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| Detection and Removal Efficiency of Oil in High-pressure Natural Gas |
| Received:April 15, 2019 Revised:July 25, 2019 |
| View Full Text View/Add Comment Download reader |
| DOI：10.7643/ issn.1672-9242.2019.07.008 |
| KeyWord:natural gas oil content oil remover |
| Author | Institution |
| ZHANG Bo |
Chongqing Gas Mine of Petro China Southwest Oil and Gas Field Company, Chongqing , China |
| RAN Hong-bin |
Chongqing Gas Mine of Petro China Southwest Oil and Gas Field Company, Chongqing , China |
| FENG Cheng-ke |
Chongqing Gas Mine of Petro China Southwest Oil and Gas Field Company, Chongqing , China |
| WANG Jun-chao |
Chongqing Gas Mine of Petro China Southwest Oil and Gas Field Company, Chongqing , China |
| XIE Qiang |
Chongqing Gas Mine of Petro China Southwest Oil and Gas Field Company, Chongqing , China |
| HE Xin |
Chongqing Gas Mine of Petro China Southwest Oil and Gas Field Company, Chongqing , China |
| LONG Yan-li |
Chongqing Gas Mine of Petro China Southwest Oil and Gas Field Company, Chongqing , China |
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| Abstract: |
| Objective To provide method for detecting oil content in high pressure natural gas. Methods The sampling device was installed in the middle of the pipeline. The inlet pressure of the pipeline was reduced to 2 MPa with a level-1 pressure relief valve, and then to 0.3 - 0.4 MPa with a level-2 pressure relief valve. The flow rate was controlled at 18-20 L/min with a flow meter. The sampling time was 30-50 min. When the gas passed through the sampling device, oil in the gas was trapped in the sampling filter membrane for sampling. The sampled filter membrane was removed and then put into an extraction beaker, to fully extract the oil. The extracted solution was poured into a cuvette which was placed on an oil content analyzer to measure the oil content of gas. Results The oil content of the compressed natural gas passed through the degreaser was high. The minimum volume fraction was 7.7×10-6, the maximum of it was 12.1×10-6, far in excess of 4×10-6 which was specified in the degreaser technology agreement. Test results showed that the oil content at the degreaser outlet was 2-3 times more than design index. The degreasing effect was poorer. Conclusion Methods for decompression sampling, extraction and detection are proposed. The field test shows that this method can accurately measure the oil content of high pressure gas. Field tests verify that it is feasible to use the oil detection method in degreasing effect assessment. |
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