SU722936A1 - Method of automatic control of oil emulsion settling process - Google Patents

Description

one

The invention relates to the regulation of the level of separation of the phases of oil and water in the process of sludge oil emulsion and can be used in the oil industry and the oil refining industry.

There is a method of controlling the level of separation of the phases of oil and water using capacitive sensors with an impact on the flow rate of discharged water l.

However, over time, resinous substances that significantly affect the measured permeability accumulate on the surface of the sensing element, and as a result, the control accuracy decreases significantly. In addition, limestone does not take into account the concentration of water in the oil emulsion, which leads to a decrease in the accuracy of the regulation of the true level of separation of the oil and water phases.

Closest to the invention is a method for controlling the sludge process, consisting in controlling the level of separation of the oil and water phases depending on the hydrostatic pressure difference measured between two predetermined TO4KaN-m located in the upper and lower parts of the settler 2.

The disadvantage of this method is that it does not allow for a change in the concentration of plaste salts. In addition, the hydrostatic pressure of water in the emulsion phase of oil is not taken into account. These factors significantly affect the density of the medium and, consequently, decrease the accuracy of controlling the level of separation of the phases of oil and water. The reduction in the accuracy of controlling the level of separation of the phases of oil and water significantly affects the sludge process, and hence the quality of the oil being processed.

The purpose of the invention is to improve the accuracy of controlling the level of separation of the phases of oil and water during sludge.

The goal is achieved by measuring the density of water discharged from the sump, determining the average density of the emulsion water between the specified points from 3 measured density of discharged water, determining the ratios of the measured value of the differential pressure and the difference between the densities of discharged water and oil emg and depending on the ratio found, regulate the level of separation of the phases of oil and water. The drawing shows a diagram explaining the operation of a method for automatically controlling the process of a sludge emulsion. The method is carried out as follows. The pipeline enters the sump 1 oil per emulsion with a high concentration of water. Sediment with oil with a small concentration of water flows out of the sump. The hydrostatic pressure in the emulsion phase is measured by sensor 2. To increase the sensitivity of the differential measurement and the temperature com- plete variation of the density H1x: the hydrostatic pressure measured by sensor 2 is subtracted from the hydraulic pressure of the oil. emulsion in the separation vessel 3, located inside the sump. Hydrostatic pressure in the water phase is measured by sensor 4. To calculate the hydrostatic pressure difference, sensors 3 and 4 are connected to device 5. The calculation of the ratio of hydrostatic pressure difference and water density difference is measured by computing device 6. The computer also receives the signal is proportional to the value of the density in the air measured by the sensor 7 and the device 8. The output of the computing device 6 enters the level 9 tiefjmi and water level controller 9, which is connected to the executive; body 1O. Hydrostatic pressure with sensors 2 and 4 is determined by the formula p - n V n V L - e n, (g From this we have il, -, 6 where H is the level of oil and water phase separation between sensors 2 and 4: H - distance between sensors 2 and .4: Hydrostatic pressure across the sensors between sensors 2 and 4: and e, respectively, the density of salt water and oil emulsion between sensors 2 and 4. Thus, the level of separation of oil and water between two given points is determined by differential hydrostatic pressure between these points and the difference in the density of water and emulsion Method of automatic control of the oil emulsion sludge process by adjusting the level of separation of oil and water depending on the difference in hydrostatic pressures between two points located in the upper and lower parts of the sump, characterized in that the level of separation of oil and water by measuring the hydrostatic pressure of water in the emulsion phase of oil measures the density of water discharged from the sump is determined by the measured density of the discharge Vai average density water oil emulsion between predetermined points opredel5pot ratio measured value differential hydrostatic pressure and density differences .sbrasyvaemoy water and oil emulsion, and depending on the determined ratio is controlled separation level of oil and water phases. Sources of information taken into account in the examination 1. Automation of the branch preparation of transport and transport, Gostopizdat, 1969, p. 8О-81. 2, ibid.

Claims (1)

A method for automatically controlling the process of sludge oil emulsion by adjusting the level of separation of the phases of oil and water depending on the difference in hydrostatic pressure between two points located in the upper and lower parts of the sump, characterized in that, in order to increase the accuracy of regulation of the level of phase separation of oil and water by taking into account the hydrostatic pressure of the water in the emulsion phase of the oil, the density of the water discharged from the sump is measured, the average density is determined from the measured density of the discharged water l the oil emulsion between the given points, determine the ratio of the measured value of the hydrostatic pressure drop and the density difference. discharged water and oil emulsion and depending on the found ratio regulate the level of separation of oil and water phases.