CN109386972A - A kind of multiple tank fused salt hold over system of compressed gas and pump for liquid salts coupling driving - Google Patents
A kind of multiple tank fused salt hold over system of compressed gas and pump for liquid salts coupling driving Download PDFInfo
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- CN109386972A CN109386972A CN201811339887.1A CN201811339887A CN109386972A CN 109386972 A CN109386972 A CN 109386972A CN 201811339887 A CN201811339887 A CN 201811339887A CN 109386972 A CN109386972 A CN 109386972A
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- 150000003839 salts Chemical class 0.000 title claims abstract description 384
- 230000008878 coupling Effects 0.000 title claims abstract description 14
- 238000010168 coupling process Methods 0.000 title claims abstract description 14
- 238000005859 coupling reaction Methods 0.000 title claims abstract description 14
- 239000007788 liquid Substances 0.000 title claims abstract 12
- 238000000034 method Methods 0.000 claims abstract description 10
- 238000002844 melting Methods 0.000 claims abstract 17
- 230000008018 melting Effects 0.000 claims abstract 17
- 239000007789 gas Substances 0.000 claims description 50
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 6
- 229910052757 nitrogen Inorganic materials 0.000 claims description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 3
- 238000009434 installation Methods 0.000 claims description 2
- YNPNZTXNASCQKK-UHFFFAOYSA-N phenanthrene Chemical compound C1=CC=C2C3=CC=CC=C3C=CC2=C1 YNPNZTXNASCQKK-UHFFFAOYSA-N 0.000 claims 2
- 229910052934 alunite Inorganic materials 0.000 claims 1
- 239000010424 alunite Substances 0.000 claims 1
- KPZTWMNLAFDTGF-UHFFFAOYSA-D trialuminum;potassium;hexahydroxide;disulfate Chemical compound [OH-].[OH-].[OH-].[OH-].[OH-].[OH-].[Al+3].[Al+3].[Al+3].[K+].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O KPZTWMNLAFDTGF-UHFFFAOYSA-D 0.000 claims 1
- 238000004519 manufacturing process Methods 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract 1
- 239000006096 absorbing agent Substances 0.000 description 12
- 230000006835 compression Effects 0.000 description 7
- 238000007906 compression Methods 0.000 description 7
- 238000005338 heat storage Methods 0.000 description 7
- 238000004146 energy storage Methods 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 3
- 238000005485 electric heating Methods 0.000 description 2
- 230000005611 electricity Effects 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 239000011232 storage material Substances 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H7/00—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release
- F24H7/02—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid
- F24H7/04—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid
- F24H7/0408—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply
- F24H7/0433—Storage heaters, i.e. heaters in which the energy is stored as heat in masses for subsequent release the released heat being conveyed to a transfer fluid with forced circulation of the transfer fluid using electrical energy supply the transfer medium being water
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D20/00—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00
- F28D20/0034—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material
- F28D2020/0047—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using liquid heat storage material using molten salts or liquid metals
-
- 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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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
Description
技术领域technical field
本发明涉及熔盐储能领域，尤其涉及一种压缩气体与熔盐泵耦合驱动的多罐熔盐蓄热系统。The invention relates to the field of molten salt energy storage, in particular to a multi-tank molten salt thermal storage system driven by a coupling of compressed gas and a molten salt pump.
背景技术Background technique
当前我国太阳能光伏发电、风能等新能源存在间歇性和波动性的问题，熔盐作为储能材料具有储能密度高、无毒无害、廉价易得、对环境友好、安全等优点能够很好的解决上述问题。利用熔盐蓄热技术，将低谷电或弃风弃光的“垃圾电”对熔盐进行加热从而为建筑物供热供暖或为工业提供蒸汽，不仅可以大幅削减电网峰谷差，增强电网的输电能力，而且可以提高可再生能源的利用效率，缓解采暖季的雾霾问题。At present, new energy sources such as solar photovoltaic power generation and wind energy in my country have problems of intermittency and volatility. As an energy storage material, molten salt has the advantages of high energy storage density, non-toxic and harmless, cheap and easy to obtain, environmentally friendly and safe. to solve the above problem. Using molten salt heat storage technology to heat molten salt with low-valley electricity or "garbage electricity" that is abandoned by wind and light to provide heating and heating for buildings or steam for industries, it can not only greatly reduce the peak-to-valley difference in the power grid, but also enhance the power grid. It can improve the utilization efficiency of renewable energy and alleviate the smog problem in the heating season.
目前熔盐储能系统主要为双罐系统，包括一个冷盐罐和一个热盐罐。冷盐罐中低温熔盐被泵输送到加热器升温后进入热盐罐储存再被输送到换热设备，随着储能需求的增加，熔盐罐体积增大，加工制造难度增加，同时设备危险性增大，容易造成熔盐外泄，不利于系统的安全稳定运行，同时任何一个储盐罐发生故障，系统需要全部停止运行，对企业影响和损失较大。At present, the molten salt energy storage system is mainly a two-tank system, including a cold salt tank and a hot salt tank. The low-temperature molten salt in the cold salt tank is pumped to the heater to heat up, then stored in the hot salt tank and then transported to the heat exchange equipment. The danger increases, and it is easy to cause molten salt leakage, which is not conducive to the safe and stable operation of the system. At the same time, if any salt storage tank fails, the system needs to stop running, which has a great impact and loss on the enterprise.
发明内容SUMMARY OF THE INVENTION
本发明提供了一种解决上述问题或者部分地解决上述问题的压缩气体与熔盐泵耦合驱动的多罐熔盐蓄热系统。The present invention provides a multi-tank molten salt heat storage system driven by coupling of compressed gas and molten salt pump to solve the above problems or partially solve the above problems.
本发明的技术方案为：The technical scheme of the present invention is:
一种压缩气体与熔盐泵耦合驱动的多罐熔盐蓄热系统，包括高温熔盐罐、低温熔盐罐、储盐罐、熔盐管道、高温熔盐泵、低温熔盐泵、低温熔盐阀、高温熔盐阀、气体压缩装置、气体阀、吸热器、换热器。A multi-tank molten salt heat storage system driven by compressed gas and molten salt pump coupling, including high temperature molten salt tank, low temperature molten salt tank, salt storage tank, molten salt pipeline, high temperature molten salt pump, low temperature molten salt pump, low temperature molten salt tank Salt valve, high temperature molten salt valve, gas compression device, gas valve, heat absorber, heat exchanger.
所述高温熔盐罐、低温熔盐罐和储盐罐的形状为立体筒状或圆筒形卧式。The shapes of the high temperature molten salt tank, the low temperature molten salt tank and the salt storage tank are three-dimensional cylindrical or horizontal cylindrical.
所述储盐罐为并联排列方式，数量不少于2个。The salt storage tanks are arranged in parallel, and the number is not less than 2.
所述低温熔盐泵、高温熔盐泵、低温熔盐阀、高温熔盐阀安装位置均在储盐罐、高温熔盐罐、低温熔盐罐的上方。The installation positions of the low temperature molten salt pump, the high temperature molten salt pump, the low temperature molten salt valve and the high temperature molten salt valve are all above the salt storage tank, the high temperature molten salt tank and the low temperature molten salt tank.
所述吸热器为塔式光热系统的中央吸热器，槽式光热系统的集热器，线性菲涅尔光热系统的集热器，电加热装置。The heat absorber is a central heat absorber of a tower type CSP system, a heat collector of a trough type CSP system, a heat collector of a linear Fresnel CSP system, and an electric heating device.
换热器吸热介质是水或导热油。The heat-absorbing medium of the heat exchanger is water or heat transfer oil.
压缩气体装置中气体是空气或氮气。The gas in the compressed gas device is air or nitrogen.
本发明采用压缩气体与熔盐泵耦合驱动的多罐熔盐蓄热系统，储盐罐采用并联排列方式，减小单个熔盐罐体积，提高了熔盐罐容积利用率，降低加工制造难度，避免在熔盐罐底部开孔，降低了熔盐泄露风险，任何一个单一储盐罐发生故障，系统均可以正常稳定运行，同时减少了系统中熔盐泵的使用数量，降低了系统运行成本，增加了系统运行的安全可靠性。The invention adopts a multi-tank molten salt heat storage system driven by compressed gas and a molten salt pump, and the salt storage tanks are arranged in parallel, which reduces the volume of a single molten salt tank, improves the volume utilization rate of the molten salt tank, and reduces the difficulty of processing and manufacturing. Avoid opening holes at the bottom of the molten salt tank, reducing the risk of molten salt leakage. If any single salt storage tank fails, the system can operate normally and stably, while reducing the number of molten salt pumps used in the system and reducing system operating costs. Increase the safety and reliability of system operation.
附图说明Description of drawings
为了更清楚地说明本发明或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。In order to explain the present invention or the technical solutions in the prior art more clearly, the following briefly introduces the accompanying drawings that need to be used in the description of the embodiments or the prior art. Obviously, the drawings in the following description are of the present invention. For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.
图1为本发明一种压缩气体与熔盐泵耦合驱动的多罐熔盐蓄热系统。FIG. 1 is a multi-tank molten salt heat storage system driven by a compressed gas coupled with a molten salt pump according to the present invention.
其中，1-低温熔盐罐，2-低温熔盐泵，3-吸热器，4-高温熔盐罐，5-第一低温熔盐阀，6-第一储盐罐，7-第一高温熔盐泵，8-第二低温熔盐阀，9-第二高温熔盐阀，10-第三低温熔盐阀，11-第三高温熔盐阀，12-气体压缩装置，13-第一气体阀，14-第二储盐罐，15-二气体阀，16-第四高温熔盐阀，17-第四低温熔盐阀，18-第五低温熔盐阀，19-换热器，20-第五高温熔盐阀。Among them, 1-low temperature molten salt tank, 2-low temperature molten salt pump, 3-heat absorber, 4-high temperature molten salt tank, 5-first low temperature molten salt valve, 6-first salt storage tank, 7-first High-temperature molten salt pump, 8-second low-temperature molten salt valve, 9-second high-temperature molten salt valve, 10-third low-temperature molten salt valve, 11-third high-temperature molten salt valve, 12-gas compression device, 13-th A gas valve, 14- the second salt storage tank, 15- the second gas valve, 16- the fourth high temperature molten salt valve, 17- the fourth low temperature molten salt valve, 18- the fifth low temperature molten salt valve, 19- heat exchanger , 20-5th high temperature molten salt valve.
具体实施方式Detailed ways
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚地描述，显热，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。In order to make the purposes, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly described below with reference to the accompanying drawings in the embodiments of the present invention. For sensible heat, the described embodiments are Some, but not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.
实施例1Example 1
图1为本发明实施例提供的一种压缩气体与熔盐泵耦合驱动的多罐熔盐蓄热系统结构示意图，如图1所示，包括低温熔盐罐1，低温熔盐泵2，吸热器3，高温熔盐罐4，第一低温熔盐阀5，第一储盐罐6，第一高温熔盐泵7，第二低温熔盐阀8，第二高温熔盐阀9，第三低温熔盐阀10，第三高温熔盐阀11，气体压缩装置12，第一气体阀13，第二储盐罐14，第二气体阀15，第四高温熔盐阀16，第四低温熔盐阀17，第五低温熔盐阀18，换热器19和第五高温熔盐阀20。FIG. 1 is a schematic structural diagram of a multi-tank molten salt heat storage system coupled with a compressed gas and a molten salt pump according to an embodiment of the present invention. As shown in FIG. 1 , it includes a low-temperature molten salt tank 1, a low-temperature molten salt pump 2, a Heater 3, high temperature molten salt tank 4, first low temperature molten salt valve 5, first salt storage tank 6, first high temperature molten salt pump 7, second low temperature molten salt valve 8, second high temperature molten salt valve 9, Three low temperature molten salt valve 10, third high temperature molten salt valve 11, gas compression device 12, first gas valve 13, second salt storage tank 14, second gas valve 15, fourth high temperature molten salt valve 16, fourth low temperature molten salt valve Molten salt valve 17 , fifth low temperature molten salt valve 18 , heat exchanger 19 and fifth high temperature molten salt valve 20 .
低温熔盐罐1通过低温熔盐泵2与吸热器3连接，第一储盐罐6、第二储盐罐14与吸热器3并列连接，吸热器3与第一储盐罐6之间设有第二高温熔盐阀9，吸热器3与第二储盐罐14之间设有第四高温熔盐阀16；第一储盐罐6通过第三高温熔盐阀11与高温熔盐罐4连接；第二储盐罐14通过第五高温熔盐阀20与高温熔盐罐4连接；第一储盐罐6通过两条并联的支路与低温熔盐罐1连接，第一条支路中，第一储盐罐6通过第三低温熔盐阀10与低温熔盐罐1连接，第二条支路中，第一储盐罐6通过第二低温熔盐阀8和第一低温熔盐阀5与低温熔盐罐1连接；第二储盐罐14通过两条并联的支路与低温熔盐罐1连接，第一条支路中，第二储盐罐14通过第四低温熔盐阀17与低温熔盐罐1连接，第二条支路中，第二储盐罐14通过第五低温熔盐阀18和第一低温熔盐阀5与低温熔盐罐1连接；高温熔盐罐4与低温熔盐罐1之间通过第一高温熔盐泵7、换热器19及第一低温熔盐阀5连接；第二低温熔盐阀8和第五低温熔盐阀18与第一低温熔盐阀5并联连接；第一储盐罐6和第二储盐罐14之间通过第一气体阀13、气体压缩装置12和第二气体阀15连接。The low temperature molten salt tank 1 is connected with the heat absorber 3 through the low temperature molten salt pump 2, the first salt storage tank 6 and the second salt storage tank 14 are connected in parallel with the heat absorber 3, and the heat absorber 3 is connected with the first salt storage tank 6 There is a second high-temperature molten salt valve 9 therebetween, and a fourth high-temperature molten salt valve 16 is provided between the heat absorber 3 and the second salt storage tank 14; The high temperature molten salt tank 4 is connected; the second salt storage tank 14 is connected with the high temperature molten salt tank 4 through the fifth high temperature molten salt valve 20; the first salt storage tank 6 is connected with the low temperature molten salt tank 1 through two parallel branches, In the first branch, the first salt storage tank 6 is connected to the low-temperature molten salt tank 1 through the third low-temperature molten salt valve 10 , and in the second branch, the first salt storage tank 6 passes through the second low-temperature molten salt valve 8 And the first low temperature molten salt valve 5 is connected with the low temperature molten salt tank 1; the second salt storage tank 14 is connected with the low temperature molten salt tank 1 through two parallel branches, and in the first branch, the second salt storage tank 14 The fourth low temperature molten salt valve 17 is connected to the low temperature molten salt tank 1. In the second branch, the second salt storage tank 14 is connected to the low temperature molten salt tank through the fifth low temperature molten salt valve 18 and the first low temperature molten salt valve 5. 1 connection; the high temperature molten salt tank 4 and the low temperature molten salt tank 1 are connected by the first high temperature molten salt pump 7, the heat exchanger 19 and the first low temperature molten salt valve 5; the second low temperature molten salt valve 8 and the fifth low temperature molten salt valve The molten salt valve 18 is connected in parallel with the first low-temperature molten salt valve 5;
系统蓄热过程，第一储盐罐6和储盐罐14中充满低温熔盐，首先打开第一气体阀13，第三低温熔盐阀10，关闭其余所有阀门，通过气体压缩装置12将第一储盐罐6中低温熔盐输送到低温熔盐罐1，然后通过低温熔盐泵2将低温熔盐罐1中的低温熔盐抽入到吸热器3中，关闭第四高温熔盐阀16，打开第二高温熔盐阀9，从吸热器3中流出的高温熔盐流进第一储盐罐6中，同时打开第一气体阀13，第三高温熔盐阀11通过气体压缩装置12将高温熔盐压入到高温熔盐罐4中，然后通过第一高温熔盐泵7进入换热器19进行换热，同时关闭第五低温熔盐阀18，第二低温熔盐阀8，打开第一低温熔盐阀5，使流出换热器19的低温熔盐流入低温熔盐罐1中，低温熔盐泵2的流量大于第一高温熔盐泵7的流量，因此直至第一储盐罐6中充满高温熔盐，依照此流程使第二储盐罐14中充满高温熔盐。During the thermal storage process of the system, the first salt storage tank 6 and the salt storage tank 14 are filled with low-temperature molten salt, firstly open the first gas valve 13 and the third low-temperature molten salt valve 10, close all other valves, and pass the gas compression device 12. The low-temperature molten salt in a salt storage tank 6 is transported to the low-temperature molten salt tank 1, and then the low-temperature molten salt in the low-temperature molten salt tank 1 is pumped into the heat absorber 3 through the low-temperature molten salt pump 2, and the fourth high-temperature molten salt is closed. Valve 16, open the second high temperature molten salt valve 9, the high temperature molten salt flowing out from the heat absorber 3 flows into the first salt storage tank 6, at the same time open the first gas valve 13, the third high temperature molten salt valve 11 through the gas The compression device 12 presses the high temperature molten salt into the high temperature molten salt tank 4, and then enters the heat exchanger 19 through the first high temperature molten salt pump 7 for heat exchange, and at the same time closes the fifth low temperature molten salt valve 18, the second low temperature molten salt Valve 8, open the first low temperature molten salt valve 5, so that the low temperature molten salt flowing out of the heat exchanger 19 flows into the low temperature molten salt tank 1, the flow rate of the low temperature molten salt pump 2 is greater than the flow rate of the first high temperature molten salt pump 7, so until The first salt storage tank 6 is filled with high-temperature molten salt, and the second salt storage tank 14 is filled with high-temperature molten salt according to this process.
系统放热过程，第一储盐罐6和储盐罐14中充满高温熔盐，首先打开气体阀13和第三高温熔盐阀11，关闭第三低温熔盐阀10，第二低温熔盐阀8和第二高温熔盐阀9，通过气体压缩装置12将第一储盐罐6中的高温熔盐压入第二高温熔盐罐4中，然后通过第一高温熔盐泵7流入换热器19进行换热，同时关闭第五低温熔盐阀18，第二低温熔盐阀8，打开第一低温熔盐阀5，低温熔盐从第二换热器19流入到低温熔盐罐1中，直至第一储盐罐6中高温熔盐全部排出，此时低温熔盐罐1中充满低温熔盐。依此方法，通过气体压缩装置12将第二储盐罐14中的高温熔盐压入高温熔盐罐4中，然后通过第一高温熔盐泵7流入换热器19进行换热，同时关闭第五低温熔盐阀18，第一低温熔盐阀5，打开第二低温熔盐阀8，低温熔盐从第四换热器16流入第一储盐罐6中，直至第二储盐罐14中高温熔盐全部排出，此时第一储盐罐6中充满低温熔盐。During the exothermic process of the system, the first salt storage tank 6 and the salt storage tank 14 are filled with high-temperature molten salt, first open the gas valve 13 and the third high-temperature molten salt valve 11, close the third low-temperature molten salt valve 10, and the second low-temperature molten salt The valve 8 and the second high temperature molten salt valve 9 press the high temperature molten salt in the first salt storage tank 6 into the second high temperature molten salt tank 4 through the gas compression device 12, and then flow into the exchange through the first high temperature molten salt pump 7. Heater 19 performs heat exchange, while closing the fifth low temperature molten salt valve 18, the second low temperature molten salt valve 8, and opening the first low temperature molten salt valve 5, the low temperature molten salt flows from the second heat exchanger 19 into the low temperature molten salt tank 1, until all the high-temperature molten salt in the first salt storage tank 6 is discharged, at this time, the low-temperature molten salt tank 1 is filled with low-temperature molten salt. According to this method, the high-temperature molten salt in the second salt storage tank 14 is pressed into the high-temperature molten salt tank 4 through the gas compression device 12, and then flows into the heat exchanger 19 through the first high-temperature molten salt pump 7 for heat exchange, and is closed at the same time. The fifth low temperature molten salt valve 18, the first low temperature molten salt valve 5, open the second low temperature molten salt valve 8, the low temperature molten salt flows from the fourth heat exchanger 16 into the first salt storage tank 6, until the second salt storage tank 14 All the medium and high temperature molten salt is discharged, and at this time, the first salt storage tank 6 is filled with low temperature molten salt.
所述高温熔盐罐4、低温熔盐罐1、第一储盐罐6和第二储盐罐14的形状为立体筒状或圆筒形卧式。The shapes of the high temperature molten salt tank 4, the low temperature molten salt tank 1, the first salt storage tank 6 and the second salt storage tank 14 are three-dimensional cylindrical or horizontal cylindrical.
所述第一储盐罐6和第二储盐罐14为并联排列方式，系统中第一储盐罐6和第二储盐罐14的总数量不少于2个。The first salt storage tanks 6 and the second salt storage tanks 14 are arranged in parallel, and the total number of the first salt storage tanks 6 and the second salt storage tanks 14 in the system is not less than two.
低温熔盐泵、高温熔盐泵、低温熔盐阀和高温熔盐阀安装位置均在储盐罐、高温熔盐罐、低温熔盐罐的上方。The low temperature molten salt pump, high temperature molten salt pump, low temperature molten salt valve and high temperature molten salt valve are installed above the salt storage tank, high temperature molten salt tank and low temperature molten salt tank.
所述吸热器3为塔式光热系统的中央吸热器，槽式光热系统的集热器，线性菲涅尔光热系统的集热器或电加热装置。The heat absorber 3 is a central heat absorber of a tower type CSP system, a heat collector of a trough type CSP system, a heat collector of a linear Fresnel CSP system or an electric heating device.
换热器19的吸热介质是水或导热油。The heat absorption medium of the heat exchanger 19 is water or heat transfer oil.
压缩气体装置中气体是空气或氮气。The gas in the compressed gas device is air or nitrogen.
实施例2Example 2
与实施例1中的结构相类似，本系统并联设有第三储盐罐，第三储盐罐与第一储盐罐6和第二储盐罐14为并联布设，按照熔盐储能系统的工作需要，满足系统的工作要求；此外，当任何一个储盐罐发生故障时候，此系统均可以正常稳定运行，保证整个安全可靠性。Similar to the structure in Embodiment 1, the system is provided with a third salt storage tank in parallel, and the third salt storage tank is arranged in parallel with the first salt storage tank 6 and the second salt storage tank 14. According to the molten salt energy storage system In addition, when any salt storage tank fails, the system can operate normally and stably to ensure the safety and reliability of the whole.
本发明实施例提供的一种压缩气体与熔盐泵耦合驱动的多罐熔盐蓄热系统，通过并联排列多个储盐罐，减小了单个储盐罐的体积，提高了熔盐罐容积利用率，降低加工制造难度，避免在熔盐罐底部开孔，降低了熔盐泄露风险，任何一个单一储盐罐发生故障，系统均可以正常稳定运行，同时减少了系统中熔盐泵的使用数量，降低了系统运行成本，增加了系统运行的安全可靠性。The embodiment of the present invention provides a multi-tank molten salt heat storage system driven by a compressed gas coupled with a molten salt pump. By arranging multiple salt storage tanks in parallel, the volume of a single salt storage tank is reduced and the volume of the molten salt tank is increased. The utilization rate reduces the difficulty of processing and manufacturing, avoids opening holes at the bottom of the molten salt tank, and reduces the risk of molten salt leakage. If any single salt storage tank fails, the system can operate normally and stably, while reducing the use of molten salt pumps in the system. Quantity, reduces the cost of system operation, and increases the safety and reliability of system operation.
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明个实施例技术方案的精神和范围。Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but not to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that it can still be The technical solutions described in the foregoing embodiments are modified, or some technical features thereof are equivalently replaced; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.
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