CN112629091A - LNG cold energy recovery and ice making system - Google Patents
LNG cold energy recovery and ice making system Download PDFInfo
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- CN112629091A CN112629091A CN202110037841.XA CN202110037841A CN112629091A CN 112629091 A CN112629091 A CN 112629091A CN 202110037841 A CN202110037841 A CN 202110037841A CN 112629091 A CN112629091 A CN 112629091A
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- 238000011084 recovery Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims abstract description 106
- 239000005457 ice water Substances 0.000 claims abstract description 51
- 239000003507 refrigerant Substances 0.000 claims abstract description 48
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 29
- 238000000605 extraction Methods 0.000 claims abstract description 23
- 239000010410 layer Substances 0.000 claims description 25
- 230000005540 biological transmission Effects 0.000 claims description 5
- 238000003860 storage Methods 0.000 claims description 5
- 239000011241 protective layer Substances 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 229910001220 stainless steel Inorganic materials 0.000 claims description 2
- 239000010935 stainless steel Substances 0.000 claims description 2
- 238000013461 design Methods 0.000 abstract description 5
- 239000006200 vaporizer Substances 0.000 abstract description 4
- 238000009434 installation Methods 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 24
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 8
- 230000008016 vaporization Effects 0.000 description 6
- 230000008014 freezing Effects 0.000 description 5
- 238000007710 freezing Methods 0.000 description 5
- 230000005484 gravity Effects 0.000 description 5
- 230000001105 regulatory effect Effects 0.000 description 5
- 238000009834 vaporization Methods 0.000 description 5
- 239000003345 natural gas Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 2
- 238000010923 batch production Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 239000013505 freshwater Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 239000010963 304 stainless steel Substances 0.000 description 1
- 229910000589 SAE 304 stainless steel Inorganic materials 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
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- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000012986 modification Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Images
Classifications
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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
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C1/00—Producing ice
- F25C1/04—Producing ice by using stationary moulds
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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
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C1/00—Producing ice
- F25C1/22—Construction of moulds; Filling devices for moulds
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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
- F25C—PRODUCING, WORKING OR HANDLING ICE
- F25C1/00—Producing ice
- F25C1/22—Construction of moulds; Filling devices for moulds
- F25C1/24—Construction of moulds; Filling devices for moulds for refrigerators, e.g. freezing trays
- F25C1/246—Moulds with separate grid structure
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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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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P60/00—Technologies relating to agriculture, livestock or agroalimentary industries
- Y02P60/80—Food processing, e.g. use of renewable energies or variable speed drives in handling, conveying or stacking
- Y02P60/85—Food storage or conservation, e.g. cooling or drying
Abstract
The invention discloses an LNG cold energy recovery ice making system, and belongs to the field of cold energy extraction devices. The LNG low-pressure circulating system is provided with a cold energy extraction module and a cold energy utilization module, wherein the cold energy extraction module is provided with a low-pressure circulating barrel and a heat exchanger, the cold energy extraction module and the cold energy utilization module are connected through a refrigerant liquid supply pipeline and a refrigerant gas return pipeline, the low-pressure circulating barrel is connected with the heat exchanger through a connecting pipeline, and the end part of the heat exchanger is externally connected with an LNG conveying pipeline through the connecting pipeline; the cold energy utilization module is provided with an ice water tank and a warm water deicing pool, an ice water pool is arranged in the ice water tank, an ice bucket is arranged on the upper layer of the ice water pool, and a low-temperature coil pipe is arranged on the lower layer of the ice water pool. The invention has simple structure, safety, reliability, energy saving and high efficiency, not only avoids the large power consumption of the traditional ice making mode, but also reduces the influence of the traditional vaporizer on the atmospheric temperature; the system adopts a modular design, is packaged by a standard container, is convenient to transport, saves the installation space, and is simple and convenient to install on site.
Description
Technical Field
The application belongs to the technical field of cold energy extraction devices, and more specifically relates to an LNG cold energy recovery ice making system.
Background
Natural gas is used as an environment-friendly and low-cost energy source, and the using amount is higher and higher. The current natural gas use mode is as follows: the natural gas produced by the production is condensed to Liquid (LNG) at ultra-low temperature, transported to a use place, and is vaporized again by a vaporizer for use by users. Most of the conventional vaporization equipment adopts air to heat LNG, and a great amount of cold energy in the LNG vaporization process is released to the atmosphere, thereby causing resource waste. Therefore, the LNG cold energy extraction device needs to be researched, so that cold energy is extracted and recovered to generate economic benefits, and meanwhile, the influence of the traditional vaporizer on the atmospheric temperature is reduced.
Disclosure of Invention
The invention provides an LNG cold energy recovery ice making system aiming at the technical problems in the prior art.
In order to solve the technical problems, the LNG heat exchanger is provided with a cold energy extraction module and a cold energy utilization module, wherein the cold energy extraction module is provided with a low-pressure circulation barrel and a heat exchanger, the cold energy extraction module and the cold energy utilization module are connected through a refrigerant liquid supply pipeline and a refrigerant gas return pipeline, the low-pressure circulation barrel is connected with the heat exchanger through a connecting pipeline, and the end part of the heat exchanger is externally connected with an LNG conveying pipeline through the connecting pipeline; the cold energy utilization module is provided with an ice water tank and a warm water deicing pool, an ice water pool is arranged in the ice water tank, an ice bucket is arranged on the upper layer of the ice water pool, and a low-temperature coil pipe is arranged on the lower layer of the ice water pool.
Preferably, the external former LNG vaporization system of LNG pipeline, the inlet of heat exchanger is connected with the LNG holding vessel through LNG liquid supply pipeline, and the gas outlet of heat exchanger is connected with LNG pressure regulating station that adjusts the temperature through LNG gas outlet pipeline, is provided with LNG proportional control valve on the LNG liquid supply pipeline.
Preferably, the heat exchanger is a stainless steel shell and tube heat exchanger, a liquid outlet is formed in the lower portion of the heat exchanger and connected with the low-pressure circulating barrel through a liquid outlet pipe, a liquid outlet pipe control valve is arranged on the liquid outlet pipe, and an air inlet is formed in the upper portion of the heat exchanger.
Preferably, one end of the refrigerant liquid supply pipeline is connected with a liquid outlet at the bottom of the low-pressure circulating barrel, and the other end of the refrigerant liquid supply pipeline is connected with a liquid inlet of the low-temperature coil pipe; one end of the refrigerant return pipeline is connected with an air inlet of the heat exchanger, and the other end of the refrigerant return pipeline is connected with an air outlet of the low-temperature coil pipe.
Preferably, be provided with the ice mould frame in the ice bucket, the low temperature coil pipe setting is at the downside of ice bucket, and the ice chest sets up with warm water deicing pond is adjacent, and warm water deicing pond sets up the short avris in the ice chest, and one side that the ice chest was kept away from in warm water deicing pond is provided with the frame of falling ice, and the frame of falling ice is kept away from one side in deicing pond and is provided with the skating slope, and one side that the ice chest was kept away from in the ice chest is provided with the mixer.
Preferably, a protective layer is arranged on the outer side of the ice water tank and consists of an outer layer plate on the outer side, an inner layer plate on the inner side and a heat insulation layer between the outer layer plate and the inner layer plate; the upper end of the ice water tank is provided with a lifter and an automatic constant volume water feeder, the lifter moves along a guide rail of the lifter, and the upper end of the ice bucket is provided with a hook.
Preferably, a main control valve of the gas return pipeline is arranged on the refrigerant gas return pipeline, a gas return pipeline control valve is arranged on one side, close to the gas inlet, of the refrigerant gas return pipeline, and the refrigerant gas return pipeline is connected with the low-pressure circulating barrel through a second gas return pipeline; the liquid outlet at the bottom of the low-pressure circulating barrel is connected with a liquid supply control valve and a liquid supply filter, the end part of a refrigerant liquid supply pipeline is connected with the liquid supply filter, and one side, close to the liquid supply filter, of the refrigerant liquid supply pipeline is provided with a liquid supply valve and a liquid supply electromagnetic valve.
Preferably, an LNG bypass valve is arranged between the LNG outlet pipeline and the LNG liquid supply pipeline, and an LNG control valve is connected to the LNG outlet pipeline.
Preferably, the upper end of the low-pressure circulating barrel is connected with a safety valve group, the low-pressure circulating barrel is connected with a magnetic turning plate liquid level meter, and the magnetic turning plate liquid level meter is connected with a liquid level meter remote transmission device.
Preferably, the cold energy extraction module and the cold energy utilization module are both packaged in a standard container.
Compared with the prior art, the invention has the following beneficial effects:
the invention has simple structure, safety, reliability, energy saving and high efficiency, not only avoids the large power consumption of the traditional ice making mode, but also reduces the influence of the traditional vaporizer on the atmospheric temperature; all equipment is packaged in a standard container, so that modular movable application is realized, the system adopts a modular design, the standard container is packaged, transportation is facilitated, the installation space is saved, and the field installation is simple and convenient; besides being applied to ice making, the system can be matched with other modules and applied to various working conditions such as freezing, refrigeration, food processing, air conditioning and the like, the form is flexible and changeable, different requirements are met, and the standardized design is suitable for batch production.
In addition, the invention realizes circulation by gravity by utilizing the difference of the specific gravity of the vapor state and the liquid state, and does not need to be additionally provided with a circulating pump; the system adopts a novel working medium ice river refrigerant, has a low freezing point, allows the system to accumulate cold in advance when not in use, and improves the efficiency. And the system is convenient to switch, and has no influence on the original system of the LNG vaporizing station.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without inventive exercise.
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic structural diagram of a cold energy extraction module according to the present invention;
FIG. 3 is a schematic structural diagram of a cold energy utilization module according to the present invention;
FIG. 4 is a schematic top view of the cold energy utilization module of the present invention;
fig. 5 is a top view of the ice mold frame of the present invention.
The symbols in the figures indicate:
1. a cold energy extraction module; 2. a cold energy utilization module; 3. a refrigerant supply line; 4. a refrigerant return line; 5. a low pressure recycle bin; 51. a liquid outlet; 6. a heat exchanger; 61. a heat exchanger air inlet; 62. a heat exchanger air outlet; 63. a liquid inlet of the heat exchanger; 64. a liquid outlet of the heat exchanger; 7. a return gas line control valve; an LNG outlet pipeline; 9, LNG liquid supply pipeline; an LNG control valve; an LNG proportion regulating valve; 12. a liquid outlet pipe; 13. a drain pipe control valve; 14. a liquid supply control valve; 15. a liquid supply filter; 16. a liquid supply valve; 17. a liquid supply solenoid valve; 18. a magnetic flap level gauge; 19. a remote transmission device of the liquid level meter; 20. a safety valve bank; 21. an ice water tank; 22. a warm water deicing pool; 23. an ice water tank; 24. an ice bucket; 25. a low temperature coil; 26. a main control valve of the gas return pipeline; 27. a second return air line; 28. a blender; 29. an ice falling frame; 30. skating slopes; 31. an automatic constant volume water feeder; 32. a hoist guide rail; 33. a hoist; 34. hooking; 35. an outer plate; 36. an inner layer board; 37. a heat-insulating layer; an LNG bypass valve.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present application clearer, the present application is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.
Referring to fig. 1 and 2, the invention provides an LNG cold energy recovery ice making system, which is composed of a cold energy extraction module 1 and a cold energy utilization module 2, wherein the cold energy extraction module 1 is used for taking out cold energy from LNG, and the cold energy utilization module 2 is ice water making equipment and mainly uses the extracted cold energy to make ice cubes; the cold energy extraction module 1 and the cold energy utilization module 2 are connected through a refrigerant liquid supply pipeline 3 and a refrigerant return gas pipeline 4, so that a mutually communicated system is formed in series.
In this embodiment, the cold energy extraction module 1 is provided with a low-pressure circulation barrel 5 and a heat exchanger 6, the low-pressure circulation barrel 5 and the heat exchanger 6 are arranged adjacently, a heat exchanger air inlet 61 is arranged at the upper part of the heat exchanger 6, the heat exchanger air inlet 61 is connected with a refrigerant return pipeline 4, and a return pipeline control valve 7 is arranged on one side of the refrigerant return pipeline 4 close to the heat exchanger air inlet 61; a heat exchanger gas outlet 62 and a heat exchanger liquid inlet 63 are arranged at the left end part of the heat exchanger 6, the heat exchanger gas outlet 62 and the heat exchanger liquid inlet 63 are both connected with an original LNG vaporization system arranged outside through connecting pipelines, wherein the heat exchanger gas outlet 62 is connected with an LNG temperature and pressure regulating station through an LNG gas outlet pipeline 8, the heat exchanger liquid inlet 63 is connected with an LNG storage tank through an LNG liquid supply pipeline 9, an LNG control valve 10 is arranged on the LNG gas outlet pipeline 8, and an LNG proportional regulating valve 11 is arranged on the LNG liquid supply pipeline 9 and used for regulating liquid LNG liquid supply; the lower part of the heat exchanger 6 is provided with a heat exchanger liquid outlet 64, the heat exchanger liquid outlet 64 is connected with the low-pressure circulating barrel 5 through a liquid outlet pipe 12, and the liquid outlet pipe 12 is provided with a liquid outlet pipe control valve 13.
Furthermore, in this embodiment, the heat exchanger 6 is a 304 stainless steel shell-and-tube heat exchanger, and heat exchange between two fluids with different temperatures is performed by arranging fluids with different temperatures in the shell side and the tube side.
In this embodiment, when low-temperature LNG (about-160 ℃) from the LNG storage tank enters the heat exchange tube bundle of the heat exchanger 6 through the LNG liquid supply pipeline 9 and the LNG proportional control valve 11, the vapor refrigerant (about-40 ℃) returned from the cold energy utilization module 2 enters the outside of the heat exchange tube bundle of the heat exchanger 6 through the refrigerant gas return pipeline 4 and the gas return pipeline control valve 7, and transfers heat to the low-temperature LNG in the tube bundle through the tube wall, so that the liquid LNG absorbs heat and is heated and vaporized, and then the vapor natural gas is externally transferred through the LNG gas outlet pipeline 8 and the LNG control valve 10, thereby completing the vaporization process of the LNG; and the refrigerant outside the heat exchange tube bundle in the heat exchanger 6 is condensed to be liquid (about-42 ℃), flows downwards through a heat exchanger liquid outlet 64 at the bottom of the heat exchanger 6 by means of gravity, and enters the low-pressure circulating barrel 5 for temporary storage through a liquid outlet pipe 12 and a liquid outlet pipe control valve 13.
In this embodiment, a liquid outlet 51 is disposed at the bottom of the low-pressure circulating barrel 5, a liquid supply control valve 14 and a liquid supply filter 15 are sequentially connected to the outer end of the liquid outlet 51, the liquid supply filter 15 is connected to one end of the refrigerant liquid supply pipeline 3, and a liquid supply valve 16 and a liquid supply electromagnetic valve 17 are further disposed at one end of the refrigerant liquid supply pipeline 3, which is close to the low-pressure circulating barrel 5.
Furthermore, in this embodiment, the side of the low-pressure circulation barrel 5 is connected with a magnetic turning plate liquid level meter 18 through a connecting pipeline, the magnetic turning plate liquid level meter 18 is connected with a liquid level meter remote transmission device 19, the liquid level of the refrigerant in the low-pressure circulation barrel 5 is monitored through the magnetic turning plate liquid level meter 18 and the liquid level meter remote transmission device 19, and the upper end of the low-pressure circulation barrel 5 is connected with a safety valve group 20, so that the use safety of the low-pressure circulation barrel 5 is improved.
In this embodiment, the cold energy utilization module 2 is provided with an ice water tank 21 and a warm water deicing tank 22, the ice water tank 21 is internally provided with an ice water tank 23, the upper layer of the ice water tank 23 is provided with an ice bucket 24, the lower layer of the ice water tank 23 is provided with a low-temperature coil pipe 25, and the low-temperature coil pipe 25 is arranged at the lower side of the ice bucket 24; one end of the refrigerant liquid supply pipeline 3 is connected with a liquid supply filter 15 arranged at the bottom of the low-pressure circulating barrel 5, and the other end is connected with a liquid inlet of the low-temperature coil pipe 25; one end of the refrigerant return line 4 is connected to the heat exchanger inlet 61, and the other end of the refrigerant return line 4 is connected to the outlet of the low-temperature coil 25.
In the implementation, the liquid refrigerant in the low-pressure circulating barrel 5 passes through the liquid supply control valve 14 and the liquid supply filter 15 downwards under the action of gravity, then flows into the low-temperature coil 25 of the cold energy utilization module 2 through the liquid supply valve 16 and the liquid supply electromagnetic valve 17 on the refrigerant liquid supply pipeline 3 to evaporate and absorb heat, and then returns to the heat exchanger 6 of the cold energy extraction module 1 through the refrigerant gas return pipeline 4 in a gaseous state to be condensed again, and the cycle is repeated in this way, so that the cold energy extraction and transfer of the LNG are realized.
Furthermore, in this embodiment, a return line master control valve 26 is disposed on the refrigerant return line 4 for controlling the flow rate of the refrigerant gas.
Further, in the present embodiment, the refrigerant return pipe 4 is connected to the low-pressure circulation tank 5 through the second return pipe 27, and the second return pipe 27 is provided with the return pipe control valve 7.
As shown in the figure, in the present embodiment, the ice water tank 21 is disposed adjacent to the warm water deicing pool 22, the warm water deicing pool 22 is disposed on one side of a short side of the ice water tank 21, a plurality of sets of ice mold frames are disposed in the ice bucket 24 in parallel, and the ice mold frames serve as molds for making block ice and are used for limiting and fixing the size of the block ice. The side of the ice water tank 23 far away from the warm water deicing tank 22 is provided with a stirrer 28, and the stirrer 28 conveys the ice water in the lower layer to the upper layer to absorb the heat in the ice bucket 24, so that the fresh water in the ice bucket 24 is frozen into block ice. An ice pouring frame 29 is arranged on one side of the warm water deicing pool 22 far away from the ice water pool 23, an ice sliding slope 30 is arranged on one side of the ice pouring frame 29 far away from the warm water deicing pool 22, and the ice sliding slope 30 is used for sliding ice blocks poured out of the ice bucket 24 to a loading point.
In this embodiment, the upper portion of the cold energy utilization module 2 is provided with an automatic constant volume water feeder 31 for feeding clear water into the ice bucket 24.
Furthermore, in this embodiment, the upper end of the cold energy utilization module 2 is provided with a lifter rail 32 and a lifter 33, the lifter 33 can move along the lifter rail 32, the upper end of the ice bucket 24 is provided with a hook 34, and the lifter 33 can transport the ice bucket 24 from the ice water tank 23 to the warm water deicing tank 22 and the ice dumping frame 29, so as to transport the ice cubes out.
In this embodiment, when the refrigerant absorbs heat and evaporates (about-45 ℃) in the low-temperature coil 25 at the lower layer of the ice water tank 21, the ice water outside the low-temperature coil 25 is cooled (about-15 ℃), then the ice water at the lower layer is conveyed to the upper layer by the stirrer 28 to absorb heat in the ice bucket 24, the fresh water in the ice bucket 24 is frozen into ice blocks (-5-10 ℃), and the ice water at the upper layer (-12-13 ℃) flows to the lower layer to be cooled by the low-temperature coil 25 under the action of negative pressure and gravity at the other side of the ice water tank 23, i.e., the side far away from the stirrer 28, and the process is repeated in this way. After ice making is finished, the ice mold frame is lifted out of the ice water pool by a lifter 33 and placed in a warm water deicing pool 22 arranged beside, an ice layer close to the ice bucket 24 is melted, block ice is separated from the ice bucket 24, then the ice mold frame is lifted to an ice dumping frame 29 to dump ice blocks out of the ice bucket 24, the ice blocks slide to a loading point on an ice sliding slope 30, the ice bucket 24 is filled with clear water under the action of an automatic constant volume water feeder 31 and placed back to the ice water pool 23 again for freezing to produce ice, and the steps are repeated in a circulating manner to realize utilization of cold energy. The temperature of the water in the warm water deicing pool 22 is reduced after deicing, the water is transferred to the automatic constant volume water feeder 31 and is injected into the ice bucket 24, and the cold energy discharged in the deicing link is effectively utilized; the ice water adopts a novel working medium ice river refrigerant, has an extremely low freezing point, has an ice water temperature of about-15 ℃ when ice is made, and can be reduced to-35 ℃ when ice is not made, thereby playing a role in cold accumulation in advance. The ice mold frame and the ice bucket 24 are made in a unified size and a unified standard, can be quickly replaced and are convenient to maintain.
Further, a shield layer is provided on the outside of the ice water tank 21, and the shield layer is composed of an outer plate 35 provided on the outside, an inner plate 36 provided on the inside, and a heat insulating layer 37 provided between the outer plate 35 and the inner plate 36.
Furthermore, in this embodiment, an LNG bypass valve 38 is disposed between the LNG gas outlet pipeline 8 and the LNG liquid supply pipeline 9, and the cold energy adjustment of the LNG cold energy recovery ice making system is realized through the LNG proportional control valve 11, when the device is not used, the LNG proportional control valve 11 is closed, and the LNG bypass valve 38 is opened, so that the normal use of the original LNG system is not affected.
In the embodiment, the system is matched with an electric control system, and is fully automatically controlled, simple in operation and convenient to use. The cold energy extraction module 1 and the cold energy utilization module 2 are both packaged in a standard container, so that modularized movable application is realized, the system adopts a modularized design, the standard container is packaged, transportation is facilitated, the mounting space is saved, the field mounting is simple and convenient, and the standardized design is suitable for batch production; the ice-making system can be applied to ice making, can be matched with other modules, is applied to various working conditions such as freezing, refrigeration, food processing, air conditioning and the like, is flexible and changeable in form, and meets different requirements.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be considered as limiting the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.
Claims (10)
- The LNG cold energy recovery ice making system is provided with a cold energy extraction module and a cold energy utilization module, wherein the cold energy extraction module is provided with a low-pressure circulation barrel and a heat exchanger, and is characterized in that the cold energy extraction module and the cold energy utilization module are connected through a refrigerant liquid supply pipeline and a refrigerant gas return pipeline, the low-pressure circulation barrel is connected with the heat exchanger through a connecting pipeline, and the end part of the heat exchanger is externally connected with an LNG conveying pipeline through the connecting pipeline; the cold energy utilization module is provided with an ice water tank and a warm water deicing pool, an ice water pool is arranged in the ice water tank, an ice bucket is arranged on the upper layer of the ice water pool, and a low-temperature coil pipe is arranged on the lower layer of the ice water pool.
- 2. The LNG cold energy recovery and ice making system of claim 1, wherein the LNG transfer pipeline is externally connected with an LNG storage tank, a liquid inlet of the heat exchanger is connected with the LNG storage tank through an LNG liquid supply pipeline, a gas outlet of the heat exchanger is connected with the LNG temperature and pressure adjusting station through an LNG gas outlet pipeline, and the LNG liquid supply pipeline is provided with an LNG proportion adjusting valve.
- 3. The LNG cold energy recovery ice making system according to claim 2, wherein the heat exchanger is a stainless steel shell and tube heat exchanger, the lower portion of the heat exchanger is provided with a liquid outlet, the liquid outlet is connected to the low pressure circulation tank through a liquid outlet pipe, the liquid outlet pipe is provided with a liquid outlet control valve, and the upper portion of the heat exchanger is provided with an air inlet.
- 4. The LNG cold energy recovery ice making system of claim 3, wherein one end of the refrigerant liquid supply line is connected to a liquid outlet at the bottom of the low pressure circulation tank, and the other end of the refrigerant liquid supply line is connected to a liquid inlet of the low temperature coil; one end of the refrigerant return pipeline is connected with the air inlet of the heat exchanger, and the other end of the refrigerant return pipeline is connected with the air outlet of the low-temperature coil pipe.
- 5. The LNG cold energy recovery ice making system of claim 1 or 4, wherein an ice mold frame is arranged in the ice bucket, the low-temperature coil is arranged on the lower side of the ice bucket, the ice water tank is arranged adjacent to the warm water deicing tank, the warm water deicing tank is arranged on the short side of the ice water tank, an ice dumping frame is arranged on one side, away from the ice water tank, of the warm water deicing tank, an ice sliding slope is arranged on one side, away from the ice water tank, of the ice water tank, and a stirrer is arranged on one side, away from the ice water deicing tank, of the ice water tank.
- 6. The LNG cold energy recovery ice making system of claim 5, wherein the ice water tank is provided with a protective layer on an outer side, the protective layer is composed of an outer plate, an inner plate and a heat insulation layer between the outer plate and the inner plate; the ice water tank is characterized in that a lifting machine and an automatic constant volume water feeder are arranged at the upper end of the ice water tank, the lifting machine moves along a guide rail of the lifting machine, and a hook is arranged at the upper end of the ice bucket.
- 7. The LNG cold energy recovery ice making system according to claim 4, wherein a return gas line master control valve is provided on the refrigerant return gas line, and a return gas line control valve is provided on a side of the refrigerant return gas line near the gas inlet, the refrigerant return gas line being connected to the low pressure circulation tank through a second return gas line; the liquid outlet at the bottom of the low-pressure circulating barrel is connected with a liquid supply control valve and a liquid supply filter, the end part of the refrigerant liquid supply pipeline is connected with the liquid supply filter, and one side, close to the liquid supply filter, of the refrigerant liquid supply pipeline is provided with a liquid supply valve and a liquid supply electromagnetic valve.
- 8. The LNG cold energy recovery ice making system of claim 7, wherein an LNG bypass valve is disposed between the LNG outlet pipeline and the LNG supply pipeline, and an LNG control valve is connected to the LNG outlet pipeline.
- 9. The LNG cold energy recovery ice making system of claim 1 or 8, wherein the upper end of the low-pressure circulating barrel is connected with a safety valve group, the low-pressure circulating barrel is connected with a magnetic turning plate liquid level meter, and the magnetic turning plate liquid level meter is connected with a liquid level meter remote transmission device.
- 10. The LNG cold energy recovery ice making system of claim 1, wherein the cold energy extraction module and the cold energy utilization module are packaged in a standard container.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113686069A (en) * | 2021-08-31 | 2021-11-23 | 骊阳(广东)节能科技股份有限公司 | LNG cold energy recovery ice making system and method |
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