Online sampling device for oil pipeline

Abstract

The invention relates to an online sampling device for an oil pipeline. A section of process pipeline is arranged on a main pipeline, an inlet end of the process pipeline is connected with a sampling probe, an outlet end of the process pipeline is connected with a nozzle, and the sampling probe and the nozzle are all connected to the main pipeline; a sampling loop pipeline is in bypass connection with the process pipeline behind sampling pumps, representative samples are taken from the sampling loop pipeline, and residual liquids finally converge to the main pipeline. By means of the online sampling device, reliable operation, real-time continuous sampling, accurate sample quantity and precise loop flow control can be realized, and the requirements for representative samples, automatic sampling process and precise system control are met finally.

Description

technical field [0001] The invention relates to an online sampling device for an oil pipeline, belonging to the technical field of quality detection and pipeline sampling systems. Background technique [0002] For the on-line sampling technology of oil pipelines, the traditional methods are manual sampling or bypassing the main oil pipeline, setting sampling pumps and sampling equipment on the bypass, and then leading the bypass back into the main pipeline. [0003] The disadvantages of this kind of sampling device are: 1. Without a mixing device, it is impossible to ensure that the liquid in the pipeline is fully mixed, and the sample obtained may not be representative; 2. Without a sampling control system, it is impossible to realize the equipment status, power supply status, and sampling of the sampling system. Monitoring of loop flow rate and sampling frequency; 3. The flow measurement of the sampling loop is not performed, so it is impossible to judge whether the liquid...

AI Technical Summary

Problems solved by technology

[0003] The disadvantages of this kind of sampling device are: 1. Without a mixing device, it is impossible to ensure that the liquid in the pipeline is fully mixed, and the sample obtained may not be representative; 2. Without a sampling control system, it is impossible to realize the equipment status, power supply status, and sampling of the sampling system. Monitoring of loop flow rate and sampling frequency; 3. The flow measurement of the sampling loop is not performed, so it is impossible to judge whether the liquid flow in the sampling loop is normal; 4. Due to the low cleanliness of the pipeline medium, the impurities contained in it often block the sampling pump, resulting in sampling The failure of the pump is damaged, so that continuous online sampling cannot be realized; 5. The pump outlet pipeline is prone to backflow; 6. Without a manual sampling device, sampling cannot be performed due to system failure; 7. Without a backup circuit, the system is prone to failure; 8. Sampling container protection facilities are not set up, which is prone to dangerous accidents of sample overflow; 9. No cleaning interface is not set up, which is not conducive to system maintenance and easily pollutes samples; 10. Temperature and pressure detection instruments are not set up, and there is a lack of monitoring of loop process parameters; 11. The flow control is not realized, and the flow rate of the sampling circuit cannot be changed according to the flow rate of the main pipeline; 12. The sampling rate and the number of samples are not proportional to the flow rate in the main pipeline

Images