CN217952236U - Solid heat storage and fused salt heat storage coupling system - Google Patents
Solid heat storage and fused salt heat storage coupling system Download PDFInfo
- Publication number
- CN217952236U CN217952236U CN202222270561.6U CN202222270561U CN217952236U CN 217952236 U CN217952236 U CN 217952236U CN 202222270561 U CN202222270561 U CN 202222270561U CN 217952236 U CN217952236 U CN 217952236U
- Authority
- CN
- China
- Prior art keywords
- molten salt
- heat storage
- heat
- heat exchanger
- solid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 136
- 238000005338 heat storage Methods 0.000 title claims abstract description 91
- 239000007787 solid Substances 0.000 title claims abstract description 66
- 230000008878 coupling Effects 0.000 title claims abstract description 17
- 238000010168 coupling process Methods 0.000 title claims abstract description 17
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 17
- 239000011449 brick Substances 0.000 claims description 18
- 238000005485 electric heating Methods 0.000 claims description 15
- 238000003860 storage Methods 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 11
- 238000010438 heat treatment Methods 0.000 abstract description 6
- 238000009825 accumulation Methods 0.000 description 21
- 238000000034 method Methods 0.000 description 9
- 239000011232 storage material Substances 0.000 description 4
- CPLXHLVBOLITMK-UHFFFAOYSA-N Magnesium oxide Chemical compound [Mg]=O CPLXHLVBOLITMK-UHFFFAOYSA-N 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000395 magnesium oxide Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Other Air-Conditioning Systems (AREA)
Abstract
The utility model discloses a solid heat storage and fused salt heat storage coupling system, which comprises a low-temperature fused salt tank, a low-temperature fused salt pump, a high-temperature fused salt tank, a high-temperature fused salt pump, a first heat exchanger, a second heat exchanger, a fan and a solid heat storage unit; a molten salt outlet of the low-temperature molten salt pump is connected with a cold source inlet of the second heat exchanger, and a cold source outlet of the second heat exchanger is connected with the high-temperature molten salt tank; a molten salt outlet of the high-temperature molten salt pump is connected with a heat source inlet of the first heat exchanger, and a heat source outlet of the first heat exchanger is connected with the low-temperature molten salt tank; an air outlet of the solid heat storage unit is connected with a heat source inlet of the second heat exchanger, a heat source outlet of the second heat exchanger is connected with an inlet of the fan, and an outlet of the fan is connected with an air inlet of the solid heat storage unit. The utility model discloses well fused salt heat storage technology's use for system output high temperature high pressure steam becomes possible, and the use of solid heat storage technology makes the high voltage heating realize.
Description
Technical Field
The utility model belongs to the technical field of solid heat accumulation and fused salt heat accumulation, especially, relate to a solid heat accumulation and fused salt heat accumulation coupled system.
Background
Solid heat storage and molten salt heat storage are two common electric heat storage technologies, and the two technologies have advantages and disadvantages respectively.
The solid heat storage technology uses a solid heat storage material (generally, magnesia brick) as a heat storage material. The heat storage material has the remarkable advantages of good insulating property, good heat conductivity, high temperature resistance, low price and the like, so that the solid heat storage technology is widely applied to industrial production, an enterprise heats the heat storage bricks by utilizing valley electricity at night to store heat energy, and releases the heat energy in the daytime, and the electric charge of the enterprise can be effectively saved. The solid heat storage system has the advantages of low cost, capability of directly heating by using high voltage and the like; but it cannot output high temperature and high pressure steam (above 300 deg.c) due to structural limitations.
The molten salt heat storage technology uses molten salt (binary molten salt or ternary molten salt) as a heat storage material. The fused salt is used as a good high-temperature heat transfer medium, can output high-temperature high-pressure steam (up to 550 ℃), and is particularly suitable for power generation. Therefore, the fused salt heat storage technology is widely applied to the field of solar photo-thermal. However, the molten salt heat storage technology is complicated and therefore high in cost. And because the fused salt has conductivity, there is very high technical difficulty in using high voltage to heat the fused salt.
Disclosure of Invention
An object of the utility model is to provide a solid heat accumulation and fused salt heat accumulation coupled system fuses solid heat accumulation technique and fused salt heat accumulation technique mutually, can not only realize high voltage input, can export steam for high temperature high pressure electricity generation moreover.
In order to solve the technical problem, the utility model discloses a realize through following technical scheme:
a solid heat storage and molten salt heat storage coupling system comprises a low-temperature molten salt tank, a low-temperature molten salt pump, a high-temperature molten salt tank, a high-temperature molten salt pump, a first heat exchanger, a second heat exchanger, a fan and a solid heat storage unit; a molten salt outlet of the low-temperature molten salt pump is connected with a cold source inlet of the second heat exchanger through a first pipeline, and a cold source outlet of the second heat exchanger is connected with the high-temperature molten salt tank through a second pipeline; a molten salt outlet of the high-temperature molten salt pump is connected with a heat source inlet of the first heat exchanger through a third pipeline, and a heat source outlet of the first heat exchanger is connected with the low-temperature molten salt tank through a fourth pipeline; an air outlet of the solid heat storage unit is connected with a heat source inlet of the second heat exchanger through a fifth pipeline, a heat source outlet of the second heat exchanger is connected with an inlet of the fan through a sixth pipeline, and an outlet of the fan is connected with an air inlet of the solid heat storage unit through a seventh pipeline.
Furthermore, the solid heat storage and molten salt heat storage coupling system, the low-temperature molten salt pump and the high-temperature molten salt pump are both submerged pumps.
Further, the solid heat storage and fused salt heat storage coupling system comprises a solid heat storage brick and an electric heating pipe, wherein the solid heat storage brick and the electric heating pipe are arranged inside the solid heat storage unit, a groove is formed in the heat storage brick, and the electric heating pipe is arranged in the groove.
Further, in the solid heat storage and molten salt heat storage coupling system, the first heat exchanger is a group formed by connecting a plurality of heat exchangers in parallel or in series.
Further, in the solid heat storage and molten salt heat storage coupling system, the second heat exchanger is a group formed by connecting a plurality of heat exchangers in parallel or in series.
The utility model provides an inside of solid heat accumulation unit is provided with solid heat accumulation brick and electric heating pipe, and electric heating pipe not only can be placed to the recess that sets up on the heat accumulation brick, but also can constitute air flow channel. The input voltage of the electric heating tube can be low voltage (220V/380V) or high voltage (6 kV/10kV/35 kV).
In the solid heat storage and molten salt heat storage coupling system provided by the embodiment, the low-temperature molten salt tank, the low-temperature molten salt pump, the second heat exchanger and the high-temperature molten salt tank are sequentially connected through the molten salt pipeline to form a molten salt flow channel; the high-temperature molten salt tank, the high-temperature molten salt pump, the first heat exchanger and the low-temperature molten salt tank are sequentially connected through a molten salt pipeline to form another molten salt flow channel; the solid heat storage unit, the second heat exchanger and the fan are connected through air pipes to form an air circulation flow channel.
The utility model provides a solid heat accumulation and fused salt heat accumulation coupled system has following beneficial effect for prior art:
(1) The utility model discloses effectively combine solid heat accumulation technique and fused salt heat accumulation technique, the advantage separately of two kinds of heat-retaining techniques of performance can realize high voltage (6 kV 10kV 35kV etc.) input and high temperature high pressure steam (the highest 550 ℃) output.
(2) The utility model discloses there is twice exothermal process, and the first is that the fused salt heat storage system is exothermic, and the second is that the solid heat storage system is exothermic. The solid heat storage system not only plays a role of heating the molten salt, but also stores partial heat energy, thereby reducing the scale of the molten salt system and saving the investment cost.
Of course, it is not necessary for any particular product to achieve all of the above-described advantages at the same time.
Drawings
Fig. 1 is a schematic diagram of a solid thermal storage and molten salt thermal storage coupling system provided in an embodiment.
Fig. 2 is a schematic structural view of a solid heat storage unit provided in the embodiment.
In the figure 1-2, 1-low temperature molten salt tank, 2-low temperature molten salt pump, 3-high temperature molten salt tank, 4-high temperature molten salt pump, 5-first heat exchanger, 6-second heat exchanger, 7-fan pump, 8-solid heat storage unit, 81-heat storage brick, 82-electric heating pipe.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without making creative efforts belong to the protection scope of the present invention.
Examples
As shown in fig. 1, the present embodiment provides a solid heat storage and molten salt heat storage coupling system, which includes a low-temperature molten salt tank 1, a low-temperature molten salt pump 2, a high-temperature molten salt tank 3, a high-temperature molten salt pump 4, a first heat exchanger 5, a second heat exchanger 6, a fan 7, and a solid heat storage unit 8; a molten salt outlet of the low-temperature molten salt pump 2 is connected with a cold source inlet of the second heat exchanger 6 through a first pipeline, and a cold source outlet of the second heat exchanger 6 is connected with the high-temperature molten salt tank 3 through a second pipeline; a molten salt outlet of the high-temperature molten salt pump 4 is connected with a heat source inlet of the first heat exchanger 5 through a third pipeline, and a heat source outlet of the first heat exchanger 5 is connected with the low-temperature molten salt tank 1 through a fourth pipeline; an air outlet of the solid heat storage unit 8 is connected with a heat source inlet of the second heat exchanger 6 through a fifth pipeline, a heat source outlet of the second heat exchanger 6 is connected with an inlet of the fan 7 through a sixth pipeline, and an outlet of the fan 7 is connected with an air inlet of the solid heat storage unit 8 through a seventh pipeline.
The low-temperature molten salt pump 2 is a submerged pump and is arranged at the top of the low-temperature molten salt tank 1; the high-temperature molten salt pump 4 is a submerged pump and is arranged at the top of the high-temperature molten salt tank 3.
As shown in fig. 2, a solid heat storage brick 81 and an electric heating pipe 82 are arranged inside the solid heat storage unit 8, a groove is formed in the heat storage brick 81, the electric heating pipe 82 is arranged in the groove, the grooves of adjacent solid heat storage bricks 81 are oppositely arranged, an air flow channel can be formed through the grooves, and the electric heating pipe 82 arranged in the groove can better conduct heat. The input voltage of the electric heating tube 82 can be low voltage (220V/380V) or high voltage (6 kV/10kV/35 kV). In the solid heat storage and molten salt heat storage coupling system provided by the embodiment, the low-temperature molten salt tank 1, the low-temperature molten salt pump 2, the second heat exchanger 6 and the high-temperature molten salt tank 3 are sequentially connected through a molten salt pipeline to form a molten salt flow channel; the high-temperature molten salt tank 3, the high-temperature molten salt pump 4, the first heat exchanger 5 and the low-temperature molten salt tank 1 are sequentially connected through a molten salt pipeline to form another molten salt flow channel; the solid heat storage unit 8, the second heat exchanger 6 and the fan 7 are connected through air pipes to form an air circulation flow channel.
In some embodiments, the first heat exchanger 5 may be a group of a plurality of heat exchangers connected in parallel or in series, and the second heat exchanger 6 may also be a group of a plurality of heat exchangers connected in parallel or in series.
The utility model provides a solid heat accumulation and fused salt heat accumulation coupled system has combined the advantage separately of solid heat accumulation technique and fused salt heat accumulation technique. The use of the molten salt heat storage technology makes the system output high-temperature and high-pressure steam possible; the use of solid heat storage technology enables high voltage heating to be achieved. On the other hand, the solid heat storage system not only plays a role of heating the molten salt, but also stores partial heat energy, so that the scale of the molten salt system is reduced, and the investment cost is saved.
The utility model provides a solid heat accumulation and fused salt heat accumulation coupled system's work flow as follows:
during heat storage, the electric heating pipes 82 in the solid heat storage unit 8 are firstly started, and when the temperature of the heat storage bricks rises to the required temperature (such as 600 ℃), the low-temperature molten salt pump 2 and the fan 7 are started. The low-temperature molten salt pump 2 sends the low-temperature molten salt (such as 290 ℃) in the low-temperature molten salt tank 1 to a cold source inlet of the second heat exchanger 6, and the low-temperature molten salt exchanges heat with hot air from a heat source inlet of the second heat exchanger 6 and then becomes high-temperature molten salt (560 ℃) to flow into the high-temperature molten salt tank 3 for storage. Meanwhile, the hot air flows out from the heat source outlet of the second heat exchanger 6 after being cooled, then flows into the inlet of the fan 7, then flows out from the outlet of the fan 7, and finally flows into the air inlet of the solid heat storage unit 8 again. In the heat storage process, the rotating speeds of the low-temperature molten salt pump 2 and the fan 7 are adjusted, and the temperatures of the heat storage bricks and the molten salt are controlled. When the heat is fully stored, the temperature of the heat storage bricks is increased to a set temperature (such as 750 ℃), and the molten salt is heated to the set temperature (such as 560 ℃) and stored in the high-temperature molten salt tank 3, and at the moment, the electric heating pipe 82, the fan 7 and the low-temperature molten salt pump 2 are closed.
When heat is released, the high-temperature molten salt pump 4 is started firstly, high-temperature molten salt (such as 560 ℃) is pumped to a heat source inlet of the first heat exchanger 5 to exchange heat with external feed water, and high-temperature high-pressure steam (such as 550 ℃ and 100 bar) is generated for power generation. The high-temperature molten salt is cooled to low-temperature molten salt (290 ℃), flows out from a heat source outlet of the first heat exchanger 6, and then flows into the low-temperature molten salt tank 1 for storage. After the liquid level of the high-temperature molten salt tank 3 falls to the lowest position, which indicates that the heat release of the molten salt heat storage system is completed, the low-temperature molten salt pump 2 and the fan 7 are started at the moment, the heat storage amount of the solid heat storage unit 8 is used for heating the low-temperature molten salt, and the temperature of the heat storage bricks 81 is gradually reduced. When the temperature of the heat storage bricks 81 is reduced to the set temperature (for example, 600 ℃), the heat stored in the solid heat storage unit 8 is released.
In the description herein, references to the description of "one embodiment," "an example," "a specific example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The preferred embodiments of the present invention disclosed above are intended only to help illustrate the present invention. The preferred embodiments are not intended to be exhaustive or to limit the invention to the precise embodiments disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and its practical applications, thereby enabling others skilled in the art to best understand the invention and its practical application. The present invention is limited only by the claims and their full scope and equivalents.
Claims (5)
1. The solid heat storage and molten salt heat storage coupling system is characterized by comprising a low-temperature molten salt tank (1), a low-temperature molten salt pump (2), a high-temperature molten salt tank (3), a high-temperature molten salt pump (4), a first heat exchanger (5), a second heat exchanger (6), a fan (7) and a solid heat storage unit (8); a molten salt outlet of the low-temperature molten salt pump (2) is connected with a cold source inlet of the second heat exchanger (6) through a first pipeline, and a cold source outlet of the second heat exchanger (6) is connected with the high-temperature molten salt tank (3) through a second pipeline; a molten salt outlet of the high-temperature molten salt pump (4) is connected with a heat source inlet of the first heat exchanger (5) through a third pipeline, and a heat source outlet of the first heat exchanger (5) is connected with the low-temperature molten salt tank (1) through a fourth pipeline; an air outlet of the solid heat storage unit (8) is connected with a heat source inlet of the second heat exchanger (6) through a fifth pipeline, a heat source outlet of the second heat exchanger (6) is connected with an inlet of the fan (7) through a sixth pipeline, and an outlet of the fan (7) is connected with an air inlet of the solid heat storage unit (8) through a seventh pipeline.
2. The solid and molten salt thermal storage coupling system of claim 1, wherein the low temperature molten salt pump (2) and the high temperature molten salt pump (4) are submerged pumps.
3. A solid heat storage and molten salt heat storage coupling system according to claim 1, characterized in that the solid heat storage unit (8) comprises internally arranged solid heat storage bricks (81) and electric heating pipes (82), the heat storage bricks (81) being provided with grooves, the electric heating pipes (82) being arranged in the grooves.
4. The solid and molten salt thermal storage coupling system of claim 1, wherein the first heat exchanger (5) is a group of multiple heat exchangers connected in parallel or in series.
5. The solid heat storage and molten salt heat storage coupling system of claim 1, characterized in that the second heat exchanger (6) is a group of multiple heat exchangers connected in parallel or in series.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222270561.6U CN217952236U (en) | 2022-08-29 | 2022-08-29 | Solid heat storage and fused salt heat storage coupling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222270561.6U CN217952236U (en) | 2022-08-29 | 2022-08-29 | Solid heat storage and fused salt heat storage coupling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217952236U true CN217952236U (en) | 2022-12-02 |
Family
ID=84211765
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222270561.6U Active CN217952236U (en) | 2022-08-29 | 2022-08-29 | Solid heat storage and fused salt heat storage coupling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217952236U (en) |
-
2022
- 2022-08-29 CN CN202222270561.6U patent/CN217952236U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204187875U (en) | A kind of energy storage type solar hot-water boiler adopting heat-conducting oil | |
| CN206957774U (en) | A kind of compressed air energy storage power generating system using fuse salt accumulation of heat | |
| CN107894020A (en) | A kind of paddy electricity heat accumulating and heating device with far infrared electric heating apparatus | |
| CN217952236U (en) | Solid heat storage and fused salt heat storage coupling system | |
| CN207584863U (en) | A kind of paddy electricity heat accumulating and heating device with far infrared electric heating apparatus | |
| CN109098881A (en) | Plate-type heat-exchange engine | |
| CN2529145Y (en) | Split pressure-bearing solar water heater with all-glass vacuum pipe | |
| CN115264563A (en) | Heat storage peak regulation and energy-saving steam supply thermodynamic system | |
| CN216113966U (en) | Photo-thermal steam supply system based on phase change heat storage | |
| CN106369848B (en) | A kind of splitting solar hot-water heating system | |
| CN213932148U (en) | Heat exchanger of air source heat pump water heater | |
| CN214148132U (en) | Pipeline heat accumulating type air source heat pump secondary heating hot water system | |
| CN108534222A (en) | A kind of molten salt energy-storage heating system with fused salt static mixer | |
| CN207610262U (en) | Solar-powered-air source heat-pump-phase transition thermal storage water tank heating system | |
| CN211781378U (en) | Heating system of phase-change valley electricity heat storage coupling water source heat pump | |
| CN115506860A (en) | Thermal power generating unit system based on fused salt heat storage and air compression cycle coupling | |
| CN217080923U (en) | Direct replacement heat conduction oil type temperature rise and fall temperature control system | |
| CN210425211U (en) | Heat supply system with multiple clean heat sources and taking heat storage coupler as structure center | |
| CN216790134U (en) | Fused salt heat storage coupling pure condensation thermal power unit system capable of realizing zero output | |
| CN204358983U (en) | The urgent cooling protection system of solar thermal collector | |
| CN219828793U (en) | Boiler power generation system | |
| CN215638083U (en) | Novel heat exchange system | |
| CN217816968U (en) | Heat storage peak regulation and energy-saving steam supply thermodynamic system | |
| CN212930462U (en) | Multisource combination heat pump system | |
| CN219776447U (en) | Steam heating single-tank molten salt heat storage system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| PE01 | Entry into force of the registration of the contract for pledge of patent right |
Denomination of utility model: A Coupled System of Solid Heat Storage and Molten Salt Heat Storage Granted publication date: 20221202 Pledgee: China Construction Bank Corporation Nanjing Zhongyangmen sub branch Pledgor: JIANGSU ZHONGKE ZHICHU TECHNOLOGY CO.,LTD. Registration number: Y2024980003258 |
|
| PE01 | Entry into force of the registration of the contract for pledge of patent right |