CN110966815A - High-efficient cold-storage device of LNG - Google Patents
High-efficient cold-storage device of LNG Download PDFInfo
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- CN110966815A CN110966815A CN201911278753.8A CN201911278753A CN110966815A CN 110966815 A CN110966815 A CN 110966815A CN 201911278753 A CN201911278753 A CN 201911278753A CN 110966815 A CN110966815 A CN 110966815A
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- lng
- secondary refrigerant
- shell
- solution pump
- cold storage
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D3/00—Devices using other cold materials; Devices using cold-storage bodies
- F25D3/10—Devices using other cold materials; Devices using cold-storage bodies using liquefied gases, e.g. liquid air
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B27/00—Machines, plants or systems, using particular sources of energy
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D23/00—General constructional features
- F25D23/06—Walls
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D29/00—Arrangement or mounting of control or safety devices
- F25D29/001—Arrangement or mounting of control or safety devices for cryogenic fluid systems
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- Mechanical Engineering (AREA)
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- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Filling Or Discharging Of Gas Storage Vessels (AREA)
Abstract
The invention relates to a high-efficiency cold accumulation device of LNG, which is characterized in that: the cold storage device comprises a shell, cold storage materials, an LNG solution pump, an LNG inlet valve and an LNG outlet valve, wherein a plurality of layered shells which are mutually communicated are arranged in the inner cavity of the shell, channel ports which are mutually communicated are arranged on the upper portions of the layered shells, the cold storage materials are arranged in the inner cavity formed by the layered shells, hollow channels are arranged in the cold storage materials, each hollow channel is connected end to form a through channel, each through channel is respectively connected with a refrigerant solution pump and a refrigerant control valve, the bottom of the innermost layered shell is provided with an LNG inlet, the LNG inlet is connected with the LNG solution pump and the LNG inlet valve, the side wall of the bottom of the shell is provided with an LNG outlet, and the LNG outlet is connected. Has the advantages that: the invention can realize the high-efficiency storage of the cold energy contained in the LNG in order to effectively utilize the high-quality cold energy resource contained in the LNG.
Description
Technical Field
The invention belongs to the field of low-temperature engineering, and particularly relates to an efficient cold accumulation device for LNG.
Background
Liquefied Natural Gas (LNG) is a clean energy containing a large amount of cold energy, and currently, LNG is increasingly used and paid attention to. In the related utilization mode of the LNG, in the process of delivering the LNG to a user for combustion or in the aspect of using the LNG as power fuel for vehicles such as vehicles after LNG processing, firstly, the LNG is subjected to gasification processing, and the LNG is converted into a gaseous state for reuse, because the LNG has an extremely low temperature, which reaches about-162 ℃, and the temperature during gaseous state utilization is far higher than the temperature, huge cold energy is contained in the change stage, and if the part of cold energy cannot be well utilized, a large resource waste phenomenon is often caused.
In the process of utilizing LNG gasification, due to the ultra-low temperature characteristic of LNG, if heat exchange is directly carried out through heat exchange equipment, serious damage is often caused to the heat exchange equipment, and the heat exchange equipment cannot normally work; among the known devices that can utilize phase change cold storage, some cold storage devices can only meet short-term cold supply work. Meanwhile, in the case of a vehicle using LNG as a power fuel, due to the operating conditions of the vehicle, the vaporization of LNG is not continuous, which is disadvantageous in the case of an LNG refrigerator-freezer that requires temperature regulation and continuous supply of cold.
The cold energy recycling of LNG vaporization is a topic worth discussion and practice. Patent document No. 209706401U discloses an LNG cold supply adaptive system with a cold accumulation device, which is characterized by comprising an upstream LNG vaporization unit and a transduction unit, wherein the upstream LNG vaporization unit is connected with an LNG storage tank, an LNG pump, an LNG control valve, and an inlet a and an outlet b of a first heat exchanger through pipelines to form a vaporization loop; the energy conversion unit is formed by connecting an outlet c of the first heat exchanger, an inlet e and an outlet f of the second heat exchanger, a secondary refrigerant high-temperature storage tank, a secondary refrigerant pump and an inlet d of the first heat exchanger in sequence through pipelines to form a circulation loop; the first heat exchanger is used for transferring cold energy between cold energy released by LNG gasification and secondary refrigerant; the second heat exchanger is used for transferring cold energy between the cooled secondary refrigerant and a cold phase of a downstream cold utilization system; the energy conversion unit further comprises a cold accumulation assembly, the cold accumulation assembly is formed by connecting a low-temperature secondary refrigerant inlet valve, a secondary refrigerant low-temperature storage tank and a low-temperature secondary refrigerant outlet valve through pipelines in sequence to form a cold accumulation branch, the inlet end of the cold accumulation branch is connected to the pipeline between the outlet c of the first heat exchanger and the inlet e of the second heat exchanger, and the outlet end of the cold accumulation branch is connected to the pipeline between the outlet of the secondary refrigerant high-temperature storage tank and the secondary refrigerant pump. Patent document publication No. 103017434a discloses a cold-storage device supporting with LNG gasification heat transfer system, LNG gasification heat transfer system includes that LNG enters the mouth, low temperature stop valve a, plate heat exchanger, low temperature stop valve b, empty temperature vaporizer and LNG export and through pipeline series connection, is equipped with temperature sensor on plate heat exchanger and low temperature stop valve b's connecting tube, is equipped with low temperature regulating valve, its characterized in that on the pipeline parallelly connected with plate heat exchanger and low temperature stop valve b's connecting tube: the cold accumulation device comprises a cold accumulation pool and a circulating water pump, and forms a circulating pipeline with a heat exchange tube in the plate heat exchanger through a pipeline, and the cold accumulation pool is provided with a circulating cold liquid inlet and a circulating cold liquid outlet. Patent document publication No. 204895033U discloses a liquefied natural gas vehicle cold energy recovery air conditioning system, its characterized in that: the cold energy recovery and heat storage device comprises a gas cylinder, a cold energy recovery exchanger, a water pump, a fan heater assembly, a cold storage device, a heater and an engine; the gas cylinder is connected with the gas inlet end of the cold energy recovery exchanger; the water pump is connected with the water inlet end of the cold energy recovery exchanger; the cold accumulation device is connected with the water outlet end of the cold energy recovery exchanger, and the heater is connected with the air outlet end of the cold energy recovery exchanger; one end interface of the fan heater assembly is connected with the water pump, and the other end interface of the fan heater assembly is connected with the cold accumulation device; the heater is connected to a fuel intake of the engine.
In view of the above, in order to solve the above problems, an efficient cold storage device for LNG is required to efficiently use cold energy contained in LNG during a change process of LNG into a gaseous state by storing cold energy generated from LNG first, and to supply cold energy for a long time.
Disclosure of Invention
The present invention is directed to overcome the above-mentioned drawbacks, and to provide a highly efficient and convenient LNG cold storage device which can recover and utilize cold energy in LNG and store part of the cold energy in a cold storage material.
In order to achieve the purpose, the invention adopts the following technical scheme: the utility model provides a high-efficient cold-storage device of LNG, characterized by: the cold storage device comprises a shell, cold storage materials, an LNG inlet valve, an LNG outlet valve, a first LNG solution pump, a second LNG solution pump, a first secondary refrigerant control valve, a second secondary refrigerant solution pump, a second secondary refrigerant control valve, a third secondary refrigerant solution pump and a third secondary refrigerant control valve, wherein a plurality of mutually communicated layered shells are arranged in the inner cavity of the shell, mutually communicated channel openings are formed in the upper parts of the layered shells, cold storage materials are arranged in the inner cavity formed by the layered shells, coiled cylindrical hollow channels are arranged in the cold storage materials, each hollow channel is connected end to form a through channel which is integrally communicated, only one inlet and one outlet are suitable for secondary refrigerant to flow, each through channel is respectively connected with the secondary refrigerant solution pump and the secondary refrigerant control valve, an LNG inlet is arranged at the bottom of the innermost layered shell, and the LNG inlet is connected with the first LNG solution pump and the LNG inlet valve through pipelines, an LNG outlet is formed in the side wall of the bottom of the shell and connected with a second LNG solution pump and an LNG outlet valve through a pipeline.
The inner cavity of the shell is provided with an inner layered shell, a middle layered shell and an outer layered shell, cold storage materials are respectively arranged in cavities of the inner layered shell, the middle layered shell and the outer layered shell, hollow channels are arranged in the cold storage materials, inlet pipe sections of the hollow channels are respectively connected with a first secondary refrigerant solution pump, a first secondary refrigerant control valve, a second secondary refrigerant solution pump, a second secondary refrigerant control valve, a third secondary refrigerant solution pump and a third secondary refrigerant control valve, and secondary refrigerants are arranged in the hollow channels.
The height of the channel opening is set to be highest at the innermost layer and lower from inside to outside layer by layer.
The inner cavity of the shell is provided with an inner layered shell, a middle layered shell and an outer layered shell, cold storage materials are respectively arranged in cavities of the inner layered shell, the middle layered shell and the outer layered shell, hollow channels are arranged in the cold storage materials, inlet pipe sections of the hollow channels are respectively connected with a first secondary refrigerant solution pump, a first secondary refrigerant control valve, a second secondary refrigerant solution pump, a second secondary refrigerant control valve, a third secondary refrigerant solution pump and a third secondary refrigerant control valve, and secondary refrigerants are arranged in the hollow channels.
Has the advantages that: compared with the prior art, the LNG cold energy storage system can effectively utilize high-quality cold energy resources contained in LNG and can realize high-efficiency storage of the cold energy contained in the LNG. The cold energy in the LNG is stored in the cold storage material firstly, then the cold energy is brought to a required place to work through the secondary refrigerant flowing through the through channel, and the ethylene glycol solution or the salt solution can be selected as the secondary refrigerant to work according to the cold energy stored by the cold storage material arranged in the inner, middle and outer three-layer cavities. By the operation of the device, the high-quality cold energy contained in the LNG can be effectively utilized.
Drawings
FIG. 1 is a schematic cross-sectional view of the structure of the present invention;
fig. 2(a) is a structural schematic diagram of a hollow channel in the cold storage material;
fig. 2(b) is a schematic structural view of the innermost layer cold storage material and the hollow channel;
fig. 2(c) is a schematic structural view of the intermediate layer, the outermost layer of the cool storage material and the hollow channel;
FIG. 3 is a cross-sectional view of the housing and insulation.
In the figure: 1. the LNG cold storage system comprises an LNG inlet valve, 2, a first LNG solution pump, 3, a second LNG solution pump, 4, an LNG outlet valve, 5, a first secondary refrigerant solution pump, 6, a first secondary refrigerant control valve, 7, a second secondary refrigerant solution pump, 8, a second secondary refrigerant control valve, 9, a third secondary refrigerant solution pump, 10, a third secondary refrigerant control valve, 11, a heat insulation material, 12, a cold storage material, 13, a shell, 13-1, a channel port, 14, an LNG inlet, 15, an LNG outlet, 16 and a hollow channel.
Detailed Description
The following detailed description of the preferred embodiments will be made in conjunction with the accompanying drawings.
Referring to the attached drawings in detail, the embodiment provides a high-efficiency cold accumulation device for LNG, which comprises a shell 13, cold accumulation materials 12, an LNG inlet valve 1, an LNG outlet valve 4, a first LNG solution pump 2, a second LNG solution pump 3, a first secondary refrigerant solution pump 5, a first secondary refrigerant control valve 6, a second secondary refrigerant solution pump 7, a second secondary refrigerant control valve 8, a third secondary refrigerant solution pump 9 and a third secondary refrigerant control valve 10, wherein a plurality of mutually communicated layered shells are arranged in an inner cavity of the shell to form a plurality of cavities, mutually communicated channel ports 13-1 are arranged at the upper part of each layered shell, and the height of each channel port is set to be the highest at the innermost layer and is gradually lower from inside to outside. The cold storage material 12 is placed in a cavity of the layered shell, a coiled cylindrical hollow channel 16 is arranged in the cold storage material 12, the hollow channels are connected end to form a through channel which is integrally communicated, only one inlet and one outlet are suitable for secondary refrigerant to flow, each through channel is respectively connected with a secondary refrigerant solution pump and a secondary refrigerant control valve, an LNG inlet 14 is arranged at the bottom of the innermost layered shell, the LNG inlet is connected with a first LNG solution pump and an LNG inlet valve through pipelines, an LNG outlet 15 is arranged on the side wall of the bottom of the shell, and the LNG outlet is connected with a second LNG solution pump and an LNG outlet valve through pipelines. The shell and the periphery of the layered shell are coated with heat-insulating material layers 11.
In a preferable scheme of this embodiment, the inner cavity of the housing is formed into an inner layer, a middle layer and an outer layer, the cavities of the inner layer, the middle layer and the outer layer are respectively provided with a cold storage material 12, the cold storage material 12 is internally provided with a hollow channel 16, the inlet pipe section of the hollow channel coolant is respectively connected with a first coolant solution pump 5 and a first coolant control valve 6, a second coolant solution pump 7 and a second coolant control valve 8, a third coolant solution pump 9 and a third coolant control valve 10, and the hollow channel is internally provided with coolant.
Working process
This cold-storage device's global design is the cuboid device, whole assembly process: firstly, a shell and a layered shell are sleeved together according to the size, the shell, the layered shell, the cold storage material and the shell are sequentially installed from inside to outside according to the sequence, holes are formed in the positions of a pipeline and a channel opening corresponding to the shell, a heat insulation material is coated on the outer side of the shell, and the opening ends are aligned; secondly, the pipeline of the innermost layer for the LNG to enter also plays a supporting role, the bottom of the shell is perforated to enable the LNG inlet pipeline to penetrate through, and the shell and the LNG inlet pipeline are welded together; finally, the open end is entirely covered and then sealed by using a gasket, a nut, or the like.
The LNG enters the cavity of the layered shell at the innermost layer through the LNG inlet 14 at the middle part of the bottom of the cold accumulation device and the LNG inlet valve 1 and the first LNG solution pump 2, along with the continuous injection of the LNG, the LNG begins to enter the cavity at the middle layer when the LNG at the inner layer is over the passage ports 13-1 at the inner layer and the middle layer, and the LNG begins to enter the cavity at the outermost layer when the LNG at the middle layer is over the passage ports at the middle layer and the outer layer, and finally enters a downstream cooling system through the second LNG solution pump 3 and the LNG outlet valve 4; in the inner, middle and outer three-layer cavities of the cold accumulation device, cold accumulation materials 12 can be immersed in LNG to store cold energy, and the outer sides of the shells of the inner, middle and outer three-layer cavities are covered with a layer of heat insulation materials 11 to keep the temperature; when cold energy is used, the secondary refrigerant solution pump and the secondary refrigerant control valve are respectively opened, secondary refrigerant can respectively enter a hollow channel of the cold storage material 12 through the first secondary refrigerant solution pump 5, the first secondary refrigerant control valve 6, the second secondary refrigerant solution pump 7, the second secondary refrigerant control valve 8, the third secondary refrigerant solution pump 9 and the third secondary refrigerant control valve 10 in sequence to perform heat exchange work with the cold storage material 12, required cold energy is taken out of the cold storage device, and the cold storage device enters a place needing cold supply to perform next work. Through this cold-storage device, can utilize effectively to the cold energy that contains in the LNG, realize the cold volume supply of longer time, play the effect of certain resource saving.
The above detailed description of the efficient cold storage device for LNG with reference to the embodiments is illustrative and not restrictive, and several embodiments may be cited within the scope defined, so that changes and modifications without departing from the general concept of the present invention shall fall within the protection scope of the present invention.
Claims (4)
1. The utility model provides a high-efficient cold-storage device of LNG, characterized by: the cold storage device comprises a shell, cold storage materials, an LNG inlet valve, an LNG outlet valve, a first LNG solution pump, a second LNG solution pump, a first secondary refrigerant control valve, a second secondary refrigerant solution pump, a second secondary refrigerant control valve, a third secondary refrigerant solution pump and a third secondary refrigerant control valve, wherein a plurality of mutually communicated layered shells are arranged in the inner cavity of the shell, mutually communicated channel openings are formed in the upper parts of the layered shells, cold storage materials are arranged in the inner cavity formed by the layered shells, coiled cylindrical hollow channels are arranged in the cold storage materials, each hollow channel is connected end to form a through channel which is integrally communicated, only one inlet and one outlet form secondary refrigerant flowing, each through channel is respectively connected with the secondary refrigerant solution pump and the secondary refrigerant control valve, an LNG inlet is arranged at the bottom of the innermost layered shell, and the LNG inlet is connected with the first LNG solution pump and the LNG inlet valve through pipelines, an LNG outlet is formed in the side wall of the bottom of the shell and connected with a second LNG solution pump and an LNG outlet valve through a pipeline.
2. An LNG highly efficient cold storage device according to claim 1, characterized in that: the inner cavity of the shell is provided with an inner layered shell, a middle layered shell and an outer layered shell, cold storage materials are respectively arranged in cavities of the inner layered shell, the middle layered shell and the outer layered shell, hollow channels are arranged in the cold storage materials, inlet pipe sections of the hollow channels are respectively connected with a first secondary refrigerant solution pump, a first secondary refrigerant control valve, a second secondary refrigerant solution pump, a second secondary refrigerant control valve, a third secondary refrigerant solution pump and a third secondary refrigerant control valve, and secondary refrigerants are arranged in the hollow channels.
3. An LNG highly efficient cold storage device according to claim 1, characterized in that: the height of the channel opening is set to be highest at the innermost layer and lower from inside to outside layer by layer.
4. An LNG highly efficient cold storage device according to claim 1, characterized in that: the shell and the periphery of the layered shell are coated with heat-insulating material layers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911278753.8A CN110966815A (en) | 2019-12-13 | 2019-12-13 | High-efficient cold-storage device of LNG |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911278753.8A CN110966815A (en) | 2019-12-13 | 2019-12-13 | High-efficient cold-storage device of LNG |
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| CN110966815A true CN110966815A (en) | 2020-04-07 |
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| CN201911278753.8A Pending CN110966815A (en) | 2019-12-13 | 2019-12-13 | High-efficient cold-storage device of LNG |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113329563A (en) * | 2021-04-30 | 2021-08-31 | 东莞联鹏智能装备有限公司 | Bonding head, bonding device and forming method of cooling channel |
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2019
- 2019-12-13 CN CN201911278753.8A patent/CN110966815A/en active Pending
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113329563A (en) * | 2021-04-30 | 2021-08-31 | 东莞联鹏智能装备有限公司 | Bonding head, bonding device and forming method of cooling channel |
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