SU1133285A1 - Method for automatic control of gas-saturated petroleum deemulsification - Google Patents

Abstract

THE METHOD OF AUTOMATIC CONTROL OF THE PROCESS OF GAS-PROCESSED OIL DEEMULSATION by adjusting the flow rate of the demulsifier into the apparatus depending on the flow rate of water discharged from the apparatus and moisture content of the discharged oil, from which, in order to improve the quality of oil preparation, the flow rate of the flow is reduced. oil and gas consumption, separated in front of the unit.

Description

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The invention relates to the primary preparation of oil, in particular, to a method for controlling the process of oil demulsification, and can be used in non-chemical chemistry.

There is a known method of controlling the process of oil demulsification by controlling the flow rate of the demulsifier depending on the flow rate of the oil and the moisture content of the input water L.

The closest to the invention in its technical essence and the effect achieved is a method for automatically controlling the process of oil de-emulsification by controlling the flow rate of the withdrawn water and moisture content of the withdrawn oil and controlling the flow rate of the deenulgator to the apparatus depending on the flow rate and moisture content of the crude oil 2f.

However, the known methods provide for a direct measurement of the flow of oil at the inlet of the apparatus, which in the case of gas-rich oil is associated with a large measurement error and a decrease in control efficiency. ,

The aim of the invention is to improve the quality of oil treatment by improving the accuracy of regulation.

The goal is achieved by the fact that according to the method of automatically controlling the process of gas emulsified oil demulsification by controlling the flow rate of the demulsifier into the apparatus depending on the flow rate of water withdrawn from the apparatus and the moisture content of the withdrawn oil, the demulsifier pressure is adjusted by the pressure of the gasified gas and the gas separated in front of the apparatus.

FIG. 1 shows a diagram of the device for implementing the proposed method J in FIG. 2 is a block diagram of a computing unit.

The scheme contains flow meters 1 and 2, respectively, of the separated gas and exhaust water, gas pressure sensor 3, exhaust oil hydrometer 4, computing unit 5, separator 6, for example, for pipe gas, demulsifier apparatus 7, demulsifier supply device 8, regulator 9, Pipeline 10 for supplying oil, pipelines 11 for supplying the demulsifier, pipelines 12 and 13, respectively

waste oil and waste water, pipe 14 of the separation of the separated gas. The outputs of the flow meters 1 and 2, the gas pressure sensor 3 and the moisture meter 4 of the withdrawn oil are connected to the inputs of the computing unit 5, the output of which is connected to the input of the regulator 9, the output of which is connected to the input of the demulsifier supply device 8.

Computing unit 5 (Fig. 2) comprises a square root extraction unit 15, the first 16, the second 17, the third 18, the fourth 19, the fifth 20 and the sixth 21 multiplications blocks, the first 22, the second 23, the third 24, the fourth 25, p 26th, sixth 27th, seventh 28th, eighth 29th, ninth 30th and tenth 31 setters constat, first 32, second 33, 34, fourth 35, fifth 36 and sixth. 37 addition blocks, first 38 and second 39 differentiation blocks built on operational amplifiers, first 40, second 41 d third 42 averaging blocks, first 43 and second 44 dividing blocks, first 45, second 46, third 47 and fourth 48 functional converters .

At the same time, blocks 16, 32, 38 and 40, blocks 15, 17, 33, 43, 34 and 41, blocks 18 and 35 and a functional converter 45, blocks 19, 36, 39, 42 and 21 are connected in series in 5, functional converters 46, 47 and 48. The second inputs of blocks 16–19 multiplication are connected respectively to the outputs of the setting units 22, 25, 28 and 30 constants. The second input of the add-on blocks 32, 33, 35 and 36 are connected respectively to the outputs of the sensor pins 23, 26, 29 and 31. The output of the setting unit 24 of the averaging interval constants is connected to the second inputs of the averaging units 40 - 42, the second inputs of the blocks 20 and 21 are connected to the output of the averaging unit 41, the second input of the division unit 43 is connected to the output of the first functional converter 45, the second input of the addition unit 34 is connected with the output of the addition unit 36, the second input of the division unit 44 is connected to the output of the constant setting units 27, the first input of the addition unit 37 is connected to the output of the division unit 43, the second input is connected with the second output of the multiplication unit 21. The output of block 37 is connected to the second input of a third functional transducer 47. The first, second, third and fourth inputs of the second functional transducer 46 are connected respectively to the outputs of multiplication blocks 20 and 21, the first functional transducer 45, and block 33. The inputs of blocks 16, 18 and 19 of the core and 15 of the extraction of the square core, which are the inputs of the computing unit 5, are connected to the outputs of the moisture meter 4 of the withdrawn oil, the sensor 3 of the gas pressure, the flow meter 2 of the withdrawn water and the flow meter of the separated gas, respectively. The output of the fourth functional converter 48 is the output of the computational unit 5. In the computational unit 5, according to its sensor signals from the sensors, the actual values are determined: the moisture content of the driven oil is L °, I where C | and P are the constant coefficients of the polynomial approximation, X c is the output signal of the moisture meter 4 of the flow rate of the separated gas Qp according to the formula r Ago + ar 4 g, (2) where O gd and o | - are the constant coefficients of the approximation of the polynomial, Xj. - output signal flow rate ера er 1 of separated gas, pressure gaea P according to the formula, - constant coefficients of approximation of the polynomial, Xp - output signal of the pressure sensor 3, flow rate of the circulating water according to the formula V ab b / ab, 4 4 where oij, cijj - constant coefficients of the polynomial, X {, - output signal of the flow meter diverted WATER1. From the output signals from the moisture meter 4 in the first multiplication unit 16, the second term of the EI term of formula (1) is calculated. The value of the coefficient al is received from the first sensor of the constants 22. In the first block 32 of the addition, the result of the calculation of the block 16 854 is added to the value of the post coefficient 3 c, the post {1, the reading; In the same way, according to the input signals from the pressure sensor 3 and the flow rate of measure 2 of the discharged water with the help of blocks and constant adjusters 18, 28, 35, 29 and 19, 30, 36, 31, respectively, according to the formula (3) and (4) ) the actual values of gas pressure and discharge water flow are determined accordingly. The signal from the gas flow meter 1 enters the block 15. Using the blocks and constant gauges 15, 17, 25, 33, 26, the actual value of the gas flow is determined by the formula (2). Based on the actual value of moisture content obtained from the oil, the rate of change of the input signal is determined using the first differentiation unit 38. This value is averaged by the first averaging unit 40 in the time interval set by the third constant setting unit 24. Blocks 39 and 42, respectively, of differentiation and averaging, determine in a similar way the speed VQ and its average value Qfi in the averaging interval specified from the setpoint constant 24. According to the inlet pressure P, the first functional converter determines the current value of the gas factor. The first division unit 43, the third addition unit 34, and the second divider 44 determine the current value of time from the bed i by the formula (1). The VK signal to the block 44 comes from setpoint constant 27. The current value Gljj to the addition unit 34 comes from the unit 36. In the second averaging unit 41, the averaging time is averaged. The averaging interval comes from the third setpoint 24 constant. The signal C enters the blocks 20 and 21 of block 41. In the sixth block 37 of the addition, the flow is calculated, with no more than OCH. The values of Qg / p / p and Qjj are received with block 43 and 21, respectively. The second 46, third 47, and fourth 48 functional transducers compute Len Ya 3, respectively. The value to the third functional converter comes from block 37. In the indicated Functional converters in a certain

sequences are performed elementary arithmetic operations. The blocks for performing these operations correspond to the conventional elementary

blocks.

The regulator 9, in accordance with the signal proportional to the total consumption of the de-emulsifier, eliminates the control action, corrected for a given value of the quality of the withdrawn oil, depending on which device 8 increases or decreases the amount of the demulsifier being dosed.

The invention makes it possible to reduce the consumption of energy resources by up to 15% and to improve the quality of the preparation. of oil.

Claims (1)

METHOD FOR AUTOMATIC CONTROL OF THE GAS-SATURATED OIL DEEMULATION PROCESS by adjusting the flow rate of the demulsifier into the apparatus depending on the flow rate of the water discharged from the apparatus and the moisture content of the flowing oil, in which, in order to improve the quality of the oil preparation, when adjusting the flow rate of the emulsified oil, and gas flow rate separated in front of the apparatus. I 133 28 5