CN110218598B - Solar energy-fused salt heat storage coupling baking device - Google Patents
Solar energy-fused salt heat storage coupling baking device Download PDFInfo
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- CN110218598B CN110218598B CN201910501653.0A CN201910501653A CN110218598B CN 110218598 B CN110218598 B CN 110218598B CN 201910501653 A CN201910501653 A CN 201910501653A CN 110218598 B CN110218598 B CN 110218598B
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/02—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with stationary charge
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
- C10B47/02—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with stationary charge
- C10B47/14—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion with stationary charge with the aid of hot liquids, e.g. molten salts
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
- C10B53/02—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form of cellulose-containing material
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- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B57/00—Other carbonising or coking processes; Features of destructive distillation processes in general
- C10B57/08—Non-mechanical pretreatment of the charge, e.g. desulfurization
- C10B57/10—Drying
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- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L5/00—Solid fuels
- C10L5/40—Solid fuels essentially based on materials of non-mineral origin
- C10L5/44—Solid fuels essentially based on materials of non-mineral origin on vegetable substances
- C10L5/447—Carbonized vegetable substances, e.g. charcoal, or produced by hydrothermal carbonization of biomass
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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
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/10—Biofuels, e.g. bio-diesel
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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
- Y02E50/00—Technologies for the production of fuel of non-fossil origin
- Y02E50/30—Fuel from waste, e.g. synthetic alcohol or diesel
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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
- Y02P20/133—Renewable energy sources, e.g. sunlight
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Abstract
本发明提出一种太阳能‑熔融盐蓄热耦合烘焙装置，包括储油罐，储油罐与三通阀I连通，三通阀I与太阳能集热装置连通，三通阀I与三通阀III连通，太阳能集热装置与三通阀II连通，三通阀II与熔融盐蓄热罐连通，熔融盐蓄热罐上设有电加热装置，熔融盐蓄热罐与三通阀III连通，三通阀III与储油罐连通，三通阀II与烘焙反应器连通，烘焙反应器与干燥脱水器连通，干燥脱水器与储油罐连通。本发明的优点：使用其他的绿色能源，减少电能或者其他传统化石能源的利用；利用熔融盐蓄热，可以更大程度上的减少电能和传统化石能源的利用；利用低谷电，可以极大程度上的提高烘焙的经济性；使用两级法干燥，通过对烘焙物料的预热可进一步提高烘焙效率、降低烘焙能耗。
The present invention proposes a solar-molten salt heat storage coupled baking device, comprising an oil storage tank, the oil storage tank is communicated with a three-way valve I, the three-way valve I is communicated with the solar heat collector, and the three-way valve I is connected with a three-way valve III Connected, the solar heat collector is communicated with the three-way valve II, the three-way valve II is communicated with the molten salt heat storage tank, the molten salt heat storage tank is provided with an electric heating device, the molten salt heat storage tank is communicated with the three-way valve III, and the three The through valve III is communicated with the oil storage tank, the three-way valve II is communicated with the torrefaction reactor, the torrefaction reactor is communicated with the drying dehydrator, and the drying dehydrator is communicated with the oil storage tank. The advantages of the present invention: the use of other green energy can reduce the utilization of electric energy or other traditional fossil energy; the use of molten salt to store heat can reduce the utilization of electric energy and traditional fossil energy to a greater extent; To improve the economy of baking; using two-stage drying method, the baking efficiency can be further improved and the energy consumption of baking can be reduced by preheating the baking material.
Description
Technical Field
The invention relates to biomass baking equipment, in particular to a solar energy-molten salt heat storage coupling baking device.
Background
Biomass baking is a low-temperature (200-300 ℃) slow pyrolysis process. The method is carried out under the condition of low oxygen or no oxygen, and the main aim is to remove water and light volatile matters in the biomass so as to obtain a biomass product with low water content and high heat value similar to low-rank coal. The biomass product after baking treatment also has the advantages of easy storage and transportation, low grinding energy consumption, strong hydrophobicity and the like.
At present, most of the existing biomass baking technologies adopt direct electric heating or utilize combustion high-temperature flue gas to provide heat for the baking process. The use of traditional biomass roasting technology in industrial production causes the problems of higher overall energy consumption and excessive production cost of roasting, or introduces the use of fossil energy to cause environmental pollution and aggravate the tension of shortage of fossil fuel. In response to this situation, researchers in the field are urgently required to propose a feasible technical scheme with low energy consumption and high economical efficiency for biomass.
Disclosure of Invention
The invention provides a solar energy-fused salt heat storage coupling baking device, which solves the problems of high energy consumption and high production cost of the traditional baking technology. The invention provides a more energy-saving and environment-friendly baking system, which utilizes the good heat storage characteristic of heat conduction oil to heat the heat conduction oil and provide required energy for a baking reactor through solar energy heating and valley electricity. In order to further reduce the utilization of electric energy and traditional fossil energy, the invention provides a heat storage mode, which is characterized in that heat conduction oil flowing out of the groove type solar heat collection device is divided, one part is used for baking, and the other part is stored by molten salt. Aiming at the problem that the heat transfer oil flowing out of the baking reactor still has a large amount of waste heat, the two-stage drying method is used in the baking process, and the baking efficiency can be further improved and the baking energy consumption can be reduced by preheating the baking materials.
The technical scheme of the invention is realized as follows: the utility model provides a solar energy-fused salt heat storage coupling cures device, includes the oil storage tank, the oil storage tank communicate with three-way valve I, three-way valve I and solar heat collection device intercommunication, three-way valve I and three-way valve III intercommunication, solar heat collection device and three-way valve II intercommunication, three-way valve II and fused salt heat storage tank intercommunication are equipped with electric heater unit on the fused salt heat storage tank, fused salt heat storage tank and three-way valve III intercommunication, three-way valve III and oil storage tank intercommunication, three-way valve II and the reactor intercommunication of baking, bake reactor and dry dehydrator intercommunication, dry dehydrator and oil storage tank intercommunication.
The feed inlet of the drying dehydrator is communicated with the crushing device, and the discharge outlet of the drying dehydrator is communicated with the feed inlet of the baking reactor.
And a circulating pump is arranged between the oil storage tank and the three-way valve I, and an oil return pump is arranged between the oil storage tank and the drying dehydrator.
And a flow meter I is arranged between the oil storage tank and the three-way valve I, a flow meter II is arranged between the three-way valve I and the solar heat collection device, and a flow meter III is arranged between the fused salt heat storage tank and the three-way valve III.
And a temperature sensor I is arranged between the solar heat collection device and the three-way valve II, a temperature sensor II is arranged between the baking reactor and the drying dehydrator, and a temperature sensor III is arranged in the fused salt heat storage tank.
A valve I is arranged between the baking reactor and the drying dehydrator, and a valve II is arranged between the oil storage tank and the drying dehydrator.
The solar heat collection device comprises a groove type solar heat collector and an automatic tracker, and the automatic tracker controls the groove type solar heat collector.
The groove type solar heat collector comprises a parabolic cylindrical condenser and a vacuum heat collecting tube, wherein the vacuum heat collecting tube is fixed at the focus of the parabolic cylindrical condenser.
The baking reactor comprises a shell, an interlayer is arranged in the shell, and an oil guide coil is arranged in the interlayer.
The spiral shaft is arranged in a countercurrent mode with the oil guide coil.
The biomass raw material is crushed in a crushing device according to the required specification and size, the processed biomass is dried and dehydrated in a drying dehydrator, and the dried and dehydrated biomass is sent into a baking reactor for baking. The heat conducting oil in the oil storage tank is sent into the groove type solar heat collector through the circulating pump, and the circulating pump provides power for the flowing of the heat conducting oil in the whole system. In the process, the heat conduction oil passes through the valve and the flowmeter, so that the heat conduction oil entering the groove type solar heat collector can reach the temperature required by baking, and the safety of the process can be ensured. The heat conducting oil from the groove type solar heat collector enters the coil pipe in the interlayer of the baking reactor through the conveying pipe and the valve. Countercurrent heat exchange is adopted in the baking reactor to improve the heat exchange efficiency, and the moving direction of the biomass raw material is opposite to the flowing direction of the heat conduction oil. The invention adopts an energy gradient utilization mode to provide required heat for dehydrating the raw materials, and heat conducting oil from the baking reactor enters the drying dehydrator through the conveying pipe and the valve to dry and dehydrate the biomass raw materials. The heat conducting oil from the drying dehydrator returns to the oil storage tank through the oil return pump.
The solar heat collector adopts a trough type heat collector which consists of a straight-through type vacuum heat collecting tube and a parabolic cylindrical condenser, wherein the surface of the heat collecting tube is provided with a high-temperature selective absorption coating, and the parabolic cylindrical condenser can focus direct solar light and focus the solar light on the vacuum heat collecting tube to heat conduction oil in the vacuum heat collecting tube. The high-temperature selective absorption coating can enhance the absorption of the vacuum heat collecting tube to solar radiation, reduce the heat radiation loss of the vacuum heat collecting tube to the environment and improve the heat collecting efficiency. The solar heat collector has the characteristics of high heat energy absorption density, good operation efficiency and the like. Meanwhile, an automatic tracking system is additionally arranged on the heat collector, so that the condensing lens can automatically adjust along with the incident angle of the sun, and the maximum incident radiation quantity is ensured.
In consideration of time, weather and other reasons, the groove type solar heat collection device cannot heat the heat conduction oil to the required temperature, so that a heat storage system is additionally arranged. The heat conducting oil flowing out of the solar heat collector is divided into two parts through the control of a three-way valve. One part is directly used for the baking reaction to provide heat for the baking reaction, and the other part flows into the molten salt heat storage tank to store and collect heat energy and then flows back into the oil storage tank. When the sunshine condition is good in the daytime, the solar energy can heat the heat conduction oil, one part of the heat conduction oil is used for baking, and the other part of the heat conduction oil is used for heating the molten salt. The heat stored in the molten salt can be released to the heat conducting oil for baking at night or in rainy and snowy days, and an electric heating device is required to be arranged in the molten salt heat storage tank in the process of heat loss. When the rain and snow day continues, the low valley electricity is used for directly heating the baking reactor at night, the low valley electricity is used for electrically heating the molten salt for heat storage, and the molten salt is used for heating the heat conducting oil to provide heat for the baking reaction in the daytime.
The present invention uses step energy utilization. High-temperature heat conducting oil flowing out of the solar heat collector enters the baking reactor after reaching the baking temperature to provide heat for biomass baking, which is the first-level utilization of energy. The low-temperature heat conducting oil from the baking reactor is reduced in temperature, but still has residual heat, and is introduced into the drying reactor to provide heat for drying dehydration and preheating of the biomass raw material. The cascade utilization of energy fully utilizes the energy with different tastes, and meets the economic requirement in industrial production.
Because the heat conduction oil has low corrosivity and low toxicity, a safety valve is additionally arranged at the joint of each device, and the phenomenon that the heat conduction oil flows out due to the fact that a certain part is damaged is avoided.
The baking reactor is of a jacketed double-layer structure, and a coil is arranged in the interlayer. The heat conducting oil enters the coil pipe in the interlayer of the baking reactor to exchange heat in the coil pipe, so that energy is provided for the whole baking reaction. The coil pipe can improve the heat exchange efficiency, ensure that heat conduction oil is not in direct contact with the baking reactor, and avoid the heat conduction oil from corroding the baking reactor.
In the drying and dehydrating process, the temperature of the entering heat transfer oil is controlled to be 100-150 ℃. After the biomass raw material is dried and dehydrated, the residual moisture in the biomass is controlled to be less than 5 percent. The temperature required by baking is 200-300 ℃, the temperature of heat conduction oil entering baking needs to reach the temperature, but the temperature of the heat conduction oil is 20-100 ℃ higher than the actual baking temperature in consideration of energy loss in actual operation.
The invention has the advantages that: other green energy sources are used, so that the utilization of electric energy or other traditional fossil energy sources is reduced; an energy storage system is added in the baking process, and the molten salt is used for storing heat, so that the utilization of electric energy and other traditional fossil energy sources can be reduced to a greater extent; the low-ebb electricity is utilized, so that the baking economy can be greatly improved; the two-stage method is used for drying, and the baking efficiency can be further improved and the baking energy consumption can be reduced by preheating the baking materials.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic view of the structure of the present invention.
In the figure: 1-an oil storage tank; 2-a flow meter I; 3-a circulating pump; 4-three-way valve I; 5-flow meter II; 6-a solar heat collection device; 7-temperature sensor I; 8-three-way valve II; 9-a torrefaction reactor; 10-valve I; 11-temperature sensor II; 12-a dry dehydrator; 13-valve II; 14-scavenge pump; 15-a crushing device; 16-an electric heating device; 17-molten salt heat storage tank; 18-flow meter III; 19-three-way valve III.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without inventive effort based on the embodiments of the present invention, are within the scope of the present invention.
As shown in figure 1, the solar energy-molten salt heat storage coupling roasting device comprises an oil storage tank 1, wherein the oil storage tank 1 is communicated with a flow meter I2, a flow meter I2 is communicated with a circulating pump 3, the circulating pump 3 is communicated with a three-way valve I4, a three-way valve I4 is communicated with a flow meter II5, a flow meter II5 is communicated with a solar heat collection device 6, a three-way valve I4 is communicated with a three-way valve III19, the solar heat collection device 6 is communicated with a temperature sensor I7, a temperature sensor I7 is communicated with a three-way valve II8, a three-way valve II8 is communicated with a molten salt heat storage tank 17, an electric heating device 16 is arranged on the molten salt heat storage tank 17, the molten salt heat storage tank 17 is communicated with the flow meter III18, the flow meter III18 is communicated with the three-way valve III19, the three-way valve III19 is communicated with the oil storage tank 1, the three-way valve II8 is communicated with a roasting reactor 9, the roasting reactor 9 is communicated with the valve I10, the valve I10 is communicated with a temperature sensor II11, and a temperature sensor II11 is communicated with a drying dehydrator 12, the dry dehydrator 12 is communicated with a valve II13, a valve II13 is communicated with a return oil pump 14, and the return oil pump 14 is communicated with the oil storage tank 1. The feed inlet of the drying dehydrator 12 is communicated with the crushing device 15, and the discharge outlet of the drying dehydrator 12 is communicated with the feed inlet of the baking reactor 9.
The baking method of the device comprises the following steps:
(1) pretreatment of biomass raw materials: crushing and screening the biomass in a crushing device according to the required size.
(2) And (3) drying and dehydrating the pretreated biomass in a drying dehydrator in a convection mode under the drive of a screw. The biomass raw material enters through the feed inlet, the low-temperature heat conducting oil and the biomass raw material carry out reverse convection heat exchange in the drying dehydrator, and the heat conducting oil returns to the oil storage tank along a pipeline after heat exchange. The temperature in the drying dehydrator is controlled to be 150-200 ℃ at this stage. The drying time is 10-30 minutes, and the moisture content of the obtained biomass is lower than 5%. In consideration of energy loss in the heat exchange process, the temperature of heat conducting oil entering the drying dehydrator is set to be 150-200 ℃.
(3) And conveying the dried and dehydrated organisms to a baking reactor, feeding the organisms into a cavity of the baking reactor through a feeding port, wherein the baking reactor is of a jacket type double-layer structure, the baking temperature is 200-300 ℃, heat conduction oil transfers heat into the cavity through the wall of the inner cavity, and the biomass reacts in the cavity for 10-30 minutes. Considering the energy loss in the heat exchange process, the temperature of the heat conduction oil is 20-100 ℃ higher than the actual baking temperature.
The solar collector comprises a solar collector and an automatic tracking system. The solar heat collector is a groove type solar heat collector and comprises a straight-through type vacuum heat collecting tube and a parabolic cylindrical surface condenser, the surface of the heat absorbing tube is provided with a high-temperature selective absorbing coating, and the selective absorbing coating can enhance the absorption of the vacuum heat collecting tube on solar radiation and reduce the heat radiation loss of the vacuum heat collecting tube to the environment. The heat conducting oil medium flows in from one end of the heat absorbing pipe, is heated by solar radiation energy and then flows out from the other end of the heat absorbing pipe. The automatic tracking system can ensure that the solar incident angle is maximum in one day, and maximum radiant heat is obtained. The heat conduction oil is a heat conduction medium in the whole solar heat collection device, and the heat conduction oil circulating system can ensure the efficient and stable work of the heat conduction oil.
In consideration of the fact that during actual roasting, it may be necessary to roast in rainy and snowy weather and at night, a heat storage system and an electric heating device are provided in the entire system. The high-temperature heat conducting oil flowing out of the solar heat collector is divided into two parts of high-temperature heat conducting oil through the three-way valve, and one part of the high-temperature heat conducting oil directly enters the interlayer of the baking reactor to provide heat for the baking reaction. The other part of the heat energy enters the molten salt heat storage tank, and the heat energy in the heat conducting oil is stored in the molten salt and then flows back to the oil storage tank. The electric heating device is arranged on the fused salt heat storage tank, so that the condition that the temperature of the heat conduction oil cannot meet the baking requirement due to heat loss during baking is avoided.
According to the reasons of weather, season, baking time and the like, the system operation can be divided into the following three cases:
(1) when the sunshine condition is good in the daytime, the solar energy can directly heat the heat conduction oil. The specific implementation scheme is that at the moment, the heat conduction oil flowing out of the oil storage tank 1 in the whole system flows out of the oil outlet and enters the flow meter I2, and flows out of the flow meter I2 and enters the circulating pump 3, and the circulating pump provides power for the flow of the oil in the whole system. The circulation pump 3 is in turn connected to a three-way valve I4. At this time, the connection between the three-way valve I4 and the three-way valve III19 is closed, and the connection between the three-way valve I4 and the flow meter II5 is opened. The three-way valve 4 determines the flow direction of the heat conducting oil and ensures the safety of the system. The flow meter II5 is connected to ensure that the flow rate provided by the circulation pump 3 is in line with the system requirements. The heat conducting oil enters the solar heat collecting device, and the high-temperature heat conducting oil from the solar heat collecting device passes through the temperature sensor I7 and the three-way valve II 8. The temperature sensor I7 ensures that the temperature of the heat-conducting oil in the whole system can meet the baking requirement, the three-way valve II8 can ensure the safety of the system and can also shunt the heat-conducting oil, one part is used for baking, and the other part is used for heating the molten salt for heat storage. The heat conducting oil flowing through the molten salt heat storage tank 17 finally returns to the oil storage tank 1 through the flow meter III18 and the three-way valve III 19. The temperature of the heat conducting oil flowing out of the three-way valve II8 and entering the baking reactor 9 is 20-100 ℃ higher than the actual baking temperature. The heat conducting oil flows out from the outlet of the roasting reactor 9, passes through a valve I10 and a temperature sensor II11, and enters the dry dehydrator 12. Valve I10 ensures system safety. The temperature sensor II11 ensures that the temperature of the heat transfer oil entering the dry dehydrator is satisfactory. The dry dehydrator 12 pretreats the biomass feedstock as it is baked. Finally, the oil from the dry dehydrator 12 flows through a valve II13 and a return pump 14. The valve 13 ensures the safety of the system, and the oil return pump 14 sends the heat conduction oil into the oil storage tank 1 to complete the circulation of the heat conduction oil in the whole system.
(2) At night or in rainy and snowy days, the heat stored in the molten salt can be utilized to be released to the heat conducting oil for baking. In view of heat loss, the heat transfer oil does not reach the temperature required for baking, so that it is necessary to heat the molten salt using an electric heating device. The specific implementation scheme is that the heat conduction oil flowing out of the oil storage tank 1 passes through the flow meter I2 and the circulating pump 3 and enters the three-way valve I4, the connecting end of the three-way valve I4 and the flow meter II5 is closed, the connecting end of the three-way valve III19 and the oil storage tank 1 is closed, at the moment, the heat conduction oil passes through the three-way valve I4 and the three-way valve II19 and enters the flow meter III18, the heat conduction oil flowing out of the flow meter III18 enters the molten salt heat storage tank 17, the electric heating device 16 is used for assisting in heating the molten salt, the heat conduction oil and the molten salt exchange heat in the molten salt heat storage tank 17 to obtain high-temperature heat conduction oil, a temperature sensor is arranged in the molten salt heat storage tank 17, and the temperature of the heat conduction oil can meet the baking requirement. The connection of three-way valve II8 to temperature sensor I7 was closed and the connection to torrefaction reactor 9 was opened. The high-temperature heat conducting oil enters the roasting reactor 9 through a three-way valve II 8. The temperature of the heat conducting oil entering the baking reactor 9 is 20-100 ℃ higher than the actual baking temperature. The heat conducting oil flows out from the outlet of the roasting reactor 9, passes through a valve I10 and a temperature sensor II11, and enters the dry dehydrator 12. Valve I10 ensures system safety. The temperature sensor 11 ensures that the temperature in the dry dehydrator is satisfactory. The dry dehydrator 12 pretreats the biomass feedstock as it is baked. Finally, the oil from the dry dehydrator 12 flows through a valve II13 and a return pump 14. The valve II13 ensures the safety of the system, the oil return pump 14 sends the heat conducting oil into the oil storage tank 1, and the circulation of the heat conducting oil in the whole system is completed.
(3) In the rainy and snowy days, the conditions are divided into night and day. The torrefaction reactor 9 is directly heated at night using valley electricity to provide heat for the torrefaction reaction, and the molten salt in the molten salt heat storage tank 17 is heated using valley electricity to store heat. The heat transfer oil is heated by molten salt in the daytime to provide heat for the torrefaction reactor 9. The embodiment is the same as in the case (2).
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (6)
1. A solar energy-molten salt heat storage coupling baking device comprises an oil storage tank (1), and is characterized in that: the solar energy heat collection system is characterized in that the oil storage tank (1) is communicated with a three-way valve I (4), the three-way valve I (4) is communicated with a solar energy heat collection device (6), the three-way valve I (4) is communicated with a three-way valve III (19), the solar energy heat collection device (6) is communicated with a three-way valve II (8), the three-way valve II (8) is communicated with a molten salt heat storage tank (17), an electric heating device (16) is arranged on the molten salt heat storage tank (17), the molten salt heat storage tank (17) is communicated with the three-way valve III (19), the three-way valve III (19) is communicated with the oil storage tank (1), the three-way valve II (8) is communicated with a baking reactor (9), the baking reactor (9) is communicated with a drying dehydrator (12), and the drying dehydrator (12) is communicated with the oil storage tank (1);
the solar heat collection device (6) comprises a groove type solar heat collector and an automatic tracker, and the automatic tracker controls the groove type solar heat collector; the groove type solar heat collector comprises a parabolic cylindrical condenser and a vacuum heat collecting tube, and the vacuum heat collecting tube is fixed at the focus of the parabolic cylindrical condenser;
the baking reactor (9) comprises a shell, an interlayer is arranged in the shell, and an oil guide coil is arranged in the interlayer; the spiral shaft in the baking reactor (9) is arranged in a countercurrent mode with the oil guide coil.
2. The solar-molten salt thermal storage coupled torrefaction apparatus according to claim 1, wherein: the feed inlet of the drying dehydrator (12) is communicated with the crushing device (15), and the discharge outlet of the drying dehydrator (12) is communicated with the feed inlet of the baking reactor (9).
3. The solar-molten salt thermal storage coupled torrefaction apparatus according to claim 1, wherein: the oil storage tank (1) and the three-way valve I (4) are provided with a circulating pump (3) therebetween, and an oil return pump (14) is arranged between the oil storage tank (1) and the drying dehydrator (12).
4. The solar-molten salt thermal storage coupled torrefaction apparatus according to claim 1, wherein: a flowmeter I (2) is arranged between the oil storage tank (1) and the three-way valve I (4), a flowmeter II (5) is arranged between the three-way valve I (4) and the solar heat collection device (6), and a flowmeter III (18) is arranged between the molten salt heat storage tank (17) and the three-way valve III (19).
5. The solar-molten salt thermal storage coupled torrefaction apparatus according to claim 1, wherein: a temperature sensor I (7) is arranged between the solar heat collection device (6) and the three-way valve II (8), a temperature sensor II (11) is arranged between the baking reactor (9) and the drying dehydrator (12), and a temperature sensor III is arranged in the fused salt heat storage tank (17).
6. The solar-molten salt thermal storage coupled torrefaction apparatus according to claim 1, wherein: a valve I (10) is arranged between the baking reactor (9) and the dry dehydrator (12), and a valve II (13) is arranged between the oil storage tank (1) and the dry dehydrator (12).
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| CN110895056A (en) * | 2019-12-02 | 2020-03-20 | 青海大学 | A method and device for recycling carbon fiber using solar energy |
| CN113462421B (en) * | 2021-07-30 | 2023-03-28 | 重庆大学 | Pyrolysis method for heating medical waste or waste plastic by molten salt |
| CN115433597A (en) * | 2022-08-02 | 2022-12-06 | 上海发电设备成套设计研究院有限责任公司 | Traditional Chinese medicine residue fuel treatment device and treatment method |
| CN115820284B (en) * | 2022-11-18 | 2024-10-25 | 重庆大学 | Device and method for pyrolyzing mixed hydrocarbon fuel with mobile molten salt energy storage |
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