Particle bond destruction based on spiral-cyclone coupling mechanism for the cementation of hydrates and mud–sand

doi:10.1016/j.cjche.2024.10.024

Chinese Journal of Chemical Engineering ›› 2025, Vol. 78 ›› Issue (2): 120-130.DOI: 10.1016/j.cjche.2024.10.024

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Particle bond destruction based on spiral-cyclone coupling mechanism for the cementation of hydrates and mud–sand

Yang Tang^1,2,3,4, Qing Gu^2,3, Na Xie^2,3, Yufa He¹, Yunjian Zhou¹, Zeliang Li⁵, Guorong Wang^2,3

1. State Key Laboratory of Offshore Natural Gas Hydrates, Beijing 102200, China;
2. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China;
3. Energy Equipment Institute, Southwest Petroleum University, Chengdu 610500, China;
4. Sichuan Science and Technology Resources Sharing Service Platform, Chengdu 610500, China;
5. PetroChina Southwest Oil and Gasfield Company Northeast Sichuan Gas Field, Chengdu 610500, China

Received:2024-05-24 Revised:2024-10-11 Accepted:2024-10-12 Online:2024-12-15 Published:2025-02-08
Supported by:
This work was funded by the State Key Laboratory of Natural Gas Hydrate of China (2022-KFJJ-SHW); the National Key Research and Development Program of China (2021YFC2800903); the National Natural Science Foundation of China (52004235); the National Natural Science Foundation General Program of China (52374011); the Miaozi Engineering Cultivation Project of Sichuan Science and Technology Department of China (MZG20230127).

Particle bond destruction based on spiral-cyclone coupling mechanism for the cementation of hydrates and mud–sand

Yang Tang^1,2,3,4, Qing Gu^2,3, Na Xie^2,3, Yufa He¹, Yunjian Zhou¹, Zeliang Li⁵, Guorong Wang^2,3

1. State Key Laboratory of Offshore Natural Gas Hydrates, Beijing 102200, China;
2. School of Mechatronic Engineering, Southwest Petroleum University, Chengdu 610500, China;
3. Energy Equipment Institute, Southwest Petroleum University, Chengdu 610500, China;
4. Sichuan Science and Technology Resources Sharing Service Platform, Chengdu 610500, China;
5. PetroChina Southwest Oil and Gasfield Company Northeast Sichuan Gas Field, Chengdu 610500, China

通讯作者: Yang Tang,E-mail:tangyanggreat@swpu.edu.cn
基金资助:
This work was funded by the State Key Laboratory of Natural Gas Hydrate of China (2022-KFJJ-SHW); the National Key Research and Development Program of China (2021YFC2800903); the National Natural Science Foundation of China (52004235); the National Natural Science Foundation General Program of China (52374011); the Miaozi Engineering Cultivation Project of Sichuan Science and Technology Department of China (MZG20230127).

Abstract

Abstract: Weak cementation between natural gas hydrates and mud–sand seriously affects the solid-fluidized mining of natural gas hydrates. In this study, we analyze the debonding of natural gas hydrate sediment (NGHS) particles by applying the principle of spiral-cyclone coupling separation. To achieve this, weakly cemented NGHS particle and mechanical models were established. In the flow field of the spiral-cyclone flow-coupling separator, the motion characteristics of the weakly cemented NGHS particles and the destruction process of the cementation bond were analyzed. The destruction of the bonds mainly occurred in the spiral channel, and the destruction efficiency of the bonds was mainly affected by the rotational speed. Collision analysis of the particles and walls showed that when the velocity is 10–16 m·s^-1, the cementation bond can be broken. The greater the speed, the better the effect of the bond fracture. The breaking rate of the cementation bonds was 85.7%. This study is significant for improving the degumming efficiency in natural gas hydrate exploitation, improving the recovery efficiency of hydrates, and promoting the commercialization of hydrate solid fluidization exploitation.

Key words: Natural gas hydrate, Spiral-cyclone, Model, Weakly cemented NGHS particles, Cementation bond, Numerical analysis

摘要： Weak cementation between natural gas hydrates and mud–sand seriously affects the solid-fluidized mining of natural gas hydrates. In this study, we analyze the debonding of natural gas hydrate sediment (NGHS) particles by applying the principle of spiral-cyclone coupling separation. To achieve this, weakly cemented NGHS particle and mechanical models were established. In the flow field of the spiral-cyclone flow-coupling separator, the motion characteristics of the weakly cemented NGHS particles and the destruction process of the cementation bond were analyzed. The destruction of the bonds mainly occurred in the spiral channel, and the destruction efficiency of the bonds was mainly affected by the rotational speed. Collision analysis of the particles and walls showed that when the velocity is 10–16 m·s^-1, the cementation bond can be broken. The greater the speed, the better the effect of the bond fracture. The breaking rate of the cementation bonds was 85.7%. This study is significant for improving the degumming efficiency in natural gas hydrate exploitation, improving the recovery efficiency of hydrates, and promoting the commercialization of hydrate solid fluidization exploitation.

关键词: Natural gas hydrate, Spiral-cyclone, Model, Weakly cemented NGHS particles, Cementation bond, Numerical analysis

Yang Tang, Qing Gu, Na Xie, Yufa He, Yunjian Zhou, Zeliang Li, Guorong Wang. Particle bond destruction based on spiral-cyclone coupling mechanism for the cementation of hydrates and mud–sand[J]. Chinese Journal of Chemical Engineering, 2025, 78(2): 120-130.

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Particle bond destruction based on spiral-cyclone coupling mechanism for the cementation of hydrates and mud–sand

Particle bond destruction based on spiral-cyclone coupling mechanism for the cementation of hydrates and mud–sand

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