WO2022267155A1 - Solar photo-thermal power station salt melting system based on heat transfer oil heat collection field - Google Patents
Solar photo-thermal power station salt melting system based on heat transfer oil heat collection field Download PDFInfo
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- WO2022267155A1 WO2022267155A1 PCT/CN2021/108092 CN2021108092W WO2022267155A1 WO 2022267155 A1 WO2022267155 A1 WO 2022267155A1 CN 2021108092 W CN2021108092 W CN 2021108092W WO 2022267155 A1 WO2022267155 A1 WO 2022267155A1
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- WIPO (PCT)
- Prior art keywords
- salt
- heat
- molten salt
- heat exchanger
- collection field
- Prior art date
Links
- 150000003839 salts Chemical class 0.000 title claims abstract description 311
- 238000002844 melting Methods 0.000 title claims abstract description 56
- 230000008018 melting Effects 0.000 title claims abstract description 56
- 239000000126 substance Substances 0.000 claims description 15
- 230000005611 electricity Effects 0.000 claims description 7
- -1 salt salt Chemical class 0.000 claims 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical class C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 42
- 239000007788 liquid Substances 0.000 description 32
- 238000006243 chemical reaction Methods 0.000 description 20
- 238000000034 method Methods 0.000 description 20
- 239000007787 solid Substances 0.000 description 20
- 239000003345 natural gas Substances 0.000 description 14
- 238000010248 power generation Methods 0.000 description 11
- FGIUAXJPYTZDNR-UHFFFAOYSA-N potassium nitrate Chemical compound [K+].[O-][N+]([O-])=O FGIUAXJPYTZDNR-UHFFFAOYSA-N 0.000 description 8
- VWDWKYIASSYTQR-UHFFFAOYSA-N sodium nitrate Chemical compound [Na+].[O-][N+]([O-])=O VWDWKYIASSYTQR-UHFFFAOYSA-N 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 7
- 230000008569 process Effects 0.000 description 7
- 239000000243 solution Substances 0.000 description 7
- UGFAIRIUMAVXCW-UHFFFAOYSA-N Carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 6
- 239000003546 flue gas Substances 0.000 description 6
- 238000005338 heat storage Methods 0.000 description 6
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 4
- 238000002485 combustion reaction Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 238000004146 energy storage Methods 0.000 description 4
- 239000002803 fossil fuel Substances 0.000 description 4
- 239000004323 potassium nitrate Substances 0.000 description 4
- 235000010333 potassium nitrate Nutrition 0.000 description 4
- 239000004317 sodium nitrate Substances 0.000 description 4
- 235000010344 sodium nitrate Nutrition 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 2
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 238000010276 construction Methods 0.000 description 2
- 238000010612 desalination reaction Methods 0.000 description 2
- 238000011033 desalting Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000007667 floating Methods 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000032258 transport Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001311 chemical methods and process Methods 0.000 description 1
- 230000003749 cleanliness Effects 0.000 description 1
- 238000005485 electric heating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 238000010309 melting process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000012266 salt solution Substances 0.000 description 1
- 238000009938 salting Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 230000009466 transformation Effects 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/005—Fusing
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S10/00—Solar heat collectors using working fluids
- F24S10/30—Solar heat collectors using working fluids with means for exchanging heat between two or more working fluids
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/20—Solar heat collectors for receiving concentrated solar energy, e.g. receivers for solar power plants
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S20/00—Solar heat collectors specially adapted for particular uses or environments
- F24S20/40—Solar heat collectors combined with other heat sources, e.g. using electrical heating or heat from ambient air
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S60/00—Arrangements for storing heat collected by solar heat collectors
- F24S60/30—Arrangements for storing heat collected by solar heat collectors storing heat in liquids
-
- 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
-
- 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
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/44—Heat exchange systems
Definitions
- the invention relates to a molten salt melting salt system of a solar photothermal power station, which belongs to the technical field of salt melting systems.
- the molten salt Before the molten salt is put into the solar thermal power station, it is mainly supplied in solid form, which is convenient for the transportation and storage of molten salt. When the molten salt needs to be put into the solar thermal power station, it is necessary to convert a large amount of solid molten salt into liquid molten salt. A key procedure before commissioning and operation, the molten salt changes from solid to liquid through this process. The high-temperature molten salt enters the system and starts to circulate, and remains liquid throughout the life of the power station.
- the molten salt is transported to the molten salt tank through another molten salt delivery pump;
- the second is that sodium nitrate and potassium nitrate are pulverized and mixed in proportion, and then directly enter the natural gasification salt furnace.
- a heat exchange coil is installed in the furnace, and the pipe contains high-temperature flue gas. Its flow direction is opposite to that of the liquid in the furnace.
- the molten salt overflows into the buffer tank through the overflow pipe, and then pumps from the buffer tank into the molten salt tank.
- Both of the above two traditional salt melting methods use the flue gas after natural gas combustion as the heat source for heating solid molten salt particles, and a large amount of natural gas is consumed in the salt melting process. Due to the technical limitations of the natural gas furnace itself and for safety considerations, the salt melting speed is about 30 ⁇ 40 t/h. After the desalination is completed, the supporting desalination equipment has no use value in this project and can only be used for the next project to desalt again or put aside for waste.
- the cost of the built-up salt melting furnace system using natural gas heating to realize salt melting is relatively high, and after the first salt melting is realized, the molten salt is put into the solar thermal system for use, and there is no need to melt salt again, so The supporting natural gas salt furnace system equipment cannot be used reasonably;
- the heating capacity of the natural gas salt furnace system is limited. In the molten salt project of a large-scale solar thermal power station with tens of thousands of tons, the salt melting speed is relatively slow and the salt melting cycle is long.
- the present invention aims at shortening the period of desalting and reducing the cost of desalting.
- a brief overview of the invention is given below in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical parts of the invention nor to delineate the scope of the invention.
- a salt melting system of solar photothermal power station based on heat transfer oil heat collection field including a salt melting furnace, a heat exchanger and a molten salt storage tank, the heat exchanger has a molten salt inlet, a molten salt outlet, a heat source outlet, and a heat source inlet , the salt furnace communicates with the molten salt inlet of the heat exchanger through the molten salt pipeline, the salt furnace communicates with the molten salt storage tank through the delivery pump, and the molten salt outlet of the heat exchanger communicates with the salt furnace through the first pipeline, so
- the heat source outlet and heat source inlet of the heat exchanger are connected to the heat transfer oil solar heat collection field, and the heat transfer oil solar heat collection field is used to provide the heat exchange heat source for the heat exchanger.
- an auxiliary electric heater is also included, the inlet of the auxiliary electric heater communicates with the molten salt pipeline, and the outlet of the auxiliary electric heater communicates with the salt furnace through the second pipeline.
- valves and temperature measuring instruments are respectively installed on the first pipeline and the second pipeline.
- the electric energy used in the auxiliary electric heater comes from abandoned wind power, abandoned photovoltaic power or low valley power.
- valves and temperature measuring instruments are installed on the secondary molten salt pipeline.
- the heat exchanger is a shell-and-tube heat exchanger, a shell-and-tube heat exchanger or a plate heat exchanger.
- the salt melting system of the present invention solves the problem that the solid molten salt of conventional photothermal power plants is converted into salt through the natural gas salt furnace system, while the conventional natural gas salt furnace realizes the salt conversion process, the heating capacity of the furnace, the amount of natural gas and other factors Due to restrictions, the entire cycle of salt melting cannot be guaranteed, and the cost of salt melting remains high.
- the present invention utilizes the photothermal power generation system to carry out the salt conversion work, so that both power generation and salt conversion are correct, and the salt conversion capacity is much greater than that of the salt furnace system;
- salt when there is sun in the daytime, salt is converted by light and heat, and when there is no sun at night, electric heating is used to absorb abandoned electricity or low-peak electricity to convert salt, which effectively shortens the cycle of salt conversion.
- the present invention realizes salt melting through photothermal method, and its speed of salt melting is significantly improved, and the system has simple structure, easy operation, high safety, energy saving and environmental protection.
- the present invention is affected by the equipment environment, the equipment itself, and the plant environment, and the cleanliness of the salt is low, while the salt conversion is performed by the light-heat heat exchange method, which is clean and efficient.
- the sodium nitrate and potassium nitrate are crushed and transported to the salt furnace in proportion.
- the low-temperature liquid in the salt furnace is melted
- the salt is pumped into the oil-salt heat exchanger, and the low-temperature molten salt in the oil-salt heat exchanger is heated to a high temperature state by the high-temperature heat-conducting oil that absorbs solar energy through the solar heat collection field, and then transported back to the salt furnace.
- the salt After the salt is mixed, it forms a low-temperature liquid molten salt above 270°C, which is transported and stored in a molten salt storage tank.
- the salt melting speed of the photothermal salt system exceeds 210 t/h, which is 5-7 times faster than the traditional salt melting speed.
- Photothermal salt uses solar energy as the heat source for salt melting, without any fossil fuels, and is clean and environmentally friendly. Due to the use of the original heat exchange equipment of the photothermal power station, the construction cost is saved. After the salt is completed, the supporting feeding system can be disassembled and recycled for reuse, and the salt furnace and electric heater can be directly converted into a high-temperature energy storage system, which is used to absorb abandoned wind and light, and realize energy storage.
- the salt melting speed exceeds 210 tons per hour, which is five times faster than the traditional salt melting speed, and can exceed 4,000 tons per day, which is more than four times the previous single-day salt melting world record. It only takes two and a half weeks to melt 70,000 tons of salt, which is two months faster than the traditional way of salt melting.
- the energy storage system can generate electricity in advance, saving tens of millions of fossil fuels for salt melting, and saving 20% in equipment investment compared with traditional salt melting systems. .
- Figure 1 is a schematic diagram of a salt chemical system based on a heat transfer oil solar heat collection field
- Fig. 2 is the composition diagram of the chemical salt system in the second specific embodiment
- Fig. 3 is the configuration diagram of the salt-dissolving system of the heat exchanger in the second specific embodiment
- Fig. 4 is a schematic diagram of the relationship between the amount of salt and the cycle of salt in the traditional way of salt and in the way of salt in the present invention
- this embodiment provides a salt chemical system of a solar thermal power station based on a thermal oil heat collection field, including a salt furnace 1, a heat exchanger 2 and a molten salt storage tank 3, and the heat exchanger 2 It has a molten salt inlet 21, a molten salt outlet 22, a heat source outlet 23 and a heat source inlet 24.
- the salt furnace 1 is connected to the molten salt inlet 21 of the heat exchanger 2 through a molten salt pipeline 4, and the salt furnace 1 is connected to the heat exchanger 2 through a delivery pump 5.
- the molten salt storage tank 3 is connected, and the molten salt outlet 22 of the heat exchanger 2 is connected with the salt furnace 1 through the first pipeline 11, and the heat source outlet 23 and the heat source inlet 24 of the heat exchanger 2 are connected with the heat transfer oil solar heat collection field 6
- the connection relationship is established, and the heat transfer oil solar heat collection field 6 is used to provide the heat exchange heat source for the heat exchanger 2 .
- the chemical salt furnace 1 after the solid salt and the high-temperature molten salt are mixed in the chemical salt furnace 1, a medium-temperature liquid molten salt is formed, and a part of the medium-temperature liquid molten salt is sent to the molten salt storage tank 3 through the delivery pump 5 for storage.
- the other part is driven into the heat exchanger 2 through the circulation pump, and the medium-temperature molten salt is heated to the high-temperature molten salt by the heat exchanger 2, and then the high-temperature molten salt is transported to the salt furnace 1 through the circulation pump, and is used again for the salt work, thus forming a cycle of salt work;
- the heat exchanger 2 is a heat-conducting oil heat exchanger.
- solid salt and 300-400 degree high temperature molten salt are mixed in the salt furnace 1 to form a 280-340 degree medium temperature Liquid molten salt
- the formed medium-temperature liquid molten salt is sent to the molten salt storage tank 3 through the delivery pump 5 for storage, and the other part is pumped into the heat exchanger 2 from the molten salt inlet 21 through the circulation pump.
- the heat collecting field 6 communicates with the heat source outlet 23 and the heat source inlet 24 of the heat exchanger 2, and transports the high-temperature heat transfer oil absorbing heat in the heat transfer oil solar heat collecting field 6 to the heat exchanger 2, and inside the heat exchanger 2, Use high-temperature heat conduction oil to exchange heat to the medium-temperature molten salt entering the heat exchanger 2, so that the temperature of the medium-temperature molten salt (280-340°C) reaches the temperature of the high-temperature molten salt (300-400°C), and then, the high-temperature molten salt It is transported into the salt furnace 1 through the first pipeline 11, and is used to complete the work of salt again. The amount of transportation ensures that the solid molten salt newly added to the salt furnace 1 can reach a certain temperature, and the solid molten salt is melted, and the process is repeated.
- the above-mentioned steps realize the work of circulating salt.
- the salt melting system in this embodiment solves the problem that the solid molten salt of conventional photothermal power plants is converted into salt through the natural gas salt furnace system, while the conventional natural gas salt furnace realizes the salt conversion process, the heating capacity of the furnace, the amount of natural gas and other factors Due to the limitation, the whole cycle of salt melting is long, and the construction and operation costs of salt melting are relatively high.
- the system utilizes the power generation and heat storage system of the photothermal power station to carry out the salt melting work, so that both power generation and salt melting are correct, and the salt melting capacity is much greater than that of the traditional natural gas salt melting furnace system;
- high-temperature heat transfer oil is used to exchange heat to the medium-temperature molten salt entering the heat exchanger 2, so that the temperature of the medium-temperature molten salt reaches the high-temperature molten salt.
- the heat-conducting oil comes from the heat-conducting oil solar heat collection field 6, and the heat-conducting oil in the heat exchanger 2 is heated by means of a solar mirror field.
- the heat transfer oil in the heat exchanger 2 is derived from the solar mirror field, and a trough solar collector is used specifically.
- the trough solar collector is used to heat the heat transfer oil in the pipeline, and the solar energy is converted into heat energy.
- Thermal energy is used for salt conversion, which reduces the amount of natural gas used in molten salt projects in large-scale photothermal power plants and reduces the cost of salt conversion. At the same time, solar energy is fully utilized to improve environmental benefits.
- the salt furnace 1 is used to convert the pulverized solid molten salt into liquid molten salt, and the salt furnace 1 is a container for realizing the salt;
- the heat exchanger 2 is a shell-and-tube heat exchanger , shell and tube heat exchanger or plate heat exchanger.
- an auxiliary electric heater 10 is also included, the inlet of the auxiliary electric heater 10 communicates with the molten salt pipeline 4, and the outlet of the auxiliary electric heater 10 passes through the second pipeline 12 Connected with the salt furnace 1;
- a part of the medium-temperature molten salt in the chemical salt furnace 1 flows into the heat exchanger 2 and/or the auxiliary electric heater 10, and the medium-temperature molten salt is heated to high temperature melting by the heat exchanger 2 and/or the auxiliary electric heater 10 salt, and then the high-temperature molten salt is transported to the salt furnace 1 through a circulating pump to realize the circulation of salt;
- auxiliary electric heaters 10 The number of auxiliary electric heaters 10 is multiple, and multiple auxiliary electric heaters 10 are arranged in the whole chemical salt system in parallel or in series;
- the salt chemical speed exceeds 210 tons per hour, which is five times faster than the traditional salt chemical process, and can exceed 4,000 tons per day, which is four times the previous single-day salt chemical world record
- a half weeks to melt 70,000 tons of salt continuously, which is two months faster than the traditional way of salt melting
- it can realize heat storage island power generation in advance save tens of millions of fossil fuels for salt melting, and the investment in equipment is also higher than that of traditional salt melting
- the system saves 20%, the specific comparison is shown in the figure:
- the current international conventional salt system uses natural gas salt furnace, which uses the flue gas after natural gas combustion to provide heat to melt solid molten salt into a liquid state.
- the conventional way is to buy a natural gas salt furnace, and then use the flue gas after natural gas combustion to provide heat to melt the solid molten salt into a liquid state;
- the original equipment of the solar power plant is used to carry out the salt melting operation.
- the existing equipment in the factory, the original function of this equipment is to use solar power to generate electricity, in this embodiment, according to the coordination and connection mode of each technical feature in this embodiment, form a salt system, and use this system for Realize salt conversion, which saves the cost of purchasing and building natural gas salt conversion furnaces, reduces carbon dioxide emissions in the salt conversion process, and uses existing equipment to achieve salt conversion speed and salt conversion cycle (as shown in Figure 4 Show);
- the heat storage medium used in the solar-thermal power station project is high-temperature molten salt.
- the power station is equipped with a high-temperature molten salt heat storage system.
- the high-temperature molten salt used in the system is a mixture of 40% potassium nitrate and 60% sodium nitrate by mass fraction.
- the solid molten salt must be melted and injected into the cold salt tank. This step (saltification) plays a vital role in the smooth commissioning and official commissioning of the heat storage system.
- the conventional salt melting systems in the world all use natural gas salt melting furnaces, which use the flue gas after natural gas combustion to provide heat to melt the solid molten salt into a liquid state.
- This conventional salt conversion system not only has a low rate of salt conversion and cannot put the heat storage system into normal operation in a short period of time, but also consumes a large amount of fossil fuels, which is contrary to the "double carbon" commitment.
- limited by the high melting temperature of molten salt and many technical difficulties in the salt melting system practical exploration of high-speed, low-carbon new salt melting technology at home and abroad is almost zero.
- the use of the salt chemical system of this embodiment can ensure both solar thermal power generation and salt chemical conversion, and it is of great significance to realize salt chemical conversion in a solar thermal power generation project.
- valve 8 and temperature measuring instrument 9 are respectively installed on described first pipeline 11 and second pipeline 12, valve 8 uses To control the switch of the pipeline, the temperature measuring instrument 8 is used to measure the temperature of the fluid in the pipeline. The opening and closing of the molten salt in the first pipeline 11 and the second pipeline 12 is monitored in real time by using the information interaction between the valve 8 and the temperature measuring instrument 9, so as to ensure the smooth progress of the salt melting work.
- the electric energy used in the auxiliary electric heater 10 comes from low-cost electricity such as abandoned wind power, abandoned photovoltaic power, and low-peak electricity.
- the cost of this electric energy is lower than the cost of electric energy provided by conventional power stations.
- this embodiment provides a solar thermal power station salt system based on a heat-conducting oil heat collection field.
- the difference from Embodiment 1 is that there are multiple heat exchangers 2, and multiple heat exchangers Device 2 is installed in parallel. Multiple heat exchangers 2 arranged in parallel can realize simultaneous heating of medium-temperature liquid molten salt at 280-340 degrees to reach high-temperature molten salt at 300-400 degrees.
- the work/work of any one of the heat exchangers 2 can also be individually controlled. It is closed without affecting the work of other heat exchangers 2.
- the method of connecting multiple heat exchangers 2 in parallel is flexible and easy to use. When an accident occurs in a single heat exchanger 2, it will not affect the operation of the entire salt chemical system The advantages.
- this embodiment provides a solar thermal power station salt system based on a heat-conducting oil heat collection field.
- the difference from Embodiment 1 is that the number of heat exchangers 2 is multiple, and multiple The heat exchanger 2 is installed in series.
- series heat exchanger 2 medium temperature liquid molten salt at 280-340 degrees can flow through one channel and undergo multiple heat exchanges to achieve high temperature molten salt at 300-400 degrees, and the whole system has only one channel in series, which is convenient for switching control the entire system.
- two adjacent heat exchangers 2 are communicated through a secondary molten salt pipeline 7 .
- a valve 8 for opening/closing the secondary molten salt pipeline 7 and a temperature measuring instrument 8 for measuring the temperature of liquid molten salt circulating in the secondary molten salt pipeline 7 are installed on the secondary molten salt pipeline 7 .
- the 280-340°C medium-temperature liquid molten salt flowing out of the salt furnace 1 enters the heat exchanger 2, and in the heat exchanger 2, the 280-340°C medium-temperature liquid molten salt is raised to a 300-400°C high-temperature molten salt; If the medium-temperature liquid molten salt in the heat exchanger 2 cannot effectively exchange heat to the high-temperature molten salt temperature state, the secondary molten salt pipeline 7 is opened to transport the liquid molten salt to another parallel heat exchanger 2 again , and further heat-exchange the liquid molten salt until it reaches a high temperature molten salt state of 300-400 degrees.
- the heat exchanger 2 is used to heat and convert medium-temperature liquid molten salt (280-340°C) into high-temperature liquid molten salt (300-400°C).
- the main principle is that the heat exchanger 2 has a molten salt inlet 21, a molten salt outlet 22, a heat source outlet 23 and a heat source inlet 24;
- the heat medium (such as heat conduction oil, hot molten salt) performs heat exchange, heats the medium-temperature liquid molten salt to form high-temperature liquid molten salt, and the high-temperature liquid molten salt is transported to the salt furnace 1 to melt the solid in the salt furnace 1 molten salt.
- the temperature of high-temperature molten salt can fluctuate up and down 370 degrees, with a floating range of 70 degrees (up to 600 degrees), and the temperature of medium-temperature salt can fluctuate up and down 310 degrees, with a floating range of 30 degrees.
- the heat exchanger 2 is a shell-and-tube heat exchanger, a tube-and-tube heat exchanger or a plate heat exchanger.
- orientation words such as “front, back, up, down, left, right", “horizontal, vertical, vertical, horizontal” and “top, bottom” etc. indicate the orientation Or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. In the absence of a contrary description, these orientation words do not indicate or imply the device or element referred to. It must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the protection scope of the present invention; the orientation words “inner and outer” refer to the inner and outer relative to the outline of each component itself.
- spatially relative terms may be used here, such as “on !, “over !, “on the surface of !, “above”, etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as “above” or “above” other devices or configurations would then be oriented “beneath” or “above” the other devices or configurations. under other devices or configurations”. Thus, the exemplary term “above” can encompass both an orientation of “above” and “beneath”. The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.
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Abstract
A solar photo-thermal power station salt melting system based on a heat transfer oil solar heat collection field, comprising: a salt melting furnace (1), a heat exchanger (2), and a molten salt storage tank (3). The salt melting furnace (1) is communicated with a low-temperature molten salt inlet (21) of the heat exchanger (2) by means of a molten salt pipeline (4), the salt melting furnace (1) is communicated with the molten salt storage tank (3) by means of a conveying pump (5), and a high-temperature molten salt outlet (22) of the heat exchanger (2) is communicated with the salt melting furnace (1); a connection relationship is established between the heat exchanger (2) and the heat transfer oil solar heat collection field (6), and the heat transfer oil solar heat collection field (6) is configured to provide a heat exchange heat source for the heat exchanger (2).
Description
本发明涉及一种太阳能光热电站熔盐化盐系统,属于化盐系统技术领域。The invention relates to a molten salt melting salt system of a solar photothermal power station, which belongs to the technical field of salt melting systems.
熔盐在投入太阳能光热电站前,主要以固体形式供货,采用固体形式供货方便熔盐的运输及存储。而当熔盐需要投入到太阳能光热电站时,需要将大量固态熔盐转化为液态熔融盐,其方式是将熔盐进行初熔,熔盐初熔是光热电站熔盐储热系统在进入调试运行之前的一道关键程序,熔盐通过此流程由固态变为液态高温熔盐进入系统开始循环,并在整个电站的寿命期内保持液态。Before the molten salt is put into the solar thermal power station, it is mainly supplied in solid form, which is convenient for the transportation and storage of molten salt. When the molten salt needs to be put into the solar thermal power station, it is necessary to convert a large amount of solid molten salt into liquid molten salt. A key procedure before commissioning and operation, the molten salt changes from solid to liquid through this process. The high-temperature molten salt enters the system and starts to circulate, and remains liquid throughout the life of the power station.
现有的光热太阳能光热电站中,实现化盐的方案大致有两种,其一是采用电加热器进行初始化盐后,利用熔盐循环泵将低温液态的熔盐泵入天然气化盐炉中,通过燃烧天然气产生的高温烟气将熔盐炉内盘管中的熔盐加热到高温状态之后输送回熔盐槽中。硝酸钠与硝酸钾(固态熔盐)按比例加入到熔盐槽中,当熔盐槽内熔盐的温度满足要求时,通过另一台熔盐输送泵将熔盐输送至熔盐罐中;其二是硝酸钠与硝酸钾按比例粉碎混合后直接进入天然气化盐炉中,炉膛内设置换热盘管,管内含有高温烟气,其流动方向与炉内液体搅拌方向相反,融化后的液体熔盐通过溢流管溢流到缓冲罐中,然后再从缓冲罐中泵入熔盐罐。以上两种传统化盐方式均使用天然气燃烧后的烟气作为加热固体熔盐颗粒的热源,化盐过程中需消耗大量的天然气。受天然气炉本身的技术限制以及出于安全性考虑,化盐速度约为30~40
t/h。化盐完成后,配套的化盐设备在本项目中已无利用价值,只能用于下一个项目进行再次化盐或者搁置浪费。In the existing photothermal solar photothermal power station, there are roughly two schemes to realize the salt transformation. One is to use the electric heater to initialize the salt, and then use the molten salt circulation pump to pump the low-temperature liquid molten salt into the natural gas salt furnace In the process, the molten salt in the coil in the molten salt furnace is heated to a high temperature state by the high-temperature flue gas generated by burning natural gas, and then transported back to the molten salt tank. Sodium nitrate and potassium nitrate (solid molten salt) are added to the molten salt tank in proportion. When the temperature of the molten salt in the molten salt tank meets the requirements, the molten salt is transported to the molten salt tank through another molten salt delivery pump; The second is that sodium nitrate and potassium nitrate are pulverized and mixed in proportion, and then directly enter the natural gasification salt furnace. A heat exchange coil is installed in the furnace, and the pipe contains high-temperature flue gas. Its flow direction is opposite to that of the liquid in the furnace. The molten salt overflows into the buffer tank through the overflow pipe, and then pumps from the buffer tank into the molten salt tank. Both of the above two traditional salt melting methods use the flue gas after natural gas combustion as the heat source for heating solid molten salt particles, and a large amount of natural gas is consumed in the salt melting process. Due to the technical limitations of the natural gas furnace itself and for safety considerations, the salt melting speed is about 30~40
t/h. After the desalination is completed, the supporting desalination equipment has no use value in this project and can only be used for the next project to desalt again or put aside for waste.
除上述陈述之外,常规的化盐方式还具有以下缺点:In addition to the above statements, the conventional way of salting also has the following disadvantages:
1. 建成的利用天然气加热方式实现化盐的化盐炉系统,其成本较高,且实现一次化盐后,该熔融盐投入到太阳能光热系统中使用,就不需要再次化盐了,因此配套的天然气化盐炉系统设备得不到合理使用;1. The cost of the built-up salt melting furnace system using natural gas heating to realize salt melting is relatively high, and after the first salt melting is realized, the molten salt is put into the solar thermal system for use, and there is no need to melt salt again, so The supporting natural gas salt furnace system equipment cannot be used reasonably;
2.使用天然气化盐炉系统实现化盐时,需要燃烧天然气,在几万吨的大型光热电站熔盐项目中,所耗费天然气成本较高;2. When using the natural gas salt furnace system to realize salt conversion, natural gas needs to be burned. In the molten salt project of a large-scale solar thermal power station with tens of thousands of tons, the cost of natural gas consumed is relatively high;
3.使用天然气化盐炉系统燃烧天然气排放的二氧化碳量较大,对环境具有一定的污染性;3. The use of natural gas salt furnace system to burn natural gas emits a large amount of carbon dioxide, which has certain pollution to the environment;
4.天然气化盐炉系统升温能力有限,在几万吨的大型光热电站熔盐项目中,其化盐速度较慢,化盐周期较长。4. The heating capacity of the natural gas salt furnace system is limited. In the molten salt project of a large-scale solar thermal power station with tens of thousands of tons, the salt melting speed is relatively slow and the salt melting cycle is long.
基于上述情况,开展化盐技术方案研究工作,对缩短化盐周期、降低化盐成本,提高化盐速度和质量,确保光热发电和化盐两不误具有十分重要的意义。Based on the above situation, it is of great significance to carry out the research on the technical solution of salt to shorten the cycle of salt, to reduce the cost of salt, to improve the speed and quality of salt, and to ensure the balance between solar thermal power generation and salt.
本发明为了缩短化盐周期、降低化盐成本。在下文中给出了关于本发明的简要概述,以便提供关于本发明的某些方面的基本理解。应当理解,这个概述并不是关于本发明的穷举性概述。它并不是意图确定本发明的关键或重要部分,也不是意图限定本发明的范围。The present invention aims at shortening the period of desalting and reducing the cost of desalting. A brief overview of the invention is given below in order to provide a basic understanding of some aspects of the invention. It should be understood that this summary is not an exhaustive overview of the invention. It is not intended to identify key or critical parts of the invention nor to delineate the scope of the invention.
一种基于导热油集热场的太阳能光热电站化盐系统,包括化盐炉、换热器和熔盐储罐,所述换热器具有熔盐入口、熔盐出口、热源出口和热源入口,所述化盐炉通过熔盐管道连通换热器的熔盐入口,化盐炉通过输送泵与熔盐储罐连通,换热器的熔盐出口通过第一管道与化盐炉连通,所述换热器的热源出口、热源入口与导热油太阳能集热场建立连接关系,导热油太阳能集热场用于给换热器提供换热热源。A salt melting system of solar photothermal power station based on heat transfer oil heat collection field, including a salt melting furnace, a heat exchanger and a molten salt storage tank, the heat exchanger has a molten salt inlet, a molten salt outlet, a heat source outlet, and a heat source inlet , the salt furnace communicates with the molten salt inlet of the heat exchanger through the molten salt pipeline, the salt furnace communicates with the molten salt storage tank through the delivery pump, and the molten salt outlet of the heat exchanger communicates with the salt furnace through the first pipeline, so The heat source outlet and heat source inlet of the heat exchanger are connected to the heat transfer oil solar heat collection field, and the heat transfer oil solar heat collection field is used to provide the heat exchange heat source for the heat exchanger.
进一步地:还包括辅助电加热器,辅助电加热器的入口与熔盐管道连通,辅助电加热器的出口通过第二管道与化盐炉连通。Further: an auxiliary electric heater is also included, the inlet of the auxiliary electric heater communicates with the molten salt pipeline, and the outlet of the auxiliary electric heater communicates with the salt furnace through the second pipeline.
进一步地:所述第一管道和第二管道上分别安装有阀门和温度测量仪。Further: valves and temperature measuring instruments are respectively installed on the first pipeline and the second pipeline.
进一步地:所述辅助电加热器中使用的电能来源于弃风电、弃光电或低谷电。Further: the electric energy used in the auxiliary electric heater comes from abandoned wind power, abandoned photovoltaic power or low valley power.
进一步地:所述换热器的数量为多个,多个换热器采用并联安装方式。Further: there are multiple heat exchangers, and multiple heat exchangers are installed in parallel.
进一步地:所述换热器的数量为多个,多个换热器采用串联安装方式。Further: there are multiple heat exchangers, and multiple heat exchangers are installed in series.
进一步地:相邻的两个换热器之间通过二次熔盐管道连通。Further: two adjacent heat exchangers are connected through secondary molten salt pipelines.
进一步地:所述二次熔盐管道上安装有阀门和温度测量仪。Further: valves and temperature measuring instruments are installed on the secondary molten salt pipeline.
进一步地:所述换热器为管壳式换热器、列管式换热器或板式换热器。Further: the heat exchanger is a shell-and-tube heat exchanger, a shell-and-tube heat exchanger or a plate heat exchanger.
1.本发明的化盐系统,解决了常规光热电站固态熔盐均通过天然气化盐炉系统进行化盐,而常规的天然气化盐炉实现化盐过程,受炉加热能力、天然气用量等因素限制,整个化盐周期得不到保障,且化盐成本居高不下。1. The salt melting system of the present invention solves the problem that the solid molten salt of conventional photothermal power plants is converted into salt through the natural gas salt furnace system, while the conventional natural gas salt furnace realizes the salt conversion process, the heating capacity of the furnace, the amount of natural gas and other factors Due to restrictions, the entire cycle of salt melting cannot be guaranteed, and the cost of salt melting remains high.
2.本发明利用光热发电系统进行化盐工作,这样发电和化盐两不误,且化盐能力远大于化盐炉系统;2. The present invention utilizes the photothermal power generation system to carry out the salt conversion work, so that both power generation and salt conversion are correct, and the salt conversion capacity is much greater than that of the salt furnace system;
3.本发明在白天有太阳时,用光热化盐,夜晚没有太阳时,利用电加热吸收弃电或低谷电进行化盐,有效缩短了化盐的周期。3. In the present invention, when there is sun in the daytime, salt is converted by light and heat, and when there is no sun at night, electric heating is used to absorb abandoned electricity or low-peak electricity to convert salt, which effectively shortens the cycle of salt conversion.
4.本发明与常规的化盐方式相比,通过光热方式实现化盐,其化盐速度显著提高,并且该系统结构简单,系统运行简便,安全性高,节能环保。4. Compared with the conventional way of salt melting, the present invention realizes salt melting through photothermal method, and its speed of salt melting is significantly improved, and the system has simple structure, easy operation, high safety, energy saving and environmental protection.
5.本发明与常规的化盐方式相比,常规的化盐方式受设备环境、设备自身、厂房环境影响,盐的清洁度低,而通过光热换热方式进行化盐,清洁高效。5. Compared with the conventional salt conversion method, the present invention is affected by the equipment environment, the equipment itself, and the plant environment, and the cleanliness of the salt is low, while the salt conversion is performed by the light-heat heat exchange method, which is clean and efficient.
6.采用本发明的化盐方案,将硝酸钠和硝酸钾破碎后按比例输送至化盐炉内,采用电加热器进行初始化盐后,利用熔盐循环泵将化盐炉中的低温液态熔盐泵入油盐换热器中,通过太阳能集热场吸收太阳能的高温导热油将油盐换热器中的低温熔盐加热到高温状态后输送回化盐炉,高温液态盐与常温固体熔盐混合后形成270℃以上低温液态熔盐,并输送存储至熔盐储罐中。6. Using the salt solution solution of the present invention, the sodium nitrate and potassium nitrate are crushed and transported to the salt furnace in proportion. After initializing the salt with an electric heater, the low-temperature liquid in the salt furnace is melted The salt is pumped into the oil-salt heat exchanger, and the low-temperature molten salt in the oil-salt heat exchanger is heated to a high temperature state by the high-temperature heat-conducting oil that absorbs solar energy through the solar heat collection field, and then transported back to the salt furnace. After the salt is mixed, it forms a low-temperature liquid molten salt above 270°C, which is transported and stored in a molten salt storage tank.
光热化盐系统的化盐速度超过210 t/h,是传统化盐速度的5-7倍,光热化盐将太阳能作为化盐所需热量的来源,无需任何化石燃料,清洁环保。由于利用光热电站原有的换热设备,节省了建设成本。化盐完成后,配套的上料系统可拆卸回收重复利用,化盐炉及电加热器可直接转换为高温储能系统,用于吸收弃风弃光,实现能量存储。The salt melting speed of the photothermal salt system exceeds 210 t/h, which is 5-7 times faster than the traditional salt melting speed. Photothermal salt uses solar energy as the heat source for salt melting, without any fossil fuels, and is clean and environmentally friendly. Due to the use of the original heat exchange equipment of the photothermal power station, the construction cost is saved. After the salt is completed, the supporting feeding system can be disassembled and recycled for reuse, and the salt furnace and electric heater can be directly converted into a high-temperature energy storage system, which is used to absorb abandoned wind and light, and realize energy storage.
7.采用本发明的化盐系统,其化盐速度超过210吨/小时,比传统化盐速度快五倍,每天可以超过4000吨,是之前单日化盐世界纪录的四倍以上,如果连续融化7万吨盐只需两周半,比传统的化盐方式快两个月,提前实现储能系统发电,节省化盐的化石燃料千万元,设备投资也较传统化盐系统节省20%。7. Using the salt melting system of the present invention, the salt melting speed exceeds 210 tons per hour, which is five times faster than the traditional salt melting speed, and can exceed 4,000 tons per day, which is more than four times the previous single-day salt melting world record. It only takes two and a half weeks to melt 70,000 tons of salt, which is two months faster than the traditional way of salt melting. The energy storage system can generate electricity in advance, saving tens of millions of fossil fuels for salt melting, and saving 20% in equipment investment compared with traditional salt melting systems. .
图1为基于导热油太阳能集热场的化盐系统示意图;Figure 1 is a schematic diagram of a salt chemical system based on a heat transfer oil solar heat collection field;
图2为具体实施方式二中化盐系统的构成图;Fig. 2 is the composition diagram of the chemical salt system in the second specific embodiment;
图3是具体实施方式二中换热器的化盐系统的构成图;Fig. 3 is the configuration diagram of the salt-dissolving system of the heat exchanger in the second specific embodiment;
图4是传统的化盐方式与本发明化盐方式的化盐量与化盐周期关系示意图;Fig. 4 is a schematic diagram of the relationship between the amount of salt and the cycle of salt in the traditional way of salt and in the way of salt in the present invention;
图中,1-化盐炉,2-换热器,3-熔盐储罐,4-熔盐管道,5-输送泵,6-导热油太阳能集热场,7-二次熔盐管道,8-阀门,9-温度测量仪,10-辅助电加热器,11-第一管道,12-第二管道,14-循环泵,21-熔盐入口,22-熔盐出口,23-热源出口,24-热源入口。In the figure, 1-salt furnace, 2-heat exchanger, 3-molten salt storage tank, 4-molten salt pipeline, 5-transport pump, 6-heat transfer oil solar thermal field, 7-secondary molten salt pipeline, 8-Valve, 9-Temperature measuring instrument, 10-Auxiliary electric heater, 11-First pipeline, 12-Second pipeline, 14-Circulation pump, 21-Molten salt inlet, 22-Molten salt outlet, 23-Heat source outlet , 24-Heat source inlet.
为使本发明的目的、技术方案和优点更加清楚明了,下面通过附图中示出的具体实施例来描述本发明。但是应该理解,这些描述只是示例性的,而并非要限制本发明的范围。此外,在以下说明中,省略了对公知结构和技术的描述,以避免不必要地混淆本发明的概念。In order to make the object, technical solution and advantages of the present invention clearer, the present invention is described below through specific embodiments shown in the accompanying drawings. It should be understood, however, that these descriptions are exemplary only and are not intended to limit the scope of the present invention. Also, in the following description, descriptions of well-known structures and techniques are omitted to avoid unnecessarily obscuring the concept of the present invention.
具体实施方式一:Specific implementation mode one:
参照图1所示,本实施方式提供一种基于导热油集热场的太阳能光热电站化盐系统,包括化盐炉1、换热器2和熔盐储罐3,所述换热器2具有熔盐入口21、熔盐出口22、热源出口23和热源入口24,所述化盐炉1通过熔盐管道4连通换热器2的熔盐入口21,化盐炉1通过输送泵5与熔盐储罐3连通,换热器2的熔盐出口22通过第一管道11与化盐炉1连通,所述换热器2的热源出口23、热源入口24与导热油太阳能集热场6建立连接关系,导热油太阳能集热场6用于给换热器2提供换热热源。Referring to Fig. 1 , this embodiment provides a salt chemical system of a solar thermal power station based on a thermal oil heat collection field, including a salt furnace 1, a heat exchanger 2 and a molten salt storage tank 3, and the heat exchanger 2 It has a molten salt inlet 21, a molten salt outlet 22, a heat source outlet 23 and a heat source inlet 24. The salt furnace 1 is connected to the molten salt inlet 21 of the heat exchanger 2 through a molten salt pipeline 4, and the salt furnace 1 is connected to the heat exchanger 2 through a delivery pump 5. The molten salt storage tank 3 is connected, and the molten salt outlet 22 of the heat exchanger 2 is connected with the salt furnace 1 through the first pipeline 11, and the heat source outlet 23 and the heat source inlet 24 of the heat exchanger 2 are connected with the heat transfer oil solar heat collection field 6 The connection relationship is established, and the heat transfer oil solar heat collection field 6 is used to provide the heat exchange heat source for the heat exchanger 2 .
其中,在化盐炉1中,固体盐与高温熔盐在化盐炉1中混合后,形成中温液体熔融盐,该中温液体熔盐一部分通过输送泵5送入熔盐储罐3中储存,另一部分通过循环泵打入到换热器2内,利用换热器2将中温熔盐加热到高温熔融盐,然后将高温熔融盐通过循环泵输送至化盐炉1内,再次用于化盐工作,以此形成循环化盐工作;Wherein, in the chemical salt furnace 1, after the solid salt and the high-temperature molten salt are mixed in the chemical salt furnace 1, a medium-temperature liquid molten salt is formed, and a part of the medium-temperature liquid molten salt is sent to the molten salt storage tank 3 through the delivery pump 5 for storage. The other part is driven into the heat exchanger 2 through the circulation pump, and the medium-temperature molten salt is heated to the high-temperature molten salt by the heat exchanger 2, and then the high-temperature molten salt is transported to the salt furnace 1 through the circulation pump, and is used again for the salt work, thus forming a cycle of salt work;
在本实施方式中,换热器2为导热油换热器,系统进行化盐工作时,将固体盐与300-400度高温熔盐在化盐炉1中混合后,形成280-340度中温液体熔融盐,形成的中温液体熔融盐一路通过输送泵5送入熔盐储罐3储存,另一部分通过循环泵自熔盐入口21打入换热器2内,与此同时,将导热油太阳能集热场6与换热器2的热源出口23和热源入口24连通,将导热油太阳能集热场6中的吸收热量的高温导热油输送到换热器2内,在换热器2内部,使用高温导热油将热量换给进入到换热器2内的中温熔融盐,使中温熔融盐(280-340℃)的温度达到高温熔融盐(300-400℃),随后,将该高温熔融盐通过第一管道11输送至化盐炉1内,用于再次完成化盐工作,输送的量保证新加入到化盐炉1内的固体熔盐能够达到一定温度,并将固体熔盐融化,重复上述步骤实现循环化盐工作。In this embodiment, the heat exchanger 2 is a heat-conducting oil heat exchanger. When the system is working in the salt process, solid salt and 300-400 degree high temperature molten salt are mixed in the salt furnace 1 to form a 280-340 degree medium temperature Liquid molten salt, the formed medium-temperature liquid molten salt is sent to the molten salt storage tank 3 through the delivery pump 5 for storage, and the other part is pumped into the heat exchanger 2 from the molten salt inlet 21 through the circulation pump. The heat collecting field 6 communicates with the heat source outlet 23 and the heat source inlet 24 of the heat exchanger 2, and transports the high-temperature heat transfer oil absorbing heat in the heat transfer oil solar heat collecting field 6 to the heat exchanger 2, and inside the heat exchanger 2, Use high-temperature heat conduction oil to exchange heat to the medium-temperature molten salt entering the heat exchanger 2, so that the temperature of the medium-temperature molten salt (280-340°C) reaches the temperature of the high-temperature molten salt (300-400°C), and then, the high-temperature molten salt It is transported into the salt furnace 1 through the first pipeline 11, and is used to complete the work of salt again. The amount of transportation ensures that the solid molten salt newly added to the salt furnace 1 can reach a certain temperature, and the solid molten salt is melted, and the process is repeated. The above-mentioned steps realize the work of circulating salt.
本实施方式中的化盐系统,解决了常规光热电站固态熔盐均通过天然气化盐炉系统进行化盐,而常规的天然气化盐炉实现化盐过程,受炉加热能力、天然气用量等因素限制,整个化盐周期较长,且化盐成本的建设和运营成本较高。The salt melting system in this embodiment solves the problem that the solid molten salt of conventional photothermal power plants is converted into salt through the natural gas salt furnace system, while the conventional natural gas salt furnace realizes the salt conversion process, the heating capacity of the furnace, the amount of natural gas and other factors Due to the limitation, the whole cycle of salt melting is long, and the construction and operation costs of salt melting are relatively high.
采用本实施方式的化盐系统,该系统利用光热电站的发电和储热系统进行化盐工作,这样发电和化盐两不误,且化盐能力远大于传统天然气化盐炉系统;Using the salt melting system of this embodiment, the system utilizes the power generation and heat storage system of the photothermal power station to carry out the salt melting work, so that both power generation and salt melting are correct, and the salt melting capacity is much greater than that of the traditional natural gas salt melting furnace system;
换热器2内部,使用高温导热油将热量换给进入到换热器2内的中温熔融盐,使中温熔融盐的温度达到高温熔融盐。其中导热油来源于导热油太阳能集热场6,采用太阳能镜场方式实现加热所述换热器2中的导热油。其中换热器2内的导热油来源于太阳能镜场,具体使用的是槽式太阳能集热器,利用槽式太阳能集热器,加热管道内的导热油,利用太阳能转化为热能,利用转换的热能进行化盐工作,减少了大型光热电站熔盐项目天然气使用量,降低了化盐成本。同时充分利用太阳能,提高了环境效益。Inside the heat exchanger 2, high-temperature heat transfer oil is used to exchange heat to the medium-temperature molten salt entering the heat exchanger 2, so that the temperature of the medium-temperature molten salt reaches the high-temperature molten salt. The heat-conducting oil comes from the heat-conducting oil solar heat collection field 6, and the heat-conducting oil in the heat exchanger 2 is heated by means of a solar mirror field. The heat transfer oil in the heat exchanger 2 is derived from the solar mirror field, and a trough solar collector is used specifically. The trough solar collector is used to heat the heat transfer oil in the pipeline, and the solar energy is converted into heat energy. Thermal energy is used for salt conversion, which reduces the amount of natural gas used in molten salt projects in large-scale photothermal power plants and reduces the cost of salt conversion. At the same time, solar energy is fully utilized to improve environmental benefits.
在本实施方式中,化盐炉1用于将粉碎后的固体熔盐转化为液态熔,化盐炉1是用于实现化盐的容器;所述换热器2为管壳式换热器、列管式换热器或板式换热器。In this embodiment, the salt furnace 1 is used to convert the pulverized solid molten salt into liquid molten salt, and the salt furnace 1 is a container for realizing the salt; the heat exchanger 2 is a shell-and-tube heat exchanger , shell and tube heat exchanger or plate heat exchanger.
具体实施方式二:Specific implementation mode two:
参照图1和图2,在具体实施方式一的基础上,还包括辅助电加热器10,辅助电加热器10的入口与熔盐管道4连通,辅助电加热器10的出口通过第二管道12与化盐炉1连通;Referring to Fig. 1 and Fig. 2, on the basis of the specific embodiment one, an auxiliary electric heater 10 is also included, the inlet of the auxiliary electric heater 10 communicates with the molten salt pipeline 4, and the outlet of the auxiliary electric heater 10 passes through the second pipeline 12 Connected with the salt furnace 1;
具体的:化盐炉1中的中温熔盐一部分流入到换热器2和/或辅助电加热器10内,利用换热器2和/或辅助电加热器10将中温熔盐加热到高温熔融盐,然后将高温熔融盐通过循环泵输送至化盐炉1内,实现循环化盐工作;Specifically: a part of the medium-temperature molten salt in the chemical salt furnace 1 flows into the heat exchanger 2 and/or the auxiliary electric heater 10, and the medium-temperature molten salt is heated to high temperature melting by the heat exchanger 2 and/or the auxiliary electric heater 10 salt, and then the high-temperature molten salt is transported to the salt furnace 1 through a circulating pump to realize the circulation of salt;
系统进行化盐工作时,将固体盐与300-400度高温熔盐在化盐炉1中混合后,形成280-340度中温液体熔融盐,形成的中温液体熔融盐一路通过输送泵5送入熔盐储罐3储存,另一部分通过循环泵14打入换热器2或辅助电加热器10内,经过换热器2或辅助电加热器10,将中温液体熔融盐(280-340℃)加热转化为高温液体熔融盐(300-400℃),随后,将该高温熔融盐输送至化盐炉1内实现循环化盐,输送的量保证新加入到化盐炉1内的固体熔盐能够达到一定温度,并将固体熔盐融化。When the system is working on melting salt, solid salt and 300-400 degree high temperature molten salt are mixed in the salt furnace 1 to form 280-340 degree medium temperature liquid molten salt, and the formed medium temperature liquid molten salt is sent through the delivery pump 5 all the way The molten salt storage tank 3 is stored, and the other part is pumped into the heat exchanger 2 or the auxiliary electric heater 10 through the circulation pump 14, and the medium-temperature liquid molten salt (280-340°C) is passed through the heat exchanger 2 or the auxiliary electric heater 10 Heating and transforming into high-temperature liquid molten salt (300-400°C), and then transporting the high-temperature molten salt to the salt furnace 1 to realize the circulation of salt, the amount of delivery ensures that the solid molten salt newly added to the salt furnace 1 can Reach a certain temperature and melt the solid molten salt.
辅助电加热器10的数量为多个,多个辅助电加热器10采用并联或串联的方式布置在整个化盐系统中;The number of auxiliary electric heaters 10 is multiple, and multiple auxiliary electric heaters 10 are arranged in the whole chemical salt system in parallel or in series;
在本实施方式中,采用本实施方式化盐系统,其化盐速度超过210吨/小时,比传统化盐速度快五倍,每天可以超过4000吨,是之前单日化盐世界纪录的四倍以上,如果连续融化7万吨盐只需两周半,比传统的化盐方式快两个月,可以提前实现储热岛发电,节省化盐的化石燃料千万元,设备投资也较传统化盐系统节省20%,具体对比如图所示:In this embodiment, using the salt chemical system of this embodiment, the salt chemical speed exceeds 210 tons per hour, which is five times faster than the traditional salt chemical process, and can exceed 4,000 tons per day, which is four times the previous single-day salt chemical world record As mentioned above, if it only takes two and a half weeks to melt 70,000 tons of salt continuously, which is two months faster than the traditional way of salt melting, it can realize heat storage island power generation in advance, save tens of millions of fossil fuels for salt melting, and the investment in equipment is also higher than that of traditional salt melting The system saves 20%, the specific comparison is shown in the figure:
表1、光热化盐系统与传统化盐系统对比Table 1. Comparison of photothermal salt system and traditional salt system
需要说明的是,在太阳能发电项目中,目前国际上常规化盐系统均采用天然气化盐炉,利用天然气燃烧后的烟气提供热量,使固态熔盐熔化为液态。It should be noted that in solar power generation projects, the current international conventional salt system uses natural gas salt furnace, which uses the flue gas after natural gas combustion to provide heat to melt solid molten salt into a liquid state.
当某一太阳能发电项目需要化盐时,常规的方式是购买天然气化盐炉,然后利用天然气燃烧后的烟气提供热量,使固态熔盐熔化为液态;When a solar power generation project needs salt, the conventional way is to buy a natural gas salt furnace, and then use the flue gas after natural gas combustion to provide heat to melt the solid molten salt into a liquid state;
与常规的化盐方式不同的是,本实施例中,采用太阳能发电场的原有设备进行化盐作业,例如本实施例中使用的换热器2、导热油太阳能集热场6均为发电厂现有的设备,该设备原有的作用是用于太阳能发电,在本实施例中,将其按照本实施例中各技术特征的配合、连接方式,组成化盐系统,将该系统用于实现化盐,这样即节省了采购、建设天然气化盐炉的成本,降低了化盐过程二氧化碳排放,并且利用现有设备实现化盐的方式提高了化盐速度和化盐周期(如图4所示);Different from the conventional way of salt melting, in this embodiment, the original equipment of the solar power plant is used to carry out the salt melting operation. The existing equipment in the factory, the original function of this equipment is to use solar power to generate electricity, in this embodiment, according to the coordination and connection mode of each technical feature in this embodiment, form a salt system, and use this system for Realize salt conversion, which saves the cost of purchasing and building natural gas salt conversion furnaces, reduces carbon dioxide emissions in the salt conversion process, and uses existing equipment to achieve salt conversion speed and salt conversion cycle (as shown in Figure 4 Show);
需要说明的是:在光热电站项目所使用的储热介质为高温熔盐,以乌拉特中旗100 MW级槽式导热油光热发电项目为例,电站配备有高温熔盐储热系统,该系统使用的高温熔盐为质量分数40%的硝酸钾和60%的硝酸钠的混合物。熔盐储能系统投运前须先将固体熔盐熔化并注入冷盐罐中,这一步骤(化盐)对储热系统调试的顺利开展以及正式投运都具有至关重要的作用。目前国际上常规化盐系统均采用天然气化盐炉,利用天然气燃烧后的烟气提供热量,使固态熔盐熔化为液态。这种常规化盐系统不仅化盐速率低下,无法在短期内使储热系统正常投运,而且需要消耗大量的化石燃料,与“双碳”承诺相悖。而受限于熔盐熔化温度高、化盐系统技术难点多等特点,国内外对于高速、低碳新型化盐技术的实践探索几乎为零。It should be noted that the heat storage medium used in the solar-thermal power station project is high-temperature molten salt. Taking the 100 MW trough-type heat-conducting oil solar-thermal power generation project in Wulate Zhongqi as an example, the power station is equipped with a high-temperature molten salt heat storage system. The high-temperature molten salt used in the system is a mixture of 40% potassium nitrate and 60% sodium nitrate by mass fraction. Before the molten salt energy storage system is put into operation, the solid molten salt must be melted and injected into the cold salt tank. This step (saltification) plays a vital role in the smooth commissioning and official commissioning of the heat storage system. At present, the conventional salt melting systems in the world all use natural gas salt melting furnaces, which use the flue gas after natural gas combustion to provide heat to melt the solid molten salt into a liquid state. This conventional salt conversion system not only has a low rate of salt conversion and cannot put the heat storage system into normal operation in a short period of time, but also consumes a large amount of fossil fuels, which is contrary to the "double carbon" commitment. However, limited by the high melting temperature of molten salt and many technical difficulties in the salt melting system, practical exploration of high-speed, low-carbon new salt melting technology at home and abroad is almost zero.
使用本实施方式的化盐系统能够确保光热发电和化盐两不误,在光热发电项目中,用于实现化盐具有十分重要的意义。The use of the salt chemical system of this embodiment can ensure both solar thermal power generation and salt chemical conversion, and it is of great significance to realize salt chemical conversion in a solar thermal power generation project.
具体实施方式三:Specific implementation mode three:
参照图1、图2所示,并在具体实施方式一和具体实施方式二的基础上,所述第一管道11和第二管道12上分别安装有阀门8和温度测量仪9,阀门8用于控制管道的开关,温度测量仪8用于测量管道内流体温度。利用阀门8和温度测量仪9的信息交互,实时监控第一管道11和第二管道12内熔融盐的开启和关闭,确保化盐工作顺利进行。With reference to Fig. 1, shown in Fig. 2, and on the basis of specific embodiment one and specific embodiment two, valve 8 and temperature measuring instrument 9 are respectively installed on described first pipeline 11 and second pipeline 12, valve 8 uses To control the switch of the pipeline, the temperature measuring instrument 8 is used to measure the temperature of the fluid in the pipeline. The opening and closing of the molten salt in the first pipeline 11 and the second pipeline 12 is monitored in real time by using the information interaction between the valve 8 and the temperature measuring instrument 9, so as to ensure the smooth progress of the salt melting work.
具体实施方式四:Specific implementation mode four:
在具体实施方式二的基础上,所述辅助电加热器10中使用的电能来源于弃风电、弃光电、低谷电等低成本电,该电能的成本低于常规发电站提供的电能的成本。On the basis of Embodiment 2, the electric energy used in the auxiliary electric heater 10 comes from low-cost electricity such as abandoned wind power, abandoned photovoltaic power, and low-peak electricity. The cost of this electric energy is lower than the cost of electric energy provided by conventional power stations.
具体实施方式五:Specific implementation mode five:
参照图3所示,本实施方式提供一种基于导热油集热场的太阳能光热电站化盐系统,与具体实施方式一不同的是,换热器2的数量为多个,多个换热器2采用并联安装方式。通过并联设置的多个换热器2可以实现同时加热280-340度的中温液体熔融盐,以达到300-400度高温熔盐,此外,还可以单独控制其中任意一个换热器2的工作/关闭,且不影响其他换热器2工作,在整个系统中,采用并联多个换热器2的方式具有灵活、使用方便、单一一个换热器2出现事故时,不影响整个化盐系统运行的优点。Referring to Fig. 3, this embodiment provides a solar thermal power station salt system based on a heat-conducting oil heat collection field. The difference from Embodiment 1 is that there are multiple heat exchangers 2, and multiple heat exchangers Device 2 is installed in parallel. Multiple heat exchangers 2 arranged in parallel can realize simultaneous heating of medium-temperature liquid molten salt at 280-340 degrees to reach high-temperature molten salt at 300-400 degrees. In addition, the work/work of any one of the heat exchangers 2 can also be individually controlled. It is closed without affecting the work of other heat exchangers 2. In the whole system, the method of connecting multiple heat exchangers 2 in parallel is flexible and easy to use. When an accident occurs in a single heat exchanger 2, it will not affect the operation of the entire salt chemical system The advantages.
具体实施方式六:Specific implementation method six:
参照图3所示,本实施方式提供一种基于导热油集热场的太阳能光热电站化盐系统,与具体实施方式一不同的是,所述换热器2的数量为多个,多个换热器2采用串联安装方式。采用串联换热器2,280-340度的中温液体熔融盐可以流经一条通路经过多次换热,以达到300-400度高温熔盐,并且采用串联的方式整个系统只有一条通路,方便开关控制整个系统。Referring to Fig. 3, this embodiment provides a solar thermal power station salt system based on a heat-conducting oil heat collection field. The difference from Embodiment 1 is that the number of heat exchangers 2 is multiple, and multiple The heat exchanger 2 is installed in series. Using series heat exchanger 2, medium temperature liquid molten salt at 280-340 degrees can flow through one channel and undergo multiple heat exchanges to achieve high temperature molten salt at 300-400 degrees, and the whole system has only one channel in series, which is convenient for switching control the entire system.
具体实施方式七:Specific implementation mode seven:
参照图3所示,在具体实施方式五的基础上,相邻的两个换热器2之间通过二次熔盐管道7连通。并在所述二次熔盐管道7上安装有用于打开/关闭二次熔盐管道7的阀门8和用于测量二次熔盐管道7内流通液态熔盐温度的温度测量仪8。如此设置,化盐炉1流出的280-340度中温液体熔融盐进入到换热器2,在换热器2内,将280-340度中温液体熔融盐提高到300-400度高温熔盐;若换热器2内的中温液体熔融盐不能有效换热到高温熔盐温度值状态时,所述二次熔盐管道7开启,将液态熔盐再次输送到并联的另一换热器2内,进一步对液态熔盐进行换热,直至达到300-400度高温熔盐状态。Referring to FIG. 3 , on the basis of Embodiment 5, two adjacent heat exchangers 2 are communicated through a secondary molten salt pipeline 7 . A valve 8 for opening/closing the secondary molten salt pipeline 7 and a temperature measuring instrument 8 for measuring the temperature of liquid molten salt circulating in the secondary molten salt pipeline 7 are installed on the secondary molten salt pipeline 7 . With such arrangement, the 280-340°C medium-temperature liquid molten salt flowing out of the salt furnace 1 enters the heat exchanger 2, and in the heat exchanger 2, the 280-340°C medium-temperature liquid molten salt is raised to a 300-400°C high-temperature molten salt; If the medium-temperature liquid molten salt in the heat exchanger 2 cannot effectively exchange heat to the high-temperature molten salt temperature state, the secondary molten salt pipeline 7 is opened to transport the liquid molten salt to another parallel heat exchanger 2 again , and further heat-exchange the liquid molten salt until it reaches a high temperature molten salt state of 300-400 degrees.
具体实施方式九:Specific implementation mode nine:
参照图1、图3所示,在具体实施方式五的基础上,换热器2用于将中温液体熔融盐(280-340℃)加热转化为高温液体熔融盐(300-400℃),其主要原理是,换热器2具有熔盐入口21、熔盐出口22、热源出口23和热源入口24,中温液体熔融盐自熔盐入口21进入到换热器2内,与热源出口23进入的热介质(例如导热油、热熔盐)进行换热,将中温液体熔融盐加热,形成高温液体熔融盐,该高温液体熔盐输送至化盐炉1内用于融化化盐炉1内的固体熔盐。Referring to Fig. 1 and Fig. 3, on the basis of the fifth specific embodiment, the heat exchanger 2 is used to heat and convert medium-temperature liquid molten salt (280-340°C) into high-temperature liquid molten salt (300-400°C). The main principle is that the heat exchanger 2 has a molten salt inlet 21, a molten salt outlet 22, a heat source outlet 23 and a heat source inlet 24; The heat medium (such as heat conduction oil, hot molten salt) performs heat exchange, heats the medium-temperature liquid molten salt to form high-temperature liquid molten salt, and the high-temperature liquid molten salt is transported to the salt furnace 1 to melt the solid in the salt furnace 1 molten salt.
在本实施方式中,高温熔盐温度可以在370度上下浮动,浮动范围70度(最高不超过600度),中温盐310度上下浮动,浮动范围30度。In this embodiment, the temperature of high-temperature molten salt can fluctuate up and down 370 degrees, with a floating range of 70 degrees (up to 600 degrees), and the temperature of medium-temperature salt can fluctuate up and down 310 degrees, with a floating range of 30 degrees.
具体实施方式十:Specific implementation mode ten:
结合具体实施方式一,所述换热器2为管壳式换热器、列管式换热器或板式换热器。With reference to the first embodiment, the heat exchanger 2 is a shell-and-tube heat exchanger, a tube-and-tube heat exchanger or a plate heat exchanger.
需要注意的是,这里所使用的术语仅是为了描述具体实施方式,而非意图限制根据本申请的示例性实施方式。如在这里所使用的,除非上下文另外明确指出,否则单数形式也意图包括复数形式,此外,还应当理解的是,当在本说明书中使用术语“包含”和/或“包括”时,其指明存在特征、步骤、操作、器件、组件和/或它们的组合。It should be noted that the terminology used here is only used to describe specific implementations, and is not intended to limit the exemplary implementations according to the present application. As used herein, unless the context clearly dictates otherwise, the singular is intended to include the plural, and it should also be understood that when the terms "comprising" and/or "comprising" are used in this specification, they mean There are features, steps, operations, means, components and/or combinations thereof.
除非另外具体说明,否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。同时,应当明白,为了便于描述,附图中所示出的各个部分的尺寸并不是按照实际的比例关系绘制的。对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论,但在适当情况下,所述技术、方法和设备应当被视为授权说明书的一部分。在这里示出和讨论的所有示例中,任何具体值应被解释为仅仅是示例性的,而不是作为限制。因此,示例性实施例的其它示例可以具有不同的值。应注意到:相似的标号和字母在下面的附图中表示类似项,因此,一旦某一项在一个附图中被定义,则在随后的附图中不需要对其进行进一步讨论。The relative arrangements of components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise. At the same time, it should be understood that, for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship. Techniques, methods and devices known to those of ordinary skill in the relevant art may not be discussed in detail, but where appropriate, such techniques, methods and devices should be considered part of the Authorized Specification. In all examples shown and discussed herein, any specific values should be construed as illustrative only, and not as limiting. Therefore, other examples of the exemplary embodiment may have different values. It should be noted that like numerals and letters denote like items in the following figures, therefore, once an item is defined in one figure, it does not require further discussion in subsequent figures.
在本发明的描述中,需要理解的是,方位词如“前、后、上、下、左、右”、“横向、竖向、垂直、水平”和“顶、底”等所指示的方位或位置关系通常是基于附图所示的方位或位置关系,仅是为了便于描述本发明和简化描述,在未作相反说明的情况下,这些方位词并不指示和暗示所指的装置或元件必须具有特定的方位或者以特定的方位构造和操作,因此不能理解为对本发明保护范围的限制;方位词“内、外”是指相对于各部件本身的轮廓的内外。In the description of the present invention, it should be understood that orientation words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" etc. indicate the orientation Or positional relationship is generally based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the present invention and simplifying the description. In the absence of a contrary description, these orientation words do not indicate or imply the device or element referred to. It must have a specific orientation or be constructed and operated in a specific orientation, so it should not be construed as limiting the protection scope of the present invention; the orientation words "inner and outer" refer to the inner and outer relative to the outline of each component itself.
为了便于描述,在这里可以使用空间相对术语,如“在……之上”、“在……上方”、“在……上表面”、“上面的”等,用来描述如在图中所示的一个器件或特征与其他器件或特征的空间位置关系。应当理解的是,空间相对术语旨在包含除了器件在图中所描述的方位之外的在使用或操作中的不同方位。例如,如果附图中的器件被倒置,则描述为“在其他器件或构造上方”或“在其他器件或构造之上”的器件之后将被定位为“在其他器件或构造下方”或“在其他器件或构造之下”。因而,示例性术语“在……上方”可以包括“在……上方”和“在……下方”两种方位。该器件也可以其他不同方式定位(旋转90度或处于其他方位),并且对这里所使用的空间相对描述作出相应解释。For the convenience of description, spatially relative terms may be used here, such as "on ...", "over ...", "on the surface of ...", "above", etc., to describe the The spatial positional relationship between one device or feature shown and other devices or features. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, devices described as "above" or "above" other devices or configurations would then be oriented "beneath" or "above" the other devices or configurations. under other devices or configurations". Thus, the exemplary term "above" can encompass both an orientation of "above" and "beneath". The device may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptions used herein interpreted accordingly.
需要说明的是,本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象,而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换,以便这里描述的本申请的实施方式能够以除了在这里图示或描述的那些以外的顺序实施。It should be noted that the terms "first" and "second" in the description and claims of the present application and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the application described herein can be practiced in sequences other than those illustrated or described herein.
需要说明的是,在以上实施例中,只要不矛盾的技术方案都能够进行排列组合,本领域技术人员能够根据排列组合的数学知识穷尽所有可能,因此本发明不再对排列组合后的技术方案进行一一说明,但应该理解为排列组合后的技术方案已经被本发明所公开。It should be noted that, in the above embodiments, as long as the technical solutions that do not contradict each other can be permutated and combined, those skilled in the art can exhaust all possibilities according to the mathematical knowledge of permutations and combinations, so the present invention is no longer concerned with the technical solutions after permutations and combinations. Each will be described, but it should be understood that the technical solutions after permutation and combination have been disclosed by the present invention.
本实施方式只是对本专利的示例性说明,并不限定它的保护范围,本领域技术人员还可以对其局部进行改变,只要没有超出本专利的精神实质,都在本专利的保护范围内。This embodiment is only an exemplary description of this patent, and does not limit its protection scope. Those skilled in the art can also make partial changes to it, as long as it does not exceed the spirit and essence of this patent, all within the protection scope of this patent.
Claims (9)
- 一种基于导热油集热场的太阳能光热电站化盐系统,其特征在于:包括化盐炉(1)、换热器(2)和熔盐储罐(3),所述换热器(2)具有熔盐入口(21)、熔盐出口(22)、热源出口(23)和热源入口(24),所述化盐炉(1)通过熔盐管道(4)连通换热器(2)的熔盐入口(21),化盐炉(1)通过输送泵(5)与熔盐储罐(3)连通,换热器(2)的熔盐出口(22)通过第一管道(11)与化盐炉(1)连通,所述换热器(2)的热源出口(23)、热源入口(24)与导热油太阳能集热场(6)建立连接关系,导热油太阳能集热场(6)用于给换热器(2)提供换热热源。A salt melting system of a solar thermal power station based on a thermal oil heat collection field, characterized in that it includes a salt melting furnace (1), a heat exchanger (2) and a molten salt storage tank (3), and the heat exchanger ( 2) It has a molten salt inlet (21), a molten salt outlet (22), a heat source outlet (23) and a heat source inlet (24), and the salt furnace (1) is connected to a heat exchanger (2) through a molten salt pipeline (4) ), the molten salt furnace (1) communicates with the molten salt storage tank (3) through the transfer pump (5), and the molten salt outlet (22) of the heat exchanger (2) passes through the first pipeline (11 ) is connected with the chemical salt furnace (1), and the heat source outlet (23), heat source inlet (24) of the heat exchanger (2) establishes a connection relationship with the heat transfer oil solar heat collection field (6), and the heat transfer oil solar heat collection field (6) is used to provide heat exchange heat source for the heat exchanger (2).
- 根据权利要求1所述的一种基于导热油集热场的太阳能光热电站化盐系统,其特征在于:还包括辅助电加热器(10),辅助电加热器(10)的入口与熔盐管道(4)连通,辅助电加热器(10)的出口通过第二管道(12)与化盐炉(1)连通。According to claim 1, a solar photothermal power plant salt system based on a heat-conducting oil heat collection field is characterized in that it also includes an auxiliary electric heater (10), the inlet of the auxiliary electric heater (10) and the molten salt The pipe (4) is connected, and the outlet of the auxiliary electric heater (10) is connected with the salt furnace (1) through the second pipe (12).
- 根据权利要求2所述的一种基于导热油集热场的太阳能光热电站化盐系统,其特征在于:所述第一管道(11)和第二管道(12)上分别安装有阀门(8)和温度测量仪(9)。According to claim 2, a solar thermal power plant salt system based on a thermal oil heat collection field, characterized in that valves (8) are respectively installed on the first pipeline (11) and the second pipeline (12) ) and temperature measuring instrument (9).
- 根据权利要求3所述的一种基于导热油集热场的太阳能光热电站化盐系统,其特征在于:所述辅助电加热器(10)中使用的电能来源于弃风电、弃光电或低谷电。According to claim 3, a solar photothermal power plant salt system based on a thermal oil heat collection field, characterized in that: the electric energy used in the auxiliary electric heater (10) comes from abandoned wind power, abandoned photovoltaic power or low valley Electricity.
- 根据权利要求1所述的一种基于导热油集热场的太阳能光热电站化盐系统,其特征在于:所述换热器(2)的数量为多个,多个换热器(2)采用并联安装方式。A solar thermal power plant salt salt system based on a thermal oil heat collection field according to claim 1, characterized in that: the number of said heat exchangers (2) is multiple, and multiple heat exchangers (2) Install in parallel.
- 根据权利要求1所述的一种基于导热油集热场的太阳能光热电站化盐系统,其特征在于:所述换热器(2)的数量为多个,多个换热器(2)采用串联安装方式。A solar thermal power plant salt salt system based on a thermal oil heat collection field according to claim 1, characterized in that: the number of said heat exchangers (2) is multiple, and multiple heat exchangers (2) Installed in series.
- 根据权利要求5所述的一种基于导热油集热场的太阳能光热电站化盐系统,其特征在于:相邻的两个换热器(2)之间通过二次熔盐管道(7)连通。According to claim 5, a solar photothermal power plant salt system based on a thermal oil heat collection field, characterized in that: a secondary molten salt pipeline (7) is passed between two adjacent heat exchangers (2) connected.
- 根据权利要求7所述的一种基于导热油集热场的太阳能光热电站化盐系统,其特征在于:所述二次熔盐管道(7)上安装有阀门(8)和温度测量仪(9)。According to claim 7, a solar thermal power plant salt system based on a thermal oil heat collection field, characterized in that: the secondary molten salt pipeline (7) is equipped with a valve (8) and a temperature measuring instrument ( 9).
- 根据权利要求1-2、5-7任意一项所述的一种基于导热油集热场的太阳能光热电站化盐系统,其特征在于:所述换热器(2)为管壳式换热器、列管式换热器或板式换热器。According to any one of claims 1-2, 5-7, a solar thermal power station salt system based on heat transfer oil heat collection field, characterized in that: the heat exchanger (2) is a shell-and-tube exchanger Heater, shell and tube heat exchanger or plate heat exchanger.
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Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN204185249U (en) * | 2014-11-10 | 2015-03-04 | 上海力脉环保设备有限公司 | A kind for the treatment of unit of abraum salt |
US20150128595A1 (en) * | 2012-05-10 | 2015-05-14 | Stamicarbon B.V. Acting Under The Name Of Mt Innovation Center | Method for modifying a solar thermal power plant operating on conventional oil based technology into a hybrid solar thermal power plant and such a hybrid solar thermal power plant |
CN106438237A (en) * | 2015-08-10 | 2017-02-22 | 中国电力工程顾问集团华北电力设计院有限公司 | Molten salt and conduction oil double heat storage solar thermal power generating system |
CN206207766U (en) * | 2016-10-24 | 2017-05-31 | 中国华能集团清洁能源技术研究院有限公司 | A kind of fused salt salt dissolving system of use line-focusing solar thermal-arrest |
CN207634246U (en) * | 2017-12-11 | 2018-07-20 | 北京中瑞蓝信电力技术有限公司 | It is honourable intimately to store up system of providing multiple forms of energy to complement each other |
CN208042859U (en) * | 2018-03-13 | 2018-11-02 | 蓝星(北京)化工机械有限公司 | A kind of preheating of fused salt storage tank and salt dissolving system |
CN110057115A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of light, electricity complementary trough photovoltaic power generation system and its operation method |
CN110068155A (en) * | 2018-04-19 | 2019-07-30 | 内蒙古电力勘测设计院有限责任公司 | A kind of fused salt linear Fresnel heat collecting field anti-condensation system and its method |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102013021479A1 (en) * | 2013-12-17 | 2015-06-18 | Linde Aktiengesellschaft | Solar thermal power plant |
CN105627799A (en) * | 2014-10-31 | 2016-06-01 | 中广核太阳能开发有限公司 | Stepped heat storage system and stepped heat storage method |
CN104456987A (en) * | 2014-12-18 | 2015-03-25 | 东北大学设计研究院(有限公司) | Solar heat storing-releasing system |
BR112017024562A2 (en) * | 2015-05-21 | 2018-07-24 | Basf Se | "container for storing a liquid, device for storing heat and use of the container" |
CN205717990U (en) * | 2016-06-11 | 2016-11-23 | 新疆硝石钾肥有限公司 | Solar energy thermo-power station fused salt passes heat storage medium salt equipment |
CN111320188A (en) * | 2018-12-14 | 2020-06-23 | 新特能源股份有限公司 | Fused salt electric heating system in solid caustic soda production |
CN109900001A (en) * | 2019-04-11 | 2019-06-18 | 南瑞集团有限公司 | A kind of wind light generation joint electric heat storage comprehensive energy supply system |
CN112128992A (en) * | 2020-09-17 | 2020-12-25 | 哈尔滨锅炉厂有限责任公司 | Salt dissolving device and salt dissolving method for photo-thermal power generation |
CN112325493A (en) * | 2020-11-12 | 2021-02-05 | 北京能脉科技有限公司 | Control equipment and method for improving salt melting efficiency of photo-thermal power station |
CN219898071U (en) * | 2021-06-23 | 2023-10-27 | 北京蓝海翌能新能源集团有限公司 | Salt dissolving system of solar photo-thermal power station based on heat conduction oil heat collection field |
-
2021
- 2021-06-23 CN CN202110696805.4A patent/CN113318675A/en active Pending
- 2021-07-23 ES ES202390247A patent/ES2960606R1/en active Pending
- 2021-07-23 WO PCT/CN2021/108092 patent/WO2022267155A1/en active Application Filing
Patent Citations (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20150128595A1 (en) * | 2012-05-10 | 2015-05-14 | Stamicarbon B.V. Acting Under The Name Of Mt Innovation Center | Method for modifying a solar thermal power plant operating on conventional oil based technology into a hybrid solar thermal power plant and such a hybrid solar thermal power plant |
CN204185249U (en) * | 2014-11-10 | 2015-03-04 | 上海力脉环保设备有限公司 | A kind for the treatment of unit of abraum salt |
CN106438237A (en) * | 2015-08-10 | 2017-02-22 | 中国电力工程顾问集团华北电力设计院有限公司 | Molten salt and conduction oil double heat storage solar thermal power generating system |
CN206207766U (en) * | 2016-10-24 | 2017-05-31 | 中国华能集团清洁能源技术研究院有限公司 | A kind of fused salt salt dissolving system of use line-focusing solar thermal-arrest |
CN207634246U (en) * | 2017-12-11 | 2018-07-20 | 北京中瑞蓝信电力技术有限公司 | It is honourable intimately to store up system of providing multiple forms of energy to complement each other |
CN208042859U (en) * | 2018-03-13 | 2018-11-02 | 蓝星(北京)化工机械有限公司 | A kind of preheating of fused salt storage tank and salt dissolving system |
CN110068155A (en) * | 2018-04-19 | 2019-07-30 | 内蒙古电力勘测设计院有限责任公司 | A kind of fused salt linear Fresnel heat collecting field anti-condensation system and its method |
CN110057115A (en) * | 2019-04-25 | 2019-07-26 | 上海锅炉厂有限公司 | A kind of light, electricity complementary trough photovoltaic power generation system and its operation method |
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