WO2016026351A1 - 太阳能热水辅助蓄热装置及由其构成的电厂锅炉太阳能热水供给系统 - Google Patents
太阳能热水辅助蓄热装置及由其构成的电厂锅炉太阳能热水供给系统 Download PDFInfo
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- WO2016026351A1 WO2016026351A1 PCT/CN2015/082768 CN2015082768W WO2016026351A1 WO 2016026351 A1 WO2016026351 A1 WO 2016026351A1 CN 2015082768 W CN2015082768 W CN 2015082768W WO 2016026351 A1 WO2016026351 A1 WO 2016026351A1
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D17/00—Domestic hot-water supply systems
- F24D17/0036—Domestic hot-water supply systems with combination of different kinds of heating means
- F24D17/0063—Domestic hot-water supply systems with combination of different kinds of heating means solar energy and conventional heaters
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- 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
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- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B39/00—Compounds having molecular sieve and base-exchange properties, e.g. crystalline zeolites; Their preparation; After-treatment, e.g. ion-exchange or dealumination
- C01B39/02—Crystalline aluminosilicate zeolites; Isomorphous compounds thereof; Direct preparation thereof; Preparation thereof starting from a reaction mixture containing a crystalline zeolite of another type, or from preformed reactants; After-treatment thereof
- C01B39/20—Faujasite type, e.g. type X or Y
- C01B39/22—Type X
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K5/00—Heat-transfer, heat-exchange or heat-storage materials, e.g. refrigerants; Materials for the production of heat or cold by chemical reactions other than by combustion
- C09K5/08—Materials not undergoing a change of physical state when used
- C09K5/14—Solid materials, e.g. powdery or granular
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- 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
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24S—SOLAR HEAT COLLECTORS; SOLAR HEAT SYSTEMS
- F24S21/00—Solar heat collectors not provided for in groups F24S10/00-F24S20/00
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B15/00—Sorption machines, plants or systems, operating continuously, e.g. absorption type
- F25B15/02—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas
- F25B15/06—Sorption machines, plants or systems, operating continuously, e.g. absorption type without inert gas the refrigerant being water vapour evaporated from a salt solution, e.g. lithium bromide
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B17/00—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type
- F25B17/08—Sorption machines, plants or systems, operating intermittently, e.g. absorption or adsorption type the absorbent or adsorbent being a solid, e.g. salt
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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
- F28D20/0056—Heat storage plants or apparatus in general; Regenerative heat-exchange apparatus not covered by groups F28D17/00 or F28D19/00 using solid heat storage material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/20—Solar thermal
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/40—Solar thermal energy, e.g. solar towers
- Y02E10/46—Conversion of thermal power into mechanical power, e.g. Rankine, Stirling or solar thermal engines
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/14—Thermal energy storage
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- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/129—Energy recovery, e.g. by cogeneration, H2recovery or pressure recovery turbines
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P20/00—Technologies relating to chemical industry
- Y02P20/10—Process efficiency
- Y02P20/133—Renewable energy sources, e.g. sunlight
Definitions
- the invention relates to a water supply system of a power plant boiler, in particular to a solar water hot water auxiliary heat storage device, and a solar water auxiliary power supply system for a power plant boiler comprising the heat storage device.
- boilers especially those of large power plants, consume a lot of energy such as coal, natural gas and biomass every day.
- energy due to its instability and intermittent reasons, it has not been included in the ranks of boiler fuel.
- solar energy temperature collectors have been developed, and energy storage technology has also made progress, making it possible to use solar energy as a supplementary fuel for boilers.
- biomass power plants As an example, solar energy as a supplementary fuel for boilers has a very special significance for biomass power plants, because the capacity of biomass power plants is often small, mostly between 30 and 50 MW, if only considered Solar energy supplements one-third of the boiler fuel, and its economic benefits will be considerable. At 30MW For example, in a biomass power plant, if you consider one-third of the fuel in a solar-powered boiler, you can save about 7 per year. With 10,000 tons of biomass fuel, fuel costs alone can save about 31.5 million yuan. In addition, since only one-third of the fuel of the boiler is considered, the solar equipment has a large footprint and is operable.
- the technical problem to be solved by the present invention is to provide a solar hot water auxiliary heat storage device and a solar water auxiliary supply system for a power plant boiler including the same, which can fully utilize solar energy as a supplementary fuel for a power plant boiler, and the boiler is in normal operation. Not affected by solar instability and intermittent, significantly reducing plant costs.
- the solar hot water auxiliary heat storage device comprises at least one molecular sieve heat storage bed and a hot water storage tank;
- the molecular sieve heat storage bed comprises a cylindrical heat storage bed shell, and the heat storage bed shell
- the two ends of the heat storage bed shell are provided with sealing valves and are respectively communicated with the gas inlet and outlet of the air preheater through the ventilation duct; the one end side of the heat storage bed shell is provided The water inlet is connected to the water outlet of the hot water storage tank, and the other end side is provided with a water outlet for delivering hot water to the subsequent equipment.
- the adsorbent layer is composed of a mixture of an adsorbent material and a metal powder having good thermal conductivity or a chemically polymerized adsorbent material produced by a chemical polymerization method.
- the adsorbent material in the adsorbent layer may be silica gel, natural zeolite, artificial zeolite, calcium chloride and composite adsorbent.
- the adsorbent material in the adsorbent layer is most preferably an artificial zeolite 13X molecular sieve.
- the heat storage bed casing is composed of a double-layer steel plate sandwich polyurethane insulation layer.
- the invention also provides a solar water auxiliary supply system for a power plant boiler comprising the above-mentioned solar hot water auxiliary heat storage device, comprising a condenser, a condensate pump, a shaft seal heater and a plurality of low-pressure heaters which are sequentially connected with the steam outlet of the steam turbine.
- a deaerator and a plurality of high-pressure heaters wherein the last stage high-pressure heater is connected to the water inlet of the boiler, and the water-passing pipes are provided with valves and pumps, and the ventilation pipes are provided with valves and fans, and solar energy is also included.
- the water inlet of the solar heat medium collector is connected with the water outlet of the shaft seal heater, and the water outlet of the solar heat medium collector is connected with the water inlet of the last stage low pressure heater;
- the water inlet of the solar secondary heater is connected with the water outlet of the solar heat medium collector, and the water outlet of the solar secondary heater is respectively connected with the water inlet of the last stage low pressure heater and the water inlet of the first stage high pressure heater.
- the water outlet of the molecular sieve heat storage bed of the solar hot water auxiliary heat storage device is in communication with the water inlet of the last stage low pressure heater.
- the solar primary heating device has a heat collection temperature of up to 100 Vacuum tube solar collector above °C.
- the solar secondary heating device is a trough solar collector or a CPC collector.
- the water outlet of the solar secondary heater is further connected with an absorption chiller, and the water outlet of the absorption chiller is connected to the water inlet of the solar energy intermediate heat collector.
- the absorption chiller is a lithium bromide refrigerator.
- Solar vacuum tube collector is used as the primary heating device, when the solar radiation intensity is sufficient (>600w/m 2 ) can be prepared at 150 °C
- the above hot water or 0.2 MPa steam can be directly pumped to the low pressure heater and further supplemented as boiler feed water;
- the purpose of the solar secondary heater is to further increase the water temperature, not only to save energy, but also to ensure the utilization of solar energy when the solar radiation intensity is low; when the solar radiation intensity is sufficient, the solar secondary heater can heat the water temperature to Above 150 °C, directly feeding high-pressure heaters as a supplement to boiler feed water;
- the core equipment of the system is a molecular sieve regenerator bed, which is an innovative device of the invention. It adopts molecular sieve adsorption heat storage and has a large heat storage volume. It is a key device for ensuring continuous heating of the system, and its first function can be utilized.
- the solar energy secondary heating high-temperature water reserves high-grade heat, and the second function is to heat the hot water discharged from the hot water storage tank to raise the water temperature and ensure the hot water supply at night or when the solar radiation energy is relatively low.
- the quality is also the guarantee of continuous heating of the system, and the device has the advantages of large temperature increase, large heat storage volume and good heat preservation performance. The advantage of low cost;
- the present invention fully utilizes the waste heat of the power plant by directly taking the exhaust condensate of the power plant as a working medium;
- the system can provide high water temperature, it can also be used as a heat source for adsorption chillers, providing multiple uses for hot water systems;
- the invention adopts the solar secondary heating to enable the hot water system to obtain higher grade thermal energy, and at the same time, the system can be continuously operated due to the use of the molecular sieve heat storage device, which is complicated with respect to the expensive operation procedure.
- the investment in the high-temperature molten salt heat storage system is much more economical, and it also has the advantages of increasing the temperature range, large heat storage volume, and good heat preservation performance. Ideal for use as an auxiliary system for power plant boiler hot water supply.
- FIG. 1 is a schematic diagram of a system according to an embodiment of the present invention.
- Figure 2 is a schematic view showing the structure of the molecular sieve regenerator bed of Figure 1;
- Figure 3 is a cross-sectional view taken along line A-A of Figure 1;
- Figure 4 is a cross-sectional view of the heat storage tube of Figures 2 and 3;
- Figure 5 is a working principle diagram of the system of Figure 1;
- a solar water-heat-assisted heat storage device of the present invention includes at least one molecular sieve heat storage bed.
- the hot water storage tank 17; the molecular sieve heat storage bed 18 comprises a cylindrical heat storage bed outer casing 18.1, and the heat storage bed outer casing 18.1 is provided with a plurality of heat storage tubes 18.5, the heat storage tubes 18.5 It consists of a meshed metal tube 18.5.1 and an adsorbent layer 18.5.2 attached to the surface of the meshed metal tube 18.5.1 for heat storage, the adsorbent layer 18.5.2
- the adsorbent material in the middle is a molecular sieve adsorbent material capable of pairing with water as a heat storage working fluid pair;
- the heat storage bed shell 18.1 is provided with a sealing valve 18.2 at both ends and respectively passed through the air duct and the air preheater 23
- the gas inlet and outlet are connected; the end of one end of the regenerator bed 18.1 is provided with a water inlet, the water inlet and
- the heat storage device Since the invention is only provided to the boiler The hot water of 150 ⁇ 250°C is used for the purpose of saving boiler fuel, instead of providing 600 ⁇ 800°C heat source for direct power generation. Therefore, the heat storage device does not need to use a high-temperature molten salt heat storage system which is complicated by a large operation procedure, and adopts a kind of high-temperature molten salt heat storage system. A simple low temperature heat storage device is all right. The above heat storage device can fully meet the demand.
- the regenerator bed casing 18.1 in this embodiment can be clamped by a double steel plate of about 100 mm.
- the polyurethane insulation layer is formed, and the hot water storage tank 17 can be made of steel plus insulation layer or reinforced concrete structure and insulation layer.
- the adsorbent layer 18.5.2 in this embodiment is preferably composed of a mixture of an adsorbent material and a metal powder having good thermal conductivity.
- Adsorbent layer The adsorbent material in 18.5.2 is preferably silica gel, natural zeolite, artificial zeolite or composite adsorbent.
- the adsorbent layer 18.5.2 in this embodiment is most preferably an artificial zeolite 13X.
- the molecular sieve is mixed with a metal powder having good thermal conductivity and adhered to the surface of the meshed metal tube 18.5.1 by an adhesive.
- Select artificial zeolite 13X As a heat storage material, molecular sieves are considered to be low in cost and highly adsorbable. Under normal circumstances, the storage density of artificial zeolite 13X molecular sieve can reach 640kj/kg. It can be regenerated and reused, and the heat storage is stable, and no heat loss is extracted.
- a layer of a very thin conductive polymer is coated on the surface of the adsorbent particles, and a small amount of thermally conductive polymer is used to form a continuous heat conducting network on the surface of the adsorbent particles to improve the thermal conductivity of the particles.
- the purpose of reducing the internal heat transfer temperature gradient of the adsorbent is to enhance the heat transfer performance of the adsorbent. This method has proved by many practices that this method has the least influence on reducing the adsorption capacity of the adsorbent.
- the project initially adopts conductive polyaniline as the heat conductive working medium, which can directly chemically oxidize and polymerize on the surface of the zeolite particles to form a small amount of heat conductive polyaniline to form a uniform continuous heat conduction network, thereby significantly improving the thermal conductivity of the adsorbent.
- conductive polyaniline as the heat conductive working medium, which can directly chemically oxidize and polymerize on the surface of the zeolite particles to form a small amount of heat conductive polyaniline to form a uniform continuous heat conduction network, thereby significantly improving the thermal conductivity of the adsorbent.
- some adhesive agent should be added to the adsorbent to bond the zeolite into a whole.
- the working principle of the above-mentioned heat storage device is that when the mechanism stores heat, the hot water heated by the solar energy is sent to the air preheater 23
- the heated air temperature is generally 120 ⁇ 150 °C, and the heated air is sent to the molecular sieve regenerator bed 18, and the hot air is forced through the regenerative tube 18.5 and the adsorbent layer 18.5.2
- Fully heat exchange the artificial zeolite molecular sieve is heated, the water evaporates, and the heat absorption and heat storage is realized, and the high-humidity air can be discharged.
- the sealing valve at both ends is closed 18.2; when the mechanism releases heat, the hot water storage tank is 17
- the water of 60 ⁇ 70 °C is sent to the molecular sieve regenerator bed 18, and the water is heated in contact with the artificial zeolite of the cognac, and the water temperature is increased.
- the molecular sieve heat storage bed 18 It is not suitable to be too large, and 4 ⁇ 8 molecular sieve regenerator beds 18 can be arranged in parallel to ensure normal and stable operation of the system.
- a solar water heating system for a power plant boiler of the present invention includes a steam turbine in sequence. a condenser connected to the air outlet 4, a condensate pump 5, a shaft seal heater 14, a tertiary low pressure heater 8 , 9 , 10 , a deaerator 6 and a water removal tank 7 , and a secondary high pressure heater 12 , 13.
- the last stage high pressure heater 13 is connected to the water inlet of the boiler 1, and further comprises a solar heat medium collector, a solar secondary heater and a solar hot water auxiliary heat storage device;
- the solar energy intermediate heat collector in this embodiment selects a flat solar collector 15 , and its water inlet and shaft seal heater 14 The water outlet is connected, and the water outlet is connected to the water inlet of the last stage low pressure heater 10;
- the solar secondary heater in this embodiment selects a CPC collector 16 for its water inlet and flat solar collector 15
- the water outlet is connected, and the water outlet is respectively connected with the water inlet of the last stage low-pressure heater 10, the water inlet of the first-stage high-pressure heater 12, and the water inlet of the air preheater 23, and the air preheater 23
- the water outlet is connected to the water inlet of the flat solar collector 15 described above;
- the water outlet of the molecular sieve regenerator bed 18 of the solar hot water auxiliary heat storage device and the last stage low pressure heater 10 The inlet of the water inlet is connected; in order to adapt to the nighttime use, the design volume of the hot water storage tank 17 may be 8 to 10 hours of capacity of the boiler 1;
- valves and pumps 23 are provided on each water pipe, and valves and fans are provided on each of the ventilation pipes. .
- the working principle of the above-mentioned heat storage mechanism is that when the heat storage mechanism is used, the hot water heated by the solar energy is sent to the air preheater 23
- the heated air temperature is generally 120 ⁇ 150 °C, and the heated air is sent to the molecular sieve regenerator bed 18, and the hot air is forced through the regenerative tube 18.5 and the adsorbent layer 18.5.2
- Fully heat exchange the artificial zeolite molecular sieve is heated, the water evaporates, and the heat absorption and heat storage is realized, and the high-humidity air can be discharged.
- the sealing valve at both ends is closed 18.2; when the mechanism releases heat, the hot water storage tank is 17
- the water of 60 ⁇ 70 °C is sent to the molecular sieve regenerator bed 18, and the water is heated in contact with the artificial zeolite of the cognac, and the water temperature is increased.
- the molecular sieve heat storage bed 18 It is not suitable to be too large, and 4 ⁇ 8 molecular sieve regenerator beds 18 can be arranged in parallel to ensure normal and stable operation of the system.
- Fig. 1 and Fig. 5 condensed water is taken from the shaft seal heater 14 of the power plant as the working medium of the hot water supply system, and sent to the flat solar collector 15 by the water pump 23, during the daytime.
- the solar radiation intensity is sufficient (> 600w/m 2 )
- the solar energy is absorbed, and the water temperature can reach about 150 °C.
- These heated waters are three-way output:
- the heated effluent has four uses: 3.1) When CPC When the water temperature of the outlet of the collector 16 is higher than 250 °C, the effluent can be directly sent to the high-pressure heater 12, 13 and heated to the boiler 1; 3.2 The hot water can be sent to the absorption chiller as a heat source for refrigeration, and the hot water at the outlet end is sent back to the flat solar collector 15 for use in the water inlet; 3.3) When the solar radiation intensity is weak, the CPC collector 16 The outlet water temperature may be lower than 200 °C.
- the effluent water is sent to the low-pressure heater 10, and then to the deaerator 6, and the dehydrated water is sent to the boiler 1 through the high-pressure heaters 12 and 13 in turn; 3.4)
- the hot water is sent to the air preheater 23 to heat the molecular sieve regenerator bed 18.
- the low temperature and high humidity air is used, and the adsorbent layer is used. 18.5.2 Energy storage, the effluent of the air preheater 23 returns to the flat solar collector. 15 .
- the core of the invention consists of a solar hot water supply system composed of a solar energy intermediate temperature collector, a solar secondary heater, an air heater, a hot water tank, a molecular sieve regenerator bed 18, an absorption refrigeration unit, and a power plant boiler feed water system interface. It can continuously supply 60 ⁇ 250°C hot water to the power plant, which can fully utilize solar energy as a supplementary fuel for the power plant boiler, and the normal operation of the boiler is not affected by solar instability and intermittent, which significantly reduces the power plant cost.
- the core of the system is the molecular sieve regenerator bed 18, which ensures that the system continuously delivers high grade heat. Therefore, the scope of protection is not limited to the above embodiment.
- the specific form is convenient for the ventilation of the both ends of the molecular sieve regenerator bed 18 and the water passing through the side, and meets the heat storage requirement;
- the artificial adsorbent of the adsorbent material in the adsorbent layer 18.5.2 is a preferred embodiment of the invention, using activated carbon
- the heat storage material such as silica gel can also realize the technical solution of the present invention;
- the solar secondary heater can adopt not only the CPC collector 16 but also other medium and high temperature collectors such as a trough solar collector. It is intended that the present invention cover the modifications and variations of the invention, and the scope of the invention.
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Abstract
Description
Claims (10)
- 一种太阳能热水辅助蓄热装置,其特征在于:所述蓄热装置包括至少一台分子筛蓄热床(18)和蓄热水箱(17);所述分子筛蓄热床(18 )包括筒状的蓄热床外壳(18.1),蓄热床外壳(18.1)内设有若干蓄热管(18.5),所述蓄热管(18.5)由带网孔金属管(18.5.1)和附着在带网孔金属管(18.5.1)表面的吸附剂层(18.5.2)构成,用于蓄热,所述吸附剂层(18.5.2)中的吸附材料为能够与水作为蓄热工质对配对的分子筛吸附材料;蓄热床外壳(18.1)的两端均设有密封阀门(18.2)并分别通过通气管道与空气预热器(23)的气体进、出口连通;蓄热床外壳(18.1)的一端侧面设有入水口,所述入水口与所述蓄热水箱(17)的出水口连通,另一端侧面设有出水口,用于将热水输至后续设备。
- 根据权利要求1所述的太阳能热水辅助蓄热装置,其特征在于:所述吸附剂层(18.5.2)由吸附材料和导热性好的金属粉末混合构成或采用化学聚合吸附材料。
- 根据权利要求1或2所述的太阳能热水辅助蓄热装置,其特征在于:所述吸附剂层(18.5.2)中的吸附材料采用硅胶、天然沸石、人工沸石、氯化钙或复合吸附材料。
- 根据权利要求3所述的太阳能热水辅助蓄热装置,其特征在于:所述吸附剂层(18.5.2)中的吸附材料为人工沸石 13X 分子筛。
- 根据权利要求1或2所述的太阳能热水辅助蓄热装置,其特征在于:所述蓄热床外壳(18.1)由双层钢板夹聚氨酯保温层构成。
- 一种包含权利要求1~5所述的太阳能热水辅助蓄热装置的电厂锅炉太阳能热水辅助供给系统,包括依次与汽轮机(2)出气口连接的冷凝器(4)、凝结水泵(5)、轴封加热器(14)、若干级低压加热器、除氧器(6)和若干级高压加热器,最后一级高压加热器与锅炉(1)的入水口连通,所述各通水管道上设有阀门和水泵(21),各通气管道上设有阀门和风机(22),其特征在于:还包括太阳能中温集热器、太阳能二级加热器和太阳能热水辅助蓄热装置;所述太阳能中温集热器的入水口与轴封加热器(14)的出水口连通,太阳能中温集热器的出水口与最后一级低压加热器的入水口连通;所述太阳能二级加热器的入水口与太阳能中温集热器的出水口连通,太阳能二级加热器的出水口分别与最后一级低压加热器的入水口、第一级高压加热器的入水口和空气预热器(23)的入水口连通,空气预热器(23)的出水口与所述太阳能中温集热器的入水口连通;所述太阳能热水辅助蓄热装置的分子筛蓄热床(18)的出水口与最后一级低压加热器的入水口连通。
- 根据权利要求6所述的电厂锅炉太阳能热水辅助供给系统,其特征在于:所述太阳能中温集热器为集热温度在 100 ℃以上的真空管太阳能集热器(15 )。
- 根据权利要求6所述的电厂锅炉太阳能热水辅助供给系统,其特征在于:所述太阳能二级加热器为槽式太阳能集热器或者CPC 集热器(16)。
- 根据权利要求6至8中任一权利要求所述的电厂锅炉太阳能热水辅助供给系统,其特征在于:所述太阳能二级加热器的出水口还连有吸收式制冷机,吸收式制冷机的出水口与所述太阳能中温集热器的入水口连通。
- 根据权利要求9所述的电厂锅炉太阳能热水辅助供给系统,其特征在于:所述吸收式制冷机为溴化锂制冷机(20)。
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