Device and method for automatically detecting acid value of petroleum product through reflux method

Abstract

The invention discloses a device and method for automatically detecting the acid value of a petroleum product through a reflux method, belonging to the technical field of analysis instruments of petroleum products. The device comprises a titration cell (7), a stirring device and a heating device arranged at the bottom of the titration cell (7), and a titration apparatus arranged above the titration cell and is characterized in that the bottom of the titration cell (7) extends outwards to form a liquid separation pool (21), photoelectric detection devices are fixed on two sides of the liquid separation pool, and a titration reflux interface is formed in the opening of the titration cell (7). The method comprises the following detection steps that: the device enters a working state and initializes to set functions, the device begins the detection work, an operator selects whether to clean the device before shut down or perform the next test after the detection, and the device performs the next operation according to the selection of the operator. The reflux method is adopted by the device and method disclosed by the invention, steps, such as cleaning, liquid adding, heating, stirring, measuring and metering are automatically finished in the same titration cell, and the detection precision is higher.

Description

technical field [0001] The invention discloses an automatic detection device and a detection method for the acid value of petroleum products using a reflux method, belonging to the technical field of petroleum product analysis instruments. It specifically relates to an automatic detection device and detection method for the acid value of petroleum products by using the reflux method to detect the acid value of petroleum products, which can complete functions such as automatic sampling, automatic liquid addition, automatic metering, automatic measurement, automatic cleaning, and automatic liquid discharge. . Background technique [0002] The acid value of petroleum products is an important indicator for testing petroleum products. When testing the acidity of petroleum products, first heat a certain amount of the product to be tested and the corresponding proportion of the extract, add the indicator after boiling, and drop the neutralizer into the liquid while stirring contin...

AI Technical Summary

Problems solved by technology

[0003] In the prior art, two methods are mainly used to detect the acid value of petroleum products: (1) manual detection, the defect of this method is that the work is cumbersome, the workload is large and the error is large; (2) through the automatic detection instrument Automatic detection, detect the color of the liquid to be detected through the photosensitive device

However, when using the automatic detection method, if the radius of the container containing the liquid to be detected is small, it is inconvenient to stir the liquid, and uneven stirring will occur; if the radius of the container is large, the current light-sensing technology is difficult Detection through thicker containers

At present, the commonly used method is to fully mix and boil the product to be tested and the extract, and then extract it into another container with a smaller radius for titration neutralization test. However, when using this method, during the extraction process, first, there will be The loss of temperature, especially when the room temperature is low, and the second is that a certain amount of liquid will be left on the wall of the pumped tube, which will also cause a large measurement error

Images