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Method for minimizing oil product metering errors

A technology of metering errors and oil products, which is applied in the field of oil metering, can solve the problems of large oil metering errors in oil tanks, and achieve the effect of improving accuracy and avoiding large oil metering errors

Inactive Publication Date: 2017-06-20
SICHUAN XILIN OIL SUPPLIES EQUIP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for reducing the measurement error of oil products, and solve the problem that the temperature and density of each part are not the same due to the large volume of the oil tank, oil stratification, etc. The problem

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] The method for reducing oil metering error of the present invention comprises the following steps:

[0027] Step A: Carry out periodic verification of measuring instruments, and give correct correction values ​​to worn measuring instruments, said measuring instruments include measuring oil dipstick, density meter, thermometer and flow metering device;

[0028] Step B: Perform oil stabilization treatment on the oil in the oil tank that has completed the oil feeding operation, so that the oil level is stable and does not fluctuate, and the foam on the liquid surface disappears;

[0029] Step C: Measure the height h of the oil in the oil tank with a measuring ruler, and then find out the volume V of the oil in the oil tank according to the tank volume table t ;

[0030] Step D: Use the sampling device to sample the oil at the upper, middle and lower positions of the oil tank, and place them in different measuring cylinders respectively, and then measure the density and te...

Embodiment 2

[0036] The present invention is based on embodiment 1, and the present invention is further described.

[0037] The method of the present invention to reduce the measurement error of oil products, said ρ 上 , ρ 中 and ρ下 The measurements are the average value obtained by measuring the temperature of the oil in the corresponding measuring cylinder for two consecutive times, and the measuring cylinder is kept warm during the measurement, so that the temperature difference of the oil in the measuring cylinder does not exceed 0.5 degrees Celsius during the two measurements.

[0038] Further, in the oil stabilization treatment, the stabilization time for the oil tank is not less than 15 minutes. The stabilization time of the liquid level, tanker, horizontal oil tank: no less than 15 minutes for light oil, no less than 30 minutes for heavy oil; vertical oil tank: no less than 30 minutes for light oil, not less than 30 minutes for heavy oil in 3 hours. If the measurement operation i...

Embodiment 3

[0040] The present invention is based on embodiment 1, and the present invention is further described.

[0041] In the method of reducing the measurement error of oil products in the present invention, in the measurement of the oil height h, the oil height needs to be measured twice consecutively, and when the difference between the two measured oil heights is not greater than 1 mm, the first measurement result is taken As oil high h.

[0042] Further, in the measurement of the oil height h, when the difference between the two measured oil heights is greater than 1mm, multiple measurements of the oil height are carried out until the difference between the results of two adjacent measurements is not greater than 1mm, and take The measurement result of the previous two adjacent measurements is taken as the oil height h.

[0043] In the height measurement of the oil tank, the ruler is generally lowered in the ruler tube of the gauge hole, and the position of the gauge tube is ge...

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Abstract

The invention discloses a method for minimizing oil product metering errors. The method includes the following steps: a step A, performing periodic verification on metering devices; a step B, performing oil stabilization treatment on oil; a step C, measuring the height h of the oil, and finding the volume Vt of the oil; a step D, sampling the oil at an upper position, a central position, and a lower position, and measuring the density and the temperature of the oil, and acquiring the apparent density Rho t' and the apparent temperature t', and acquiring the standard density Rho 20 according to the apparent density, the apparent temperature, and a petroleum metering conversion table; a step D, sampling the oil, putting the oil samples in an oil sample warming box to measure the oil temperature t; and a step E, calculating the mass m of the oil product in an oil tank at the temperature of 20 DEG C according to a relevant formula. Oil at different heights, in the oil tank is sampled, the density and the temperate of the oil samples is measured, the corresponding apparent density and the corresponding apparent temperature are acquired through an averaging method, the metering accuracy of the oil product can be improved, and the problem that the metering error of the oil product in the oil tank is large due to once measurement can be solved.

Description

technical field [0001] The invention relates to an oil metering method, in particular to a method for reducing oil metering errors. Background technique [0002] At present, in the trade measurement of domestic petroleum products, oil tanks are usually the main oil storage devices that need to be measured. The measurement of oil products is affected by many aspects, such as the accuracy of the measurement tool, the temperature of the oil, the volume of the oil, etc. During the custody transfer process of petroleum and its liquid products, the main gauges used must be periodically calibrated in accordance with regulations to give correct correction values. At the same time, due to the large volume of the oil tank, oil stratification and other reasons, the temperature and density of each part are not the same, resulting in large errors in the measurement of the oil in the oil tank obtained through measurement. Contents of the invention [0003] The purpose of the present i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01F22/00G01N9/00G01F25/00G01K15/00
CPCG01F22/00G01K15/005G01N9/00G01F25/20G01F25/10
Inventor 贺昶明
Owner SICHUAN XILIN OIL SUPPLIES EQUIP
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