SU1477735A1 - Method of controlling a group of settlers operating in parallel - Google Patents

Abstract

The invention relates to the primary preparation of oil and may find application in the creation of automated process control systems. The aim of the invention is to improve the quality of oil preparation under the conditions of variable quantity and quality of the initial emulsion and unequal separation capacity of the apparatus. The apparatus for carrying out the method comprises a crude oil supply pipeline 1, a heater 2, sumps 3 connected in parallel, drainage water discharge pipelines 4, prepared oil pipeline 5. The flow meters 6 are connected to the computing device 7, which determines the total capacity of the unit and corrects the load of each settler, issuing signals "Task" by the controller 8 connected to the actuators 9. The sensors 10 of the oil in the settlers, moisture meters 11 are also connected to the computing device 7 and 12, a centrifugal separator 13. Interphase regulators 14 with use mechanisms 15 on the drainage water discharge line maintain the required level of phase separation. Computing device 7 determines the separation capacity of each sump, taking into account the viscosity of oil in the sumps, oil flow through the sump, the initial water content of the emulsion and the design features of the devices, finds the total separation capacity of the unit, calculates the optimum performance of each sump for a given load and corrects the flow oil through each unit by issuing tasks to the regulators 8. 1 Cp f-ly, 1 ill.

Description

one

The invention relates to the primary preparation of oil, in particular, to the management of dehydration processes, and may find application in the creation of automated control systems for technological processes for the preparation of oil in parallel-working septic tanks.

The purpose of the invention is to increase the quality of oil preparation.

The drawing shows a diagram of the device for implementing the method.

The device contains a crude oil supply pipeline 1, a heater 2, parallel connected apparatuses (settling tanks) 3, drainage water discharge pipelines 4, pipeline 5, prepared oil, oil flow meters b, a computing device 7 connected with its flow meters 6, and outputs through the load controllers 8 (capacity) of each apparatus 3 with actuators 9 ". In addition, the device contains temperature sensors 10, moisture meters 11 and 12 and a centrifugal separator 13, level gauges are installed in the sumps 3, TED through regulators 14 level with the actuators 15 on the drainage water line 3 of each apparatus.

The method is carried out as follows.

The viscosity of the oil in each sump is determined 3. It can be measured or determined as a function of temperature.

oil, for example, by the following dependencies

p (t)

five

(That), (T-T0)} with frf (T%) expf-A2 (T-T,)} with VKT ,;

tskht2) (T-Tg)} at Tg & 1

(one)

where T. and T 2 are critical temperatures determined by the properties of the oil.

The oil consumption is measured using flow meters 6 through each sump 3 and the initial emulsion watering with a moisture meter 11. The separation capacity of each sump is determined as a function of the specified values and design features of the apparatus. The separation capacity of the apparatus is understood as the oil dehydration factor 0 w 1 1

(il8blXI

K ... 0, exp w

U and in

Q ,,

oij + aliw ;; b (2)

where 9da - the water content of oil

five

Q;

AND;

0

ad a c

five

at the inlet and outlet of the 1st settler;

- oil consumption through the 1st settling tank;

- oil viscosity in i-th settling tank;

2- - identification parameters characterizing the design features of the 1st sedimentation tank; parameter characterizing the dispersion of the original EMULSION, cl:

d- "

W.

W

Bx

WW4J is the proportion of the fine component in the initial emulsion.

Then, the system of equations (3) is solved, provided that the total amount of water carried out from the parallel-working septic tanks is minimized at a given plant capacity, and the optimal distribution of the load between the septic tanks is determined.

JL- | f-.

4 V L, 1 .-. V 3 /

,}

P

 1 Q

one

J

Exit Q

i 1, n

The devices 7 are fed to the oil flow through the Splitting capacity can be determined taking into account the characterizing dispersions, for this purpose the signal 12 is sent to the calculator 7, which takes into account

IQ or when determining the capacity of the settling tanks, Pe oil for moisture meter 12 on the separator 13 for the production of coarse emulsion

15. The proposed method of licensing the delivery of the commodity category of quality to 1 category - by 0.5% and from oil in the second group.

- total water cut,

dehydrated oil stream; 20 to the third group by 0.7%.

25

- total load on the block

on oil;

n is the number of sump tanks operating in parallel. The signals from the flow meters 6 are fed to the computing device 7, which summarizes the instrument readings and determines the total oil capacity of the installation. The computing device 7 is also connected to the sensors 10 of the oil temperature in the sumps, the moisture meter 11, the computing device 7 performs pre-processing of information (averaging, normalization, 35 smoothing, etc.), determines the viscosity of the oil in each the sump and calculates the separation capacity of each apparatus and installation as a whole. Further, in accordance with the selected Cree-40 method, for example, minimization of the total volume of water carried with oil from the septic tanks, determines the optimal loading of each of the apparatuses. Task signals from compute 45

Claims (3)

Formula isob 1, A method of controlling an oil dehydration parallel to each other, is the productivity of each determination of the total installation capacity and the optimum water content of each corresponding to its correlator. in order to improve the quality of the oil, in addition, each of the oil and gas inlet of the installation and the capacity of each sump and the capacity of each, taking into account their design. 2. Method pop. 1, which is that, with a precision control, the proportion of finely constituted emulsion on the set is determined, / Devices 7 are fed to oil flow controllers 8 through sumps 3. The separating capacity of the settling tank 3 can be determined taking into account the parameters characterizing the dispersion of the emulsion. For this purpose, the signal from the moisture meter 12 is fed to the computing device 7, which takes these values of IQ into account when determining the separating capacity of the settling tanks. the centrifugal separator 13 produces a coarse emulsion separation, 15 The proposed method allows to increase the supply of commercial oil in the highest quality category by 1%, in the first category by 0.5% and to reduce the delivery of oil in the second group by 0.8% and in L, Invention Formula 1, A method of controlling a group of parallel-working settling tanks for dewatering oil by measuring the productivity of each of them, determining the total capacity of the installation and the optimum performance of each settling tank and its corresponding adjustment, characterized in that In order to improve the quality of oil treatment, the water content of the oil / water emulsion at the plant inlet and the oil viscosity in each sump is additionally measured, and the separation capacity of each sump is determined based on their design features. 2. Method pop. 1, characterized in that, in order to improve the control accuracy, the fraction of the fine component of the emulsion at the inlet of the plant is additionally determined,