期刊
ENERGIES
卷 15, 期 17, 页码 -出版社
MDPI
DOI: 10.3390/en15176464
关键词
pipeline pigging; pig stalling; wax resistive force; superparamagnetic nanoparticle; heating
资金
- National Natural Science Foundation of China (NNSF) [52104066]
- Natural Science Foundation of Fujian Province, China [2020J05097]
Mechanical pigging is a common wax removal technique in crude oil pipeline transportation. A superparamagnetic nanoparticle pigging system has been designed to soften wax deposits and reduce resistance, improving pigging efficiency.
Mechanical pigging is a major wax removal technique in crude oil pipeline transportation. To lower the risk of pig stalling accidents in pigging, a superparamagnetic nanoparticle (SPM-NP) pigging system that consists of an electromagnetic pig and nanopaint is designed to soften the wax deposit and reduce the wax resistive force. During pigging, the induction coil on the pig generates an alternating magnetic field, which induces heat production of the nanopaint on the pipe wall. The COMSOL software is used to simulate the temperature distribution of the wax layer. Yield stress measurements reveal that the wax layer yield stress is nearly linearly correlated to temperature. Compared with a regular pig, the SPM-NP pigging system reduces the wax resistive force by up to 20 similar to 40%, with an acceptable electrical current intensity of about 20 A in the given cases. Multiple factors affecting the wax layer temperature were analyzed. SPM-NP heating could be a promising technique for wax remediation and hydrate prevention.
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