Liquefied natural gas (LNG) cold energy gradient utilization system and control method

A cascade and cold energy technology, which is applied in the field of LNG cold energy cascade utilization system and control, can solve the problems of single cold energy cascade utilization project, difficult operation and many maintenance links, and process shutdown, so as to improve relative independence, temperature The effect of wide application range and low safety hazard

Pending Publication Date: 2020-05-05
BEIJING GAS GRP
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Problems solved by technology

This method realizes cascaded utilization of cold energy by combining the cold energy of LNG with the waste heat of coal-fired waste gas, but its process flexibility is poor. If the LNG power generation system or CO 2 When the liquefaction system fails, it will cause the entire process to shut down,

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  • Liquefied natural gas (LNG) cold energy gradient utilization system and control method

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Embodiment Construction

[0021] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure may be embodied in various forms and should not be limited by the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0022] figure 1 It shows a schematic structural diagram of the LNG cold energy cascade utilization system provided by the embodiment of the present invention, see figure 1 , the LNG cold energy cascade utilization system provided by the embodiment of the present invention includes:

[0023] Cold energy recovery subsystem, refrigerant expansion power generation area subsystem, cold storage area subsystem and data center area subsys...

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Abstract

The invention provides a liquefied natural gas (LNG) cold energy gradient utilization system and a control method. When an abnormal working condition appears to a certain technology of a refrigerant expansion electronic system, refrigeration storage area subsystems and data center area subsystems, it is ensured that other areas are not affected to continue production, and other refrigerant gradient technologies can stop due to the abnormal working condition of the certain technology. Thus, efficient cold energy gradient utilization is realized, a temperature utilization range is wide, the relative independentability of each technological segments of the LNG cold energy gradient utilization is improved, the operating flexibility and error-tolerant rate of an overall project are improved, the economic impact of the breakdown is reduced, safety production can be realized, the operation cost is reduced, so that the overall project is environmentally friendly, potential safety hazards are reduced to the lowest, and the implementation of other projects of a station is not affected.

Description

technical field [0001] The invention relates to the field of utilization of LNG cold energy, in particular to a cascade utilization system and control method of LNG cold energy. Background technique [0002] As environmental problems continue to become prominent, my country's energy consumption structure has also undergone corresponding changes. Liquefied natural gas (LNG) has gradually become an important strategic reserve energy due to its advantages of cleanness and environmental protection. At present, China has become the world's largest importer of natural gas, of which imported LNG accounts for 53% of the total natural gas supply. In 2018, China's total LNG imports were nearly 54 million tons, a year-on-year increase of 41.2%, and the net import increase was 16 million tons, accounting for 59.26% of the global increase, ranking first in the world. In the future, China will still be the country with the strongest LNG market demand, and China's LNG import capacity is ...

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Application Information

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IPC IPC(8): F01K27/00F01K25/10F25D3/10
CPCF01K25/10F01K27/00F25D3/10
Inventor 赖建波郭保玲邢琳琳程韦豪常旭宁王佩广
Owner BEIJING GAS GRP
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