RU2616194C1 - Advanced compounding system of variable oil grades - Google Patents

Abstract

FIELD: oil and gas industry.

SUBSTANCE: system comprises at least two pipelines intended for transportation of oil flow and one pipeline intended for a mixed flow, a mixed flow quality measurement unit, a sour crude oil flow parameter measurement unit, a sour crude oil flow rate measurer and a mixed flow rate measurer, a calculating unit to record amounts of sour crude oil and the total amount of the mixed flow, a flow regulating device. Outputs of the sour crude oil flow parameter measurement unit, the mixed flow quality measurement unit, the sour crude oil flow rate measurer and the mixed flow rate measurer are interconnected with the corresponding data inputs of the control unit, the control output is interconnected with the flow regulating device. A drainage collector is fit before the controling flow device into the high-sulfur oil (HSO) line, with installed pressure regulator, designed to maintain the pressure on the line of high-sulfur oil of not more than a predetermined value when regulating the flow of sour crude oil swap on mixing and allowing to reset the part of the oil flow into the tank when the pressure regulator is activated. In this case, the control function of maximum pressure value on the high-sulfur oil line is activated in the unit, a control signal is set when reaching the predetermined set point pressure to half-open the pressure regulator valve, wherein a portion of the flow is discharged into the tank, and when the pressure reduces the valve is covered or completely closed. Flow meter is installed on the discharge line of sour crude oil for recording the amount of discharged sour crude oil in the tank when the pressure regulator is activated. The calculating unit of the control unit additionally keeps volume record of oil discharged into the tank when the pressure regulator is activated from the set point pressure at a predetermined maximum value on the line of sour crude oil. Additionally, the operator's room receives sound and light alarm from the control unit when the pressure regulator is activated and the part of the high-sulfur oil flow is reset into the tank.

EFFECT: ensuring maintenance of the set quality level of the compounding oil.

6 cl, 2 dwg

Description

The invention relates to automation and can be used in pipeline transport when pumping oil from several pipelines to a common highway through which a mixture of oils is transported to the consumer.

A well-known automated system for controlling the quality indicators of a fluid flow obtained by mixing oil streams flowing through pipelines to a mixing tank, comprising a flow control device, a control unit, the control output of which is interconnected with the flow control device, units for measuring the parameters of the flow of sour crude oil, a meter sour oil flow rate and mixed flow meter, while outputs of high sulfur flow parameter measurement unit true oil and a sour oil flow meter, a mixed flow meter, are interconnected with the corresponding information inputs of the control unit, the mixed flow quality measurement unit is equipped with a sulfur content analyzer, the flow control device is designed to control the pressure and flow rate of sour oil and is equipped with pressure and flow controllers ( Patent RU 2158437, G05D 11/02, 06/25/1999). The specified system is selected as the closest analogue.

The known system allows you to maintain the specified quality indicators of compounded oil (sulfur content or density) by continuously monitoring the quality indicators of this flow and regulating the flow rate of the oil stream with high sulfur content, ensuring pressure control in the pipeline with sour crude oil entering the main line, with the aim of maintaining the pressure in this pipeline is higher than the pressure corresponding to the evaporation mode — the cavitation threshold, accounting for the amount of oil, my consumer at the common rail and the amount of sour crude oil.

A disadvantage of the known system is that if the sulfur content in the sulphurous oil stream (in the incoming stream for compounding) approaches or is greater than the set value S _ass , then the damper on the sour oil line will close or close completely. At the same time, pressure will increase in the pipeline on the sour crude oil stream, and the dispatcher will stop pumping sour crude. In the event of an abrupt change in the sulfur content in the sulphurous oil flow, this can lead to the triggering of a system of safety valves designed to protect pipelines from overpressure at the oil pumping station (LPS) or disconnect the LPS pumping sour oil from maximum pressure.

The objective of the invention is the creation of an improved compounding system with the following technical result: ensuring the maintenance of specified quality indicators of the compounded oil, providing pressure control and maintaining pressure within specified limits in the pipeline with sour crude oil when pumping high sour crude oil (BCH) for compounding in the flow of sulphurous oil, providing accounting for the amount of oil sent to the consumer along the general highway, and the amount of pumped high-sulfur stand oil and sour crude oil amount discharged to the reservoir.

The problem is solved in that in an improved compounding system for multi-grade oils containing at least two oil pipelines intended for transporting oil flows, and an oil pipeline intended for a mixed flow, a unit for measuring the quality indicators of a mixed stream, a unit for measuring the parameter of the flow of sour crude oil, a flow meter sour oil flow and mixed flow meter, a computing device for accounting for the amount of sour oil and total the quantity of mixed flow, a flow control device, while the outputs of the sour oil flow parameter measuring unit, the mixed flow quality measuring unit, the sour oil flow meter and the mixed flow meter are interconnected with the corresponding information inputs of the control unit, the control output of which is interconnected with the control device flow, according to the invention to the line of sour crude oil (BCH), feeding the flow to the receiving line of the booster pump d, in front of the flow control device, a manifold with a pressure regulator is installed, designed to maintain a pressure on the sour oil line of no more than a specified value when regulating the flow rate of pumping sour oil for mixing and allowing to dump part of the oil flow into the tank when the pressure regulator is triggered.

At the same time, a control function for the maximum pressure on the sour oil line has been introduced in the control unit (BU), when the set pressure reaches the set pressure, a control signal is sent to open the pressure regulator flap, while part of the flow is dumped into the tank, and when the pressure decreases, the shutter is closed or completely closes. The set value of the maximum pressure on the sour oil line for setting the pressure regulator is selected less than the setting pressure of the safety valves to protect against overpressure of the process pipelines and tank farm. To account for the amount of sour oil discharged into the tank when the pressure regulator is triggered, a flow meter is installed on the sour oil discharge line.

The computing device of the control unit additionally keeps track of the volume of oil discharged into the tank when the pressure regulator is triggered by the set pressure at the specified maximum value on the sour oil line. Additionally, the control room receives sound and light alarms from the control unit when the pressure regulator is activated and part of the sour oil stream is dumped into the tank.

The technical result is achieved by laying (constructing) a collector for the possibility of directing “surplus” BCH to reservoirs while regulating the flow rate of BCH pumping into the sulfur dioxide stream at the reception of a booster pump, installing a pressure regulator and flow meter on this collector, introducing a compounding into the automated control system oils of the sour oil flow parameter measuring unit, sour oil flow meter and the oil flow meter measuring the total th line, maintaining pressure on the BCH block lines within a predetermined range, measuring the flow rate of oil discharged into the tank. The system is designed to control and regulate the compounding process - rational mixing of oil flows in order to provide the necessary quality characteristics of a mixed oil flow.

In FIG. 1 is a schematic flow diagram of an improved compounding system, and FIG. 2 presents a functional diagram of the automation for this proposal.

The system contains (Fig. 1 and Fig. 2): 1, 2, 3, oil pipelines for sour, sulphurous, sour oil discharge lines, respectively; 4 - tank for mixing, which is used as a receiving manifold of a booster pump; 5c is a block measuring the parameters of the flow of sour oil (pressure); 6c, 6cm, 6bdsbr - flow meters, respectively, on the line of sour oil, mixed flow and on the line of discharge of sour oil into the tank; 7cm - a density meter on a mixed stream, 8cm - a sulfur content analyzer on a mixed stream; 9 - control unit (BU), including VU-14, VU-16 calculators and controller K20; 10c - flow regulator on the sour oil pumping line; 11 - pressure regulator on the line of discharge (receipt) of sour oil in the tank 12; 13 - reservoir for sulphurous oil; 14 - booster pump, 15 - oil pipeline for mixed oil.

Changes are made to the NPS flow chart, namely: a pipeline 3 is laid (under construction) from the sour crude oil (BCH) line, a pressure regulator 11 and a flow meter 6vsbr are installed on this line, the line is connected to the reservoir 12 allocated for storage of BCH. If there is a line at the NPS for receiving BCH to the tank farm, then a pressure regulator 11 and a flow meter 6всбр are installed on this line. The system automatically monitors (controls) the pressure on the BCH line. The control function on the BCH line is implemented in the invention RU 2158437, G05D 11/02, 06/25/1999 from the point of view of ensuring cavitation-free operation of the flow meters of the oil metering unit. The system automatically maintains pressure P on the metering unit

where P _min - the minimum pressure value at the metering unit, at which and above which the cavitation-free mode of operation of turbine flow converters will be ensured.

According to this technical solution, an additional function is introduced to control the maximum allowed pressure on the BCH pumping line. To do this, in the K20 controller in the control unit in the memory cell, the maximum permitted pressure on the VSN line is installed Рmax, the controller receives information about the pressure value on the VSN line from the VSN 5v parameter measurement unit. If the pressure on the BCH line reaches the maximum permissible value of Pmax, the controller gives a control signal to open the damper of the pressure regulator 11 and part of the BCH flow is dumped into the tank allocated for this purpose. To account for the amount of oil discharged into the tank 12, a 6bssbr meter is installed. The setting value of the maximum permitted pressure in the BCH collector is taken to be less than the limit for the setting of the safety valves of the tank system and process pipelines against overpressure. When the pressure in the manifold BCH decreases, the shutter of the pressure regulator 11 closes or closes completely and the discharge of BCH into the tank 12 stops. Sour crude oil that enters the reservoir is drawn into the pumping system as the tank is filled with metered mixing with sulfur oil by known methods or is drawn into the pumping station for piping the BCH to the next pump.

The system operates as follows. Let it be required to conduct compounding by sulfur parameter. An 8cm sulfur analyzer monitors the continuous sulfur content of the mixed stream. Information on the current value of the sulfur content is transmitted to the control unit 9 of the compounding system, which includes calculators VU-14, VU-16 and controller K20. In the memory cell of the control unit of the K-20 controller, a predetermined value of sulfur content is set, beyond which it is impossible to prevent an increase in the value of sulfur content. The received information on the current value of sulfur content in controller K 20 from an analyzer of sulfur content 8 cm is compared with a predetermined value S _ass set in the memory cell of the controller. If the current value is less than the specified S _cm <S _ass , then the control system gives a signal to open the damper - 10V flow regulator (pressure) until then, until the equality of the current value and the set value of the sulfur content S _cm = S _ass , . If the current value of the sulfur content is greater than the set S _cm > S _ass , the control system gives a signal to cover the shutter 10v of the flow regulator until the equality of the current and set values of the sulfur content S = S _ass . Thus, the system will maintain a predetermined value of sulfur content in the mixed stream. If, while covering the shutter of the 10V flow control valve to maintain a given sulfur content, the pressure on the sour oil supply line (BCH) will increase and reach the pressure of the pressure regulator 11 to adjust to the maximum pressure, the shutter of the pressure regulator will open, and part of the BCH flow will enter reservoir 12. Metering the amount of discharged oil in RVS 12 according to the flow meter 6vsbr. Information on the value of the discharge rate of oil discharged, on the consumption of BCH supplied for compounding, as well as on the flow rate on the mixed flow is supplied to the calculator VU-16 of the control unit, where the volume of oil delivered to reservoir 12, the volume of compound oil (pumped BCH) and the total volume are recorded pumping the oil mixture through the pipeline 15. When the pressure on the BCH intake line decreases and the value is less than the pressure of the pressure regulator 11, the valve shutter closes and the BCH discharge to the tank 12 stops.

It is known that when mixing liquids (mutually insoluble), quality indicators (the content of quality parameters characterizing the physicochemical properties) obey the law of additivity.

where G _cm , G ₂ , G ₁ - the mass flow rate of mixed oil, sour and sulphurous oil, respectively;

S _cm , S ₂ , S ₁ - mass content of sulfur in mixed, sour and sulfur oil, respectively;

From relations (1), (2) we obtain

Thus, it can be seen from relation (3) that the regulation of the sulfur content in the mixed stream S _cm can be carried out by changing the flow ratio.

, т.е. G₂=0.In those cases when the sulfur content in the incoming sulphurous oil stream increases and approaches the set S _ass value (lack of quality margin), the automation system closes the dampers on the sour oil stream and the compounding stops. From relation (3) it follows that when S _cm = S ₁ = S _{cm ass} ,

, i.e. G ₂ = 0.

In such cases, closing the shutter on the BCH flow will increase the pressure in the pipeline through which the BCH flows. To avoid tripping safety valves CAPQ protection process piping and equipment tank farm of high pressure, when the opening P on the setting of the pressure regulator 11 _hordes control unit gives a pressure signal to a valve controller 11 ajar pressure and flow the BCH discharged into tanks for BCH. In this case, the pressure on the BCH line will decrease and the SPPK will not trigger. Subsequently, with a decrease in the sulfur content in sulphurous oil S ₁ <S _{cm, the} BCH compounding will resume, i.e. the flap of the flow regulator 10c will open and as the pressure on the BCH line decreases, the flap of the pressure regulator 11 will be closed until it is completely closed. The case considered can be short-term, i.e. when an abrupt change (spikes) in the sulfur content in the sulphurous oil stream will be observed.

. Рассмотрим случай, когда соотношение расходов увеличилось за счет увеличения расхода G₂ потока ВСН (или за счет уменьшения производительности перекачки G_см) и это привело к неравенству S_см>S_зад, тогда блок управления дает сигнал на прикрытие заслонки регулятора 10в расхода и установится новое соотношение расходов. При этом давление на линии ВСН повысится: его значение может быть ниже предела настройки P_орд регулятора 11 давления или выше. В том случае, когда на линии ВСН значение давление ниже значения настройки регулятора 11 давления на открытие, система автоматики не дает никаких управляющих воздействий. В том случае, когда давление на линии ВСН больше, чем предел настройки регулятора давления P_всн>P_орд, то заслонка регулятора 11 давления приоткроется и часть потока ВСН будет сбрасываться в резервуар для ВСН и давление на линии ВСН будет поддерживаться не более значения P_орд. Для уменьшения соотношения расходов

можно изменить режим перекачки по магистральному трубопроводу G_см в сторону увеличения, тогда расход G₂ останется на прежнем уровне и не произойдет увеличение давления на линии ВСН и не произойдет сброса части потока ВСН в резервуары.From formula (3) it can be seen that the sulfur content S _cm will change if the cost ratio also changes

. Consider the case where the expense ratio increased due to an increase in the flow rate G ₂ of the BCH flow (or due to a decrease in the pumping capacity G _cm ) and this led to the inequality S _cm > S _ass , then the control unit gives a signal to cover the shutter of the flow regulator 10v and a new cost ratio. In this case, the pressure on the BCH line will increase: its value may be lower than the setting limit P _{hordes of} pressure regulator 11 or higher. In the case when the pressure on the BCH line is lower than the setting value of the pressure regulator 11 for opening, the automation system does not give any control actions. In the event that the pressure on the BCH line is greater than the limit of the pressure regulator P _vs > P _hordes , the damper of the pressure regulator 11 will _{open slightly} and part of the BCH flow will be discharged into the tank for BCH and the pressure on the BCH line will be maintained no more than P _ord . To reduce the cost ratio

you can change the mode of pumping through the main pipeline G _cm upwards, then the flow rate G ₂ will remain at the same level and there will be no increase in pressure on the BCH line and there will be no discharge of part of the BCH flow into the tanks.

When adjusting the pressure on the BCH intake line and maintaining its value equal to the setting value P _{hordes, the} damper of the pressure regulator 11 can be in an intermediate position, i.e. ajar. This will be possible when the production rate of BCH through the BCH line will be greater than that required for compounding when pumping sulfur dioxide into the stream from condition (3), when the sulfur content in the mixed stream is equal to the set value S _cm = S _ass . The required BCH performance for compounding is obtained from (3):

In the event that the BCH _{enters the LPS} through pipeline 1 with a capacity of G _vs more than G ₂ is required in relation (4), the “surplus” in the amount of (G _vs- G ₂ ) will be discharged through the BCH line to tank 12.

. В процессе регулирования содержания серы на смешанном потоке и достижения заданного значения S_см=S_зад это соотношение расходов запоминается в ячейке памяти контроллера К20 (на схеме не показана). Это текущее соотношение расходов может использоваться на следующих этапах регулирования для сокращения времени регулирования заслонкой регулятора 10в расхода в целях достижения значения содержания серы S_см=S_зад. Например, при возобновлении процесса компаундирования после его прекращения в связи с выполнением плана компаундирования или после плановых остановок перекачки и т.д. В связи с изменением производительности перекачки по трубопроводам 1, 2, 15 или изменением содержания серы во входящих потоках на компаундирование соотношение расходов будет меняться, при котором поддерживается на смешанном потоке содержание серы S_зад, при этом запоминается это новое соотношение расходов в ячейке памяти контроллера, т.е. обновляется информация по значению соотношения расходов в ячейке памяти контроллера при котором выполняется условие S_см=S_зад.The VU-14 calculator determines the ratio of the consumption of sour crude pumped for compounding and the consumption of mixed oil

. In the process of regulating the sulfur content in the mixed stream and reaching the set value S _cm = S _ass, this ratio of expenses is stored in the memory cell of the K20 controller (not shown in the diagram). This current flow rate ratio can be used in the following control steps to reduce the time required to control the flow control valve 10v in order to achieve the sulfur content S _cm = S _ass . For example, when resuming the compounding process after its termination in connection with the implementation of the compounding plan or after planned pumping stops, etc. In connection with a change in the productivity of pumping through pipelines 1, 2, 15 or a change in the sulfur content in the incoming streams for compounding, the expense ratio will change at which the sulfur content S _{ass is} maintained on the mixed stream, and this new ratio of expenses in the memory of the controller is stored, those. information is updated on the value of the ratio of costs in the memory cell of the controller under which the condition S _cm = S _ass .

If it is required to conduct compounding in terms of density, then the system works in the same way as when compounding in terms of sulfur content. Relation (1) can be written in the form:

where ρ _cm , ρ ₂ , ρ ₁ - the density of mixed, sour and sulfur oil, respectively.

From relations (5) and (2) we obtain

It is also seen from relation (6) that the regulation of the density value on the mixed flow ρ _cm can be carried out by changing the flow ratio.

In those cases when the density in the input stream at the oil pumping station increases and approaches the preset value ρ _ass , the automation system closes the shutters on the oil stream with a higher density and compounding stops.

In such cases, closing the damper in a stream with a higher density will increase the pressure in the pipeline through which oil with a higher density flows. To avoid tripping safety valves CAPQ protection process piping and equipment tank farm of high pressure, on reaching the opening P _hordes pressure regulator 11 control unit 9 set pressure gives a signal to slightly open valve regulator 11 of pressure and flow of oil from the high density is discharged into the reservoirs 12 high density oil. When part of the flow is discharged through the pressure regulator 11 to the reservoir 12, the pressure on the oil receiving line with a higher density will decrease and the SPPK will not operate. Subsequently, with a decrease in the density of sulphurous oil ρ ₁ <ρ _{cm, the back} BCH compounding will resume, i.e. the flap of the flow regulator 10c will open and as the pressure on the BCH line decreases, the flap of the pressure regulator 11 will be closed until it is completely closed. The case considered can be short-term, i.e. when there will be an abrupt change (spikes) in the density in the sulphurous oil stream.

The quantity of discharged oil is kept in RVS 12 by the 6всбр flowmeter. Information on the value of the flow rate of the discharged oil, on the flow rate of the oil supplied for compounding, as well as on the flow rate on the mixed flow, is supplied to the VU-16 computer, where the volume of incoming oil into the tank 12, the volume of the compounded oil (pumped more dense oil) and the total volume are recorded pumping oil mixture through pipeline 15.

. Рассмотрим случай, когда соотношение расходов увеличилось за счет увеличения расхода G₂ потока ВСН (или за счет уменьшения производительности перекачки G_см), это привело к неравенству ρ_см>ρ_зад, тогда блок управления дает сигнал на прикрытие заслонки 10в и установится новое соотношение расходов. При этом давление Р_бп на линии с большей плотностью повысится: его значение может быть ниже предела настройки Р_орд регулятора 11 давления или выше. В том случае, когда на линии с большей плотностью значение давления ниже значения настройки регулятора 11 давления на открытие, система автоматики не дает никаких управляющих воздействий. В том случае, когда давление на линии с большей плотностью больше, чем предел настройки регулятора давления Р_бп>Р_орд, то заслонка регулятора 11 давления приоткроется и часть потока ВСН будет сбрасываться в резервуар для приема нефти с более плотной нефти и давление на линии более плотной нефти будет поддерживаться не более значения Р_орд. Для уменьшения соотношения расходов

можно изменить режим перекачки по магистральному трубопроводу G_см в сторону увеличения, тогда расход G₂ останется на прежнем уровне и не произойдет увеличение давления на линии более плотной нефти и не произойдет сброса части потока ВСН в резервуары.From formula (6) it is clear that the density ρ _cm will change if the cost ratio also changes

. Consider the case where the expense ratio increased due to an increase in the flow rate G ₂ of the BCH stream (or due to a decrease in the pumping capacity G _cm ), this led to the inequality ρ _cm > ρ _ass , then the control unit gives a signal to cover the shutter 10c and a new expense ratio is established . In this case, the pressure P _bp on the line with a higher density will increase: its value may be lower than the setting limit P _{order of the} pressure regulator 11 or higher. In the case when, on a line with a higher density, the pressure value is lower than the setting value of the pressure regulator 11 for opening, the automation system does not give any control actions. In the event that the pressure on the line with a higher density is greater than the limit of the pressure regulator P _bn > P _orders , the damper of the pressure regulator 11 will open slightly and part of the BCH flow will be discharged into the reservoir for receiving oil with a denser oil and the pressure on the line will be more dense oil will be supported no more than the value of R _ord . To reduce the cost ratio

you can change the mode of pumping through the main pipeline G _cm upwards, then the flow rate G ₂ will remain at the same level and there will be no increase in pressure on the denser oil line and there will be no discharge of part of the BCH flow into the tanks.

When regulating the pressure on the oil supply line with a higher density and maintaining its value equal to the setting value P _{rd, the} damper of the pressure regulator 11 can be in an intermediate position, i.e. ajar. This will be possible when the productivity of oil supply with a higher density is greater than that required for compounding when pumping oil with a lower density into the stream from condition (6), when the density value in the mixed stream is equal to the specified value, i.e. ρ _cm = ρ _back

The required flow rate with a higher density for compounding will be obtained from (6):

In the event that higher density oil with a capacity of _{Gbp is} more than G _{2 is} supplied to the NPS through pipeline 1 by the ratio (7), the "surplus" in the amount of ( _Gbp -G ₂ ) will be discharged along the line of the arrival of denser oil to the tank 12.

In the process of adjusting the density value on the mixed flow and reaching the set value ρ _cm = ρ _ass , this ratio of costs is stored in the memory cell of the K20 controller (not shown in the diagram). This current flow ratio can be used in the following control steps to reduce the time for regulating the flow control valve 10c by the shutter in order to achieve the density value on the mixed flow of the set value ρ _cm = ρ _ass . For example, when resuming the compounding process after its termination in connection with the implementation of the compounding plan or after planned pumping stops, etc. In connection with a change in the productivity of pumping through pipelines 1, 2, 15 or a change in the density values in the incoming flows for compounding, the flow rate ratio will change at which the density ρ _{ass is} maintained on the mixed flow, and this new ratio of costs is stored in the controller memory, those. information is updated on the value of the ratio of costs in the memory cell of the controller, under which the condition ρ _cm = ρ _ass .

The source of economic efficiency.

The volume of the tank farm is calculated on the basis of the technological design norm and is accepted for the main pump stations within (2-3) the daily pipeline productivity, and for the pump station at the border of the technological section, if acceptance operations are also carried out, it is accepted within (1.0 -1.5) daily productivity. When automating compounding by the proposed technology, a part of the BCH involved in compounding does not enter the RP, but is mixed in the pipeline at the receiving line of the booster pump, so the number of tanks for receiving BCH can be reduced.

The amount of compounded oil in the pipelines of the receiving line of the booster pumping line according to the formula (4) will be:

This number of BCH does not enter the tanks, and therefore, it is possible to reduce the number of tanks at the LPS designed to receive and store BCH by this value, taking into account the utilization of the useful capacity of the tanks. The volume reduction of the reservoir capacity will be:

where ρ _cm is the density of the oil mixture, K _and is the coefficient of the useful capacity of the tank, V _2y is the volume of reduction in the capacity of the tank farm.

For NPS conditions, when compounding is carried out in several pumping directions, the number of saved tanks at the NPS is determined by summing their volumes in each direction.

The total number of BCH receipts at the NPS will be:

, где i - порядковый номер трубопроводов ВСН, по которым поступает нефть на НПС, n - количество входящих потоков ВСН, G_2i - количество ВСН, поступающей по i-ому трубопроводу.

where i is the serial number of the BCH pipelines through which oil is supplied to the pump station, n is the number of incoming BCH streams, G _2i is the number of BCH pipelines entering the i-th pipeline.

The amount of oil used for compounding over the entire NPS will be:

, где j - номер направления компаундирования, k - количество направлений компаундирования на НПС.

where j is the number of compounding directions, k is the number of compounding directions at the NPS.

Then, the number of BCH not involved in compounding will go to the tank farm and the volume of tanks for BCH will be required:

where ρ ₂ is the density of the VSN, k _and is the coefficient of the useful capacity of the tank, R is the coefficient taking into account the type of LPS, for head LPS R is taken from 2 to 3, for LPS at the border of technological areas, when acceptance operations are carried out - from 1 to 1,5.

The volume of the tank farm for BCH, saved (reduced) when introducing compounding automation, will be:

Claims (6)

1. An advanced compounding compound oil system containing at least two oil pipelines for transporting oil streams, and an oil pipeline for mixed flow, a mixed flow quality measuring unit, a sour oil flow parameter measuring unit, a sour oil flow meter, and a sour flow meter mixed flow rate, a computing device for accounting for the amount of sour oil and the total amount of mixed flow, devices about the flow control, while the outputs of the unit for measuring the parameter of the flow of sour crude oil, the unit for measuring quality indicators of the mixed flow, the flow meter of the flow of sour crude oil and the flow meter of the mixed flow are interconnected with the corresponding information inputs of the control unit, the control output of which is interconnected with the flow control device, characterized in that to the sour oil line supplying the flow to the receiving line of the booster pump, in front of the flow control device Rezan discharge collector with the established pressure regulator for maintaining the sour crude oil at the line pressure of not more than a predetermined value for regulating the flow of sour crude oil paging for mixing and allowing to relieve part of the oil flow into the tank when the pressure regulator is activated. 2. The system according to claim 1, characterized in that a control function for monitoring the maximum pressure value on the sour oil line is introduced in the control unit; upon reaching the set pressure value of the setting, a control signal is sent to open the pressure regulator flap, while part of the flow is discharged into the tank, and when pressure drops, the shutter closes or closes completely. 3. The system according to claim 1, characterized in that the set value of the maximum pressure on the sour oil line for setting the pressure regulator is selected less than the setting pressure of the safety valves to protect against overpressure of the process pipelines and tank farm. 4. The system according to claim 1, characterized in that to account for the amount of sour oil discharged into the tank when the pressure regulator is activated, a flow meter is installed on the sour oil discharge line. 5. The system according to claim 1, characterized in that the computing device of the control unit additionally keeps track of the volume of oil discharged into the tank when the pressure regulator is activated from the set pressure at the specified maximum value on the sour oil line. 6. The system according to claim 1, characterized in that the operator’s room also receives sound and light alarms from the control unit when the pressure regulator is activated and part of the sour oil stream is dumped into the tank.

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