METHOD OF DETERMINING CONTENT OF CONTAMINANTS IN LIQUID FLOWING IN PIPELINE Russian patent published in 2011 - IPC G01N5/00 

FIELD: chemistry.

SUBSTANCE: method of determining content of contaminants in a liquid flowing in a pipeline involves continuous collection of a portion of the liquid into a collection line, with the condition that the speed of the liquid in the inlet element of the collection device and the speed of the liquid in the pipeline where the collection device is fitted are equal. The collected liquid is then passed through the control filter of the collection line. The filtered liquid is then returned into the pipeline and measured values of the mass of contaminants deposited on the control filter of the collection line and volume of liquid passing through the pipeline and the collection line are used. Content of contaminants in the liquid flowing in the pipeline is determined after preliminary calibration using the formula: where m₁ is the mass of contaminants in the liquid passing through the pipeline; m₂ is the mass of contaminants deposited on the control filter of the collection line; V₀ is the volume of liquid passing through the pipeline - volume of liquid passing through the collection line and the control filter; k_t is a compensation factor. Preliminary calibration involves temporary connection of the outlet of the pipeline to a drain line having a control filter. The liquid with the measured volume and contaminants deposited on the control filter of the drain line and collection line are then passed through the pipeline. The compensation factor k_t is determined using the formula: where m_1t is the mass of contaminants in the liquid passing through the pipeline during calibration, and contaminants deposited on the control filter of the drain line; m_2t is the mass of contaminants deposited on the control filter of the collection line; V_0t is the volume of liquid passing through the pipeline during calibration; V_2t is the volume of liquid passing through the collection line during calibration.

EFFECT: high accuracy of determining content of contaminants in a liquid flowing in a pipeline.