A visual wheel tube device for evaluating the performance of hydrate inhibitors

Abstract

The invention discloses a visual wheel tube device for evaluating the performance of hydrate inhibitors, which includes a high-pressure gas cylinder, a high-pressure stainless steel wheel tube reactor, a temperature sensor, a pressure sensor, a wireless signal transmitter, a wireless signal receiver, a speed regulating motor, Vacuum pump, walk-in high and low temperature test chamber and data acquisition recorder, computer. Compared with the traditional way of judging the formation time of hydrates by relying on temperature and pressure signals, the present invention can judge the formation time of hydrates in more than one way through torque signals and visual windows. Through the fluid flow data transmitted in real time by the pipeline endoscope and the online particle analyzer, it can be judged whether there is a blockage in the wheel tube. The invention can not only efficiently screen low-dose hydrate inhibitors, but also evaluate the performance of thermodynamic inhibitors and combined inhibitors, and is an excellent device for evaluating the performance of hydrate inhibitors.

Description

technical field [0001] The invention relates to the field of performance evaluation of hydrate inhibitors, in particular to a high-pressure visual wheel tube reaction device for evaluating the performance of hydrate inhibitors. Background technique [0002] Under low temperature and high pressure conditions, various low boiling point hydrocarbons such as methane, ethane, propane, carbon dioxide, hydrogen sulfide and other gases present in natural gas are easy to form gas hydrate when mixed with water. This gas hydrate is water and low A kind of cage-type enveloping crystal formed by light hydrocarbons with boiling point. During the extraction, processing and transportation of natural gas and oil, this clathrate hydrate can easily block pipelines. Pipeline blockage not only seriously affects the normal production of factories, but also brings more serious safety and environmental pollution problems. [0003] At present, the most effective way to inhibit the formation of natu...

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Problems solved by technology

The high-pressure reactor with stirring replaces the flow of fluid in the actual pipeline with the disturbance of the solution excited by stirring, which is difficult to simulate the complex conditions of actual operation, which is quite different from the actual situation; on the other hand, this type of device uses hydration reaction to discharge Thermally induced temperature rise and gas depletion induced pressure drop signals can only initially screen hydrate kinetic inhibitors but cannot evaluate anti-aggregation performance

The large-scale circulation device driven by a pump to circulate fluid is mainly used to evaluate the safety of fluid flow. In the evaluation of inhibitors, due to the long test cycle, complex operation, large volume of injected liquid, high gas consumption, large investment, and inability to quickly and efficiently screen hydration Cannot be widely used due to shortcomings such as drug inhibitors

Invention patent US8334141B discloses a circulation experimental device with multiple loops running together, which uses magnetic fields or electromagnetic waves to excite the movement of small balls in small loops for experiments. Although this device can quickly screen low-dose hydrate inhibitors, it cannot avoid the effects of magnetic fields. There is interference with hydrate formation

Because there have been a number of relevant literature reports that the magnetic field or electromagnetic wave itself affects the formation rate of hydrates and interferes with the formation of hydrates, so the evaluation results of this evaluation device cannot objectively reflect the inhibitory effect of the hydrate inhibitor itself.

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