CN103614156A - Automatic control system for viscosity reduction of thickened oil and control method thereof - Google Patents
Automatic control system for viscosity reduction of thickened oil and control method thereof Download PDFInfo
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- CN103614156A CN103614156A CN201310654167.5A CN201310654167A CN103614156A CN 103614156 A CN103614156 A CN 103614156A CN 201310654167 A CN201310654167 A CN 201310654167A CN 103614156 A CN103614156 A CN 103614156A
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Abstract
The invention discloses an automatic control system for viscosity reduction of thickened oil and a control method thereof. The automatic control system comprises a viscosity-reducing device, a condenser, a related storage tank and a programmable logic controller (PLC) automatic control system, wherein the PLC automatic control system comprises a pressure sensor, a viscosity sensor, a liquid mass flow sensor, a gas mass flow sensor, an electromagnetic valve, a shutoff valve, a metering pump, a touch screen, an analog/digital (A/D) and digital/analog (D/A) module, a PLC, a relay, a contactor and a three-phase asynchronous motor. Based on the test, the inlet pressure parameter of the viscosity-reducing device is optimized, and the upper limit value and the lower limit value of viscosity are set on the touch screen; circulating viscosity reduction of oil and automatic separation of light component gases are realized by controlling the action of the related pump and the electromagnetic valve; when the measured value of the viscosity sensor reaches the set range, the light component gases are condensed by the condenser and collected to a light component tank, and the heavy component oil is collected to a heavy component tank; the PLC adjusts the opening degree of the shutoff valve through comparison and calculation and performs equivalent supply on raw materials.
Description
Affiliated technical field
The present invention relates to a kind of automatic control system and control method thereof, be mainly used in the viscosity reduction of petroleum chemical industry medium-high viscosity viscous crude.
Background technology
China's oil shortage of resources, oil and natural gas workable reserve is far below world average level per capita.Aspect crude oil consumption, China has replaced Japan, becomes the second-biggest-in-the-world oil consumption state that is only second to the U.S..On the one hand, along with the overexploitation of oil, oil is declining year by year; On the other hand, the abundant viscous crude of storage capacity again can not Efficient Development, so utilize viscous crude efficient, energy-conservationly, is the key subjects of pendulum in face of China's oil processing industry.
China's reducing thick oil viscosity complete processing is perfect not enough at present, and the one, process structure is complicated, and the equipment consumptive materials such as separation column consume energy again, and oil refining cost is high; The 2nd, can only be simple to reducing thick oil viscosity, but cannot accurately control the viscosity of oil production after viscosity reduction, can not meet the diversity demand of product viscosity; The 3rd, operating process automatization, intelligent degree are low, and human input amount is large.
Summary of the invention
The present invention is directed to the problems referred to above, a kind of automatic control system for reducing thick oil viscosity and control method thereof are provided.Process structure economy of the present invention is simple, and PLC automatic control system is reliable and stable, can automatically complete the equivalent supply of viscosity reduction, collection and the raw material of viscous crude according to different viscosity requirements, realizes the automatization viscosity reduction processing to required viscosity oil production.
The present invention has adopted following technical scheme:
A kind of automatic control system for reducing thick oil viscosity, it comprises viscosity-falling unit, condenser, crude oil storage tank, tundish a, tundish b, heavy constituent tank, light constituent tank, also comprise a PLC automatic control system, it comprises pressure transmitter, viscosity sensor, liquid mass flow sensor, gas mass flow quantity sensor, magnetic valve, shut off valve, volume pump, touch-screen, A/D and D/A module, PLC controller, rly., contactor, threephase asynchronous machine, its annexation is: be arranged on the crude oil storage tank at opening for feed place successively through volume pump 1, magnetic valve 5, shut off valve 11, liquid mass flow sensor 13 connects the upper end of tundish a, tundish a bottom is successively through magnetic valve 6, volume pump 2, magnetic valve 7, shut off valve 12, pressure transmitter 14 connects the ingress of viscosity-falling unit, viscosity-falling unit outlet connects tundish b, tundish b takes back tundish a through magnetic valve 8 and volume pump 3 again, the top of tundish b is connected condenser through magnetic valve 9 with liquid mass flow sensor 16, condenser is connected with light constituent tank again, the lower end of tundish b is successively through magnetic valve 10, volume pump 4 and liquid mass flow sensor 17 are connected to heavy constituent tank, it is inner that viscosity sensor 15 is located at tundish b, each sensor signal output part connect A/D module, the signal end of two shut off valves is connected in D/A module, the signal end of magnetic valve is connected on the contact of corresponding rly., the contact of each contactor is connected with motor accordingly, the work of driving pump,
Touch-screen is connected with PLC controller with RS232 standard by communication cable, mainly being provided with viscosity demonstration, pressure demonstration, mass rate demonstration and viscosity sets, PLC used is FX-2N series of PLC, and its signal output part is connected with the coil of each rly. and contactor.
A control method for reducing thick oil viscosity automatic control system, comprises step:
(a) at touch-screen, set the inlet pressure of viscosity-falling unit, pressure transmitter is measured ingress pressure actual value and is passed to PLC controller, in PLC inside, carry out after PID computing, sending controling instruction regulates the aperture of shut off valve, makes pressure actual value approach set(ting)value;
(b), according to the range of viscosities of desired product, higher limit and the lower value of viscosity is set at touch screen interface;
(c) by touch-screen, in succession open associated pump and valve, realize the iterative cycles viscosity reduction of fluid, viscosity sensor monitoring practical viscosity value also passes to PLC controller, whether PLC controller compares practical viscosity value at viscosity setting range, carry out following operation: if not in setting range, continue to carry out (c) process; As viscosity number reaches setting range, carry out (d) process;
(d) PLC sending controling instruction, opens magnetic valve and the pump of controlling light-component gas and the collection of heavy constituent fluid, opens magnetic valve and the pump of controlling raw material supply simultaneously; The mass flow sensor of three positions feeds back to PLC controller actual mass flux values, PLC compares the mass rate of crude oil and mass rate sum heavy, light constituent, in PLC inside after PID computing, send steering order and regulate shut off valve aperture, make increment approach collecting amount; Meanwhile, PLC controller continues practical viscosity value and setting range comparison, carries out operation as follows: as still, at setting range, continue to carry out (d) process, as be greater than setting range, carry out (e) process;
(e) PLC sending controling instruction is closed pump and the magnetic valve of (d) process, and collection and supply process stop simultaneously, again get back to (c) process.
Reducing thick oil viscosity automatic control system disclosed by the invention and control method thereof, have following beneficial effect: process structure economy is simple, reduced the input of expensive device and the consumption of the energy; Can meet different viscosity demands, realize the automatization viscosity reduction processing to required oil production; Controlling System is reliable and stable, possesses intelligent control, unattended feature.
Accompanying drawing explanation
The process flow sheet of reducing thick oil viscosity system
Embodiment
Below in conjunction with the process flow sheet of reducing thick oil viscosity system, the present invention is further illustrated.
(1) first carry out pre-treatment, by touch-screen, open pump 1 and magnetic valve 5, shut off valve 11 is in certain aperture, allow viscous crude flow in tundish a, arrive after certain altitude, close pump 1 and magnetic valve 5, open pump 2 and magnetic valve 6,7 simultaneously, shut off valve 12 is in certain aperture, and fluid flows into tundish b through viscosity-falling unit;
(2) by touch-screen, set viscosity-falling unit inlet pressure optimum value, pressure transmitter 14 is monitored the pressure actual value of viscosity-falling unit ingress constantly, and be that digital transfer is to PLC controller by A/D module converts, PLC is by relatively actual value and set(ting)value obtain deviate, in PLC inside after PID computing, be passed to D/A module and obtain analog quantity, PLC controller is controlled the aperture of shut off valve 12 by this analog quantity, make actual value approach set(ting)value;
(3), according to the range of viscosities of desired product, at touch screen interface, set higher limit and the lower value of viscosity;
(4) by touch-screen shut electromagnetic valve 6,7 and pump 2, open afterwards magnetic valve 8 and pump 3, the fluid in tundish b is returned to tundish a, afterwards shut electromagnetic valve 8 and pump 3; Reopen pump 2 and magnetic valve 6,7, open subsequently magnetic valve 8 and pump 3, realize fluid from tundish a to tundish b, then process to the circulation viscosity reduction of tundish a, light-component gas is separated to the upper end of intervalve tank b automatically.Viscosity sensor 15 constantly records the viscosity of fluid in tundish b, and the data that collect are passed to PLC controller through A/D module, and PLC whether in setting range, controls relevant pump and valve event by detected value relatively;
(5) when viscosity reaches after setting range, PLC sending controling instruction is opened magnetic valve 9, 10 and pump 4, light constituent is collected into light constituent tank after condenser condenses, heavy constituent is collected into heavy constituent tank, open magnetic valve 5 and pump 1 simultaneously, tundish a is carried out to the supply of raw material: gas mass flow quantity sensor 16 and liquid mass flow sensor 17 detect heavily, the actual mass flow of light constituent, and measured value is passed to PLC controller by A/D module, through additive operation, obtain both sums, liquid mass flow sensor 13 record the actual mass flow of raw material and by measured value by A/D module to transmitting PLC controller, PLC is this value and above-mentioned and obtain afterwards deviate relatively, in PLC inside after PID computing, be passed to D/A module and obtain analog quantity, PLC controller is controlled the aperture of shut off valve 11 by this analog quantity, complete the equivalent supply of raw material,
(6) detected value when viscosity sensor is greater than setting range again, and PLC controller sending controling instruction is closed pump and the magnetic valve in (5), collects with supply process and stops, and system is in cyclic process state, the execution said process after this going round and beginning again.
Claims (2)
1. the automatic control system for reducing thick oil viscosity, it is characterized in that: it comprises viscosity-falling unit, condenser, crude oil storage tank, tundish a, tundish b, heavy constituent tank, light constituent tank, also comprise a PLC automatic control system, it comprises pressure transmitter, viscosity sensor, liquid mass flow sensor, gas mass flow quantity sensor, magnetic valve, shut off valve, volume pump, touch-screen, A/D and D/A module, PLC controller, rly., contactor, threephase asynchronous machine, its annexation is: be arranged on the crude oil storage tank at opening for feed place successively through volume pump 1, magnetic valve 5, shut off valve 11, liquid mass flow sensor 13 connects the upper end of tundish a, tundish a bottom is successively through magnetic valve 6, volume pump 2, magnetic valve 7, shut off valve 12, pressure transmitter 14 connects the ingress of viscosity-falling unit, viscosity-falling unit outlet connects tundish b, tundish b takes back tundish a through magnetic valve 8 and volume pump 3 again, the top of tundish b is connected condenser through magnetic valve 9 with liquid mass flow sensor 16, condenser is connected with light constituent tank again, the lower end of tundish b is successively through magnetic valve 10, volume pump 4 and liquid mass flow sensor 17 are connected to heavy constituent tank, it is inner that viscosity sensor 15 is located at tundish b.
2. a control method for automatic control system claimed in claim 1, is characterized in that, comprises step:
(a) at touch-screen, set the inlet pressure of viscosity-falling unit, pressure transmitter is measured ingress pressure actual value and is passed to PLC controller, in PLC inside, carry out after PID computing, sending controling instruction regulates the aperture of shut off valve, makes pressure actual value approach set(ting)value;
(b), according to the range of viscosities of desired product, higher limit and the lower value of viscosity is set at touch screen interface;
(c) by touch-screen, in succession open associated pump and valve, realize the iterative cycles viscosity reduction of fluid, viscosity sensor monitoring practical viscosity value also passes to PLC controller, whether PLC controller compares practical viscosity value at viscosity setting range, carry out following operation: if not in setting range, continue to carry out (c) process; As viscosity number reaches setting range, carry out (d) process;
(d) PLC sending controling instruction, opens magnetic valve and the pump of controlling light-component gas and the collection of heavy constituent fluid, opens magnetic valve and the pump of controlling raw material supply simultaneously; The mass flow sensor of three positions feeds back to PLC controller actual mass flux values, PLC compares the mass rate of raw material and mass rate sum heavy, light constituent, in PLC inside after PID computing, send steering order and regulate shut off valve aperture, make increment approach collecting amount; Meanwhile, PLC controller continues practical viscosity value and setting range comparison, carries out operation as follows: as still, at setting range, continue to carry out (d) process, as be greater than setting range, carry out (e) process;
(e) PLC sending controling instruction is closed pump and the magnetic valve of (d) process, and collection and supply process stop simultaneously, again get back to (c) process.
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| CN201310654167.5A CN103614156A (en) | 2013-12-05 | 2013-12-05 | Automatic control system for viscosity reduction of thickened oil and control method thereof |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105396621A (en) * | 2015-12-08 | 2016-03-16 | 成都德善能科技有限公司 | Preparation equipment for heavy oil air injection oxidation viscosity reduction catalyst and intelligent control system thereof |
| CN105487475A (en) * | 2015-12-08 | 2016-04-13 | 成都德善能科技有限公司 | Intelligent preparation system and method for thickened oil air injection oxidation viscosity reduction catalyst |
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| CN1790198A (en) * | 2004-12-14 | 2006-06-21 | 横河电机株式会社 | Process control method and process control system |
| CN101649734A (en) * | 2009-09-09 | 2010-02-17 | 西南石油大学 | Method for integrally catalyzing, reforming, reducing viscosity, extracting and transporting thick oil |
| CN102277192A (en) * | 2011-07-15 | 2011-12-14 | 中国石油天然气股份有限公司 | Method for lowering viscosity of overweight heavy oil |
| CN102287174A (en) * | 2011-04-30 | 2011-12-21 | 胜利油田胜利勘察设计研究院有限公司 | Cracking viscosity reducing method and device for oil field ground collected and conveyed salt-containing thick oil |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN2424381Y (en) * | 2000-06-02 | 2001-03-21 | 桑玉元 | Full automatic, large power supersonic emusified superthick oil transporting appts. |
| CN1790198A (en) * | 2004-12-14 | 2006-06-21 | 横河电机株式会社 | Process control method and process control system |
| CN101649734A (en) * | 2009-09-09 | 2010-02-17 | 西南石油大学 | Method for integrally catalyzing, reforming, reducing viscosity, extracting and transporting thick oil |
| CN102287174A (en) * | 2011-04-30 | 2011-12-21 | 胜利油田胜利勘察设计研究院有限公司 | Cracking viscosity reducing method and device for oil field ground collected and conveyed salt-containing thick oil |
| CN102277192A (en) * | 2011-07-15 | 2011-12-14 | 中国石油天然气股份有限公司 | Method for lowering viscosity of overweight heavy oil |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105396621A (en) * | 2015-12-08 | 2016-03-16 | 成都德善能科技有限公司 | Preparation equipment for heavy oil air injection oxidation viscosity reduction catalyst and intelligent control system thereof |
| CN105487475A (en) * | 2015-12-08 | 2016-04-13 | 成都德善能科技有限公司 | Intelligent preparation system and method for thickened oil air injection oxidation viscosity reduction catalyst |
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Owner name: CHANGZHOU HAILI SHIPPING EQUIPMENT CO., LTD. Effective date: 20140915 |
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Inventor after: Liu Xuedong Inventor after: Zhu Xiaolin Inventor after: Liu Jiayang Inventor after: Liu Wenming Inventor after: Xiao Dongqing Inventor before: Liu Xuedong Inventor before: Zhu Xiaolin Inventor before: Liu Jiayang Inventor before: Liu Wenming |
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Free format text: CORRECT: INVENTOR; FROM: LIU XUEDONG ZHU XIAOLIN LIU JIAYANG LIU WENMING TO: LIU XUEDONG ZHU XIAOLIN LIU JIAYANG LIU WENMING XIAO DONGQING |
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Effective date of registration: 20140915 Address after: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Applicant after: Changzhou University Applicant after: Changzhou Haily Marine Equipment Co., Ltd. Address before: Gehu Lake Road Wujin District 213164 Jiangsu city of Changzhou province No. 1 Applicant before: Changzhou University |
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Application publication date: 20140305 |