JP2016211797A - Heat storage system and dry system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the utilization efficiency of heat stored in a heat storage system, which utilizes solar heat regardless of time and weather, and a dry system including the heat storage system.SOLUTION: A heat storage system includes: a light condensing heater which condenses solar light to heat a heat storage material made of a fluid; a storage tank which stores the heat storage material heated by the light condensing heater; and a delivery system which delivers the heat storage material from the storage tank to a heat receiving part.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a heat storage system and a drying system.

  Conventionally, solid fuels such as lignite, biomass, and palm residue that contain a lot of moisture have been dried by sun drying or the like because they are poor in ignitability and combustibility due to the influence of contained moisture. However, the sun drying requires a wide space for placing the fuel and it is difficult to control the temperature of the fuel during drying. For this reason, in addition to heating by solar radiation, contact with air causes oxidation and deterioration, and heat generation from oxidation is added to the heat of solar radiation, which may lead to abnormal temperature rise and spontaneous ignition.

  On the other hand, it is conceivable to artificially create hot air and dry the fuel using this hot air. However, it is necessary to consume a large amount of fuel to generate such hot air, and a large amount of carbon dioxide. Discharge. For this reason, for example, by applying the gasification facility shown in Patent Document 1 and heating the fuel with heat obtained by collecting sunlight, it is possible to perform drying without consuming the fuel. .

JP 2001-123183 A JP 2013-23977 A

  However, the method of drying fuel using sunlight is based on the premise that there is solar radiation. In the case of nighttime or cloudy weather, the fuel cannot be dried. For this reason, it is desired to be able to dry an object to be dried such as fuel without being influenced by time and weather. Thus, for example, as shown in Patent Document 2, it is also conceivable to use solar heat at night or the like by storing solar heat in the heat storage body and flowing wind along the heat storage body. However, the heat stored in the heat storage body must be once transferred to a gas such as air and transported. For this reason, the method shown in Patent Document 2 has poor heat transport efficiency and is not suitable for a system for drying a large amount of objects to be dried.

  The present invention has been made in view of the above-described problems, and in a heat storage system that makes it possible to use solar heat without being influenced by time or weather, and a drying system including the same, increase the utilization efficiency of the stored heat. With the goal.

  The present invention adopts the following configuration as means for solving the above-described problems.

  In a heat storage system, the first invention is a condensing heater that condenses sunlight and heats a heat storage material made of fluid, a storage tank that stores the heat storage material heated by the condensing heater, and the storage tank A configuration is adopted in which the heat storage material is provided with a delivery device that sends the heat storage material to the heat receiving portion.

  According to a second invention, in the first invention, a configuration is provided in which transporting means for transporting the heat storage material that has passed through the heat receiving portion to the condensing heater is employed.

  3rd invention employ | adopts a structure provided with the cooling part which cools the said thermal storage material which has been arrange | positioned between the said heat receiving part and the said conveyance means and passed the said heat receiving part in the said 2nd invention.

  According to a fourth invention, in the second or third invention, the second invention is provided separately from the storage tank, wherein the heat storage material is temporarily stored and the stored heat storage material can be supplied to the conveying means. A configuration is adopted in which a storage tank and a guide unit that guides the heat storage material discharged from the condenser heater separately to the storage tank and the second storage tank are adopted.

  According to a fifth aspect of the present invention, in the second or third aspect of the present invention, a configuration is provided in which a distribution unit is provided that distributes the heat storage material discharged from the condenser heater to the storage tank and the heat receiving unit.

  A sixth invention adopts a configuration in any one of the first to fifth inventions, in which the storage tank is disposed below the condenser heater and the delivery device is disposed below the storage tank. .

  7th invention employ | adopts the structure that the said thermal storage material is the sand which consists of an aggregate | assembly of a granular ceramic in any one of the said 1st-6th invention.

  8th invention consists of the heat storage system which is one of said 1st-7th invention in the drying system, and the said heat receiving part, and heat-exchanges the said heat transfer medium by heat-exchanging the said heat storage material and heat transfer medium. Adopting a configuration comprising a heat transfer medium heating unit for heating, and a drying furnace for drying the object to be dried by exchanging heat between the heat transfer medium heated by the heat transfer medium heating unit and the object to be dried. To do.

  According to the present invention, solar heat can be stored in the heat storage material, so that solar heat can be used at night or in cloudy weather without being influenced by time or weather. Further, according to the present invention, the heat storage material is made of a fluid, and heat is transferred by sending out the heat storage material itself by the delivery device. For this reason, compared with the case where the heat once stored in the heat storage material is moved to another medium and transported, heat can be transported extremely efficiently. Therefore, according to the present invention, it is possible to increase the utilization efficiency of the stored heat in the heat storage system that makes it possible to use solar heat without being influenced by the time of day or the weather and the drying system including the heat storage system.

It is a flowchart which shows schematic structure of the thermal storage system in 1st Embodiment of this invention. It is a graph which shows the relationship between the time in the thermal storage system in 1st Embodiment of this invention, the temperature of a thermal storage material, etc. FIG. It is a flowchart which shows schematic structure of a drying system provided with the thermal storage system in 1st Embodiment of this invention. It is a flowchart which shows schematic structure of the thermal storage system in 2nd Embodiment of this invention. It is a flowchart which shows schematic structure of the thermal storage system in 3rd Embodiment of this invention.

  Hereinafter, an embodiment of a heat storage system and a drying system according to the present invention will be described with reference to the drawings. In the following drawings, the scale of each member is appropriately changed in order to make each member a recognizable size.

(First embodiment)
[Heat storage system]
FIG. 1 is a flowchart showing a schematic configuration of a heat storage system 10 of the present embodiment. The heat storage system 10 of the present embodiment stores heat obtained by concentrating sunlight for a certain period, and transfers heat to the heat receiving unit 100 as necessary. As shown in FIG. 1, the heat storage system 10 of this embodiment includes a condenser heater 11, a heat storage material guide unit 12 (guide unit), a heat storage material storage tank 13 (storage tank), a delivery device 14, and a heat storage system. The material cooler 15 (cooling part), the exhaust part 16, the low temperature thermal storage material storage tank 17 (2nd storage tank), the conveyance unit 18 (conveyance means), the fluidization gas supply apparatus 19, and the control apparatus 20 are provided. ing.

  The condenser heater 11 includes a cylindrical condenser mirror 11a and a heat storage material heater 11b. The cylindrical condensing mirror 11a is a substantially cylindrical mirror whose bottom is constricted, and its upper end and lower end are open. The cylindrical collector mirror 11a has an inner surface as a reflection surface, and condenses sunlight incident from the upper end side on the lower end side while reflecting the sunlight on the inner surface. The heat storage material heater 11b is a container connected to the lower end of the cylindrical condenser mirror 11a, and can store the heat storage material T therein. In this heat storage material heater 11b, the heat storage material T is heated by irradiating the heat storage material T with sunlight condensed by the cylindrical condenser mirror 11a. Further, in this heat storage material heater 11b, when a new heat storage material T is supplied from one end side (the conveyance unit 18 side in FIG. 1), the other end side (the heat storage material guide portion 12 side in FIG. 1) first. The accumulated heat storage material T is discharged. That is, such a condensing heater 11 condenses sunlight with the cylindrical condensing mirror 11a, and heats the heat storage material T with the heat storage material heater 11b by the solar heat obtained thereby.

  In the heat storage system 10 of the present embodiment, sand made of an aggregate of granular ceramics is used as the heat storage material T. Such a heat storage material T stores solar heat as sensible heat, and is transported in a stored state. Such sand has the property of acting as a fluid as is well known. That is, the fluid in the present invention is a concept including such sand. Note that liquid or gas can be used as the heat storage material T.

  The heat storage material guide unit 12 includes a guide pipe 12a and a guide plate 12b. The upper end of the guide pipe 12a is connected to the heat storage material heater 11b of the condensing heater 11, and the lower end portion is bifurcated. One of the lower ends branched into two branches is connected to the heat storage material storage tank 13, and the other is connected to the heat storage material cooler 15. The guide plate 12b is disposed inside the guide pipe 12a and above the lower end portion that is bifurcated, and is rotatable about a horizontal axis. In addition, although not shown in FIG. 1, the heat storage material guide part 12 includes a drive device that rotates the guide plate 12b. With this drive device, the guide plate 12b causes the heat storage material T falling from above to be guided toward the heat storage material storage tank 13 (at the position shown by the solid line in FIG. 1) and the heat storage material T falling from above to the heat storage material cooler 15. The posture is set to one of the postures (the postures indicated by the broken lines in FIG. 1) to be guided toward

  Such a heat storage material guide part 12 guides the heat storage material T discharged from the condenser heater 11 to either the heat storage material storage tank 13 or the heat storage material cooler 15 depending on the attitude of the guide plate 12b. In addition, the guide plate 12b can also take the intermediate position of the attitude | position which guides the thermal storage material T toward the thermal storage material storage tank 13, and the attitude | position which guides the thermal storage material T toward the thermal storage material storage tank 13. FIG. In such a case, a part of the heat storage material T dropped from above is guided to the heat storage material storage tank 13, and the rest is guided to the heat storage material cooler 15. Thus, the heat storage material guide part 12 divides and guides the heat storage material T into the heat storage material storage tank 13 and the heat storage material cooler 15.

  The heat storage material storage tank 13 is a substantially cylindrical container that narrows toward the lower end provided with an opening, and is disposed below the heat storage material guide portion 12. The heat storage material storage tank 13 has a tank wall including a heat insulating layer, and has a structure in which heat is not easily radiated from the inside to the outside. The upper end of the heat storage material storage tank 13 is connected to the guide pipe 12a of the heat storage material guide unit 12, and stores the heat storage material T supplied from the guide pipe 12a. In order to adjust the discharge timing or the like of the heat storage material T, a shutter mechanism that opens and closes the opening at the lower end of the heat storage material storage tank 13 may be provided.

  The delivery device 14 includes a delivery pipe 14a, a bleed pipe 14b, and a flow rate adjustment valve 14c. The delivery pipe 14 a is a straight pipe connected to the heat receiving unit 100 from the horizontal direction. One end of the delivery pipe 14a is connected to the heat receiving unit 100, and the other end is connected to the extraction pipe 14b. Further, the other end of the delivery pipe 14 a is connected to the lower part of the heat storage material storage tank 13, and the heat storage material T is supplied from the heat storage material storage tank 13. The extraction pipe 14b is a pipe connecting the fluidizing gas supply device 19 and the delivery pipe 14a. The fluidization gas Za is extracted from the fluidization gas supply apparatus 19, and the extracted fluidized gas Za is supplied to the delivery pipe 14a. invite. The flow rate adjusting valve 14 c is provided in the middle of the extraction pipe 14 b and adjusts the flow rate of the fluidized gas Za in the extraction pipe 14 b under the control of the control device 20. In such a delivery device 14, the heat storage material T supplied from the heat storage material storage tank 13 to the delivery pipe 14a is caused to flow by the fluidized gas Za whose flow rate is adjusted by the flow rate adjustment valve 14c. As a result, the heat storage material T is supplied to the heat receiving unit 100. At this time, the amount of the heat storage material T supplied to the heat receiving unit 100 is defined by the flow rate of the fluidized gas Za flowing through the delivery pipe 14a. For example, when the flow rate of the fluidized gas Za flowing through the delivery pipe 14a is 0, the supply amount of the heat storage material T to the heat receiving unit 100 is also 0. In such a delivery device 14, the opening degree of the flow rate adjusting valve 14 c is adjusted by the control device 20, and an amount of the heat storage material T corresponding to the flow rate of the fluidized gas Za supplied to the delivery pipe 14 a is transferred from the heat storage material storage tank 13. It sends out to the heat receiving part 100.

  The heat receiving unit 100 may be anything as long as it uses the heat stored in the heat storage material T. For example, in the drying system 1 described later, an evaporator 2 that heats and vaporizes the heat transfer medium X and a superheater 8 that superheats the vapor-like heat transfer medium X generated by the evaporator 2 include a heat receiving unit. It corresponds to 100.

  The heat storage material cooler 15 is a container connected to the heat receiving unit 100, and is disposed below the heat receiving unit 100. Further, the bottom of the heat storage material cooler 15 is connected to the supply pipe 19 a of the fluidizing gas supply device 19, and the fluidizing gas Za is supplied from the fluidizing gas supply device 19. In the heat storage material cooler 15, the heat storage material T is flowed by the fluidized gas Za supplied from the fluidized gas supply device 19, and the heat storage material T and the fluidized gas Za are subjected to heat exchange, whereby the heat storage material T is changed. It is cooled to a temperature that can be transported by the transport unit 18. The heat storage material cooler 15 is provided for the purpose of protecting the transport unit 18. When the allowable temperature of the transport unit 18 is sufficiently higher than the temperature of the heat storage material T created by the heat receiving unit 100, the heat storage material cooling is performed. The vessel 15 can be omitted.

  The exhaust part 16 includes an exhaust pipe 16a, a heat exchanger 16b, and a recovery pipe 16c. The exhaust pipe 16a is a pipe connected to the heat storage material cooler 15 and the ceiling portion of the heat receiving unit 100, and releases the fluidized gas Za discharged from the heat storage material cooler 15 and the heat receiving unit 100 to the atmosphere. The heat exchanger 16b is provided in the middle of the exhaust pipe 16a, and exchanges heat between the heat transfer medium X and the fluidized gas Za supplied from the outside. Such an exhaust part 16 heats the heat transfer medium X with the fluidized gas Za to be released into the atmosphere, thereby transferring the heat of the fluidized gas Za to the heat transfer medium X for recovery. The heat transfer medium X heated by the exhaust unit 16 is supplied to the heat receiving unit 100, for example.

  The low-temperature heat storage material storage tank 17 is a substantially cylindrical container that narrows toward the lower end where the opening is provided, and is disposed below the heat storage material cooler 15. The low temperature heat storage material storage tank 17 has an upper end connected to the heat storage material cooler 15 and stores the cooled heat storage material T supplied from the heat storage material cooler 15. Further, the heat storage material cooler 15 is also connected to the guide pipe 12a of the heat storage material guide section 12, and can also receive the heat storage material T supplied from the guide pipe 12a. For example, when the sunset time approaches and the heat storage material T cannot be sufficiently heated in the condensing heater 11, heat storage from the guide pipe 12a is performed by changing the posture of the guide plate 12b of the heat storage material guide portion 12. Material T is supplied. For this reason, the heat storage material T supplied to the heat storage material cooler 15 is a low temperature heat storage material regardless of whether the heat storage material T is from the guide pipe 12a of the heat storage material guide unit 12 or the heat reception unit 100. It cools to the temperature which the storage tank 17 accept | permits, and supplies to the low temperature thermal storage material storage tank 17. FIG.

  The lower end of the low-temperature heat storage material storage tank 17 is connected to the transport unit 18. For this reason, the low-temperature heat storage material storage tank 17 can supply the heat storage material T to the transport unit 18. That is, the low-temperature heat storage material storage tank 17 can store the low-temperature heat storage material T temporarily and supply the stored heat storage material T to the transport unit 18. In order to adjust the discharge timing of the heat storage material T and the like, a shutter mechanism that opens and closes the opening at the lower end of the low-temperature heat storage material storage tank 17 may be provided.

  The transport unit 18 includes a conveyor 18a, a drive motor 18b, and a hopper 18c. The conveyor 18a is erected upward from the lower side, conveys the heat storage material T discharged from the low-temperature heat storage material storage tank 17, and supplies it to the hopper 18c. The drive motor 18b generates power for driving the conveyor 18a and is controlled by the control device 20. The hopper 18 c temporarily stores the heat storage material T supplied from the conveyor 18 a and supplies the heat storage material T to the heat storage material heater 11 b of the condensing heater 11. Such a transport unit 18 receives the heat storage material T that has been discharged from the heat receiving unit 100 and has passed through the heat storage material cooler 15 and the low-temperature heat storage material storage tank 17, and returns it to the heat storage material heater 11 b of the condensing heater 11. Further, the transport unit 18 also returns the heat storage material T supplied directly from the heat storage material guide 12 to the low-temperature heat storage material storage tank 17 to the heat storage material heater 11 b of the condensing heater 11.

  The fluidizing gas supply device 19 includes a supply pipe 19a and a blower 19b. The supply pipe 19 a is a pipe branched into a plurality of parts, and is connected to the heat storage material heater 11 b and the heat storage material cooler 15 of the condensing heater 11, respectively. In the present embodiment, the supply pipe 19 a is also connected to the heat receiving unit 100. The supply pipe 19a is connected to the heat storage material heater 11b, the heat storage material cooler 15, and the floor of the heat receiving unit 100 from below. Further, the supply pipe 19a is further branched into a large number of connection points, thereby suppressing the uneven flow of the fluidized gas Za at the bottom of each of the heat storage material superheater 11b, the heat storage material cooler 15, and the heat receiving unit 100. However, the heat storage material T is devised so that it can be fluidized uniformly. The blower 19b pressure-feeds the fluidized gas Za supplied to the supply pipe 19a from the outside toward the heat storage material heater 11b, the heat storage material cooler 15, and the heat receiving unit 100. Such fluidizing gas Za may be any gas as long as it does not have condensability, for example, air sucked from the atmosphere. However, when a substance that can react with oxygen is used as the heat storage material T, nitrogen or other inert gas is preferable. Even when air sucked from the atmosphere is used, it is preferable to provide a dehumidifier between the air suction part and each application place in order to prevent dew condensation at a low temperature place.

  The control apparatus 20 controls the whole heat storage system 10 of this embodiment. For example, the heat storage system 10 of the present embodiment includes a first thermometer 21 that measures the outlet temperature of the heat storage material heater 11 b and a second thermometer 22 that measures the internal temperature of the heat receiving unit 100. Based on the outlet temperature of the heat storage material heater 11b, the control device 20 determines to which of the heat storage material storage tank 13 and the heat storage material cooler 15 the heat storage material T discharged from the heat storage material heater 11b is guided. The heat storage material guide 12 is controlled based on the determination result. For example, when the outlet temperature of the heat storage material heater 11b is higher than a reference value that is arbitrarily set, the heat storage material T is guided to the heat storage material storage tank 13, assuming that the heat storage material T is sufficiently stored. Thus, the attitude | position of the guide plate 12b of the thermal storage material guide part 12 is controlled. In addition, when the outlet temperature of the heat storage material heater 11b is lower than a reference value that is arbitrarily set, the heat storage material T is guided to the heat storage material cooler 15 as not being sufficiently stored in the heat storage material T. As described above, the posture of the guide plate 12b of the heat storage material guide 12 is controlled. The reference value that is arbitrarily set is a value that is set in consideration of the outside air temperature when the apparatus is operated, and also the daily change of the air temperature. The heat storage material T supplied to the heat storage material storage tank 13 does not necessarily have to be the highest temperature obtained by receiving heat during the day, and the total amount of heat stored in the heat storage material storage tank 13 is not obtained at night when sunlight cannot be obtained. Any condition may be used as long as the necessary amount of heat can be provided with a certain margin. Further, even if the arbitrarily set reference value is lower than the temperature sufficient to heat the heat transfer medium X, while it remains in the heat storage material storage tank 13, the heat of the high-temperature heat storage material T previously supplied Some increase in temperature is expected. Therefore, it is preferable that the reference value to be arbitrarily set is set empirically from the characteristics of the apparatus and the climate of the location.

  Further, the control device 20 adjusts the amount of the heat storage material T supplied from the delivery device 14 to the heat receiving unit 100 based on the internal temperature of the heat receiving unit 100. The control device 20 calculates the amount of the heat storage material T to be supplied to the heat receiving unit 100 based on the internal temperature of the heat receiving unit 100, and determines the flow rate of the fluidized gas Za to be supplied to the delivery pipe 14a based on this calculated amount. The opening degree of the flow rate adjusting valve 14c is adjusted based on the determined flow rate. For example, when the temperature of the heat receiving unit 100 is higher than the stored reference value, the opening degree of the flow rate adjusting valve 14c is adjusted so that the supply amount from the delivery device 14 to the heat receiving unit 100 is reduced. Moreover, when the temperature of the heat receiving part 100 is lower than the memorize | stored reference value, the opening degree of the flow volume adjustment valve 14c is adjusted so that the supply amount from the sending apparatus 14 to the heat receiving part 100 may increase.

  Next, operation | movement of the thermal storage system 10 of this embodiment comprised in this way is demonstrated. In addition, although the heat storage system 10 of this embodiment can be drive | operated for 24 hours, in the following description, it demonstrates on the basis of sunrise time.

  First, at the sunrise time, the control device 20 activates the drive motor 18b of the transport unit 18 and drives the conveyor 18a. As a result, the heat storage material T stored in the low-temperature heat storage material storage tank 17 is conveyed upward by the conveyor 18 a and supplied to the heat storage material heater 11 b of the condensing heater 11. Inside the heat storage material heater 11b, the heat storage material T is fluidized by the fluidized gas Za supplied from the fluidized gas supply device 19. When a new heat storage material T is supplied from the conveyor 18 a to the heat storage material heater 11 b, the heat storage material T accumulated first is pushed out and falls to the heat storage material guide portion 12.

  Here, in a certain period from the sunrise time, the energy obtained from sunlight is small, and the heat storage material T is not sufficiently heated in the heat storage material heater 11b. Therefore, the control device 20 determines from the measurement result of the first thermometer 21 that the heat storage material T is not sufficiently stored, and the heat storage material T is guided to the heat storage material cooler 15. The posture of the guide plate 12b of the material guide unit 12 is controlled. As a result, the heat storage material T that has passed through the heat storage material heater 11b is returned to the low-temperature heat storage material storage tank 17 via the heat storage material cooler 15, and is again transported to the heat storage material heater 11b by the transport unit 18. That is, until the heat storage material T is sufficiently heated in the heat storage material heater 11b, the heat storage material T is circulated without being supplied to the heat storage material storage tank 13, and is gradually supplied by being repeatedly supplied to the heat storage material heater 11b. The temperature is increased.

  When a certain period elapses from the sunrise time, the energy obtained from sunlight increases, and the heat storage material T is sufficiently heated in the heat storage material heater 11b. For this reason, the control device 20 determines that the heat storage material T is sufficiently stored from the measurement result of the first thermometer 21, so that the heat storage material T is guided to the heat storage material storage tank 13. The posture of the 12 guide plates 12b is controlled. As a result, the heat storage material T that has passed through the heat storage material heater 11 b is supplied to the heat storage material storage tank 13.

  The heat storage material T stored in the heat storage material storage tank 13 is sent out to the heat receiving unit 100 by the delivery device 14. Here, the control device 20 calculates the supply amount of the heat storage material T based on the measurement result of the second thermometer 22 so that the temperature of the heat receiving unit 100 is maintained, and adjusts the flow rate based on the calculation result. The opening degree of the valve 14c is adjusted, and thereby the flow rate of the fluidized gas Za supplied to the delivery pipe 14a is adjusted. As a result, a necessary amount of the heat storage material T is supplied from the delivery device 14 to the heat receiving unit 100.

  Inside the heat receiving unit 100, the heat storage material T is fluidized by the fluidized gas Za supplied from the fluidized gas supply device 19. When the heat storage material T is supplied to such a heat receiving part 100, the heat storage material T and the heat transfer medium X are heat-exchanged, and thereby the heat transfer medium X is heated. The heat storage material T cooled by heat exchange with the heat transfer medium X is pushed out when a new heat storage material T is supplied from the delivery device 14, falls, and is supplied to the heat storage material cooler 15. The heat storage material T supplied to the heat storage material cooler 15 is cooled by the fluidized gas Za supplied from the fluidized gas supply device 19 to the heat storage material cooler 15, and then returned to the low-temperature heat storage material storage tank 17.

  The fluidized gas Za discharged from the heat receiving unit 100 and the heat storage material cooler 15 is guided to the exhaust pipe 16a of the exhaust unit 16 and passes through the heat exchanger 16b to be released to the atmosphere. In the heat exchanger 16b, the heat transfer medium X is heated and then supplied to the heat receiving unit 100, for example.

  Further, at the time when the energy obtained from the sun becomes strong, the control device 20 supplies the heat storage material T in an amount exceeding the supply amount of the heat storage material T from the delivery device 14 to the heat receiving unit 100 to the heat storage material heater 11b. The transport speed of the conveyor 18a is increased. As a result, the heat storage material T supplied to the heat storage material storage tank 13 becomes larger than the heat storage material T discharged from the heat storage material storage tank 13, and the amount of the heat storage material T in the heat storage material storage tank 13 increases.

  Then, when the sunset time approaches and the heat storage material T cannot be sufficiently heated by the heat storage material heater 11b, the control device 20 changes the posture of the guide plate 12b of the heat storage material guide unit 12, and from the heat storage material heater 11b The discharged heat storage material T is guided to the low-temperature heat storage material storage tank 17 via the heat storage material cooler 15. Thereafter, the conveyor 18a is stopped. Thus, while the heat storage material T discharged from the heat storage material heater 11 b is guided to the low temperature heat storage material storage tank 17, the heat storage material T stored in the heat storage material storage tank 13 is supplied to the heat receiving unit 100 by the delivery device 14. Is done. For this reason, the heat transfer medium X can be heated in the heat receiving unit 100 even at a time when energy from the sun cannot be obtained.

  FIG. 2 is a graph showing the relationship between the time and the temperature of the first thermometer (the outlet temperature of the heat storage material heater 11b) in the heat storage system 10 of the present embodiment. In FIG. 2, a graph showing the transport amount of the heat storage material T of the transport unit 18, a graph showing the energy obtained from the sun, and a graph showing the amount of heat storage material T held in the heat storage material storage tank 13 are overlapped. Show. In the example shown in FIG. 2, in order to vaporize the heat transfer medium X in the heat receiving unit 100, the temperature at which the heat storage material guide unit 12 is set is higher than the boiling point of the heat transfer medium X.

  As shown in this figure, at the time before sunrise, the heat transfer material X is heated using the heat storage material T stored in the heat storage material storage tank 13 and the supply of the heat storage material T to the heat storage material storage tank 13 is stopped. Therefore, the amount of the heat storage material T in the heat storage material storage tank 13 gradually decreases. On the other hand, when the sunrise time passes and the conveyor 18a is operated and the heat storage material T is sufficiently heated by the heat storage material heater 11b, the amount of the heat storage material T in the heat storage material storage tank 13 gradually increases. Thereafter, as the energy obtained from the sun increases, the transport amount on the conveyor 18a increases, and the amount of the heat storage material T in the heat storage material storage tank 13 greatly increases. Then, when the sunset time approaches and the energy obtained from the sun decreases, the heat storage material T that has passed through the heat storage material heater 11b is supplied to the low-temperature heat storage material storage tank 17 via the heat storage material cooler 15, and then The conveyor 18a is stopped until the sunrise time passes, and the amount of the heat storage material T in the heat storage material storage tank 13 gradually decreases.

  According to the heat storage system 10 of the present embodiment as described above, since solar heat can be stored in the heat storage material T, solar heat can be used even at night or in cloudy weather without being influenced by time or weather. Further, according to the heat storage system 10 of the present embodiment, the heat storage material T is made of a substance that behaves as a fluid, and heat is transported by sending out the heat storage material T itself by the delivery device 14. For this reason, compared with the case where the heat once stored in the heat storage material T is moved to another medium and transported, heat can be transported extremely efficiently. Therefore, according to the heat storage system 10 of the present embodiment, solar heat can be used without being influenced by time and weather, and further, the utilization efficiency of the stored heat can be increased.

  Moreover, in the heat storage system 10 of this embodiment, the conveyance unit 18 which conveys the thermal storage material T which passed the heat receiving part 100 to the condensing heater 11 is provided. For this reason, the heat storage material T can be circulated and reused, and the heat storage system 10 can be configured with a small amount of the heat storage material T.

  Moreover, in the heat storage system 10 of this embodiment, the heat storage material cooler 15 which cools the heat storage material T which has been arrange | positioned between the heat receiving part 100 and the conveyance unit 18 and passed the heat receiving part 100 is provided. For this reason, the heat storage material T supplied to the transport unit 18 can be sufficiently lowered in temperature, and the heat resistance performance of the transport unit 18 can be reduced. Conversely, the heat storage material cooler 15 can be omitted by improving the heat resistance performance of the transport unit 18 and setting the heat resistance temperature sufficiently higher than the temperature of the heat storage material T delivered from the heat receiving unit 100.

  Further, in the heat storage system 10 of the present embodiment, the low-temperature heat storage material storage tank that is provided separately from the heat storage material storage tank 13 and that can temporarily store the heat storage material T and supply the stored heat storage material T to the transport unit 18. 17 and a heat storage material guide part 12 for guiding the heat storage material T discharged from the condenser heater 11 to the low temperature heat storage material storage tank 17 through the heat storage material storage tank 13 and the heat storage material cooler 15. Yes. For this reason, it becomes possible to circulate the heat storage material T so that the condensing heater 11 may pass through without passing through the heat storage material storage tank 13. Therefore, by repeatedly circulating the heat storage material T through the condenser heater 11 as described above at a time shortly after the sunrise time, it is possible to increase the temperature of the heat storage material T in advance, and in a short time thereafter. It is possible to raise the temperature of the heat storage material T to a temperature at which the heat storage material T can be supplied to the heat storage material storage tank 13.

  Moreover, in the heat storage system 10 of this embodiment, the heat storage material storage tank 13 is arrange | positioned under the condensing heater 11, the delivery apparatus 14 is arrange | positioned under this heat storage material storage tank 13, and the downward direction of this delivery apparatus 14 A heat storage material cooler 15 is disposed, and a low-temperature heat storage material storage tank 17 is disposed below the heat storage material cooler 15. For this reason, the heat storage material T can be moved while dropping using gravity, and the heat storage system 10 is excellent in energy efficiency.

  Moreover, in the heat storage system 10 of this embodiment, sand is used as the heat storage material T. Thereby, heat can be stored as sensible heat, and the heat storage material T does not undergo phase transition. Therefore, the heat storage material T can be similarly transported regardless of the amount of energy obtained from the sun.

[Drying system]
Next, the drying system 1 having the above-described heat storage system 10 will be described. FIG. 3 is a flowchart showing a schematic configuration of the drying system 1 of the present embodiment. As shown in this figure, the drying system 1 according to this embodiment includes a plurality of evaporators 2 (heat transfer medium heating units), a steam drum 3, an auxiliary boiler 4, a drying furnace 5, and a drying furnace fluidizing gas. A supply device 6, a heat transfer medium circulation unit 7, a superheater 8, a fluidized steam supply unit 9, and a heat storage system 10 are provided.

  The evaporator 2 evaporates the heat transfer medium X by the heat supplied from the heat storage system 10 and corresponds to the heat receiving unit 100 described above. In this embodiment, water is used as the heat transfer medium X, and the heat transfer medium X is not limited to water, and for example, an organic solvent, an inorganic salt, or a metal can be used. For example, when an organic solvent is used, alcohols, oils and fats having a relatively high boiling point, and liquid at room temperature can be used. When inorganic salts or metals are used, those that become liquid at a relatively low temperature are selected in order to ensure fluidity.

  The steam drum 3 is a container for temporarily storing the heat transfer medium X vaporized by the evaporator 2, and is disposed between the evaporator 2 and the drying furnace 5. Further, the upper part of the steam drum 3 is connected to the drying furnace 5, and the bottom part is connected to the heat transfer medium circulation part 7. When the heat transfer medium X is supplied to the steam drum 3, the heat transfer medium X in a vapor state is accumulated on the upper portion of the steam drum 3 and is sent out toward the drying furnace 5. Further, the heat transfer medium X in a liquid state is accumulated at the bottom of the steam drum 3 and is sent out to the heat transfer medium circulation unit 7.

  The auxiliary boiler 4 is a general-purpose boiler that can be easily started and stopped, for example, and is connected to the steam drum 3. When the amount of heat stored in the heat storage system 10 is small and the amount of steam generated in the evaporator 2 decreases, the auxiliary boiler 4 supplementarily heats the heat transfer medium X to generate steam, and the steam is converted into steam. The drum 3 is supplied.

  The drying furnace 5 includes a chamber 5a, a dividing wall 5b that divides the interior of the chamber 5a into a plurality of regions in the horizontal direction, and a heat transfer tube 5c that is inserted into the chamber 5a. The chamber 5a is a container in which the material to be dried Y is stored. In the chamber 5a, when the material to be dried Y is supplied from the outside, a part of the material to be dried Y previously stored is pushed out and discharged. A plurality of dividing walls 5b are provided at the bottom of the chamber 5a, and a plurality of dividing walls 5b are provided so that the wall surfaces face each other. As this dividing wall 5b, there are provided a first dividing wall 5b1 having an opening in the lower part and a second dividing wall 5b2 having no opening and lower in height than the first dividing wall 5b1. They are alternately arranged in the chamber 5a. As the interior of the chamber 5a is divided by the plurality of dividing walls 5b, the material to be dried Y advances while meandering up and down in the chamber 5a as shown by the arrows in FIG. The heat transfer tube 5 c has an inlet end connected to the steam drum 3 and an outlet end connected to the heat transfer medium circulating unit 7. A heat transfer medium X that exchanges heat with the material to be dried Y in the chamber 5a flows through the heat transfer tube 5c. In this drying furnace 5, the material to be dried Y that flows by the drying furnace fluidizing gas Zb supplied from the drying furnace fluidizing gas supply device 6 and the heat transfer medium X that flows through the heat transfer pipe 5 c are subjected to heat exchange to exchange the heat. Dry matter Y is dried.

  The to-be-dried material Y dried by such a drying furnace 5 is a solid fuel used as fuel, such as a pulverized coal boiler (not shown), and contains a lot of moisture (for example, a moisture content of 20% or more). Examples of such a material to be dried Y include powdered lignite and biomass. In addition, in order to improve the fluidity | liquidity in the chamber 5a, you may store fluid media, such as sand other than such to-be-dried material Y, in the inside of the chamber 5a. This fluid medium is discharged from the chamber 5a, separated from the material to be dried Y, and returned to the chamber 5a again.

  The drying furnace fluidizing gas supply device 6 includes a circulation pipe 6a, an inert gas generator 6b, a blower 6c, a heat exchanger 6d, and a cooler 6e. The circulation pipe 6a is a pipe whose one end is branched into a large number and connected to the bottom of the chamber 5a, and the other end is connected to the ceiling of the chamber 5a, and serves as a flow path for the drying furnace fluidizing gas Zb. The one end side of the circulation pipe 6a is connected to the bottom of the chamber 5a so that each branch end is connected to each region of the chamber 5a divided by the dividing wall 5b. The inert gas generator 6b generates nitrogen gas (inert gas) used as the drying furnace fluidizing gas Zb from the atmosphere, for example, and is connected to the circulation pipe 6a. The blower 6c is provided in the middle part of the circulation pipe 6a, and pumps the drying furnace fluidizing gas Zb. The blower 6c fluidizes the drying furnace toward one end side of the circulation pipe 6a (side connected to the bottom of the chamber 5a) so that the drying furnace fluidizing gas Zb is supplied upward from the bottom of the chamber 5a. Gas Zb is pumped. Thus, the drying furnace fluidizing gas Zb is supplied into the chamber 5a from one end side (the side connected to the bottom of the chamber 5a) of the circulation pipe 6a, and connected to the other end side (connected to the ceiling of the chamber 5a). The drying furnace fluidizing gas Zb inside the chamber 5a is recovered from the side that has been made.

  6 d of heat exchangers are the intermediate parts of the circulation piping 6a, and are arrange | positioned in the downstream of the blower 6c. The heat exchanger 6d exchanges heat between a heat transfer medium X flowing through a return pipe 7a, which will be described later, included in the heat transfer medium circulation unit 7, and a drying furnace fluidizing gas Zb flowing through the circulation pipe 6a. In this heat exchanger 6d, the heat transfer medium X and the drying furnace fluidizing gas Zb are subjected to heat exchange, whereby the drying furnace fluidizing gas Zb is heated before being supplied to the drying furnace 5, and the drying furnace fluidizing is performed. It is possible to prevent the temperature inside the chamber 5a from being lowered by the gas Zb.

  The cooler 6e is an intermediate part of the circulation pipe 6a and is arranged on the upstream side of the blower 6c. The cooler 6e cools the drying furnace fluidizing gas Zb in order to condense and separate moisture contained in the drying furnace fluidizing gas Zb heated by passing through the inside of the chamber 5a. Thereby, the drying furnace fluidizing gas Zb is supplied to the blower 6c and the like, and it is possible to prevent dew condensation from occurring in the blower 6c and the like.

  By such a drying furnace fluidizing gas supply device 6, the drying furnace fluidizing gas Zb is supplied upward from the bottom of the chamber 5 a, whereby the material to be dried Y stored in the chamber 5 a flows. . Thereby, heat exchange between the material to be dried Y and the heat transfer medium X is promoted, and the material to be dried Y can be dried in a short time.

  The heat transfer medium circulation unit 7 includes a return pipe 7a, a condenser 7b, a feed water pump 7c, a feed water preheater 7d, and a steam drum connection pipe 7e. The return pipe 7 a is a pipe that connects the drying furnace 5 and the evaporator 2 and returns the heat transfer medium X discharged from the drying furnace 5 to the evaporator 2 again. As shown in FIG. 3, the return pipe 7a passes through the heat exchanger 6d, and thereby the heat transfer medium X flowing through the return pipe 7a and the drying furnace fluidizing gas Zb flowing through the circulation pipe 6a. Is exchanged, and the amount of heat of the heat transfer medium X is transferred to the drying furnace fluidized gas Zb.

  The condenser 7b is disposed in the middle of the return pipe 7a and downstream of the heat exchanger 6d, and cools and liquefies the heat transfer medium X, which is steam, by, for example, heat exchange with the atmosphere. The feed water pump 7c is disposed further downstream of the condenser 7b, and pumps the heat transfer medium X liquefied by the condenser 7b toward the evaporator 2. The feed water preheater 7d is arranged further downstream of the feed water pump 7c, and exchanges heat between the heat transfer medium X discharged from the feed water pump 7c and the heat transfer medium X upstream of the condenser 7b. The heat transfer medium X supplied to the evaporator 2 is preheated. The steam drum connection pipe 7e is a pipe connecting the bottom of the steam drum 3 and the return flow pipe 7a, and condensates the liquid heat transfer medium X collected at the bottom of the steam drum 3 without passing through the drying furnace 5. Guide to the upstream side of the vessel 7b. A port (not shown) for additionally supplying the heat transfer medium X to the return pipe 7a is provided on the upstream side of the water supply pump 7c. Then, the heat transfer medium X is additionally supplied from the port to the return pipe 7a.

  The superheater 8 is disposed between the steam drum 3 and the drying furnace 5. The superheater 8 corresponds to the heat receiving unit 100 described above. The superheater 8 raises the temperature of the heat transfer medium X supplied from the steam drum 3 to the heat transfer tube 5c of the drying furnace 5 to a saturation temperature or higher (eg, about 200 ° C.) by solar heat.

  The fluidized steam supply unit 9 includes a superheated steam supply pipe 9a and an opening / closing valve 9b. The superheated steam supply pipe 9a is a pipe connecting the superheater 8 and the bottom of the chamber 5a, and supplies the heat transfer medium X heated by the superheater 8 into the chamber 5a as a fluidized gas. The on-off valve 9b is disposed in the middle of the superheated steam supply pipe 9a, and opens and closes the flow path formed by the superheated steam supply pipe 9a.

  The heat storage system 10 stores solar heat during the day and supplies heat to the evaporator 2 and the superheater 8. Further, at night, the stored heat is supplied to the evaporator 2 and the superheater 8. Accordingly, it is possible to generate steam in the evaporator 2 for 24 hours and superheat the steam in the superheater 8.

  Then, operation | movement of the drying system 1 of this embodiment comprised in this way is demonstrated. In the following description of the operation, it is assumed that the material to be dried Y is continuously supplied to the chamber 5a of the drying furnace 5 in a constant amount.

  The steam-like heat transfer medium X generated by the evaporator 2 is supplied to the steam drum 3. The heat transfer medium X is gas-liquid separated in the steam drum 3, and after the temperature of the steam heat transfer medium X is further raised by the superheater 8, the heat transfer medium X is supplied to the heat transfer tube 5 c of the drying furnace 5. On the other hand, the liquid heat transfer medium X is supplied from the steam drum connection pipe 7 e to the heat transfer medium circulation unit 7 and is supplied to the evaporator 2 again. The steam discharged from the steam drum 3 is heated to a temperature equal to or higher than the saturation temperature, whereby the drying temperature in the drying furnace 5 can be further increased, and the material to be dried Y can be dried in a short time. It becomes.

  Further, in the drying furnace fluidizing gas supply device 6, the drying furnace fluidizing gas Zb (inert gas) is supplied from the inert gas generator 6b to the circulation pipe 6a, and the blower 6c is driven, whereby the circulation pipe 6a. The inner drying furnace fluidizing gas Zb is pumped toward the drying furnace 5. The drying furnace fluidizing gas Zb supplied to the drying furnace 5 is heated in advance in the heat exchanger 6d and then supplied from the bottom of the chamber 5a to the inside of the chamber 5a. By supplying the drying furnace fluidizing gas Zb from the bottom of the chamber 5a, the material to be dried Y in the chamber 5a is fluidized. The drying furnace fluidizing gas Zb in the chamber 5a is recovered from the upper part of the chamber 5a to the circulation pipe 6a, and after moisture is removed in the cooler 6e, it is pumped again by the blower 6c.

  Moreover, in the drying system 1 of this embodiment, the superheated vapor-shaped heat transfer medium X can also be supplied to the drying furnace 5 as fluidized gas. Specifically, when the on-off valve 9b is opened, the heat transfer medium X is supplied as fluidized gas into the chamber 5a through the superheated steam supply pipe 9a. For example, when the drying system is temporarily stopped and then restarted, the temperature in the chamber 5a is lowered. In such a case, when the heat transfer medium X is brought into direct contact with the object to be dried Y, the heat transfer medium X condenses, the surface of the object to be dried Y gets wet, and the flow of the object to be dried Y is inhibited. For this reason, when the temperature in the chamber 5a is low, the drying furnace fluidizing gas supply device 6 supplies the drying furnace fluidizing gas Zb made of an inert gas to the chamber 5a.

  When the heat transfer medium X supplied to the heat transfer tube 5c inserted into the chamber 5a is supplied, the heat transfer medium X inside the heat transfer tube 5c and the material to be dried Y outside the heat transfer tube 5c are heat-exchanged. As a result, the material to be dried Y is heated. As a result, the moisture contained in the material to be dried Y evaporates and the material to be dried Y is dried. The dried to-be-dried material Y is discharged to the outside of the chamber 5a by being continuously pushed by the new to-be-dried material Y supplied to the chamber 5a. In addition, the water | moisture content evaporated from the to-be-dried material Y is collect | recovered by the circulation piping 6a with drying furnace fluidization gas Zb.

  The heat transfer medium X passing through the heat transfer tube 5 c and discharged to the outside of the chamber 5 a flows into the return pipe 7 a of the heat transfer medium circulation unit 7. The heat transfer medium X flowing into the return pipe 7a passes through the heat exchanger 6d, passes through the feed water preheater 7d, and is returned to the liquid by being cooled by the condenser 7b. The heat transfer medium X that has become liquid is pressure-fed toward the evaporator 2 by the water supply pump 7c. The heat transfer medium X pumped by the feed water pump 7c is preheated in the feed water preheater 7d and then supplied to the evaporator 2 again.

  Further, the auxiliary boiler 4 is operated as necessary. When the auxiliary boiler 4 is operated, steam (heat transfer medium X) is generated and supplied to the steam drum 3. Thus, the steam supplied from the auxiliary boiler 4 to the steam drum 3 is used by being mixed with the steam (heat transfer medium X) supplied from the evaporator 2 to the steam drum 3.

  According to the drying system 1 of the present embodiment as described above, since the heat storage system 10 is provided, steam is generated in the evaporator 2 for 24 hours without being influenced by time and weather, and in the superheater 8. Steam can be overheated. For this reason, it becomes possible to dry the to-be-dried object Y for 24 hours.

(Second Embodiment)
Next, a second embodiment of the present invention will be described. In the description of the present embodiment, the description of the same parts as those of the first embodiment is omitted or simplified.

  FIG. 4 is a flowchart showing a schematic configuration of the heat storage system 10A of the present embodiment. As shown in this figure, the heat storage system 10A of the present embodiment is not provided with the low-temperature heat storage material storage tank 17 of the first embodiment, and the heat storage material T is directly supplied from the heat storage material cooler 15 to the conveyor 18a. The Moreover, the heat storage material guide part 12 distribute | distributes the heat storage material T supplied from the heat storage material heater 11b to the heat storage material storage tank 13 and the heat receiving part 100 with the attitude | position of the guide plate 12b, and functions as a distribution part of this invention. . Further, the transport unit 18 includes a rotary valve 18d that supplies a constant amount of the heat storage material T stored in the hopper 18c to the heat storage material heater 11b.

  In the present embodiment, the conveyance unit 18 is always driven at night and the like, and a fixed amount is supplied to the heat storage material heater 11b by the rotary valve 18d. And the control apparatus 20 controls the thermal storage material guide part 12 according to the temperature (measurement result of the 1st thermometer 21) of the thermal storage material T discharged | emitted from the thermal storage material heater 11b, and is stored the thermal storage material storage tank 13. FIG. And the heat receiving unit 100. For example, when the temperature of the heat storage material T is low, the control device 20 decreases the amount of the heat storage material T distributed to the heat receiving unit 100 and increases the distribution to the heat storage material storage tank 13. In this case, the control device 20 increases the supply amount of the heat storage material T supplied from the heat storage material storage tank 13 to the heat receiving unit 100. Accordingly, a large amount of the heat storage material T accumulated in the lower part of the heat storage material storage tank 13 is supplied to the heat receiving unit 100, and the temperature of the heat receiving unit 100 is maintained at an appropriate temperature.

  Further, for example, the temperature of the heat storage material T discharged from the heat storage material heater 11b supplies the entire amount of the heat storage material T discharged from the heat storage material heater 11b to the heat reception unit 100, so that the heat reception unit 100 becomes the appropriate temperature. When the temperature is equal to, the control device 20 supplies the heat storage material T only to the heat receiving unit 100 and sets the distribution to the heat storage material storage tank 13 to zero. In addition, when the temperature of the heat storage material T discharged from the heat storage material heater 11b is sufficiently high, only a part of the heat storage material T discharged from the heat storage material heater 11b is supplied to the heat receiving unit 100, and the rest Is distributed to the heat storage material storage tank 13. Thereby, the heat storage material T sufficiently heated in the heat storage material storage tank 13 is stored.

  As described above, the heat storage material T that is not sufficiently heated is supplied to the heat storage material storage tank 13 at a time (nighttime) when the temperature of the heat storage material T is low. For this reason, the low temperature heat storage material T accumulated in the heat storage material storage tank 13 is gradually discharged during the day when a large amount of sufficiently heated heat storage material T can be generated, and the heat storage material T is stored until the temperature of the heat storage material T is low. The inside of the material storage tank 13 needs to be only the heat storage material T having a high temperature. As a result, the heat storage material T discharged from the heat storage material storage tank 13 always has a high temperature, so that sufficient heat can be supplied even at night.

  According to such a heat storage system 10A of this embodiment, the heat storage material guide part 12 which distributes the heat storage material T supplied from the heat storage material heater 11b to the heat storage material storage tank 13 and the heat receiving part 100 is provided, and a low temperature heat storage material is provided. Since the storage tank 17 is omitted, a small facility can be provided.

(Third embodiment)
Next, a third embodiment of the present invention will be described. In the description of the present embodiment, the description of the same parts as those of the first embodiment is omitted or simplified.

  FIG. 5 is a flowchart showing a schematic configuration of the heat storage system 10B of the present embodiment. As shown in this figure, in the heat storage system 10 </ b> B of the present embodiment, the low-temperature heat storage material storage tank 17 is disposed above the heat storage material cooler 15. Further, a low-temperature heat storage material storage tank 17 is arranged between the heat storage material guide part 12 and the heat storage material cooler 15, and the heat storage material T discharged from the heat storage material guide part 12 passes through the low-temperature heat storage material storage tank 17. It is configured to be supplied to the cooler 15. Furthermore, the heat storage material T discharged from the low-temperature heat storage material storage tank 17 is supplied to the conveyor 18 a via the heat storage material cooler 15.

  In such a heat storage system 10B of this embodiment, when the temperature of the heat storage material T discharged from the heat storage material heater 11b after the sunset time is low, the heat storage material T discharged from the heat receiving unit 100 stores heat. It is cooled in the material cooler 15, lifted by the transport unit 18, and stored in the low-temperature heat storage material storage tank 17 through the condenser heater 11 and the heat storage material guide part 12.

  In addition, according to the heat storage system 10B of this embodiment shown in FIG. 5, the heat storage material T supplied to the low-temperature heat storage material storage tank 17 is directly supplied from the heat storage material guide part 12 without passing through the heat storage material cooler 15. . Therefore, compared with the heat storage system 10 of 1st Embodiment shown in FIG. 1, the heat storage material T of a certain high temperature will be supplied, Therefore, the allowable temperature of the low temperature heat storage material storage tank 17 is 1st Embodiment of FIG. Compared to the heat storage system 10 according to the above, it is necessary to make a design that can withstand a high temperature, and the manufacturing cost of the low-temperature heat storage material storage tank 17 alone increases. However, the effect of reducing the size of the entire system is great, and as a whole, it is expected to lead to cost reduction. In addition, since the installation cost of one system is influenced also by location conditions, it will judge comprehensively from these conditions and which embodiment is advantageous.

  According to the heat storage system 10B of this embodiment as described above, since the low-temperature heat storage material storage tank 17 is disposed above the heat storage material cooler 15, the height of the heat storage system 10B is set to the heat storage system of the first embodiment. It becomes possible to make it smaller than the system 10.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the spirit of the present invention.

  For example, in the said embodiment, the structure provided with the sending device 14 which bleeds a part of fluidization gas Za and sends out the thermal storage material T from the thermal storage material storage tank 13 was employ | adopted. However, the present invention is not limited to this, and it is also possible to adopt a configuration using a heat-resistant rotary feeder, a screw conveyor, or the like.

  Moreover, in the said embodiment, the air suck | inhaled from air | atmosphere was employ | adopted as fluidization gas Za, and the inert gas was employ | adopted as drying furnace fluidization gas Zb, but oxygen is used as the thermal storage material T used for the thermal storage system 10. In the case where a substance that can react with the gas is used, a configuration in which an inert gas is supplied from the inert gas generator 6b of the drying furnace fluidizing gas supply device 6 as the fluidizing gas Za may be adopted. Is possible.

1 Drying system 2 Evaporator (heat receiving part, heat transfer medium heating part)
3 Steam drum 4 Auxiliary boiler 5 Drying furnace 5a Chamber 5b Split wall 5b1 Split wall 5b2 Split wall 5c Heat transfer pipe 6 Drying furnace fluidizing gas supply device 6a Circulating pipe 6b Inert gas generator 6c Blower 6d Heat exchanger 6e Cooler 7 Heat transfer medium circulation section 7a Return pipe 7b Condenser 7c Feed water pump 7d Feed water preheater 7e Steam drum connection pipe 8 Superheater (heat receiving section)
9 Fluidized steam supply section 9a Superheated steam supply pipe 9b Open / close valve 10 Thermal storage system 10A Thermal storage system 10B Thermal storage system 11 Condensing heater 11a Cylindrical condenser mirror 11b Thermal storage material heater 12 Thermal storage material guide section (guide section, distribution section) )
12a Guide pipe 12b Guide plate 13 Storage material storage tank (storage tank)
14 Sending device 14a Sending piping 14b Extraction piping 14c Flow rate adjusting valve 15 Heat storage material cooler (cooling section)
16 Exhaust part 16a Exhaust pipe 16b Heat exchanger 16c Recovery pipe 17 Low-temperature heat storage material storage tank (second storage tank)
18 Transport unit (transport means)
18a Conveyor 18b Drive motor 18c Hopper 18d Rotary valve 19 Fluidizing gas supply device 19a Supply pipe 19b Blower 20 Control device 21 First thermometer 22 Second thermometer 100 Heat receiving part T Heat storage material X Heat transfer medium Y Dry object Za Flow Gas Zb Drying Furnace Fluidized Gas

Claims (8)

A condensing heater that heats the heat storage material made of fluid by collecting sunlight; and
A storage tank for storing the heat storage material heated by the condenser heater;
A heat storage system comprising: a delivery device that delivers the heat storage material from the storage tank to a heat receiving unit.   The heat storage system according to claim 1, further comprising transport means for transporting the heat storage material that has passed through the heat receiving unit to the condenser heater.   The heat storage system according to claim 2, further comprising a cooling unit that is disposed between the heat receiving unit and the conveying unit and that cools the heat storage material that has passed through the heat receiving unit. A second storage tank provided as a separate body from the storage tank, capable of temporarily storing the heat storage material and supplying the stored heat storage material to the conveying means;
4. The heat storage system according to claim 2, further comprising: a guide unit that guides the heat storage material discharged from the condenser heater separately to the storage tank and the second storage tank. 5.   The heat storage system according to claim 2, further comprising a distribution unit that distributes the heat storage material discharged from the condenser heater to the storage tank and the heat receiving unit.   The heat storage system according to any one of claims 1 to 5, wherein the storage tank is disposed below the condenser heater, and the delivery device is disposed below the storage tank.   The heat storage system according to any one of claims 1 to 6, wherein the heat storage material is sand made of an aggregate of granular ceramics. The heat storage system according to any one of claims 1 to 7,
A heat transfer medium heating section that comprises the heat receiving section and heats the heat transfer medium by exchanging heat between the heat storage material and the heat transfer medium;
A drying system comprising: a drying furnace that dries the object to be dried by exchanging heat between the heat transfer medium heated by the heat transfer medium heating unit and the object to be dried.

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