JP5026869B2 - Cold energy utilization system, ice transport device, and cold energy utilization method - Google Patents

Description

  The present invention relates to a technology of a cold energy utilization system that utilizes cold energy generated when a predetermined liquid is vaporized. The present invention also relates to the technology of an ice manufacturing device and an ice transport device that constitute such a cold energy utilization system.

Natural gas is known as one of the energies that play part of the role of coal and oil. When there is a geographical restriction such as in Japan where a natural gas pipeline network cannot be established with a production site, it is common to transport natural gas after it is cooled and liquefied at the production site. This is because natural gas is liquefied and its volume becomes 1/600 that of gas, which is very convenient for transportation and storage. When the liquefied natural gas (LNG) is vaporized again, the liquefied natural gas is heated by a vaporizer at the receiving terminal. Since the receiving terminal is often located in the coastal area, a general method is to vaporize by exchanging heat between seawater and liquefied natural gas.

・・・式１ Here, FIG. 1 shows an outline of a conventional system including a vaporizer for vaporizing LNG. The LNG transported by sea transportation or the like is stored in the LNG tank 101. Note that LNG transported and stored at sea is a liquid of minus 162 ° C. The LNG tank 101 and the LNG vaporizer 102 are connected by an LNG supply channel 103, and a necessary amount of LNG is supplied to the LNG vaporizer 102 as necessary. On the other hand, a seawater supply channel 104 for supplying seawater is connected to the LNG vaporizer 102, and seawater that performs heat exchange with the LNG is supplied to the LNG vaporizer 102 as necessary. In the LNG vaporizer 102, LNG is vaporized by exchanging heat between LNG and seawater, and the vaporized LNG is supplied to a power plant or the like. On the other hand, when LNG is vaporized by exchanging heat between LNG and seawater, a considerable amount of heat of vaporization (cold heat) is generated from the inside of the LNG vaporizer 102. However, the place where the vaporizer 102 is installed is often a coastal area, and since there is no facility that uses this cold around the vaporizer 102, most of the cold heat is converted into seawater via the discharge channel 105. It was discharged. That is, the effective use of the cold exhausted from the vaporizer 102 has not been achieved. For example, in a 500,000 kw power plant that uses LNG, cold heat equivalent to 7,800 Rt is discharged into seawater from Equation 1. In Formula 1, the amount of heat generated is 500,000 kw, the amount of generated heat is 860 kcal / kw, the heat of vaporization when vaporizing LNG at minus 162 ° C. is 220 kcal / kg, the power generation efficiency is 0.5, and the amount of heat generated by LNG is It is calculated as 8,000 kcal / kg, 1 Rt corresponds to a heat quantity of 3024 kcal / h.

... Formula 1

  On the other hand, for example, a technique described in Patent Document 1 is known as a technique that uses waste heat (heat) generated in an ironworks, a dust disposal site, or the like instead of cold heat. According to the technique described in Patent Document 1, the heat generated in a steelworks or a dust disposal site is stored in a heat storage body mounted on a truck and transported to use the heat as waste heat in a remote place. can do. However, the technology described in Patent Document 1 is a technology that uses heat only, and the heat generated from the above-described vaporizer, which is completely different from the heat, cannot be transferred by the technology described in Patent Document 1. .

Further, as a technique used for an air conditioning system of a building or the like, there is known an ice heat storage system in which cold heat during cooling is stored in an ice state in a heat storage tank. There are two types of ice stored in the heat storage tank: ice lump-shaped and sherbet-shaped (slurry mixed with fine ice and water). The sherbet-shaped ice is easy to handle in terms of taking out the heat such as defrosting and other points. Various techniques have been proposed as techniques for generating sherbet-like ice (see, for example, Patent Documents 2 to 5). For example, according to the technique described in Patent Document 2, in an ice heat storage system that employs a multi-tank heat storage tank, sherbet-like ice is simultaneously supplied in parallel to the water in the small tank. Then, the ice can be stored almost uniformly in each tub.
JP 2007-46867 A Japanese Patent No. 3507733 Japanese Patent No. 3305855 Japanese Patent No. 3855068 Japanese Patent Publication No. 7-72634

  As described above, in the natural gas liquefaction facility, since there is no facility that uses the cold generated along with vaporization in the vicinity of the vaporizer, most of the cold is discharged into seawater. On the other hand, as a technique used for an air conditioning system of a building or the like, an ice heat storage technique is known in which cold heat during cooling is stored in a heat storage tank in the form of slurry ice. As a method of generating slurry-like ice, a method is also known in which supercooled water is generated and then the supercooled state is released and ice making is made. In this supercooled water generated, it is discharged from the vaporizer. If the cold heat can be used, the cold heat discharged from the vaporizer can be effectively used.

  In addition, as described above, a technique is known in which warm heat is stored in a heat storage body, transported, and used in a remote place. However, this technology does not disclose or suggest a method for receiving cold heat, a method for storing and storing cold heat, a method for transporting cold heat, a method for receiving cold heat at a demand destination of cold heat, and the like. Therefore, in order to use cold heat at a remote place, it is necessary to develop a new technology capable of storing and transporting the cold heat discharged from the vaporizer.

  In view of the above problems, an object of the present invention is to provide a technique that can use cold heat discharged from a vaporizer that vaporizes a liquid in a remote place.

  In the present invention, in order to solve the above-mentioned problems, an ice manufacturing device that generates slurry-like ice using cold heat discharged from a vaporizer, and an ice transfer device that transfers ice generated by the ice manufacturing device It was decided to provide.

  Specifically, the present invention relates to a cold energy utilization system that uses cold energy discharged from a vaporizer that vaporizes a predetermined liquid, and includes supercooled water generated using the cold energy discharged from the vaporizer. Generated by the ice manufacturing apparatus up to a predetermined facility that uses the slurry-like ice, and an ice production device that generates slurry-like ice by releasing the supercooled state and a facility that is not adjacent to the vaporizer An ice conveying device for conveying the slurry-like ice formed.

In the ice manufacturing apparatus, supercooled water is generated using cold heat. The ice manufacturing apparatus of the present invention uses the cold discharged from the vaporizer as the cold used when generating this supercooled water. Cold heat is cold heat out of heat. That is, when heat is distinguished from hot heat and cold heat, cold heat is cold. A vaporizer is a device that vaporizes a liquid, and heat discharged from the vaporizer generally includes both hot and cold. However, since the present invention uses cold heat as described above, the vaporizer in the present invention corresponds to one that discharges cold heat. An example of the vaporizer that discharges cold heat is an apparatus that vaporizes ultra-low temperature liquid natural gas (for example, minus 162 ° C. in the case of LNG).

  The supercooling means a phenomenon that does not solidify even when the liquid is cooled past the freezing point and maintains the liquid state. Therefore, the supercooled water means water in a supercooled state, that is, water in a state of 0 ° C. or lower. Release of the supercooled state can be performed by applying a predetermined impact to the supercooled water. The method of giving an impact is not particularly limited, and any impact such as an impact caused by a drop, an impact caused by colliding with a plate, an impact caused by applying a vibration may be used. Ice generated by releasing the supercooled state of the supercooled water is slurry ice. Slurry ice is ice that is uniformly mixed with water in a fine granular form (sorbet). Such slurry-like ice can be circulated through general piping equipment and is also suitable for conveyance.

  Here, as described above, an object of the present invention is to provide a technology that can use the cold heat discharged from the vaporizer in a remote place. And according to the ice manufacturing apparatus mentioned above, the production | generation of slurry-like ice is attained using the cold heat discharged | emitted from a vaporizer. Accordingly, if the slurry-like ice can be conveyed, the cold heat discharged from the vaporizer can be used in a remote place. Therefore, in the present invention, in addition to the above-described ice manufacturing apparatus, an ice transport apparatus that transports slurry-like ice is provided.

  In the ice transport device, the ice generated by the ice manufacturing device is transported to a predetermined facility. The conveying means in the ice conveying device is not particularly limited, but is preferably capable of self-propelling. Examples of the self-propelled ice transport device include a vehicle including storage means. The predetermined facility is a facility that can use the slurry-like ice generated by the ice production device, such as a building equipped with an air conditioning system that enables cooling operation by storing the slurry-like ice in a heat storage tank. A facility is illustrated.

  According to the cold energy utilization system of the present invention described above, by providing the ice production device, it is possible to generate ice using the cold energy discharged from the vaporizer. Furthermore, according to the cold energy utilization system of this invention, it becomes possible to convey the ice produced | generated with the ice manufacturing apparatus by providing an ice conveyance apparatus. That is, it is possible to use the cold energy discharged from the vaporizer at a location away from the vaporizer.

  Furthermore, this invention is the ice manufacturing apparatus used for the cold utilization system mentioned above. That is, the present invention relates to a supercooling water generating unit that generates supercooling water using cold heat discharged from a vaporizer that vaporizes a predetermined liquid, and the supercooling water generated by the supercooling water generating unit. Generated by the ice generating means up to a predetermined facility that uses the slurry-like ice, and an ice generating means that generates slurry-like ice by releasing the supercooled state, and a facility that is not adjacent to the vaporizer. Supply means for supplying the slurry-like ice generated by the ice-generating means to an ice-conveying device that conveys the slurry-like ice.

  According to the present invention, by providing the supercooling water generating means, it is possible to generate supercooling water using the cold energy discharged from the vaporizer. Moreover, it becomes possible to cancel | release the supercooling state of supercooling water by providing an ice production | generation means, and to produce | generate slurry-like ice. Furthermore, by providing the supply means, it is possible to supply slurry-like ice to the ice transport means used in the above-described cold heat utilization system.

  In the ice manufacturing apparatus of the present invention, the supercooling water generating means cools the cooling medium used for generating the supercooling water to a predetermined temperature by the cooling heat discharged from the vaporizer. The supercooled water may be generated by cooling the water used for the supercooled water with a cooling medium.

According to the present invention, by using the cooling heat discharged from the vaporizer for cooling the cooling medium, the cooling means for cooling the cooling medium (brine) can be unnecessary or downsized than before, and It is possible to effectively use the cold heat discharged from the vaporizer that has been frequently discarded.

  Furthermore, this invention is an ice conveyance apparatus used for the cold utilization system mentioned above. That is, the present invention is supplied from an ice manufacturing device that generates slurry-like ice by releasing the supercooling state of the supercooling water generated by using the cold heat discharged from the vaporizer that vaporizes the predetermined liquid. The storage means for storing the slurry-like ice, and the storage means for storing the slurry-like ice up to a predetermined facility using the slurry-like ice, which is a facility not adjacent to the vaporizer. And an ice transport device provided with a moving means for transporting the ice.

  According to the present invention, by providing the storage means, it is possible to store the slurry-like ice supplied from the above-described ice manufacturing apparatus. Moreover, a storage means can be conveyed by providing a moving means. In other words, according to the present invention, since the storage means can be transported in a state where the slurry ice is stored in the storage means, the slurry ice generated using the cold heat discharged from the vaporizer is removed. It can be transported to a remote location.

  The capacity that can be stored at one time by the storage means is not particularly limited, and may be appropriately determined as a capacity that can be transported by the moving means. It is preferable that the moving means can be self-propelled, for example, including a wheel and a drive source. In addition, since a storage means stores slurry-like ice, it is preferable to have a cold insulation function.

  In addition, the ice transport device of the present invention further includes a moisture amount reducing means for reducing the amount of moisture contained in the slurry-like ice supplied from the ice making device, and the storage means is configured to provide moisture by the moisture amount reducing means. Slurry ice with a reduced amount may be stored.

  Slurry ice stored in the storage means is ice in which fine granular ice and water are uniformly mixed as described above, and contains a large amount of water. On the other hand, since the capacity (volume) that can be stored by the storage means is constant, if it can be stored in a state where the water content is reduced and the proportion of ice is increased, a large amount of ice can be stored at one time. . That is, even if the storage means have the same capacity, it is possible to transport a large amount of ice at a time by reducing the amount of water. The present invention has been made paying attention to such points, and according to the present invention, it is possible to reduce the amount of water contained in slurry-like ice supplied from an ice manufacturing apparatus. As a result, more ice can be transported in a single transport. The moisture amount reducing means can be constituted by a filter, for example.

  As described above, it is possible to transport more ice at a time by reducing the amount of water. However, the fluidity of slurry-like ice with a reduced amount of water is assumed to deteriorate. Slurry ice enables cooling of the cooling medium and is characterized by its excellent fluidity. Therefore, when it is predicted that the fluidity is deteriorated by reducing the water content, it is preferable to restore the fluidity.

  Therefore, the present invention may be configured to further include fluidity recovery means in addition to the above-described configuration of the ice transport device. More specifically, the ice transport device according to the present invention supplies water to the slurry-like ice stored in the storage means and reduced in water content by the water content reduction means. A fluidity recovery means for recovering the fluidity of the slurry-like ice with reduced slag may be further provided. According to the present invention, since water is newly added to the slurry-like ice whose water content has been reduced by the fluidity recovery means, the fluidity of the slurry-like ice can be recovered.

  Moreover, the ice manufacturing apparatus of this invention may be further provided with the feed means which is arrange | positioned inside the said storage means and sends out the slurry-like ice stored in this storage means to the exterior. By providing the feeding means, it becomes possible to feed out the slurry-like ice stored in the storage means to the outside. As a result, the slurry-like ice stored in the storage means can be supplied to a predetermined facility where the slurry-like ice can be used.

  Further, in the ice manufacturing apparatus of the present invention, the storage means has a substantially cylindrical space for storing the slurry-like ice, and the feeding means rotates in the axial direction of the cylinder while rotating on the inner surface of the cylinder. The slurry-like ice may be sent out by generating a spiral flow that proceeds at a predetermined speed. According to the present invention, it is possible to effectively send out slurry-like ice to the outside. Further, the spiral flow has an effect of mixing in addition to the effect of sending out. Therefore, during transportation, it is assumed that the slurry-like ice stored in the storage means is separated into water and ice. However, according to the present invention, even if water and ice are separated during transportation, It becomes possible to send out to the outside after uniformly mixing. Furthermore, when water is newly added by the fluidity recovery means, it is possible to uniformly mix the newly added water and the slurry-like ice stored in the storage means.

  In addition, this invention can be made into the method of implement | achieving one of the functions mentioned above. Therefore, the present invention is a method of using cold heat discharged from a vaporizer that vaporizes a predetermined liquid, wherein the supercooled state of the supercooled water generated using the cold heat discharged from the vaporizer is changed. By releasing the slurry-like ice, the vaporization is performed by transporting the produced slurry-like ice to a predetermined facility that is not adjacent to the vaporizer and uses the slurry-like ice. This is a cold energy utilization method utilizing the cold energy discharged from the apparatus.

  ADVANTAGE OF THE INVENTION According to this invention, the technique which can utilize the cold heat discharged | emitted from the vaporizer which vaporizes a liquid in a remote place can be provided.

Next, an embodiment of the cold energy utilization system of the present invention will be described based on the drawings. In the embodiment described below, LNG for vaporizing LNG (Liquefied Natural Gas)
The case where the cold energy discharged | emitted from G vaporizer is utilized is demonstrated. However, the present invention is not limited to the following. The cold energy utilization system of the present invention can be applied to various facilities that generate cold energy among facilities that change phase from liquid to gas.

<Configuration>
FIG. 2 shows the configuration of the cold energy utilization system of the present embodiment. As shown in the figure, the cold utilization system of the present embodiment includes an ice manufacturing device 1 and an ice transport vehicle (corresponding to the ice transport device of the present invention) 2. According to the cold energy utilization system of the present embodiment, slurry ice is generated using the cold heat discharged from the LNG vaporizer 3 by the ice production device 1, and the generated slurry ice is generated by the ice transport vehicle 2. Then, it is transported to a predetermined facility equipped with the ice heat storage tank 4. Therefore, it is possible to effectively use the cold discharged from the LNG vaporizer 3 in a remote place. Details will be described below.

[LNG vaporizer]
First, the LNG vaporizer 3 that discharges the cold energy used in the cold energy utilization system of the present embodiment will be described. The LNG vaporizer 3 vaporizes LNG supplied from the LNG tank 5 that stores LNG. When LNG is liquefied, its volume becomes approximately 1/60 of the volume at the time of gas, so it is generally cooled to minus 162 ° C. in the production area and transported by sea. The LNG tank 5 normally stores LNG thus transported by sea. L
The NG tank 5 is often installed in a receiving base provided in the coastal area, and the LNG vaporizer 3 is often provided in the coastal area accordingly. Therefore, the ice manufacturing apparatus 1 of the present embodiment can be suitably used for the LNG vaporizer 3 installed in the coastal area as described above. However, the LNG vaporizer 3 may be provided in a base other than the coastal part called a satellite base in addition to the one provided in the receiving base provided in such a coastal part. Therefore, the ice manufacturing apparatus 1 may be applied to the LNG vaporizer 3 provided outside the coastal area.

  The LNG vaporizer 3 and the LNG tank 5 are connected by an LNG transfer pipe 6. Further, the LNG transport pipe 6 is provided with a pump 7 for pumping LNG in the middle of the flow path. The LNG stored in the LNG tank 5 is pumped to the LNG vaporizer 3 as necessary.

  The LNG vaporizer 3 is provided with a plurality of heat transfer tubes 31. Moreover, the LNG vaporizer 3 and the ice manufacturing apparatus 1 are connected by the brine conveyance pipe | tube 16 (16a, 16b). The brine transport pipe 16 includes a cooling brine transport pipe 16a through which the brine cooled using the cold heat discharged from the LNG vaporizer 3 flows, and a pre-cooling brine through which the uncooled brine fed into the LNG vaporizer 3 flows. And a transport pipe 16b. Brine supplied by the pre-cooling brine transport pipe 16b is discharged into the LNG vaporizer 3 through the spray nozzle 32, and the LNG passes through the heat transfer pipe 31, thereby the brine discharged into the LNG vaporizer 3 and Heat exchange (heating for LNG) is performed between the two, and LNG is vaporized. The vaporized LNG is used for predetermined applications such as fuel for thermal power plants and city gas. On the other hand, the brine discharged into the LNG vaporizer 3 is cooled by exchanging heat with the LNG. That is, the brine is cooled to a predetermined temperature (for example, minus 3 ° C.) using heat of vaporization generated when LNG is vaporized, in other words, cold heat (energy) discharged from the LNG vaporizer 3. The cooled brine is sent to the ice manufacturing apparatus 1 through the cooling brine transport pipe 16a and used for generating supercooled water. At this time, the cooled brine is heated to around 0 ° C. The details of the ice manufacturing apparatus 1 will be described later.

  In addition, as the conventional general LNG vaporizer 3, the technique which vaporizes LNG by heat-exchanging seawater and LNG is known. However, in such a conventional technique, the seawater cooled by exchanging heat with LNG is discharged into the sea as it is (see FIG. 1). Therefore, the cool heat discharged from the LNG vaporizer 3 is effectively used. The development of technology that can be used in the future was desired. In the present invention, the cold energy that has been conventionally discharged is used for the generation of supercooled water, so that the cold energy can be effectively used.

[Ice production equipment]
Next, the ice manufacturing apparatus 1 which produces | generates slurry-like ice using the cold heat discharged | emitted from the said LNG vaporizer 3 is demonstrated. The ice manufacturing device 1 is provided with a supercooler 11, a supercooling release device 12, and a cold water tank 13. The cold water tank 13 is a buffer tank that temporarily receives water discharged from an ice transport vehicle 2 described later. The supercooler 11 and the cold water tank 13 are connected by a water transport pipe 14. The supercooler 11 and the supercooling release device 12 are connected by a supercooling water transport pipe 15.

The supercooler 11 can be, for example, a plate heat exchanger or a shell and tube heat exchanger. The water flowing through the heat transfer tube of such a heat exchanger is cooled to a predetermined temperature (for example, minus 2 ° C.) by performing heat exchange with the cooled brine flowing through the cooling side flow path. Is done. The cooled brine is configured to maintain a predetermined temperature by circulating. The cooled brine is supplied via the cooling brine transport pipe 16a. That is, a pump 7 is provided in the middle of the flow path of the cooling brine transport pipe 16 a, and the brine cooled by using the cold heat of the LNG vaporizer 3 is cooled by the pump 7 on the cooling side flow path of the subcooler 11. And used to produce supercooled water. Supercooler 1
The configuration of 1 is not limited to the above. Any structure that can exchange heat between brine and water may be used, and various known techniques can be applied.

  The supercooling cancellation device 12 cancels the supercooling state of the supercooling water supplied via the supercooling water transport pipe 15. That is, in the supercooling release device 12, ice (slurry ice) that is uniformly mixed with water in fine granular form (sherbet) is generated by impacting the supercooled water. In addition to the supercooling active cancellation system which cancels a supercooling state by giving an ultrasonic transducer | vibrator, the supercooling cancellation | release apparatus 12 is a collision drop system which cancels a supercooling state using the impact at the time of dropping For example, known techniques can be employed as appropriate. For example, as the supercooling release device 12, a release device described in Japanese Patent No. 3855068 by the present applicant can be used. Moreover, it is only necessary to provide a release propagation preventer described in Japanese Patent Application Laid-Open No. 2003-106716 filed by the same applicant on the upstream side of the release device, whereby a stable ice generation operation can be performed.

  One end of an ice transport pipe 17 that transports slurry-like ice is connected to the supercooling release device 12. The other end of the ice transport pipe 17 can be connected to the ice receiving port 21 of the ice transport vehicle 2. Thereby, slurry-like ice can be supplied to the ice transport vehicle 2. Note that, for example, in the case of a collision drop method using fall energy, the supercooling release device 12 may be omitted from the ice manufacturing device 12. That is, the supercooling water conveyance pipe 15 is extended to the ice conveyance vehicle 2 instead of the ice conveyance pipe 17. In this case, the supercooled water transported by the supercooled water transport pipe 15 is released from the supercooled state by the energy when falling into the ice transport vehicle 2, and ice is generated in the ice transport vehicle 2. Similarly, the supercooling release device 12 of the ice manufacturing device 12 may be omitted, and the ice conveyance vehicle 2 may be provided with a supercooling release device such as a collision plate or an ultrasonic vibrator. Also in this case, the supercooling water transport pipe 15 may be extended to the ice transport vehicle 2. Details of the ice transport vehicle 2 will be described later.

  The water in the cold water tank 13 is pumped to the supercooler 11 by the pump 7a. The slurry-like ice generated by the supercooling release device 12 is guided to the ice transport vehicle 2 by a pump 7b provided on the downstream side of the supercooling release device 12. Therefore, the pump 7b functions as the supply means of the present invention. Tap water can be used as the water used when generating the supercooled water, but pure water may be used as water that does not contain impurities. In the present embodiment, the cold water tank 13 and the ice transport vehicle 2 are connected by the water transport pipe 14. Thereby, water accumulated in the ice transport vehicle 2 (water that has passed through the filter 26 in the ice transport vehicle 2 described later) can be reused as supercooled water. However, a one-pass system in which water is supplied from a water pipe in a base (receiving base or satellite base) to the supercooler 11 to make ice and stored in an ice storage vehicle 2 that has not stored ice may be used.

  In the ice manufacturing apparatus 1 described above, when the ice manufacturing apparatus 1 is provided in the coastal area, it is preferable that at least a member that comes into contact with the outside air is made of a material corresponding to salt damage such as a resin or a resin-coated material. . On the other hand, when the ice manufacturing apparatus 1 is provided in a so-called satellite base, the ice manufacturing apparatus 1 can be made of a general steel material.

[Ice transport vehicle]
Next, the ice transport vehicle 2 that transports slurry-like ice will be described. The ice transport vehicle 2 corresponds to the ice transport device of the present invention, and transports the slurry-like ice generated by the ice manufacturing device 1. The ice transport vehicle 2 includes an ice storage tank 22 and a vehicle main body 23. The vehicle main body 23 (corresponding to the moving means of the present invention) is provided with a configuration generally required for a vehicle such as a drive source and wheels. In addition, the ice conveyance vehicle 2 in this embodiment is integrally formed with the vehicle main body 23 and the ice storage tank 22 and corresponds to a so-called tank lorry. However, the ice conveyance vehicle 2 is not limited to this. As for the ice conveyance vehicle 2, the load (ice storage tank 22 in this embodiment) and the vehicle main body 23 may be separable like a container vehicle, for example. Moreover, the vehicle main body 23 may be a tow type, and the form is not specifically limited. Further, the ice transport vehicle 2 may be, for example, a railway vehicle.

  The ice storage tank 22 stores the slurry-like ice generated by the ice making device 1. Here, FIG. 3 shows a configuration of the ice transport vehicle 2. As shown in the figure, the ice transport vehicle 2 includes a vehicle main body 23 and an ice storage tank 22, and the ice storage tank 22 includes a tank main body 24, an ice receiving port 21, an ice ejection nozzle 25, and the like. A separation filter 26, an ice discharge port 27, and a water discharge port 28 are formed.

  The tank body 24 stores slurry-like ice generated by the ice manufacturing device 1. Slurry ice has a predetermined temperature (for example, 0 ° C.), and this temperature needs to be maintained during conveyance. Therefore, the tank body 24 is preferably provided with a cold insulation device, a heat insulating layer that covers the tank body 24, and the like. In addition, the cold insulation apparatus should just be an apparatus which can maintain predetermined | prescribed temperature of slurry-like ice, and should just apply and apply a well-known technique suitably. Although the shape of the tank main body 24 is not specifically limited, For example, it can be set as a true cylinder in an ellipse. The material of the tank body 24 is not particularly limited, and a steel plate, aluminum, stainless steel or the like can be used.

The capacity of the tank body 24 is not particularly limited, either, the capacity of the ice heat storage tank 4 installed in a predetermined facility at the transport destination, the consumption amount of slurry-like ice at the predetermined facility at the transport destination, or the transport What is necessary is just to design suitably according to a route etc. For example, when the capacity of the tank main body 24 is 20 t, it is possible to transport a quantity of cold heat equivalent to 300 Rth as shown in Equation 2 by one transport. In a building of about 10,000 m ² , it is said that the amount of cooling required per day is 3,000-45,000 Rth. Therefore, according to the ice transport vehicle 2 having a capacity of the tank main body of 20 t, it is possible to cover the amount of cold heat necessary for such a building of about 10,000 m ² with 10 to 15 units.
20 (ton) × 80 (Mcal / ton) × (0.6 / 3.024 (kcal / Rt)) ≈300 Rth Equation 2

  The ice receiving port 21 receives the slurry-like ice generated by the ice making device 1. In the present embodiment, the ice receiving port 21 is provided on the upper portion of the tank body 24. The ice receiving port 21 preferably has an inner diameter that is the same as or larger than the outer shape of the ice transport pipe 17. The ice receiving port 21 may be provided with a connecting part for detachably connecting to the end of the ice transport pipe 17. Thereby, when supplying the slurry-like ice, the slurry-like ice can be stably supplied to the inside of the tank body 24 by setting the connected state. In addition, the ice conveyance pipe | tube 17 and the ice receiving port 21 of the ice manufacturing apparatus 1 can be connected, for example with flexible pipes, such as a bellows pipe, and detachable fixing tools, such as a one-touch joint.

  The ice ejection nozzle 25 ejects slurry-like ice received from the ice receiving port 21 into the tank body 24. In the present embodiment, one unit is provided on the upper portion of the tank main body 24, but a plurality of units may be arranged along the longitudinal direction of the tank main body 24, for example. According to the ice ejection nozzle 25, slurry-like ice can be uniformly distributed in the tank body 24. However, a separate distributor may be installed in the tank body 24. In this case, the ice jet nozzle 25 may be omitted, and slurry-like ice may be dropped from the ice receiving port 21.

The separation filter 26 corresponds to the moisture content reducing means of the present invention, and reduces the moisture content contained in the slurry-like ice. The separation filter 26 is disposed at the lower part of the tank body 24 and is formed of a mesh smaller than the ice particles contained in the slurry-like ice. Therefore, since only water contained in the slurry-like ice passes through this mesh, it becomes possible to separate the slurry-like ice into water and ice. That is, the amount of water contained in the slurry-like ice can be reduced. As a result, the percentage of ice in the slurry-like ice stored in the tank body 24 can be increased, and a large amount of ice can be stored at one time. In addition to the above, the separation filter 26 also has a function of preventing ice precipitation and in-pipe freezing in the system of the ice manufacturing apparatus 1, particularly in the supercooler 11. That is, when ice particles are contained in the water supplied to the subcooler 11, ice may be generated using the ice particles as a nucleus. However, such a situation can be avoided by providing the separation filter 26. Note that filter switching means including a partition plate or the like may be provided above the separation filter 26. Thereby, only when the partition plate is opened, the slurry-like ice can be separated into water and ice.

  The ice discharge port 27 is an opening for discharging slurry-like ice stored in the tank body 24 to the outside. The ice discharge port 27 is formed with a lid, an open / close door and the like, and the ice discharge port 27 is closed except when discharging slurry-like ice to the outside. When the slurry-like ice is conveyed to a predetermined facility, the ice discharge port 27 is connected to the ice heat storage tank 4 provided in the predetermined facility to discharge the slurry-like ice. That is, the ice discharge port 27 and the ice heat storage tank 4 are connected by the ice transfer pipe 17a to discharge the slurry-like ice (see FIG. 2). The ice discharge port 27 can be opened before or after the ice transport pipe 17a is connected. For example, when the heat storage tank 4 is positioned lower than the ice transport vehicle 2, the ice discharge port 27 is opened after the ice transport pipe 17a is connected, and slurry-like ice is discharged using gravity drop. Further, when the distance between the ice transport vehicle 2 and the ice heat storage tank 4 is long, it may be pumped by a pump. In this case, the ice discharge port 27 may be opened before or after the ice transport pipe 17a is connected. . In addition, it is preferable that conveyance pipe | tubes, such as the above-mentioned ice conveyance pipe | tube 17, including the ice conveyance pipe | tube 17a, are set as the structure which has a cold insulation function, for example by forming a heat insulation layer around.

  The water discharge port 28 discharges the water separated by the separation filter 26. The separated water is circulated to the supercooler 11 through the cold water tank 13, for example. In addition, since the water which passed the separation filter 26 is cold water, it can utilize as water for producing | generating supercooled water, without cooling again.

  The ice transport vehicle 2 may be provided with a swirl flow rotor 29 as means for sending slurry-like ice stored in the tank body 24 to the outside. Here, FIG. 4 shows the ice transport vehicle 2 provided with the swirl flow rotor 29. As shown in the figure, a rotating shaft 29a is formed along the longitudinal direction of the tank body 24, and spiral wings 29b are formed around the rotating shaft 29a. According to such a swirl flow rotor 29, a spiral flow can be generated inside the tank body 24, and slurry-like ice stored inside the tank body 24 can be sent to the outside. Become. The swirl flow rotor 29 also has a stirring function. Therefore, during ice storage and transportation, the water and ice contained in the slurry-like ice stored inside the tank body 24 can be uniformly mixed with the lid and the door closed. The formed slurry-like ice can be sent out to the outside. In addition, when the ice conveying vehicle 2 is provided with the swirling rotor 29 and other means for pushing out the slurry-like ice, the slurry-like ice can be sent to the outside using the propulsive force of the swirling rotor 29 or the like. . Therefore, for example, even when there is no difference in height between the ice transport vehicle 2 and the ice heat storage tank 4 or when the distance between the ice transport vehicle 2 and the ice heat storage tank 4 is relatively long, the pump of the ice transport pipe 17a. Can be omitted.

[Ice storage tank]
Next, the ice heat storage tank 4 for storing slurry-like ice transported by the ice transport vehicle 2 will be described. The ice heat storage tank 4 is installed in an underground slab of a building such as a building, for example. The ice heat storage tank 4 is connected to an air conditioning system such as a building, and the stored slurry-like ice is appropriately defrosted and used as cold heat during cooling of the air conditioning system. In addition, conventionally, an ice heat storage system (ice heat storage system) that stores cold heat during cooling in the state of ice in a heat storage tank is known and is widely used. Therefore, the slurry-like ice transported by the ice transport vehicle 2 can be stored using the existing ice heat storage tank.

  In addition, in the conventional ice heat storage system, in addition to the ice heat storage tank 4, a supercooler and the like for generating ice stored in the ice heat storage tank 4 are also provided. Water cooling (supercooler), ice generation By repeating the process of water and ice separation, slurry-like ice is continuously generated and stored in the ice heat storage tank. Here, FIG. 5 shows an example of an existing ice heat storage system.

  As shown in the figure, the existing ice heat storage system 200 includes a refrigerator 201 that cools brine to a predetermined temperature (for example, minus 6 ° C.), and a predetermined temperature (for example, minus 2 ° C.) by cooling water. A supercooler 202 for generating a supercooled water, a releaser 203 for changing the phase of the supercooled water into ice and water to generate slurry-like ice and guiding it to the ice transport pipe (supercooling release for canceling the supercooled state) An ice storage pipe 204 for sending slurry-like ice into the ice heat storage tank, an ice storage nozzle 205 for ejecting the slurry-like ice into the ice heat storage tank 4, and an ice heat storage for storing the slurry-like ice The water in the tank 4 and the ice storage tank 4 is pumped to the supercooler 202 when storing heat, and the chilled water circulation pump 208 that pumps the water to the heat exchanger 206 when radiating heat. Nucleation unit 209 that separates into ice and ice, ice nucleation separation A chilled water feed pipe 209a including a water inlet provided in or inside the knit 209, an ice-melting heat exchanger 206 for supplying the cold side of the ice heat storage tank 4 to the secondary side (air-conditioning system) at the time of thawing, circulating water Are provided with a preheater 211 that melts the fine ice and an ice melting nozzle 210 that ejects water when the ice is melted to efficiently melt the ice.

  In the existing ice heat storage system 200 as described above, the brine is cooled by the refrigerator 201. The refrigerator 201 is adapted to the peak load that requires the most cold in the building in order to realize a stable supply of cold. It is necessary to select the size of the equipment. However, operation at high load is not so frequent throughout the year, and there is a problem that operation efficiency is poor when a large refrigerator is introduced.

  Therefore, if the ice in the slurry state can be transported by the ice transport vehicle 2 described above, it is possible to compensate for the cold energy at the time of high load. As a result, the refrigerator 201 of the ice heat storage system 200 is not the total cooling load, but the size of the device in accordance with the difference from the cold heat from the slurry-like ice conveyed by the ice conveying vehicle 2, that is, the insufficient load. Can be selected. That is, the refrigerator 201 can be downsized, and the investment efficiency of the building can be improved. For example, in the morning, the water in the ice heat storage tank 4 is collected and transported to the ice manufacturing apparatus 1 to generate slurry-like ice, and the generated slurry-like ice is transported by the ice transport vehicle 2 to generate ice heat storage. What is necessary is just to repeat a fixed cycle, such as supplying to the tank 4. FIG. The conveyed slurry-like ice may be directly supplied into the ice heat storage tank 4 through the ice transfer pipe 17a as shown in FIG. 2, and may be supplied to the ice transfer pipe 204 of the existing ice heat storage system 200, for example. A branch pipe 213 may be provided, and an ice carrier pipe 17a may be connected to the end of the branch pipe 213 to supply slurry-like ice.

<Modification 1>
The ice transport vehicle 2 described above may further be provided with a water supply port corresponding to the fluidity recovery means of the present invention. The ice transport vehicle 2 described above has the separation filter 26, so that the amount of water contained in the slurry-like ice stored in the tank body 24 can be reduced. As a result, the ice transport vehicle 2 is stored in the tank body 24. The percentage of ice in the slurry-like ice can be increased, and more ice can be stored at one time. However, in this case, it is assumed that the fluidity that is inherently characteristic of slurry-like ice is reduced. Therefore, the ice transport vehicle 2 according to the modified example has a configuration in which water can be newly supplied to the inside of the tank body 24 by disposing a water supply port. The water supply port can be provided in the upper part of the tank body 24, but may be shared with the ice receiving port 21, for example. Thereby, it is possible to reduce the number of parts used in the ice transport vehicle 2.

In addition, the water stored in the ice thermal storage tank 4 can be utilized for the water supplied from a water supply port, for example. That is, the water separated from the slurry-like ice usually accumulates in the lower part of the ice heat storage tank 4 and may be used. FIG. 6 shows an ice transport vehicle 2 having a water supply port (shared with the ice receiving port 21) and an ice heat storage tank. As shown in the figure, the water supply port and the ice heat storage tank 4 may be connected by a water supply pipe 18 and the water in the ice heat storage tank 4 may be pumped by the pump 9. If it is the water in the ice thermal storage tank 4, it is not necessary to cool again and can be used suitably as water for recovering fluidity.

  In addition, as shown in FIG. 6, when the distance between the ice transport vehicle 2 and the ice heat storage tank 4 is relatively long, even if the swirl flow rotor 29 is provided in the ice transport vehicle 2, the ice transport A pump 9a as an ice pressure feeding means may be arranged in the middle of the flow path of the ice transport pipe 17 that connects the vehicle 2 and the ice heat storage tank 4. As the pump 9a, a piston type pump called a plunger pump can be used. As a result, even when the distance between the ice transport vehicle 2 and the ice heat storage tank 4 is relatively long, the slurry-like ice stored in the ice transport vehicle 2 is stable with respect to the ice heat storage tank 4. It becomes possible to supply to. In addition, for supplying the slurry-like ice to the ice heat storage tank 4, for example, a branch pipe 213 is provided in the ice transport pipe 204 downstream of the releaser 203 shown in FIG. 5, and the slurry-like ice is delivered to the inlet opening thereof. May be.

<Effect>
According to the cold energy utilization system of the present embodiment described above, the cold energy discharged from the LNG vaporizer 3 can be used as cold energy for cooling a remote building or the like, thereby promoting energy saving and reducing CO ₂ . You can plan. That is, by providing the ice manufacturing apparatus 1, supercooled water is generated using the cold heat discharged from the LNG vaporizer 3, and further, the supercooled state of the supercooled water is released to remove slurry ice. Can be generated. Moreover, by providing the ice conveyance vehicle 2, the slurry-like ice produced | generated by the ice manufacturing apparatus 1 can be conveyed to a predetermined | prescribed facility (the ice thermal storage tank 4 provided in the building etc.). The slurry-like ice stored in the ice heat storage tank 4 can be appropriately used as cooling heat in the air conditioning system.

  Note that the slurry-like ice stored in the ice heat storage tank 4 may be entirely supplemented by ice conveyed by the ice conveyance vehicle 2. That is, when all of the slurry-like ice stored in the ice heat storage tank 4 is supplemented by the ice transport vehicle 2, a building for generating ice such as a supercooler is not provided on the building side where the ice heat storage tank is installed. May be. Therefore, the facility on the building side can be reduced in size.

  As mentioned above, although preferred embodiment of this invention was described, the cold utilization system of this invention is not restricted to these, It can include these combinations as much as possible.

An outline of a conventional system including a vaporizer for vaporizing LNG is shown. The structure of a cold energy utilization system is shown. The structure of an ice conveyance vehicle is shown. Fig. 2 shows an ice carrier vehicle provided with a swirl rotor. An example of an existing ice heat storage system is shown. The ice conveyance vehicle which has a water supply port, and an ice thermal storage tank are shown.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Ice manufacturing apparatus 2 ... Ice conveyance vehicle 3 ... LNG vaporizer 4 ... Ice thermal storage tank 7 ... Pump 11 ... Supercooler 12 ... Supercooling release device 13 ... Cold water tank 22 ... Ice storage tank 23 ... Vehicle body

Claims (9)

A cold energy utilization system that utilizes cold energy discharged from a vaporizer that vaporizes a predetermined liquid,
An ice production device for producing slurry-like ice at the time of production by releasing the supercooled state of the supercooled water produced using the cold energy discharged from the vaporizer;
A facility which is not adjacent to the vaporizing device, to a predetermined facility that utilizes the ice, and a ice conveying device for conveying the ice,
The ice conveying device is:
Storage means for storing ice supplied from the ice making device;
Moving means for transporting the storage means storing the ice to the predetermined facility;
Water content reducing means for separating water from ice supplied from the ice making device so that the storage means can store more ice, and reducing the amount of water contained in the ice;
Discharging means for discharging the water separated by the moisture amount reducing means,
Cold energy utilization system.   The ice conveying device is:
  The fluidity recovery means for recovering the fluidity of ice by newly supplying water to the ice stored in the storage means and reduced in water content by the moisture content reduction means. Cold energy utilization system.   The ice conveying device is:
  The cold energy utilization system according to claim 1 or 2, further comprising a feeding unit that is disposed inside the storage unit, stirs the ice stored in the storage unit, and sends the stirred ice to the outside. Supplied from an ice manufacturing device that generates slurry-like ice at the time of generation by releasing the supercooled state of the supercooled water generated by using the cold heat discharged from the vaporizer that vaporizes the predetermined liquid Storage means for storing ice ;
A moving means for transporting the storage means to a predetermined facility that is not adjacent to the vaporizer and uses the ice ;
From the ice supplied from the ice making device so that the storage means can store more ice
Water content reducing means for separating water and reducing the amount of water contained in the ice;
Discharging means for discharging water separated by the moisture amount reducing means ,
Ice transport device. Wherein stored in the storage means, further comprising a fluidity recovery means for recovering the fluidity of ice by supplying new water to moisture amount reduced slurry of ice by the water content reduction means, claim 4. The ice conveying device according to 4 . The ice transport device according to claim 4 or 5 , further comprising a feeding unit disposed inside the storage unit , stirring the ice stored in the storage unit, and feeding the stirred ice to the outside. The storage means has a substantially cylindrical space for storing the slurry-like ice,
The ice according to claim 6 , wherein the feeding means feeds the slurry-like ice to the outside by generating a spiral flow that travels on the inner surface of the cylinder at a predetermined speed in the axial direction of the cylinder. Conveying device. A method of using cold energy discharged from a vaporizer that vaporizes a predetermined liquid,
Producing slurry-like ice at the time of production by releasing the supercooled state of the supercooled water produced using the cold heat discharged from the vaporizer,
A facility which is not adjacent to the vaporizing device, to a predetermined facility that utilizes the ice, conveying the ice,
In the transport, water is separated from the transported ice so that more ice can be transported, the amount of water contained in the ice is reduced, the separated water is discharged, and the ice is transported.
How to use cold energy.   In the conveyance, water is newly supplied to the ice with reduced water content to restore the ice fluidity.
The cold energy utilization method according to claim 8.

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