Determination of mechanical impurity content in petroleum products

The content of mechanical impurities is a key indicator for measuring the purity of petroleum products. It refers to solid or semi-solid impurities in petroleum products that are insoluble in specified solvents. These impurities may cause equipment wear, clog oil circuits, and affect the performance of petroleum products and the service life of equipment.

The determination of mechanical impurities in petroleum products should follow a specific process: First, weigh a certain amount of the sample, dissolve it in the corresponding solvent, then filter it with a constant-weight filter paper or microporous glass filter. The residue left on the filter medium is the mechanical impurity. Finally, calculate the content of the impurity in the petroleum product by weighing its weight. The determination of different types of petroleum products (such as light oil, heavy oil, and lubricating oil) requires the selection of appropriate solvents and operating parameters based on their characteristics to ensure the accuracy of the determination results.

The SH101B automatic mechanical impurity tester (without balance) is a professional device designed and manufactured in accordance with the national standard GB/ T511-2010 "Determination of Mechanical Impurities in Petroleum and Petroleum Products and Additives (Gravimetric Method)". It is suitable for determining the mechanical impurity content in various light oils, heavy oils, lubricating oils and additives. This instrument features multiple core advantages: it is equipped with an oil-free and maintenance-free vacuum pump and a dual-channel preheating system. There is no need to connect an external vacuum pump or water bath pot. One main unit can complete the entire measurement process. Equipped with a 7-inch true-color touch screen (resolution 800×480), it offers convenient human-machine interaction. It adopts 4-channel PID temperature control, which can precisely control the preheating temperature of solvent oil and the temperature of the holding funnel. The temperature control range covers room temperature to 100℃, and the display accuracy and resolution both reach 0.1℃. It is equipped with an internal computing program that can automatically process data and save 199 sets of historical records. It comes standard with a 58mm wide micro thermal printer that supports automatic printing. The results can also be exported to a PC in CSV or Excel format via a USB flash drive for long-term storage. Some models can be optionally equipped with TCP network remote upgrade and LIMS system connection functions.

In practical applications, the operator needs to first check the instrument accessories (including 1 main unit, 2 beakers, 2 funnels, 2 suction flasks, etc.) against the packing list. Then, set the instrument parameters according to the type of sample to be tested. After weighing the sample and inputting the weight, the instrument will automatically complete the steps of dissolution, filtration, and temperature control, and finally output the result of mechanical impurity content. It has significantly enhanced the efficiency and accuracy of mechanical impurity determination in petroleum products.