 is disposed in heater housings 105
Door shape tube bank 110, internal heating cluster 108 and external heating cluster 109 are supported；104 He of entrance main pipeline
Outlet 113 inlet of main pipeline is arranged with temperature thermocouple 103 and empties hole 102, and temperature thermocouple 103 is used to measure heating
The out temperature of fluid in device empties hole and is used to remaining fluid in drained heater；The 105 outside cloth of heater housings
It is equipped with nitrogen charging mouth 112, gas vent 106 and instrument junction box 111.
The entrance main pipeline 104 and outlet main pipeline 113 are the circular pipe that diameter is DN200；The door shape
The diameter of tube bank 110 is DN25.
The multiple high-power heater adjusts heating power using PLC control cabinet and control system 5, and each high power adds
The power of hot device can be adjusted individually, to meet requirement of the different tests condition to outlet sodium temperature.
All inlet valve, outlet valve are all made of electric control valve, and all temperature, pressure signal are by data acquisition system
System acquisition is adjusted and is analyzed；Sodium outlet temperature is arranged in PLC control cabinet and control system 5 and heating power is fed back, and is exported by sodium
Temperature and declared working condition temperature gap, adjust high-power heater power at different levels, realize the auto-adjustment control of outlet temperature.
The heating means of the radiant type liquid metal sodium high power heating system first turn on all high power heating
The inlet valve and outlet valve of device carry out vacuumize process to heating system, by the nitrogen charging mouth of each high-power heater to system
In be filled with nitrogen to required pressure and maintain；It opens and heats cluster outside the high-power heater of each heating unit, so that respectively adding
High-power heater, inlet valve and the outlet valve and line temperature of hot cell reach within the scope of 180 DEG C -220 DEG C, keep outer
It heats cluster heating power and stablizes in portion；After liquid metal sodium enters heating system, high-power heaters at different levels are opened, control adds
Thermal power slowly increases；According to sodium outlet temperature and declared working condition temperature gap, high-power heater power at different levels are adjusted, until
Liquid metal sodium is heated to required power；When heating system needs to close, the first high-power heater 1, second is successively closed
High-power heater 2, and so on, it closes all high-power heaters, keeps heating power constant, to all metallic sodiums from adding
After hot systems emptying, stop heating, while keeping nitrogen protection.
Compared to the prior art compared with the present invention has following advantage:
1. it is completely isolated between liquid metal sodium and high-power heater, and the two is disposed in heater housings
It is interior, there was only seldom penetration piece weld seam on heater housings, reduce to the full extent liquid metal sodium leakage possibility and
Risk after leakage；
2. be disposed in heater double-layer heating tube bank, be arranged in sodium tube bank inside and outside, to fluid in channel into
Row Double-side Heating saves space while guaranteeing heating power, reduces the overall volume of heater；
3. every grade of heater power of heating system can separate regulation, and each heater conduit is mutually indepedent,
When not needing oepration at full load or under accident conditions, each heater can be isolated by switching exits and entrances valve,
The operation of other heaters is not influenced, enhances the safety and operating flexibility of system；
4. introducing automatic feedback regulation scheme, the sodium outlet temperature of entire heating system is enabled to reach experiment condition
Requirement；
In short, this heating system structure can complete the temperature control of liquid metal sodium, whole system economical and efficient, safety
Reliably, make it possible the high power electric heating of liquid metal sodium.
Detailed description of the invention
Fig. 1 is radiant type liquid metal sodium high power heating system figure.
Fig. 2 is high-power heater main view.
Fig. 3 is high-power heater side view.
Specific embodiment
The present invention is described in detail with reference to the accompanying drawings and examples:
As shown in Figure 1, a kind of radiant type liquid metal sodium high power heating system of the present invention, including an entrance supervisor
Line, one outlet Trunk Line, multiple high-power heaters being connected in parallel；Liquid metal sodium enters heating system, initially enters
First three-way interface on entrance Trunk Line, first threeway first outlet are connected to the first Gao Gong by first entrance valve 201
Rate heater 1, the first high-power heater 1 outlet connection first outlet valve 301,301 connection outlet Trunk Line of first outlet valve,
First threeway second outlet is directly connected to second three-way interface, and subsequent pipeline connects other high powers with identical structure and heats
The outlet fluid of device, multiple high-power heaters imports outlet Trunk Line via multiple outlet valves, and sodium inlet and outlet are respectively disposed with
Thermocouple measurement sodium temperature；Above first high-power heater 1, first entrance valve 201, first outlet valve 301 constitute the first heating
Unit；Second high-power heater 2, second entrance valve 202, second outlet valve 302 constitute the second heating unit, and so on,
Multiple heating units are constituted, the structure and flow of each heating unit are all the same；Each heating unit is kept the temperature in outer layer covers
Cotton, when starting, make entire heating unit temperature reach the freezing point of sodium or more, prevent pipeline jam accident caused by the solidification of sodium；Also wrap
Include the PLC control cabinet connecting with each high-power heater and control system 5.The quantity of high-power heater described in the present embodiment
It is four, respectively the first high-power heater 1, the second high-power heater 2, third high-power heater 3 and the 4th Gao Gong
Rate heater 4, the power of each high-power heater are 5MW, total 20MW.Third high-power heater 3, third inlet valve 203,
Third outlet valve 303 constitutes third heating unit, the 4th high-power heater 4, the 4th inlet valve 204,304 structure of the 4th outlet valve
At the 4th heating unit.
As shown in Figures 2 and 3, first high-power heater 1 include heater housings 105, inlet flange 101 and with
The connected entrance main pipeline 104 of inlet flange 101, outlet(discharge) flange 114 and the outlet main pipeline 113 being connected with outlet(discharge) flange 114,
Connect entrance main pipeline 104 and export main pipeline 113 door shape tube bank 110, be separately positioned on door shape tube bank 110 inside and
External inside heating cluster 108 and external heating cluster 109；The both ends of door shape tube bank 110 are respectively welded at entrance supervisor
On road 104 and outlet main pipeline 113；The door shape tube bank 110 is several door shapes along main pipeline direction parallel arrangement
Pipeline, fluid, which enters after main pipeline, to be shunted in flow process into door shape tube bank, is heated wherein；The internal heating
Cluster 108 and external heating cluster 109 are door shape single tube bank arranged in parallel, are arranged in door shape tube bank 110
It is inside and outside, there is a distance away from door shape tube bank 110, passes through the fluid in radiation heat transfer heating tube bundle；Above-mentioned entrance master
Pipeline 104, outlet main pipeline 113, door shape tube bank 110, internal heating cluster 108 and external heating cluster 109 are all disposed within
In heater housings 105, support grid 107 is disposed in heater housings 105 to door shape tube bank 110, internal heating cluster
108 are supported with external heating cluster 109；The entrance main pipeline 104 and outlet 113 inlet of main pipeline are arranged with survey
It warms galvanic couple 103 and empties hole 102, temperature thermocouple 103 is used to the out temperature of fluid in HEATER FOR MEASURING, empties hole and uses
Carry out remaining fluid in drained heater；105 disposed outside of heater housings has nitrogen charging mouth 112, gas vent 106 and instrument
Junction box 111.
As the preferred embodiment of the present invention, the entrance main pipeline 104 and outlet main pipeline 113 are that diameter is
The circular pipe of DN200；The diameter of the door shape tube bank 110 is DN25.
The multiple high-power heater adjusts heating power using PLC control cabinet and control system 5, and each high power adds
The power of hot device can be adjusted individually, to meet requirement of the different tests condition to outlet sodium temperature.
All inlet valves of the present invention, outlet valve are all made of electric control valve, and all temperature, pressure signal pass through data
Acquisition system acquisition is adjusted and is analyzed；Sodium outlet temperature is arranged in PLC control cabinet and control system 5 and heating power is fed back, and passes through
Sodium outlet temperature and declared working condition temperature gap, adjust high-power heater power at different levels, realize the automatic adjustment of outlet temperature
Control.
Specific heating means are as follows: the inlet valve and outlet valve for first turning on all high-power heaters, to heating system into
Row vacuumize process is filled with nitrogen into system to required pressure by the nitrogen charging mouth of each high-power heater and maintains；It opens
Cluster is heated outside the high-power heater of each heating unit, so that the high-power heater of each heating unit, inlet valve and going out
Mouth valve and line temperature reach within the scope of 180 DEG C -220 DEG C, and external heating cluster heating power is kept to stablize；When liquid gold
After category sodium enters heating system, high-power heaters at different levels are opened, control heating power slowly increases；According to sodium outlet temperature with
Declared working condition temperature gap adjusts high-power heater power at different levels, until liquid metal sodium is heated to required power；Work as heating
When system needs to close, successively close the first high-power heater 1, the second high-power heater 2, and so on, close all
High-power heater keeps heating power constant, after all metallic sodiums are from heating system emptying, stop heating, keeps simultaneously
Nitrogen protection.
The above content is a further detailed description of the present invention in conjunction with specific preferred embodiments, and it cannot be said that
A specific embodiment of the invention is only limitted to this, for those of ordinary skill in the art to which the present invention belongs, is not taking off
Under the premise of from present inventive concept, several simple deduction or replace can also be made, all shall be regarded as belonging to the present invention by institute
Claims of submission determine scope of patent protection.
Claims (8)
1. a kind of radiant type liquid metal sodium high power heating system, it is characterised in that: go out including an entrance Trunk Line, one
Mouth Trunk Line, multiple high-power heaters being connected in parallel；Liquid metal sodium enters heating system, initially enters entrance Trunk Line
On first three-way interface, first threeway first outlet be connected to the first high-power heater by first entrance valve (201)
(1), the first high-power heater (1) outlet connection first outlet valve (301), first outlet valve (301) connection outlet Trunk Line,
First threeway second outlet is directly connected to second three-way interface, and subsequent pipeline connects other high powers with identical structure and heats
The outlet fluid of device, multiple high-power heaters imports outlet Trunk Line via multiple outlet valves, and sodium inlet and outlet are respectively disposed with
Thermocouple measurement sodium temperature；Above first high-power heater (1), first entrance valve (201), first outlet valve (301) constitute the
One heating unit；It is single that second high-power heater (2), second entrance valve (202), second outlet valve (302) constitute the second heating
Member, and so on, multiple heating units are constituted, the structure and flow of each heating unit are all the same；Each heating unit exists
Outer layer covers heat-preservation cotton, when starting, make entire heating unit temperature reach the freezing point of sodium or more, caused by preventing the solidification of sodium
Pipeline jam accident；It further include the PLC control cabinet being connect with each high-power heater and control system (5).
2. a kind of radiant type liquid metal sodium high power heating system according to claim 1, it is characterised in that: the height
The quantity of power heater is four, respectively the first high-power heater (1), the second high-power heater (2), third Gao Gong
Rate heater (3) and the 4th high-power heater (4), the power of each high-power heater are 5MW, total 20MW.
3. a kind of radiant type liquid metal sodium high power heating system according to claim 1, it is characterised in that: described more
A high-power heater structure being connected in parallel is all the same, wherein the first high-power heater (1) includes heater housings
(105), inlet flange (101) and the entrance main pipeline (104) being connected with inlet flange (101), outlet(discharge) flange (114) and with go out
The connected outlet main pipeline (113) of mouth flange (114) connects entrance main pipeline (104) and exports the door shape of main pipeline (113)
It restrains (110), is separately positioned on inside and outside inside heating cluster (108) of door shape tube bank (110) and external heating rod
Beam (109)；The both ends of door shape tube bank (110) are respectively welded on entrance main pipeline (104) and outlet main pipeline (113)；Institute
Stating door shape tube bank (110) is several door shape pipelines along main pipeline direction parallel arrangement, fluid enter after main pipeline
It shunts in flow process into door shape tube bank, is heated wherein；Internal heating cluster (108) and external heating cluster
(109) be door shape single tube bank arranged in parallel, be arranged in door shape tube bank (110) it is inside and outside, away from door word
Shape tube bank (110) has a distance, passes through the fluid in radiation heat transfer heating tube bundle；Above-mentioned entrance main pipeline (104), outlet master
Pipeline (113), door shape tube bank (110), internal heating cluster (108) and external heating cluster (109) are all disposed within heater
In shell (105), support grid (107) is disposed in heater housings (105) to door shape tube bank (110), internal heating rod
Beam (108) and external heating cluster (109) are supported；The entrance main pipeline (104) and outlet main pipeline (113) inlet
Be arranged with temperature thermocouple (103) and empty hole (102), temperature thermocouple (103) be used to HEATER FOR MEASURING in fluid into
Outlet temperature empties hole and is used to remaining fluid in drained heater；Heater housings (105) disposed outside has nitrogen charging mouth
(112), gas vent (106) and instrument junction box (111).
4. a kind of radiant type liquid metal sodium high power heating system according to claim 3, it is characterised in that: it is described enter
Mouth main pipeline (104) and outlet main pipeline (113) are the circular pipe that diameter is DN200.
5. a kind of radiant type liquid metal sodium high power heating system according to claim 3, it is characterised in that: the door
The diameter that font restrains (110) is DN25.
6. a kind of radiant type liquid metal sodium high power heating system according to claim 1, it is characterised in that: described more
A high-power heater adjusts heating power using PLC control cabinet and control system (5), and the power of each high-power heater is equal
It can individually adjust, to meet requirement of the different tests condition to outlet sodium temperature.
7. a kind of radiant type liquid metal sodium high power heating system according to claim 1, it is characterised in that: all
Inlet valve, outlet valve are all made of electric control valve, all temperature, pressure signal by data collection system acquisition, adjust and
Analysis；PLC control cabinet and control system (5) setting sodium outlet temperature and heating power feed back, by sodium outlet temperature with it is specified
Working temperature difference adjusts high-power heater power at different levels, realizes the auto-adjustment control of outlet temperature.
8. the heating means of the described in any item radiant type liquid metal sodium high power heating systems of claim 1 to 7, feature
It is: specific heating means are as follows: the inlet valve and outlet valve for first turning on all high-power heaters take out heating system
It is vacuum-treated, nitrogen is filled with into system to required pressure by the nitrogen charging mouth of each high-power heater and is maintained；It opens and respectively adds
Cluster is heated outside the high-power heater of hot cell, so that the high-power heater of each heating unit, inlet valve and outlet valve
And line temperature reaches within the scope of 180 DEG C -220 DEG C, and external heating cluster heating power is kept to stablize；Work as liquid metal sodium
Into after heating system, high-power heaters at different levels are opened, control heating power slowly increases；According to sodium outlet temperature with it is specified
Working temperature difference adjusts high-power heater power at different levels, until liquid metal sodium is heated to required power；Work as heating system
When needing to close, successively close the first high-power heater (1), the second high-power heater (2), and so on, close all
High-power heater keeps heating power constant, after all metallic sodiums are from heating system emptying, stop heating, keeps simultaneously
Nitrogen protection.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910074447.6A CN109855282B (en) | 2019-01-25 | 2019-01-25 | Radiation type high-power heating system and heating method for liquid metal sodium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910074447.6A CN109855282B (en) | 2019-01-25 | 2019-01-25 | Radiation type high-power heating system and heating method for liquid metal sodium |
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| CN109855282B CN109855282B (en) | 2020-01-21 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322680A (en) * | 2011-07-15 | 2012-01-18 | 西安交通大学 | Liquid metal sodium experimental loop electrical heating preheater |
| JP2014114977A (en) * | 2012-12-07 | 2014-06-26 | Fukujiro Ukawa | Multi-stage high temperature heat storage tank device |
| CN107062587A (en) * | 2017-04-20 | 2017-08-18 | 西安交通大学 | A kind of high-power preheater for liquid-state metallic sodium experiment loop |
| CN108286799A (en) * | 2018-01-15 | 2018-07-17 | 西安交通大学 | A kind of liquid metal sodium high power heating system and its adjusting method |
-
2019
- 2019-01-25 CN CN201910074447.6A patent/CN109855282B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102322680A (en) * | 2011-07-15 | 2012-01-18 | 西安交通大学 | Liquid metal sodium experimental loop electrical heating preheater |
| JP2014114977A (en) * | 2012-12-07 | 2014-06-26 | Fukujiro Ukawa | Multi-stage high temperature heat storage tank device |
| CN107062587A (en) * | 2017-04-20 | 2017-08-18 | 西安交通大学 | A kind of high-power preheater for liquid-state metallic sodium experiment loop |
| CN108286799A (en) * | 2018-01-15 | 2018-07-17 | 西安交通大学 | A kind of liquid metal sodium high power heating system and its adjusting method |
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