RU2268285C1 - Water-oil mixture setting process control device - Google Patents

Abstract

FIELD: refining of hydrocarbon oils by electric or magnetic means, by irradiation or by using microorganisms, particularly for complex oil conditioning.

SUBSTANCE: device comprises level sensor connected with control valve through regulator. The valve is installed in water discharge line, which draws water from separator sump. The water level sensor is located in vertical expanded section of pressure water pipe having lower end arranged in water accumulation area. The water level sensor is connected to the regulator. Signal characterizing predetermined water level in pressure water pipe is supplied to the second input of water level sensor. Regulator input is connected to control valve installed in water discharge line. Upper part of pressure water pipe is linked to gas zone of separator sump through gas equalizing line.

EFFECT: increased quality and reliability of process control due to increased accuracy of parameter to be regulated measuring.

1 dwg

Description

The invention relates to the automation of technological processes, in particular to devices for regulating the process of sludge oil-water mixture, and can be used in installations for the comprehensive preparation of oil.

A device for automatically controlling the process of sludge oil emulsion containing two sensors for measuring the differential pressure of the hydrostatic pressure between two points located in the emulsion zone and the water zone (Author's certificate No. 722936, class C 10 G 33/08, G 05 D 27/00, Bull. No. 11, 1980).

The disadvantage of this device is the low accuracy of the regulation of the process of sludge oil-water mixture.

Closest to the claimed is a device for regulating the process of sludge oil-water mixture containing the level of the interface “oil-water”, located in the emulsion and aqueous phases of the liquid and connected through a regulator with a control valve on the water drainage line from the sump, a sensor for measuring the rate of deposition of droplets water in an oil emulsion with a secondary device, the output of which is connected to the camera "correction" of the regulator of the level of separation of phases of the oil emulsion and water, a regulator of water concentration connected to the sensor the concentration of water in the oil emulsion, which is installed at the outlet of the sump (Copyright certificate No. 857234, class C 10 G 33/08, G 05 D 27/00, Bull. No. 31, 1981).

The disadvantage of this device is the low accuracy of regulation of the sludge of the oil-water mixture due to the lack of a clear water-oil interface, which in many cases is implicitly expressed and blurred in height. This effect is most noticeable in pipe separators, settlers, the ratio of length and diameter in which is 40: 1. The disadvantage is the complexity of implementation and the low reliability of regulation due to the oversaturation of the device with measuring instruments and sensors, for example, sensors for controlling the rate of deposition of water droplets and the concentration of water in the oil-water mixture.

The objective of the invention is to improve the quality of regulation of the process of sludge oil-water mixture by improving the accuracy of measuring the adjustable parameter - the proportion of water in the oil-water mixture and improving the reliability of regulation of the sludge process.

The technical result is an increase in the purity of the separated components of the oil-water mixture, an increase in the reliability and accuracy of regulation, which is ensured by the formation of information on the main adjustable parameter - the proportion of water in the oil-water mixture with just one water level sensor, the possibility of using the device in low ambient temperatures due to the placement of the water pipe in the separator-settler, as well as the possibility of using the device in both capacitive and tube separators-sediment nicknames.

The specified technical result is achieved by the fact that in the known device for regulating the process of separation of the oil-water mixture containing a water level sensor, connected through a regulator to a control valve on the water drainage line from the separator-sump, according to the invention, the water level sensor is installed in a vertical expanded section of the water pipe, lower the end of which is located in the zone of water accumulation, and is connected to a regulator, to the second input of which a signal of the set value of the water level in the water pipe is applied and its outlet is connected to the inlet of the control valve on the water drainage line, in addition, the upper part of the water pipe by a gas equalization line is connected to the gas zone of the separator-settler.

The drawing shows a device for regulating the process of sludge oil-water mixture.

The device comprises a water level sensor 1, located in the upper expanded part of the water pipe 2, the lower end of which is located in the water storage zone of the separator-settler 3. The water pipe 2 is placed in the separator-settler 3 near the overflow partition 4. The water level sensor 1 is connected to a regulator 5, to the second input of which a signal of a set value of the water level in the water pipe 2 is supplied. The output of the regulator 5 is connected to a control valve 6 on the water discharge line 7 from the separator-settler 3. In addition, the upper part of the water pressure pipe 2 gas equalization line 8 is connected to the gas zone of the separator-settler 3.

The device operates as follows.

The oil-water mixture enters the separator-settler 3, from the bottom of which water is discharged along the water discharge line 7, and oil is discharged from above through the drain wall 4. The hydrostatic pressure of the oil-water mixture is equalized by the hydrostatic pressure of the water in the water pipe 2 and is measured by the water level sensor 1. A change in the proportion of water in the oil-water mixture leads to a change in its hydrostatic pressure, a measure of which is the hydrostatic pressure of the water in the water pipe 2. The signal from the water level sensor 1 is supplied to the input of the regulator 5, in which this signal is compared with the set value of the water level, and by the difference of these values at the output of the regulator 5, a control signal is generated to regulate conductive valve 6 for draining water line 7 from the separator 3. Gas-settler zone from the gas separator-settler 3 through line 8 is given equalizing consumer.

The device is easy to implement, as all measuring instruments and materials used in it are mastered by industry.

Claims (1)

A device for regulating the process of separation of the oil-water mixture containing a water level sensor connected via a regulator to a control valve on the water discharge line from the separator-settler, characterized in that the water level sensor is installed in a vertical expanded section of the water pipe, the lower end of which is located in the accumulation zone water, and connected to a regulator, the second input of which receives a signal of a set value of the water level in the water pipe, and its output is connected to a control valve on the drain line water, in addition, the upper part of the water pipe by a gas equalization line is connected to the gas zone of the separator-settler.