RU2613385C1 - Automated control system of oil quality - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: automated control system of oil quality, comprising a feed pipeline designed to transport the incoming flow of oil and pipeline intended for a mixed oil stream, regulators installed in the respective pipelines and designed for adjusting and measuring different indicators of the oil quality in the respective oil flows, including coefficient calculators of oil density and/or oil flow, and/or sulfur content and/or chloride salts content, and/or the water content in each stream ratios to the respective indicators in the mixed stream. The inputs of each of the mentioned calculators are connected to the outputs of the respective measurers, while outputs are connected to the respective inputs of a microprocessor, designed for comparing the measured and calculated parameters with predetermined parameters and forming regulation signals of flap position in respective streams according to the comparison results. The control system of oil quality comprises at least two collectors for separate oil storage with different levels of quality, connected by technological pipelines to the feed pipeline at the input and to the pipeline for the mixed oil stream at the output. According to the invention, collectors for separate oil storage are equipped with ultrasonic acoustic transmitters which are mounted on the inner wall across the collector housing.

EFFECT: indicators of the oil quality in every collector are regulated irrespectively of the duration of the oil laying in the collector.

2 cl, 1 dwg

Description

The invention relates to means for automating the processes of transporting "oil batches" of various quality through a single pipeline with control of its quality indicators in a mixture of oil.

Due to the fact that a mixture of oil transported through one pipeline is formed from a stream of fields that differ significantly in the content of oil quality indicators, the process of compounding oil (mixing two or more oil flows to obtain a mixture with certain qualitative characteristics) in order to achieve standard values quality parameters is one of the most important areas of activity of oil pipeline transport organizations.

Compounding, as a quality management technology, solves the problem of placing additional volume of oil in flows and stabilizes the values of its quality indicators, smoothing out natural quality fluctuations characteristic of traffic flows. The use of compounding ensures stable, guaranteed oil supplies to the consignee without changing the quality indicators beyond the established limits.

A known compounding system is presented in the utility model "A system for controlling the compounding process of oils by several quality parameters" (RF patent No. 28930, published on April 20, 2003).

This oil compounding process control system contains at least two oil pipelines for transporting oil flows and an oil pipeline intended for a mixed oil flow, valves installed in the oil pipelines and designed to regulate the respective oil flows, oil density meters and / or oil flow meters, and / or oil sulfur meters, and / or oil chloride meters, and / or oil water meters, designed to measure nnyh oil parameters in the respective streams of oil. The system includes calculators of the coefficients of the ratio of density, mass fraction of sulfur, concentration of chloride salts, mass fraction of water in each stream to the corresponding values in the mixed stream, associated with a microprocessor that controls the flow rate for each stream.

The disadvantage of the system is the inability to obtain a mixture of oil with established quality indicators when using one supply pipe designed for the sequential transportation of lots of oil of different quality. In addition, in the event that oil flows with non-standard quality indicators are received, a change in the flow rate will not affect the improvement of oil quality and there is a likelihood of oil entering the mixed stream and subsequently to consumers with quality indicators that are different from the standard ones, which is excluded if a separate group of tanks with oil of various quality.

The closest in technical essence and the achieved result is an automated oil quality control system containing a supply pipeline designed to transport the incoming oil stream, and a pipeline designed for mixed oil flow, regulators installed in the respective pipelines and designed to regulate the respective oil flows, meters oil densities and / or oil flow meters and / or oil sulfur meters and / or meters ia chloride salts in oil, and / or meters of water content in oil, and / or meters of viscosity of oil, designed to measure these parameters of oil in the respective oil flows, including calculators of the coefficients of the ratio of the density of oil and / or oil consumption, and / or the sulfur content, and / or the content of chloride salts, and / or the water content in each stream to the corresponding indicators in the mixed stream, the inputs of each of these computers are connected to the outputs of the respective meters, and the outputs are connected to the corresponding inputs of a microprocessor designed to compare the measured and calculated parameters with the set and generate control signals for the position of the valves in the respective flows according to the comparison results, while the oil quality control system contains at least two tanks for separate storage of oil with different indicators of the density content, and / or sulfur, and / or chloride salts, and / or water, and / or viscosity, connected by process pipelines with an oil feed line at the inlet and with fteprovodom for mixed stream at the outlet of oil (Russian utility model patent №125362 G05D 11/02 from 27/02/2013).

The disadvantage of the system is the formation of stagnant zones in the tanks during operation, which affects the stabilization of oil quality indicators in each of the tanks.

The technical result of the claimed system is the stabilization of indicators of oil quality in each of the tanks, regardless of the duration of the oil in the tank.

The technical result is achieved by the fact that an automated oil quality control system containing a supply pipeline designed to transport the incoming oil stream and a pipeline designed for a mixed oil stream, regulators installed in the respective pipelines and designed to regulate the respective oil flows, oil density meters, and / or meters of oil consumption, and / or meters of sulfur content in oil, and / or meters of chloride salts in oil, and / or meters of water content in oil and / or meters of viscosity of oil, designed to measure these parameters of oil in the respective oil flows, including calculators of the coefficients of the ratio of oil density and / or oil flow rate, and / or sulfur content, and / or chloride content of salts , and / or the water content in each stream to the corresponding indicators in the mixed stream, the inputs of each of these computers are connected to the outputs of the respective meters, and the outputs are connected to the corresponding inputs of the micro a processor intended for comparing the measured and calculated parameters with the set and generating control signals for the position of the dampers in the respective flows according to the comparison results, while the oil quality control system contains at least two reservoirs for separate storage of oil with different indicators of the density and / or sulfur content , and / or chloride salts, and / or water, and / or viscosity, connected by process pipelines to an inlet oil pipeline and to a mixed flow oil pipeline oil outlet according to the invention for separate storage tanks are equipped with oil radiators of ultrasonic oscillations, which are mounted on the inner perimeter wall of the reservoir housing. In addition, the mode of ultrasonic vibrations is: frequency 42-48 kHz, radiation intensity 2-6 W / cm.

The technical result coincides with the technical task.

The equipment of tanks for separate storage of oil by ultrasonic oscillators, which are installed on the inner wall around the perimeter of the tank body with the regime of ultrasonic vibrations, comprising: frequency 42-48 kHz, radiation intensity 2-6 W / cm ensures the stabilization of quality indicators in each tank regardless the duration of the oil in the tank by creating a uniform distribution of oil properties over the volume of the tank.

The invention is illustrated in the drawing with the following notation:

1 - feed oil pipeline (oil pipeline designed for transported incoming oil flow); 2, 12 - oil quality control unit with the density, viscosity and oil consumption, water, chloride, sulfur content meters installed in it; 3 - tank park, consisting of at least two tanks with different quality indicators; 4 - the first tank (group of tanks); 5 - the second tank (group of tanks); 6 - collector; 7 - technological pipeline from the first reservoir (group of reservoirs); 8 - technological pipeline from the second tank (group of tanks); 9, 10 - flow controller; 11 - output oil pipeline (oil pipeline for a mixed oil flow); 12 - emitters of ultrasonic vibrations.

Tanks for separate storage of oil are equipped with emitters of ultrasonic vibrations 12, which are installed on the inner wall around the perimeter of the tank body. The optimal mode of ultrasonic vibrations is: frequency 42-48 kHz, radiation intensity 2-6 W / cm (obtained experimentally).

The system operates as follows.

When passing through a supply oil pipeline (1) and a quality control unit (2), a batch of oil, depending on the content of the oil quality parameters, enters a separate tank (group of tanks) for storage of conditioned (4) or substandard oil (5), output pipelines (7 and 8) from reservoirs (reservoir groups) are equipped with flow regulators (9 and 10).

After receiving a batch of oil, two tanks for conditioned and substandard oil are put for pumping. The required ratio of the content of each of the flows in the mixture is achieved by flow controllers (9 and 10) installed on the process pipelines (7, 8). The mixing of flows occurs in the collector (6). The control of flow regulators (9 and 10) takes place on the basis of a microprocessor signal comparing the readings of the oil quality meters installed in the quality control units at the supply and output pipelines with the standard value.

The equipment of the reservoirs with ultrasonic vibrations emitters 12, which are installed on the inner wall around the perimeter of the reservoir body, ensures the stabilization of quality indicators in each of the reservoirs, regardless of the duration of the oil in the reservoir, by creating a uniform distribution of oil properties throughout the volume of the reservoir. Under the action of ultrasonic waves, inhomogeneities that approach the interface of the media oscillate intensively and distribute the properties of oil throughout the volume, which eliminates the occurrence of stagnant zones.

Thus, unlike analogues, the proposed system provides stabilization of quality indicators in each of the tanks, regardless of the duration of oil in the tank due to the intense exposure to oil by ultrasonic waves.

Claims (2)

1. An automated oil quality control system containing an oil supply pipeline designed to transport an incoming oil stream and an oil pipeline designed for a mixed oil flow, regulators installed in the respective oil pipelines and designed to regulate the corresponding oil flows, oil density meters, and / or meters oil consumption, and / or meters of sulfur content in oil, and / or meters of chloride salts in oil, and / or meters of water content in oil, and / or oil viscosity gauges designed to measure the specified parameters of oil in the respective oil streams, including calculators of the coefficients of the ratio of oil density and / or oil consumption and / or sulfur content and / or chloride salt content and / or water content in each stream to the corresponding indicators in the mixed stream, the inputs of each of these computers are connected to the outputs of the respective meters, and the outputs are connected to the corresponding inputs of the microprocessor, intended for comparison measured and calculated parameters with specified and generating control signals for the position of the shutters in the respective flows according to the results of comparison, while the oil quality control system contains at least two reservoirs for separate storage of oil with different indicators of the density, and / or sulfur, and / or chloride salts, and / or water, and / or viscosity, connected by technological pipelines with a supplying oil pipeline at the inlet and with an oil pipeline for a mixed oil flow at the outlet, characterized in that ervuary for separate storage of oil equipped emitters of ultrasonic vibrations which are mounted on the inner wall on the perimeter of the reservoir housing. 2. The automated oil quality control system according to claim 1, characterized in that the mode of ultrasonic vibrations is: frequency 42-48 kHz, radiation intensity 2-6 W / cm.

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