Liquid line flow resistance force detection device and method for detecting drag reduction effect of drag reducer

Abstract

The invention discloses a liquid pipe resistance detection device which is used for evaluating the drag reduction effect of drag reduction agent. The detection device comprises a set of liquid circulation units and a detection unit; the liquid circulation unit is provided with a liquid storage tank and a circulation pipeline which is formed by a plurality of connecting pipelines and ball valves; the circulation pipeline is provided with a flexible pump and a transducer; furthermore, two ends of a measurement pipe section are respectively provided with a micro-difference pressure meter; the detection unit is electrically connected with the transducer and the micro-difference pressure meter. The liquid pipe resistance detection device adopts the flexible pump which has lower shearing strength than that of a centrifugal pump used in the prior art and is more suitable for evaluating the drag reduction effect; the liquid pipe resistance detection device uses the transducer to control the displacement of the pump, and measures the difference pressure only to simplify the detection device and the operation step, to reduce the measurement links and possible errors and to improve the reliability of results.

Description

Technical field: [0001] The invention relates to the field of rheological detection, in particular to a method for detecting and evaluating the drag reducing effect of a drag reducing agent and a liquid pipe flow resistance detection device used therein. Background technique: [0002] Drag reducing agents (DRAs) or drag reducing polymers (DRPs) are polymer compounds used to reduce fluid flow resistance. Studies have shown that DRAs from natural sources or artificially synthesized have drag-reducing properties, and their solutions are viscoelastic, and can increase the liquid flow in the pipeline to 3 times or more at an extremely low dosage (nanomolar level), so Drag reducers are widely used in many fields. After the water-soluble drag reducing agent is injected into the blood, it can improve the hemodynamics of the animal model and increase the tissue perfusion at an extremely low dosage (nanomolar level). Drag reducing agents may play a role in the treatment of cardiovas...

AI Technical Summary

Problems solved by technology

[0003] The evaluation of drag reducing performance of drag reducing agent needs to be realized through special detection device. The existing detection device uses centrifugal pump to provide the power of liquid flow, so the DRAs have a mechanical shearing effect, which can accelerate their degradation, which will affect the accuracy of detection; in addition, the existing technology uses pressure sensors and flow meters in the pipeline to measure the two parameters of pressure and flow, respectively, and there are many operating steps. prone to errors

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