SU1247400A1 - Device for automatic control of petroleum treatment process - Google Patents

Description

ten

11247400

The invention relates to devices for the automatic regulation of the process of oil refining and dehydration in an electric dehydrator and can be used in the petroleum and oil refining industry.

The purpose of the invention is to improve the quality of oil preparation in the electric dehydrator.

The drawing shows a block diagram of an apparatus for automatically controlling the process of preparing oil in an electric dehydrator.

The control object is an electro-dehydrator 1 with upper 2 and lower 3 electrodes and high voltage transformers 4 and 5.

The main channel for regulating the difference in the current of the electrodes is attributed from sensors 6 and 7 of the current of the upper and lower electrodes of the unit. 8 subtracting the TRC, block 9 of the control of the presence of phase voltages, block 10 to form an equivalent. disconnected electrode and current adder 11.

The important channel for regulating the level of the water-oil phase separation consists of a sensor 12 and a water-oil phase level indicator 13. The selector 14 of maximum values by its inputs is connected to the output of the adder 11 and the signaling device 13, and the output - to the input of the controller 15.

The device works as follows.

The currents of electrodes 2 and 3, measured by sensors 6 and 7, are fed to the inputs of subtraction unit 8, the output of which is connected to the positive input of adder 11.

Phase voltages U ,, Ug of the power supply of the lower and upper electrodes nocTy-i are fed to the inputs of the block 9 of the control of the presence of phase voltages, discrete

which is currently a better signal than the other.

In a normal mode of operation, the signal of the difference between the current of the electrodes generated at the output of the adder 11 exceeds the signals from the selector 13 of the level, and at the output of the selector a signal of different currents of the electrodes is generated, which goes to the input of the regulator 15. The regulator 15 prevents a mismatch by continuous drainage of salt water. In this way, the tS of the set value of the current difference is automatically adjusted.

elektrodrodv electrode dehydrator.

Improving the quality of oil, reducing the consumption of oil or the rate of crude oil increases

20 Phase level signals reduction of the current difference signals of the electrodes. In this case, the magnitude of the output signal of the phase separation level from the detector 13 becomes greater than m.

The 25th signal of the adder 11. The output signal of the selector 14 for such a combination of the electrodehydrator mode is determined by the signal of the section level, therefore the regulator 15 performs

, - automatic adjustment of the water-oil level by dredging saline water.

In case of disconnection of one of the two electrodes, the equivalent current of the open electrode (blocks 9 and 10) is triggered, while the output signal of the adder 11 remains equal to the previous value of the signal and the sequence of signal processing does not change

In the case of a simultaneous disconnection of the supply voltage of the upper and lower electrodes, the electrode dehydration of the electrodes becomes equal

40

the output of which is connected to the input of the block .. zero, respectively, the output

l .. l. r TWi-cva tt f TttfttMft about 1 h tfi t Offt m rt

ka 10 forming the equivalent current of the disconnected electrode The output of the unit 10 is connected to the negative input of the adder 11, the output of which is connected to the first input of the selector 14 of the maximum values of the signals.

 At the same time, the water-oil phase separation signals, generated by a level 12 sensor and a signaling device 13, arrive at the second input of the selector 14, the maximum values of the signals. The output of the selector 14 is equal to the value of that of the input signals.

50

55

the signal of the adder 11 also becomes equal to zero, and the output signal of the phase indicator level of the signaling device passes unchanged through the village 14 to the input of the regulator 15, the circuit automatically switches to adjusting the phase separation of the spare channel.

 When turned on, the voltage of the electrically generated signals is similar to that described above.

The presence of the selector of the maximum values of the controlled variables both

which is currently more of a different signal.

In the normal operation mode of the electrode dehydrator, the signal of the electrode current difference formed at the output of the adder 11 exceeds the signals of the level indicator 13, and at the output of the selector the signal of the difference of the electrode currents is generated, which enters the input of the regulator 15. The controller 15 clears the signal mismatch by inadvertent drainage of salt water. In this way, S is automatically adjusted to set the value of the current difference.

elektrodrodv electrode dehydrator.

When oil quality improves, oil consumption decreases or the temperature of crude oil increases, the separation level signals and the electrodes current difference signals decrease. At the same time, the value of the output signal of the phase separation level of the signaling device 13 becomes greater than the current signal of the adder 11. The output signal of the selector 14 for such a state of electronehydrator is determined by the signal of the phase separation level, therefore the controller 15 performs

- automatic regulation of the water-oil phase separation level by draining salt water.

In the event of one of the two electrodes disconnecting, the circuit is activated; forming the equivalent current of the disconnected electrode (blocks 9 and 10), while the output signal of the adder 11 remains equal to the previous value. Signal processing and signal processing sequence remain unchanged.

In case of simultaneous disconnection of the supply voltage of the upper and lower electrodes of the dehydrator, the currents of the electrodes become equal to

 zero, respectively, the output

r TWi-cva tt f TttfttMft about 1 h tfi t Offt m rt

the signal of the adder 11 also becomes equal to zero, and the output signal of the phase separation level of the signaling device 13 passes without changing through the selector 14 to the input of the regulator 15, i.e. the circuit automatically switches to adjusting the phase separation level in the spare channel.

 When turned on, the voltage of the electrodes prrhbrdenie signals as described.

The presence of the selector of the maximum values of the regulated values obesh31247400,

It improves the quality of the preparatory electrodes and the level of the phase separation of the oil in the electrodehydrator. yes-oil and .prevention of limiting by stabilizing the difference in currents. values of controlled variables

Compiled by B. Dolotinj

Editor M Kelemesh; Techred I.Ga OshKorrektor M, Demchik

Order 4079/25 Circulation 482 Subscription

VNIIPI State Kokshteta USSR.

for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5

Production and printing company, Uzhgorod, st. Design, 4.

Claims (1)

DEVICE OF THE DAY AUTOMATICALLY WHO THE OIL PREPARATION PROCESS IS REGULATED IN THE ELECTRODEHYDRATOR, containing the current sensors of the upper and lower electrodes connected via a subtraction unit to one input of the adder, a phase voltage monitoring unit connected to the unit for generating the equivalent current of the disconnected electrode, the output of which is connected to the other input of the adder, controller, sensor and a water-oil phase separation level indicator, characterized in that, in order to improve the quality of oil preparation in the electric dehydrator, it additionally contains a maximum selector values of the first input of which is connected to the output of the adder, the second input - to the output of a level switch, and the output - to the input of the regulator. 1247400 A1 1247400 2