CN119468576A - System and method for refrigerating container by combining ship LNG and carbon capture - Google Patents
System and method for refrigerating container by combining ship LNG and carbon capture Download PDFInfo
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- CN119468576A CN119468576A CN202411627422.1A CN202411627422A CN119468576A CN 119468576 A CN119468576 A CN 119468576A CN 202411627422 A CN202411627422 A CN 202411627422A CN 119468576 A CN119468576 A CN 119468576A
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- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 title claims abstract description 20
- 229910052799 carbon Inorganic materials 0.000 title claims abstract description 20
- 238000000034 method Methods 0.000 title claims abstract description 13
- 235000011089 carbon dioxide Nutrition 0.000 claims abstract description 132
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims abstract description 131
- 239000007788 liquid Substances 0.000 claims abstract description 93
- 238000005057 refrigeration Methods 0.000 claims abstract description 67
- 238000001816 cooling Methods 0.000 claims abstract description 15
- 230000002452 interceptive effect Effects 0.000 claims abstract description 4
- 239000000446 fuel Substances 0.000 claims description 15
- 238000002485 combustion reaction Methods 0.000 claims description 12
- 238000002309 gasification Methods 0.000 claims description 8
- 238000011084 recovery Methods 0.000 description 4
- 230000003993 interaction Effects 0.000 description 3
- 229910002092 carbon dioxide Inorganic materials 0.000 description 2
- 230000008016 vaporization Effects 0.000 description 2
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000014509 gene expression Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Abstract
本发明涉及一种船舶LNG与碳捕联合为集装箱制冷的系统及方法，包括：LNG系统，CO2生成与捕捉系统，CO2释放与液化系统，干冰生成和储存系统，用于将液态CO2加工成干冰进行存储，和，液态CO2集装箱冷藏箱冷却系统，用于将液态CO2送入集装箱冷却集装箱冷藏箱。本发明能够将LNG系统，CO2生成与捕捉系统，干冰生成和储存系统，液态CO2集装箱冷藏箱冷却系统四个独立系统实现了交互换热，提高了能源利用率，所制成的干冰可以进一步利用，也提高经济性。通过设置3个温控阀保证系统各部温度适宜，具体为保证集装箱冷藏箱组温度适宜，保证干冰冷却的液态CO2不会过冷，保证被LNG冷却的集装箱干冰存储箱组不会过冷。
The present invention relates to a system and method for combining ship LNG and carbon capture for container refrigeration, comprising: an LNG system, a CO2 generation and capture system, a CO2 release and liquefaction system, a dry ice generation and storage system for processing liquid CO2 into dry ice for storage, and a liquid CO2 container refrigeration box cooling system for delivering liquid CO2 into a container to cool the container refrigeration box. The present invention can realize interactive heat exchange among four independent systems, namely, the LNG system, the CO2 generation and capture system, the dry ice generation and storage system, and the liquid CO2 container refrigeration box cooling system, thereby improving energy utilization. The produced dry ice can be further utilized, and the economy is also improved. By setting three temperature control valves, it is ensured that the temperature of each part of the system is appropriate, specifically, the temperature of the container refrigeration box group is appropriate, the liquid CO2 cooled by dry ice is not overcooled, and the container dry ice storage box group cooled by LNG is not overcooled.
Description
Technical Field
The invention relates to the technical field of container ship refrigeration, in particular to a system and a method for refrigerating a container by combining ship LNG and carbon capture.
Background
With the increasing strictness of global emission restrictions, many container ships are equipped with LNG systems and carbon dioxide capturing systems, and a cold box refrigeration system is also required for the container ship for transporting frozen goods, and although the systems all need heat exchange, the systems are relatively independent, no heat exchange interaction exists, and the energy utilization rate is low.
Disclosure of Invention
According to the technical problems, a system and a method for refrigerating a container by combining ship LNG and carbon capture are provided.
The invention adopts the following technical means:
A system for combining LNG and carbon capture of a ship to refrigerate a container, comprising:
an LNG system for processing LNG, vaporizing LNG for use as fuel,
CO 2 generation and capture system for carbon capture recovery of CO 2 generated after LNG gasification combustion, CO 2 release and liquefaction system for liquefaction of recovered CO 2,
A dry ice generation and storage system for processing liquid CO 2 into dry ice for storage, and,
A liquid CO 2 container refrigeration cooling system for delivering liquid CO 2 to a container cooled container refrigeration.
Further, the LNG system comprises an LNG fuel supply unit and a gas treatment unit, an LNG-CO 2 heat exchanger is arranged between the LNG fuel supply unit and the gas treatment unit, a heat exchange pipeline is arranged between the LNG fuel supply unit and the LNG-CO 2 heat exchanger, the heat exchange pipeline is connected with a container dry ice storage box group, and a container dry ice storage box temperature control valve is arranged on the heat exchange pipeline and used for adjusting the flow of LNG entering the dry refrigerator.
Further, the CO 2 generation and capture system comprises a gas utilization device and a combustion exhaust CO 2 capture unit, wherein the gas utilization device is connected with the output end of the LNG system, and the combustion exhaust CO 2 capture unit is connected with the CO 2 release and liquefaction system.
Further, the CO 2 release and liquefaction system comprises a CO 2 release unit and a CO 2 liquefaction unit, and a pipeline between the CO 2 release unit and the CO 2 liquefaction unit exchanges heat through an LNG-CO 2 heat exchanger.
Further, the dry ice generating and storing system comprises a first liquid CO 2 pump, a dry ice generating unit and a container dry ice storage box, wherein the input end of the first liquid CO 2 pump is connected with the CO 2 release and liquefying system, the output end of the first liquid CO 2 pump is connected with the dry ice generating unit, and the dry ice generating unit is used for solidifying CO 2 and storing solidified dry ice in the container dry ice storage box.
Further, the liquid CO 2 container refrigeration cooling system comprises a second liquid CO 2 pump, a container refrigeration temperature control valve, a container refrigeration and a liquid CO 2 temperature control valve, wherein the input end of the second liquid CO 2 pump is connected with the CO 2 release and liquefaction system, one output end of the second liquid CO 2 pump is connected with the container refrigeration, the other output end bypasses the container refrigeration and is connected to the container refrigeration output pipeline, the container refrigeration output end is provided with the container refrigeration output pipeline, the container refrigeration temperature control valve is arranged between the second liquid CO 2 pump and the container refrigeration and is used for switching the liquid CO 2 to be conveyed to the corresponding pipeline, the container refrigeration output pipeline is connected with the liquid CO 2 temperature control valve, one output end of the liquid CO 2 temperature control valve is connected with the dry ice generating and storing system, the flow entering the dry refrigerator is reduced when the liquid CO 2 is supercooled, the flow entering the dry refrigerator is increased when the liquid CO 2 is overheated, and the other output end of the liquid CO 2 temperature control valve is connected with the CO 2 release and the pump between the second liquid CO 2 release and the second liquid CO pipeline.
The invention also discloses a container refrigeration method combining ship LNG and carbon capture, which comprises the following steps:
The LNG system, the dry ice generating and storing system and the liquid CO 2 container refrigeration storage cooling system realize interactive heat exchange through the container dry ice storage box group, LNG is heated once, and the dry ice generating and storing system and the liquid CO 2 container refrigeration storage cooling system are cooled;
the LNG system and the CO 2 release and liquefaction system realize heat exchange interaction through the LNG-CO 2 heat exchanger, LNG is heated secondarily, and CO 2 is cooled and liquefied.
LNG gasification is used as fuel, and CO 2 generated after LNG gasification combustion is subjected to carbon capture and recovery by a CO 2 generation and capture system;
The group of container refrigeration is cooled by liquid CO 2, liquid CO 2 is heated, and the container refrigeration is cooled.
Further, temperature data are acquired through the set temperature control system, and based on the acquired temperature data, the pipeline adjustment of the temperature control valve of the container refrigeration storage box is adjusted, so that the entering amount of liquid CO 2 is reduced when the refrigeration box is supercooled, and the entering amount of liquid CO 2 is increased when the refrigeration box is overheated;
Based on the collected temperature data, adjusting a pipeline of a liquid CO 2 temperature control valve, reducing the flow entering a dry refrigerator when the liquid CO 2 is supercooled, and increasing the flow entering the dry refrigerator when the liquid CO 2 is overheated;
Based on the collected temperature data, the opening degree of a temperature control valve of a container dry ice storage box is adjusted, the LNG flow entering a dry refrigerator is reduced when the dry ice is supercooled, and the LNG flow entering the dry refrigerator is increased when the dry ice is overheated.
Compared with the prior art, the invention has the advantages that the four independent systems of the LNG system, the CO 2 generation and capture system, the dry ice generation and storage system and the cooling system of the liquid CO 2 container refrigerator can realize the heat exchange, the energy utilization rate is improved, the manufactured dry ice can be further utilized, and the economy is also improved. The temperature of each part of the system is guaranteed to be suitable by arranging 3 temperature control valves, and particularly, the temperature of the container refrigeration box group is guaranteed to be suitable, the liquid CO2 cooled by the dry ice is guaranteed not to be supercooled, and the container dry ice storage box group cooled by the LNG is guaranteed not to be supercooled.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings may be obtained according to the drawings without inventive effort to a person skilled in the art.
FIG. 1 is a system diagram of the present invention.
Detailed Description
It should be noted that, without conflict, the embodiments of the present invention and features of the embodiments may be combined with each other. The invention will be described in detail below with reference to the drawings in connection with embodiments.
For the purpose of making the objects, technical solutions and advantages of the embodiments of the present invention more apparent, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of exemplary embodiments according to the present invention. As used herein, the singular is also intended to include the plural unless the context clearly indicates otherwise, and furthermore, it is to be understood that the terms "comprises" and/or "comprising" when used in this specification are taken to specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof.
The relative arrangement of the components and steps, numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless it is specifically stated otherwise. Meanwhile, it should be clear that the dimensions of the respective parts shown in the drawings are not drawn in actual scale for convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail, but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any specific values should be construed as merely illustrative, and not a limitation. Thus, other examples of the exemplary embodiments may have different values. It should be noted that like reference numerals and letters refer to like items in the following figures, and thus once an item is defined in one figure, no further discussion thereof is necessary in subsequent figures.
In the description of the present invention, it should be understood that the azimuth terms such as "front, rear, upper, lower, left, right", "transverse, vertical, horizontal", and "top, bottom", etc., are generally based on the azimuth or positional relationships shown in the drawings, and are merely for convenience of describing the present invention and simplifying the description, and these azimuth terms do not indicate or imply that the apparatus or elements to be referred to must have a specific azimuth or be constructed and operated in a specific azimuth, and thus should not be construed as limiting the scope of the present invention in that the azimuth terms "inside and outside" refer to inside and outside with respect to the outline of each component itself.
Spatially relative terms, such as "above," "upper" and "upper surface," "above" and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations in use or operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements described as "above" or "over" other devices or structures would then be oriented "below" or "beneath" the other devices or structures. Thus, the process is carried out, the exemplary term "above" may be included. Upper and lower. Two orientations below. The device may also be positioned in other different ways (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.
In addition, the terms "first", "second", etc. are used to define the components, and are only for convenience of distinguishing the corresponding components, and the terms have no special meaning unless otherwise stated, and therefore should not be construed as limiting the scope of the present invention.
As shown in fig. 1, the embodiment of the invention discloses a system for refrigerating a container by combining ship LNG and carbon capture, which comprises:
an LNG system for processing LNG, vaporizing LNG for use as fuel,
CO 2 generation and capture system for carbon capture recovery of CO 2 generated after LNG gasification combustion, CO 2 release and liquefaction system for liquefaction of recovered CO 2,
A dry ice generation and storage system for processing liquid CO 2 into dry ice for storage, and,
A liquid CO 2 container refrigeration cooling system for delivering liquid CO 2 to a container cooled container refrigeration.
According to the invention, through the mutual heat exchange of a plurality of systems, LNG is gradually heated, CO 2 is recycled, and the heat exchange is performed for a plurality of times, so that dry ice is generated, and the efficient utilization of energy is realized.
The LNG system comprises an LNG fuel supply unit 1 and a gas treatment unit 4, an LNG-CO 2 heat exchanger 3 is arranged between the LNG fuel supply unit and the gas treatment unit, a heat exchange pipeline is arranged between the LNG fuel supply unit and the LNG-CO 2 heat exchanger, the heat exchange pipeline is connected with a container dry ice storage box group, and a container dry ice storage box temperature control valve 2 is arranged on the heat exchange pipeline and is used for adjusting the flow of LNG entering a dry refrigerator.
The CO 2 generation and capture system comprises a gas utilization device 5 and a combustion exhaust CO 2 capture unit 6, wherein the gas utilization device is connected with the output end of the LNG system, and the combustion exhaust CO 2 capture unit is connected with a CO 2 release and liquefaction system.
The CO 2 release and liquefaction system comprises a CO 2 release unit 7 and a CO 2 liquefaction unit 8, and a pipeline between the CO 2 release unit and the CO 2 liquefaction unit exchanges heat through an LNG-CO 2 heat exchanger.
The dry ice generating and storing system comprises a first liquid CO 2 pump 9.1, a dry ice generating unit 10 and a container dry ice storage tank (group) 11, wherein the input end of the first liquid CO 2 pump is connected with a CO 2 release and liquefying system, the output end of the first liquid CO 2 pump is connected with a dry ice generating unit, and the dry ice generating unit is used for solidifying CO 2 and storing solidified dry ice in the container dry ice storage tank.
The liquid CO 2 container refrigeration box cooling system comprises a second liquid CO 2 pump 9.2, a container refrigeration box temperature control valve 12, a container refrigeration box (group) 13 and a liquid CO 2 temperature control valve 14, wherein the input end of the second liquid CO 2 pump is connected with a CO 2 release and liquefaction system, one output end of the second liquid CO 2 pump is connected with the container refrigeration box, the other output end of the second liquid CO 2 pump bypasses the container refrigeration box and is connected to a container refrigeration box output pipeline, the container refrigeration box temperature control valve is arranged between the second liquid CO 2 pump and the container refrigeration box and is used for switching the liquid CO 2 to be conveyed to a corresponding pipeline, the container refrigeration box output pipeline is connected with a liquid CO 2 temperature control valve, one output end of the liquid CO 2 temperature control valve is connected with a dry ice generating and storing system, the flow entering the dry refrigerator is reduced when the liquid CO 2 is supercooled, the flow entering the dry refrigerator is increased when the liquid CO 2 is overheated, and the other output end of the liquid CO 2 temperature control valve is connected with the CO 2 release and the second liquid CO 2 input end of the liquid CO system.
The invention also discloses a container refrigeration method combining ship LNG and carbon capture, which comprises the following steps:
The LNG system, the dry ice generating and storing system and the liquid CO 2 container refrigeration storage cooling system realize interactive heat exchange through the container dry ice storage box group, LNG is heated once, and the dry ice generating and storing system and the liquid CO 2 container refrigeration storage cooling system are cooled;
the LNG system and the CO 2 release and liquefaction system realize heat exchange interaction through the LNG-CO 2 heat exchanger, LNG is heated secondarily, and CO 2 is cooled and liquefied.
LNG gasification is used as fuel, and CO 2 generated after LNG gasification combustion is subjected to carbon capture and recovery by a CO 2 generation and capture system;
The group of container refrigeration is cooled by liquid CO 2, liquid CO 2 is heated, and the container refrigeration is cooled.
Acquiring temperature data through a set temperature control system;
In order to ensure proper temperature of the container refrigeration box group, based on the collected temperature data, a container refrigeration box temperature control valve is adjusted to adjust a pipeline, the entering amount of liquid CO 2 is reduced when the refrigeration box is supercooled, and the entering amount of liquid CO 2 is increased when the refrigeration box is overheated;
in order to ensure proper temperature of the liquid CO 2 cooled by the dry ice, a liquid CO 2 temperature control valve is regulated based on the acquired temperature data to adjust a pipeline, the flow entering a dry refrigerator is reduced when the liquid CO 2 is supercooled, and the flow entering the dry refrigerator is increased when the liquid CO 2 is overheated;
In order to ensure that the temperature of the container dry ice storage box group is proper, the opening degree of a temperature control valve of the container dry ice storage box is adjusted based on collected temperature data, the LNG flow entering a dry refrigerator is reduced when the dry ice is supercooled, and the LNG flow entering the dry refrigerator is increased when the dry ice is overheated.
It should be noted that the above embodiments are merely for illustrating the technical solution of the present invention and not for limiting the same, and although the present invention has been described in detail with reference to the above embodiments, it should be understood by those skilled in the art that the technical solution described in the above embodiments may be modified or some or all of the technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the present invention.
Claims (8)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411627422.1A CN119468576A (en) | 2024-11-14 | 2024-11-14 | System and method for refrigerating container by combining ship LNG and carbon capture |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202411627422.1A CN119468576A (en) | 2024-11-14 | 2024-11-14 | System and method for refrigerating container by combining ship LNG and carbon capture |
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| Publication Number | Publication Date |
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| CN119468576A true CN119468576A (en) | 2025-02-18 |
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| CN202411627422.1A Pending CN119468576A (en) | 2024-11-14 | 2024-11-14 | System and method for refrigerating container by combining ship LNG and carbon capture |
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| CN (1) | CN119468576A (en) |
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- 2024-11-14 CN CN202411627422.1A patent/CN119468576A/en active Pending
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