CN205002645U - A new type heat exchanger for fused salt medium - Google Patents
A new type heat exchanger for fused salt medium Download PDFInfo
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- CN205002645U CN205002645U CN201520702829.6U CN201520702829U CN205002645U CN 205002645 U CN205002645 U CN 205002645U CN 201520702829 U CN201520702829 U CN 201520702829U CN 205002645 U CN205002645 U CN 205002645U
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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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Abstract
The utility model relates to a new type heat exchanger for fused salt medium, heat conduction material layer in the middle of the spiral pipe that the inner tube of flowing through including the fused salt medium and unsaturated aqueous medium were flowed through, space between inner tube and the spiral pipe are equipped with, wrap up in the spiral pipe outer wall completely on middle heat conduction material layer, the outside on middle heat conduction material layer is equipped with interior protection tube, interior protection tube be used for holding support in the middle of the heat conduction material layer including, the outer wall of protection tube be equipped with the insulation material layer, the outside on insulation material layer is equipped with whole outer jacket. The utility model discloses ability simple structure, reasonable in design effectively reduce the stifled risk of freezing that fused salt viscosity rises and leads to along with the drop in temperature, have reduced heat and loss of pressure that long distance transportation brought, and while unique cast design improves the heat transfer area on the unit length, can make each state water, steam produce secondary circulation when mobile on the cross -section, and be mixed more abundant, reinforcing heat transmission effect.
Description
Technical field
The utility model relates to a kind of new type heat exchanger for fused-salt medium, belongs to photo-thermal power generation technical field.
Background technology
Current photo-thermal power generation field is heat-storage medium with the solar power station of heat storage function with fused salt, by converging sunlight fused salt heat dump, temperature of molten salt is made to increase, again fused salt is imported store heat in heat storage can, by heat exchanger, the heat in fused salt is converted to the heat of Rankine cycle working medium, general employing water is as the working medium of Rankine cycle, and aqueous water absorbs heat and becomes the generating of superheated steam pushing turbine in heat exchanger.Fused salt is in traditional heat exchanger and the flowing of intermediate heat transfer pipe thereof, and fused salt heat exchanging device is more of paramount importance is exactly prevent temperature too low, frozen block occurs, but each type heat exchanger does not all design improvement accordingly instantly.The heat exchanger that current photo-thermal power generation technology adopts is traditional shell-and-tube heat exchanger, comprises conduction oil-water, fused salt-water, water-water heat exchange etc.It is pretty good for liquid-liquid or liquid-gas converting heat effect, but can not meet instructions for use completely for the heat exchange form of fused salt-water.Because fused salt (this sentences binary salt sodium nitrate potassium nitrate is example) fusing point is 207 DEG C, complete fusion temperature 238 DEG C, when fused salt just there will be solid crystals lower than 238 DEG C, reduce viscosity lower than 300 DEG C with temperature sharply to increase, due to the topology layout of shell-and-tube, the factor such as tube bank and housing, spacing between heat exchanger tube, no matter fused salt flowing pipe side or shell-side, all can cause fused salt wall built-up even frozen block; Dividing wall type heat exchanger form is unfavorable for that fused salt flows, easier frozen block; The mode that hybrid employing two heat transferring medium directly mixes, does not meet fused salt-water heat transfer requirements yet.For shell-and-tube heat exchanger, because adapter has size difference relative to housing, add the reaction time of heat power engineering system start and stop, when fused salt flowing pipe side, increase the pressure loss.Current shell-and-tube heat exchanger is applied to some extent in modularization, but for conventional combination, two heat exchanger superpositions only, three superposition more rare, mainly because heat exchanger intensity limit, or multiple stage heat exchanger same plane is arranged, but now no matter fused salt all needs external pipe to connect at shell-side or pipe side, therefore must there is the minimum point of external pipe, the emptying of fused salt during system closing is affected greatly.So flexibility, the modularization of conventional tube shell heat exchanger meet the demands in traditional field, but be used in fused salt be medium photo-thermal power generation field also have more defect.The replacing heat-exchange tube cycle in conventional tube shell heat exchanger is shorter, cost of equipment maintenance is higher, for photo-thermal power generation field, due to the frequency of heat power engineering system start and stop, the heat exchanger tube life-span can be shorter, and therefore conventional tube shell heat exchanger can not be satisfactory in service life.
Utility model content
The purpose of this utility model is: can not meet existing needs for current technology, a kind of new type heat exchanger for fused-salt medium is provided, fused salt viscosity with temperature can be effectively reduced to decline and the frozen block risk caused that rises, reduce heat and the pressure loss that long distance delivery brings, simultaneously unique tube type design improves the heat exchange area in unit length, each state water, steam can be made on cross section, to produce secondary circulation when flowing, and mixing is more abundant, strengthens heat-transfer effect.
The technical scheme that the utility model adopts is: a kind of new type heat exchanger for fused-salt medium; comprise interior pipe that fused-salt medium flows through and the helix tube that unsaturated aqueous medium flows through; space between interior pipe and helix tube is provided with intermediate thermal conductivity material layer; intermediate thermal conductivity material layer is wrapped in helix tube outer wall completely; the outside of intermediate thermal conductivity material layer is provided with interior protection tube; interior protection tube supports intermediate thermal conductivity material layer for holding; be provided with adiabator layer at the outer wall of interior protection tube, the outside of adiabator layer is provided with overall outer jacket.
In the utility model: described intermediate thermal conductivity material layer is made up of concrete or thermal conductive sand, and described adiabator layer is made up of silica or aluminium silicate wool, described overall outer jacket is made up of environmental protection magnesium steel or color steel.
In the utility model: the caliber of described interior pipe is greater than the caliber of helix tube, the two pipe diameter size need be determined according to concrete thermic load, helix tube is wound around and the outer wall interval 1mm-2mm of helix tube and interior pipe along interior pipe, and wherein the sandblasting of helix tube inwall or turning go out helical form pipeline.
In the utility model: the outer tube wall of described interior pipe, helix tube and interior protection tube is equipped with independent rack, for ensureing its mutual distance, unlikely extruding of subsiding.
In the utility model: described independent rack is all fixed on and supports on mould bases, and the below supporting mould bases is provided with mould bases base.
The beneficial effects of the utility model:
1. good circulation when pipe adopts the straight tube of Large Diameter Pipeline to ensure that fused salt flows when system cold start-up in, and whole heat transfer process does not need to change pipe diameter size, there is not the weak spot of the easy frozen block of fused salt when pipe for shell-and-tube exchanger side in heat transfer process, owing to adopting Large Diameter Pipeline, fused salt can meet the requirement of long distance delivery, and after need not worrying long distance delivery, whether heat exchanger inlet pressure meets the demands;
2. helix tube adopts and helical structure like spring-like, thus improves the heat exchange area in unit length, and this helicoidal structure can make each state water, steam on cross section, produce secondary circulation when flowing, and mixing is more abundant, strengthens heat-transfer effect;
3. in helix tube, sandblasting or turning go out helical form pipeline, enable each state water, situation that tube wall heat transfer coefficient that steam effectively avoids film boiling to cause reduces;
4. helix tube is wound around along interior pipe, helix tube does not contact with the outer wall of interior pipe, prevent helix tube be heated axial expansion time and interior pipe occur to rub and the tube wall that weares and teares, the intermediate thermal conductivity material layer of filling between two pipes has mobility, ensure two pipe by once, secondary stress time can be out of shape by free-extension;
5. in service life, helix tube and interior Guan Junneng meet pressure pipeline standard, i.e. 15 year service life, and the life-span than conventional tube shell-type heat-exchanging tube bundle improves a lot;
6. insulation adopts ducted complex heat-preservation form, reduces insulation thickness, improves economy, and this heat exchanger can extensive use on the power station of the common use fused salt such as tower, slot type, butterfly, linear luxuriant and rich with fragrance Neil formula or similar mediums simultaneously.
Accompanying drawing explanation
Fig. 1 is local delamination sectional view of the present utility model;
Fig. 2 is heat exchanger tube Local map of the present utility model;
Fig. 3 is the structural representation of independent rack in the utility model.
Wherein: 1. pipe in; 2. helix tube; 3. intermediate thermal conductivity material layer; 4. protection tube in; 5. adiabator layer; 6. overall outer jacket; 7. independent rack; 8. support mould bases; 9. mould bases base.
Detailed description of the invention
Below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
As illustrated in fig. 1 and 2; a kind of new type heat exchanger for fused-salt medium; comprise interior pipe 1 that fused-salt medium flows through and the helix tube 2 that unsaturated aqueous medium flows through; space between interior pipe 1 and helix tube 2 is provided with intermediate thermal conductivity material layer 3; intermediate thermal conductivity material layer 3 is wrapped in helix tube 2 outer wall completely; the outside of intermediate thermal conductivity material layer 3 is provided with interior protection tube 4; interior protection tube 4 supports intermediate thermal conductivity material layer 3 for holding; be provided with adiabator layer 5 at the outer wall of interior protection tube 4, the outside of adiabator layer 5 is provided with overall outer jacket 6.Described intermediate thermal conductivity material layer 3 is made up of concrete or thermal conductive sand, and described adiabator layer 5 is made up of silica or aluminium silicate wool, and described overall outer jacket 6 is made up of environmental protection magnesium steel or color steel; The caliber of described interior pipe 1 is greater than the caliber of helix tube 2, the two pipe diameter size need be determined according to concrete thermic load, helix tube 2 is wound around and the outer wall interval 1mm-2mm of helix tube 2 and interior pipe 1 along interior pipe 1, and wherein helix tube 2 inwall sandblasting or turning go out helical form pipeline; Described interior pipe 1, helix tube 2 and interior protection tube 4 are equipped with independent rack 7, for ensureing its mutual distance, and unlikely extruding of subsiding; Described independent rack 7 is all fixed on and supports on mould bases 8, and the below supporting mould bases 8 is provided with mould bases base 9.
Because this type heat exchanger is overall and seemingly pipeline-like; the form of pipeline laying can be mainly adopted to install; such as high, normal, basic installation with hanger is installed; or directly buried installation is installed; no matter take any installation form; two heat exchanger tubes (interior pipe and helix tube) and interior protection tube all have relatively independent strutting means, ensure stressed between different assembly after intensity and toughness requirement, and material be heated after can free-extension.
Because photo-thermal power generation ground utilization rate is higher, the fact that the sunshine collected is more, often heat power engineering system arrangement space is comparatively limited, this type heat exchanger appearance and size is less, flexible arrangement, has innate advantage, when some are very special, can realize being interrupted and install, and can not the total heat exchange efficiency of influential system.
The fused salt heat exchanging device in photo-thermal power generation field can not only reach the heat transfer effect of traditional heat exchangers, also can meet the requirement of heat power engineering system salt discharge, for the place having the discrepancy in elevation, utilize the discrepancy in elevation, and local adopts gentle transition design, can accomplish to rely on the automatic salt discharge of gravity; For the place without the discrepancy in elevation, rely on and change heat exchanger support height, omnidistance employing gentle slope design, also can realize automatic salt discharge; For the place not allowing to adopt omnidistance gentle slope to design, segmentation gentle slope can be taked to design, segmentation salt discharge.
Still allow to adopt the mode changed to transform heat exchanger after fused salt heat exchanging device puts into operation, by changing route, increase and decrease heat exchange area; By arranging bypass, increasing pipe fitting etc., accomplish to change control flow, facilitate end item docking etc., flexible and changeable change scheme requirement can be met.
Above detailed description of the invention of the present utility model is described, but the utility model is not limited to above description.For a person skilled in the art, any equal amendment to the technical program and substitute be all among scope of the present utility model.Therefore, not departing from the equalization conversion and amendment done under spirit and scope of the present utility model, all should be encompassed in scope of the present utility model.
Claims (5)
1. the new type heat exchanger for fused-salt medium; it is characterized in that: comprise interior pipe that fused-salt medium flows through and the helix tube that unsaturated aqueous medium flows through; space between interior pipe and helix tube is provided with intermediate thermal conductivity material layer; intermediate thermal conductivity material layer is wrapped in helix tube outer wall completely; the outside of intermediate thermal conductivity material layer is provided with interior protection tube; interior protection tube supports intermediate thermal conductivity material layer for holding, and be provided with adiabator layer at the outer wall of interior protection tube, the outside of adiabator layer is provided with overall outer jacket.
2. a kind of new type heat exchanger for fused-salt medium according to claim 1, it is characterized in that: described intermediate thermal conductivity material layer is made up of concrete or thermal conductive sand, described adiabator layer is made up of silica or aluminium silicate wool, and described overall outer jacket is made up of environmental protection magnesium steel or color steel.
3. a kind of new type heat exchanger for fused-salt medium according to claim 1, it is characterized in that: described interior pipe caliber be greater than the caliber of helix tube, helix tube is wound around and the outer wall interval 1mm-2mm of helix tube and interior pipe along interior pipe, and the sandblasting of helix tube inwall or turning go out helical form pipeline.
4. a kind of new type heat exchanger for fused-salt medium according to claim 1, is characterized in that: the outer tube wall of described interior pipe, helix tube and interior protection tube is equipped with independent rack, independent rack for ensureing its mutual distance, unlikely extruding of subsiding.
5. a kind of new type heat exchanger for fused-salt medium according to claim 4, is characterized in that: described independent rack is all fixed on and supports on mould bases, and the below supporting mould bases is provided with mould bases base.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520702829.6U CN205002645U (en) | 2015-09-11 | 2015-09-11 | A new type heat exchanger for fused salt medium |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520702829.6U CN205002645U (en) | 2015-09-11 | 2015-09-11 | A new type heat exchanger for fused salt medium |
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| Publication Number | Publication Date |
|---|---|
| CN205002645U true CN205002645U (en) | 2016-01-27 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201520702829.6U Active CN205002645U (en) | 2015-09-11 | 2015-09-11 | A new type heat exchanger for fused salt medium |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091650A (en) * | 2015-09-11 | 2015-11-25 | 江苏鑫晨光热技术有限公司 | Novel heat exchanger used for molten salt media |
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2015
- 2015-09-11 CN CN201520702829.6U patent/CN205002645U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091650A (en) * | 2015-09-11 | 2015-11-25 | 江苏鑫晨光热技术有限公司 | Novel heat exchanger used for molten salt media |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A new type of heat exchanger for molten salt medium Effective date of registration: 20200806 Granted publication date: 20160127 Pledgee: SUZHOU THVOW TECHNOLOGY LLC Pledgor: JIANGSU XINCHEN SOLAR THERMAL TECHNOLOGY Co.,Ltd. Registration number: Y2020980004731 |