Influence of Mine Environmental Factors on the Liquid CO2 Pipeline Transport System with Great Altitude Difference

Guansheng Qi; Hao Hu; Wei Lu; Lulu Sun; Xiangming Hu; Yuntao Liang; Wei Wang

doi:10.3390/ijerph192214795

Influence of Mine Environmental Factors on the Liquid CO₂ Pipeline Transport System with Great Altitude Difference

Int J Environ Res Public Health. 2022 Nov 10;19(22):14795. doi: 10.3390/ijerph192214795.

Authors

Guansheng Qi^{1

2}, Hao Hu^{1

2}, Wei Lu^{1

2

3}, Lulu Sun¹, Xiangming Hu^{1

2}, Yuntao Liang⁴, Wei Wang⁴

Affiliations

¹ College of Safety and Environmental Engineering, Shandong University of Science and Technology, Qingdao 266590, China.
² State Key Laboratory of Strata Intelligent Control and Green Mining Co-Founded by Shandong Province and the Ministry of Science and Technology, Shandong University of Science and Technology, Qingdao 266590, China.
³ College of Safety Science and Engineering, Anhui University of Science and Technology, Huainan 232063, China.
⁴ State Key Laboratory of Coal Mine Safety Technology, China Coal Technology & Engineering Group, Shenyang Research Institute, Shenyang 113122, China.

Abstract

To prevent coal spontaneous combustion and store CO₂ in the coal mine, it is necessary to establish a fire-prevention pipeline transport system which continuously injects a large amount of liquid CO₂ from the ground to the underground area directly. At present, few studies are focused on the law of liquid CO₂ transport with great altitude difference. Moreover, the complex transport environment in the coal mine affects the design and application of the pipeline transport system for ground direct injection of liquid CO₂. This study explores the influence of environmental factors at different depths in the coal mine on the liquid CO₂ transport. Excessive altitude difference, ambient temperature and airflow velocity may lead to the boiling of liquid CO₂ during pipeline transport and a sudden drop in CO₂ temperature and pressure, which may cause danger in the pipeline transport system. The critical insulation thickness is determined based on the occurrence of the boiling of CO₂. In addition, the influence law of adding an insulating layer of different thicknesses to the CO₂ pipeline system is obtained. This study is of great significance to the establishment of a pipeline system that safely transports liquid CO₂ from the ground to the underground mine.

Keywords: coal mine; environmental factors; great altitude difference; liquid CO2; pipeline transportation.

Publication types

Research Support, Non-U.S. Gov't

MeSH terms

Altitude
Carbon Dioxide*
Coal
Coal Mining*
Spontaneous Combustion

Substances

Carbon Dioxide
Coal

Grants and funding

This research was funded by the National Natural Science Foundation of China (Grant No. 51804185 and Grant No. 51974178) and the Focus on Research and Development Plan in Shandong Province (Grant No. 2019GSF111060).