CN104034687A - On-line corn oleic acid value monitoring and control system - Google Patents
On-line corn oleic acid value monitoring and control system Download PDFInfo
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- CN104034687A CN104034687A CN201410223782.5A CN201410223782A CN104034687A CN 104034687 A CN104034687 A CN 104034687A CN 201410223782 A CN201410223782 A CN 201410223782A CN 104034687 A CN104034687 A CN 104034687A
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Abstract
The invention discloses an on-line corn oleic acid value monitoring and control system which comprises a to-be-processed crude oil storage tank, a mixer, separation equipment and a finished product storage tank which are connected in sequence through conveying pipelines, wherein a 1# sample extraction and analysis device and a2# sample extraction and analysis device are respectively arranged on the conveying pipelines between the to-be-processed crude oil storage tank and the mixer and between the separation equipment and the finished product storage tank; the crude oil sample acid value of corn oil is extracted and analyzed; the acid value data are subsequently transmitted to the PLC. An electronic flowmeter is arranged on the conveying pipeline between the to-be-processed crude oil storage tank and the sample extraction and analysis device, then the measured crude oil flow data are transmitted to the PLC; an auxiliary material temporary storage tank is communicated with the mixer through an electronic metering pump; the PLC is used for calculating the acid value data and the crude oil flow data, and is used for controlling the electronic metering pump to control the auxiliary addition amount. Automatic acid value control is achieved by monitoring the addition of the corn oil acid value control auxiliary material on line.
Description
Technical field
The present invention relates to acid value of lipids monitoring field, relate in particular to a kind of corn oil acid value Online Monitoring Control System, the present invention is equally applicable to the edible oil deep processing field of same process.
Background technology
Acid value of lipids claims again acid value of oil and fat, it is one of fixed etc. elementary item of corn oil, peanut oil, soybean wet goods edible oil, it is the important indicator of oil and fat refining degree and storage stability, while being also oil alkali refining depickling, calculate the foundation of alkali charge, therefore, measure rapidly and accurately acid value of lipids and there is certain realistic meaning.Traditional method is to adopt the chemical method carry out in laboratory, both wastes time and energy, and again because adopting easily contaminated environment of chemical reagent, operating personnel is required high, can not realize on-line analysis.
Traditional laboratory is detected assay method and can only be carried out intermittent operation, cannot realize not only accurately but also the problem such as online detections fast, and this system can shorten sense cycle, and has realized in course of oil processing that acid value is online to be detected and regulate and control.In raw corn oil process, the acid value of crude oil to come unstuck and deacidifying process flow process in the addition of auxiliary material play a decisive role, native system by on-line monitoring to preprocessing crude oil acid value can automatically calculate and control the addition of auxiliary material.
Summary of the invention
In order to overcome in prior art the deficiency of chemical assay acid value method in existing commercial production, the invention provides a kind of corn oil acid value Online Monitoring Control System, the interpolation by on-line monitoring corn oil acidity controlled complement realizes acid value and automatically controls.
For achieving the above object, the present invention takes following technical scheme:
A kind of corn oil acid value Online Monitoring Control System, comprise the crude oil storage tank to be processed, mixer, separation equipment and the finished product storage tank that by transmission pipeline, connect successively, the corn oil crude oil of crude oil storage tank storage to be processed is delivered to mixer through transmission pipeline, 7 pairs of corn oil crude oils of mixer carry out after auxiliary material adds chemical reaction being delivered to separation equipment, corn oil crude oil after separation equipment adds auxiliary material carries out waste liquid separation and obtains corn oil finished product, and is delivered to finished product storage tank and stores.
Crude oil storage tank to be processed is between mixer, and separation equipment is to being respectively equipped with sample extraction and analytical equipment and No. two sample extraction and analytical equipment on the transmission pipeline between finished product storage tank, sample extraction and analytical equipment and No. two sample extraction and analytical equipment carry out, after extraction and analysis, acid value data are sent to PLC controller to corn oil crude oil sample acid value.
Crude oil storage tank to be processed is also provided with electronic flow-meter to the transmission pipeline between sample extraction and analytical equipment, and electronic flow-meter is sent to PLC controller by the crude oil data on flows of measurement; Mixer is provided with the temporary tank of auxiliary material, and the temporary tank of auxiliary material is connected with mixer by electronic metering pump; PLC controller utilizes existing formula to calculate acid value data and crude oil data on flows, obtains required auxiliary material addition, controls electronic metering pump auxiliary material addition is controlled.
Further, sample extraction device and sample automatic analyzer, described sample extraction device extracts oil sample at place, transmission pipeline acid value monitoring point and is delivered to sample automatic analyzer, and described sample automatic analyzer is sent to PLC controller by acid value data after oil sample acid value is analyzed.
Sample extraction device is the plumbing installation of provided with electromagnetic valve, and this plumbing installation one end is arranged on transmission pipeline acid value monitoring point place, and the other end is connected with sample automatic analyzer, and centre is provided with solenoid valve, by this plumbing installation opened/closed of solenoid control.Plumbing installation is the colourless transparent glass pipeline of length 10cm, and its diameter is 2cm, and this pipe diameter and length setting are more conducive to grease sample extraction and extracted amount is controlled; Solenoid valve is controlled its unlatching, closure by PLC controller output electromagnetic pulse, and opens the time interval between closure, and described PLC controller is the electromagnetic pulse of the data processing frequency output control solenoid valve of automatic analyzer per sample.
Sample automatic analyzer is near infrared grease analyser, and the oil sample that near infrared grease analyser extracts sample extraction device carries out near-infrared spectrum analysis, obtains oil sample acid value data, is sent to PLC controller.
Further, No. two sample extraction and analytical equipment are provided with feedback port to the transmission pipeline between finished product storage tank, described feedback port by feedback pipeline communication to crude oil storage tank to be processed.
Further, feedback pipeline is provided with solenoid electric valve No. one, feedback port is provided with solenoid electric valve No. two to the conveyance conduit between finished product storage tank, and PLC controller is controlled the opened/closed of a solenoid electric valve and No. two solenoid electric valves according to acid value data and crude oil data on flows.
Further, PLC controller judges whether the acid value data that No. two sample extraction and analytical equipment are carried meet finished product requirement, are less than 0.5mgKOH/g, if so, open solenoid electric valve No. two, close solenoid electric valve No. one; Otherwise, close solenoid electric valve No. two, open No. one solenoid electric valve, the corn oil crude oil after the separation of separation equipment waste liquid is delivered to crude oil storage tank to be processed through feedback pipeline.
Further, the temporary tank storage of auxiliary material auxiliary material is the NaOH aqueous solution of liquid 18-20Be °.
Beneficial effect: (1) the present invention has realized the online detection of acid value and regulation and control in course of oil processing, has shortened sense cycle, and reduces manual operation factor assurance constant product quality, and reduces cost of labor.(2) the present invention adopts closed-loop control system, and corn oil crude oil is carried out to the double sampling after auxiliary material interpolation, and controls by solenoid electric valve the corn oil crude oil that output meets finished product requirement, improves control accuracy, and guarantees end product quality.
Accompanying drawing explanation
Fig. 1 is a kind of corn oil acid value Online Monitoring Control System structural representation provided by the invention.
Fig. 2 is sample extraction and the analytical equipment structural representation in Fig. 1.
Fig. 3 is a kind of corn oil acid value Online Monitoring Control System workflow diagram provided by the invention.
Embodiment
Below in conjunction with accompanying drawing, the present invention is further described.
As shown in Figure 1, a kind of corn oil acid value Online Monitoring Control System provided by the invention, comprise crude oil storage tank 1 to be processed, mixer 7, separation equipment 6 and finished product storage tank 5, the corn oil crude oil of crude oil storage tank 1 storage to be processed is delivered to mixer 7 through transmission pipeline, at mixer 7, carry out after auxiliary material adds chemical reaction being delivered to separation equipment 6, separation equipment 6 carries out corn oil finished product being delivered to finished product storage tank 5 after waste liquid separation and stores.
The present invention arrives between mixer 7 at crude oil storage tank 1 to be processed, and separation equipment 6 arranges two monitoring points to the transmission pipeline between finished product storage tank 5, each monitoring point adopts a sample extraction and analytical equipment 3 to carry out oil sample extraction and acid value analysis, is respectively sample extraction and analytical equipment 3 and No. two sample extraction and analytical equipment 3.As shown in Figure 2, sample extraction and analytical equipment 3 comprise that sample extraction and analytical equipment 3 comprise sample extraction device 10 and sample automatic analyzer 11, described sample extraction device 10 extracts oil sample at place, transmission pipeline acid value monitoring point and is delivered to sample automatic analyzer 11, and 11 pairs of oil sample acid values of described sample automatic analyzer are sent to PLC controller by acid value data after analyzing.The plumbing installation that sample extraction device 10 is provided with electromagnetic valve, this plumbing installation one end is arranged on place, transmission pipeline acid value monitoring point, the other end is connected with sample automatic analyzer 11, and centre is provided with solenoid valve 12, by solenoid valve 12, controls these plumbing installation opened/closed.Plumbing installation is the colourless transparent glass pipeline of length 10cm, and its diameter is 2cm; Described solenoid valve 12 is controlled its unlatching, closure by PLC controller output electromagnetic pulse, and opens the time interval between closure, and described PLC controller is the electromagnetic pulse of the data processing frequency output control solenoid valve 12 of automatic analyzer 11 per sample.Sample automatic analyzer 11 is near infrared grease analyser, and the oil sample that described near infrared grease analyser extracts sample extraction device 10 carries out near-infrared spectrum analysis, obtains oil sample acid value data, is sent to PLC controller.
Coming unstuck in deacidifying process of grease, the change of acid value is by add auxiliary material (NaOH) in grease, separated to accessories such as specification product and impurity, soap stocks after mixing.For the ease of auxiliary material addition, calculate, the present invention is also provided with electronic flow-meter 2 at crude oil storage tank 1 to be processed to the transmission pipeline between sample extraction and analytical equipment 3, and electronic flow-meter 2 is sent to PLC controller by the crude oil data on flows of measurement equally.PLC controller utilizes existing formula and crude oil data on flows, acid value data can try to achieve the addition of auxiliary material.The temporary tank 9 of auxiliary material is arranged on mixer 7 and is carried out auxiliary material interpolation by electronic metering pump 8, and PLC controller is controlled by controlling 8 pairs of auxiliary material additions of electronic metering pump.
On the conveyance conduit of the present invention after No. two sample extraction and analytical equipment 3, be provided with feedback port in addition, described feedback port connects feedback pipeline to crude oil storage tank 1 to be processed, feedback pipeline is provided with solenoid electric valve 4 No. one, and feedback port to the conveyance conduit between finished product storage tank 5 is provided with solenoid electric valve 4 No. two.The acid value data that No. two sample extraction of PLC controller reception and analytical equipment 3 transmit, if acid value meets finished product requirement, open No. two solenoid electric valve 4, close solenoid electric valve 4 No. one; If do not meet, close solenoid electric valve 4 No. two, open No. one solenoid electric valve 4, the crude oil after separation equipment 6 separation is delivered to crude oil storage tank 1 to be processed again, repeat said process and again carry out auxiliary material interpolation, until the crude oil finished product acid value obtaining meets the requirements.
Principle of work: corn oil acid value Online Monitoring Control System adopts said apparatus, after equipment installation connection is put in place, system each several part carries out configuration by PLC configurable controller software wincc, by programming software, each system module is programmed, after debugging, this system can complete in grease processing technique, oil acid value detection and the control of the depickling workshop section of coming unstuck.
Crude oil is that the acid value of grease to be processed is generally 5-6(mgKOH/g), the acid value of the present invention's crude oil after the deacidifying process processing of coming unstuck requires to be controlled at 0.5(mgKOH/g) below, auxiliary material is the NaOH aqueous solution of liquid 18-20Be °.PLC controller receives the crude oil flow V that electronic flow-meter 2 gathers, and acid value data S1, S2 that sample extraction and analytical equipment 3 and No. two sample extraction and analytical equipment 3 detect, utilize existing formula
, wherein, V
afor crude oil acid value, V
a=S1-S2, G
0quality of crude oil, is multiplied by acquisition time according to crude oil flow V and calculates, and C is the massfraction of NaOH solution, thereby tries to achieve auxiliary material addition, and is converted to the flow control signal that auxiliary material adds electronic metering pump 8, carries out auxiliary material interpolation.Be acid value data S1, the S2 of PLC controller crude oil flow V and two detections as 3 variablees of system, system output quantity is the flow control signal that auxiliary material adds electronic metering pump.
As shown in Figure 3, native system is typical closed loop robot control system(RCS).By sample extraction and analytical equipment 3, treat processing grease and carry out primary sample, and pass through sample automatic analyzer to sample analysis, the analog data signal of sample extraction and analytical equipment 3 outputs is transferred to PLC controller by data line, by preset pid control parameter output control signal, after electronic metering pump 8 is accepted PLC output signal, regulation output adds auxiliary material flow, after 3 pairs of while No. two sample extraction and analytical equipments add auxiliary materials, crude oil carries out secondary sample, repeat flow process noted earlier, after calculating by computing machine and PLC control element, adjust the delivery rate of volume pump, realizing the acid value of processing raw corn oil controls, when No. two sample extraction and analytical equipment 3 acid values meet finished product requirement, at 0.5(mgKOH/g) below, open No. two solenoid electric valve 4, close solenoid electric valve 4 No. one, if do not meet, close solenoid electric valve 4 No. two, open No. one solenoid electric valve 4, the crude oil after separation equipment 6 separation is delivered to crude oil storage tank 1 to be processed again, adjust the delivery rate of volume pump, until the crude oil finished product acid value obtaining meets the requirements.
The above is only the preferred embodiment of the present invention; be noted that for those skilled in the art; under the premise without departing from the principles of the invention, can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (9)
1. a corn oil acid value Online Monitoring Control System, it is characterized in that: this system comprises crude oil storage tank 1 to be processed, mixer 7, separation equipment 6 and the finished product storage tank 5 connecting successively by transmission pipeline, the corn oil crude oil of described crude oil storage tank to be processed 1 storage is delivered to mixer 7 through transmission pipeline, 7 pairs of corn oil crude oils of described mixer carry out after auxiliary material adds chemical reaction being delivered to separation equipment 6, corn oil crude oil after the 6 pairs of auxiliary materials of described separation equipment add carries out waste liquid separation and obtains corn oil finished product, and is delivered to finished product storage tank 5 and stores;
Described crude oil storage tank to be processed 1 is between mixer 7, and separation equipment 6 is to being respectively equipped with sample extraction and analytical equipment 3 and No. two sample extraction and analytical equipment 3 on the transmission pipeline between finished product storage tank 5, a described sample extraction and analytical equipment 3 and No. two sample extraction and 3 pairs of corn oil crude oil sample acid values of analytical equipment carry out, after extraction and analysis, acid value data are sent to PLC controller;
Described crude oil storage tank 1 to be processed is also provided with electronic flow-meter 2 to the transmission pipeline between sample extraction and analytical equipment 3, and described electronic flow-meter 2 is sent to PLC controller by the crude oil data on flows of measurement; Described mixer 7 is provided with the temporary tank 9 of auxiliary material, and the temporary tank 9 of described auxiliary material is connected with mixer 7 by electronic metering pump 8; Described PLC controller is controlled according to acid value data and 8 pairs of auxiliary material additions of crude oil data on flows control electronic metering pump.
2. a kind of corn oil acid value Online Monitoring Control System according to claim 1, it is characterized in that: described sample extraction and analytical equipment 3 comprise sample extraction device 10 and sample automatic analyzer 11, described sample extraction device 10 extracts oil sample at place, transmission pipeline acid value monitoring point and is delivered to sample automatic analyzer 11, and 11 pairs of oil sample acid values of described sample automatic analyzer are sent to PLC controller by acid value data after analyzing.
3. a kind of corn oil acid value Online Monitoring Control System according to claim 2, it is characterized in that: described sample extraction device 10 is the plumbing installation of provided with electromagnetic valve, this plumbing installation one end is arranged on place, transmission pipeline acid value monitoring point, the other end is connected with sample automatic analyzer 11, and centre is provided with solenoid valve 12, by solenoid valve 12, control this plumbing installation opened/closed.
4. a kind of corn oil acid value Online Monitoring Control System according to claim 3, is characterized in that: described plumbing installation is the colourless transparent glass pipeline of length 10cm, and its diameter is 2cm; Described solenoid valve 12 is controlled its unlatching, closure by PLC controller output electromagnetic pulse, and opens the time interval between closure, and described PLC controller is the electromagnetic pulse of the data processing frequency output control solenoid valve 12 of automatic analyzer 11 per sample.
5. a kind of corn oil acid value Online Monitoring Control System according to claim 2, it is characterized in that: described sample automatic analyzer 11 is near infrared grease analyser, the oil sample that described near infrared grease analyser extracts sample extraction device 10 carries out near-infrared spectrum analysis, obtain oil sample acid value data, be sent to PLC controller.
6. a kind of corn oil acid value Online Monitoring Control System according to claim 1, it is characterized in that: described No. two sample extraction and analytical equipment 3 are provided with feedback port to the transmission pipeline between finished product storage tank 5, described feedback port is by feeding back pipeline communication to crude oil storage tank 1 to be processed.
7. a kind of corn oil acid value Online Monitoring Control System according to claim 6, it is characterized in that: described feedback pipeline is provided with solenoid electric valve 4 No. one, feedback port to the conveyance conduit between finished product storage tank 5 is provided with solenoid electric valve 4 No. two, and described PLC controller is controlled the opened/closed of a solenoid electric valve 4 and No. two solenoid electric valves 4 according to acid value data and crude oil data on flows.
8. a kind of corn oil acid value Online Monitoring Control System according to claim 7, it is characterized in that: described PLC controller judges whether the acid value data that No. two sample extraction and analytical equipment 3 are carried meet finished product requirement, be less than 0.5mgKOH/g, if, open No. two solenoid electric valve 4, close solenoid electric valve 4 No. one; Otherwise, close solenoid electric valve 4 No. two, open No. one solenoid electric valve 4, the corn oil crude oil after separation equipment 6 waste liquid separation is delivered to crude oil storage tank 1 to be processed through feedback pipeline.
9. a kind of corn oil acid value Online Monitoring Control System according to claim 1, is characterized in that: the temporary tank 9 storage auxiliary materials of described auxiliary material are the NaOH aqueous solution of liquid 18-20Be °.
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| CN201410223782.5A CN104034687B (en) | 2014-05-26 | 2014-05-26 | A kind of Semen Maydis oil acid value Online Monitoring Control System |
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| CN201410223782.5A CN104034687B (en) | 2014-05-26 | 2014-05-26 | A kind of Semen Maydis oil acid value Online Monitoring Control System |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117660106A (en) * | 2023-12-29 | 2024-03-08 | 山东兴泉油脂有限公司 | Preparation monitoring method and system of nutritional healthy corn oil |
| CN117928655A (en) * | 2024-03-22 | 2024-04-26 | 济宁万生环保材料有限公司 | Material reaction instant acid value data on-line monitoring system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN117660106A (en) * | 2023-12-29 | 2024-03-08 | 山东兴泉油脂有限公司 | Preparation monitoring method and system of nutritional healthy corn oil |
| CN117928655A (en) * | 2024-03-22 | 2024-04-26 | 济宁万生环保材料有限公司 | Material reaction instant acid value data on-line monitoring system |
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Inventor after: Cheng Xinhang Inventor after: Wang Dai Inventor after: Wang Xiao Inventor after: Xing Jianbin Inventor after: Sun Shuhua Inventor after: Wang Shaozhen Inventor after: Du Jun Inventor before: Wang Dai Inventor before: Wang Xiao Inventor before: Xing Jianbin Inventor before: Sun Shuhua Inventor before: Wang Shaozhen Inventor before: Du Jun |
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