High-pressure high-temperature liquid viscosity measuring device and method

Abstract

The invention discloses a high-pressure high-temperature liquid viscosity measuring device and method. The measuring device comprises a high-pressure high-temperature system and a measuring system, wherein the measuring system comprises a driving motor, a torque sensor, a driving magnetic barrel, an induced magnetism barrel, a rotating shaft and a stirring paddle; one end of the torque sensor is connected with the driving motor, the other end of the torque sensor is connected with the driving magnetic barrel, and the driving magnetic barrel rotates along the torque sensor; the induced magnetism barrel is positioned in the driving magnetic barrel and can rotate along the driving magnetic barrel under the magnetic action; one end of the rotating shaft is connected with one end, which is far from the torque sensor, of the induced magnetism barrel, the other end of the rotating shaft is connected with the stirring paddle, and a part of the rotating shaft is positioned in the high-pressure high-temperature system; the stirring paddle is positioned in the high-pressure high-temperature system, and the stirring paddle comprises multiple blades which are symmetrically arranged around the rotating shaft. The measuring device provided by the invention can accurately detect the liquid viscosity under a high-pressure high-temperature condition.

Description

technical field [0001] The invention relates to a high-temperature and high-pressure liquid viscosity measuring device and a measuring method, which belong to the field of measuring the fluidity of high-temperature and high-pressure liquids, in particular to a viscosity measuring device and a measuring method suitable for non-Newtonian fluids in an unstable state, especially oil-coal slurry . Background technique [0002] China is a country rich in coal and poor in oil. In recent years, due to the sharp rise in world oil prices and the continuous consumption of domestic oil resources, China needs to import more than half of its oil every year, and its dependence on foreign countries is high. No matter from an economic or strategic point of view See, there is a need to find an alternative that can partially replace petroleum fuels. [0003] Lignite or young bituminous coal can be transformed into liquid fuels and other chemicals by pyrolysis and hydrogenation in a reactor un...

AI Technical Summary

Problems solved by technology

In the direct coal liquefaction process, after the high-concentration oil-coal slurry passes through the preheater, its temperature will rise to about 400°C. At this time, some bridge bonds between the coal structural units have broken, thus generating free radicals , free radicals are very unstable, if there is no high-pressure hydrogen environment and the separation of solvent molecules, free radicals will condense into macromolecules again, resulting in significant changes in the rheological properties of the oil-coal slurry, and in severe cases, mutation coking will occur and the delivery pipeline will be blocked , which increases the resistance of the entire system and deteriorates the heat and mass transfer conditions, thereby affecting the normal operation of the entire coal liquefaction process system

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