CN103901827A - Methylamine nitrate production automatic control system - Google Patents
Methylamine nitrate production automatic control system Download PDFInfo
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- CN103901827A CN103901827A CN201210580569.0A CN201210580569A CN103901827A CN 103901827 A CN103901827 A CN 103901827A CN 201210580569 A CN201210580569 A CN 201210580569A CN 103901827 A CN103901827 A CN 103901827A
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- control system
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- methylamine nitrate
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
- Y02P90/02—Total factory control, e.g. smart factories, flexible manufacturing systems [FMS] or integrated manufacturing systems [IMS]
Abstract
The invention discloses a methylamine nitrate production automatic control system, for solving the problem of automatic control of a methylamine nitrate production process. The automatic control system comprises a parallel on-line system and a PID control system. The information output end of the PID control system is connected with the information input end of the parallel on-line system, and the feedback information output end of the parallel on-line system is connected with the information input end of the PID control system. The control system provided by the invention is high in automation degree, can realize an unattended methylamine nitrate process, can efficiently manufacture methylamine nitrate, and is high in safety and reliability.
Description
Technical field
The present invention relates to a kind of methylamine nitrate production automatic control system.
Background technology
Control system is the core of whole methylamine nitrate water gel [explosive production line.Existing industrial production line adopts manually and controls, and controls complexity, and security is low, and operational factor cannot show in real time.Due to the limitation of system itself, the demonstration of various parameters is difficult to realize, and as technological parameters such as flow, temperature, liquid level and flows, is unfavorable for that operator grasps equipment running status, and system lacks dirigibility, is difficult to expansion and consummating function.
Summary of the invention
In order to overcome above-mentioned the deficiencies in the prior art, the invention provides a kind of methylamine nitrate production automatic control system.The present invention adopts the automatic control system being made up of PID control system and parallel on-line system to realize the automatic control to methylamine nitrate production run, has solved the problems referred to above.
A kind of methylamine nitrate production automatic control system, comprise parallel on-line system, PID control system, PID control system information output is connected with parallel on-line system information input end, and the feedback information output terminal of parallel on-line system is connected with PID control system information input terminal;
Described parallel on-line system comprises material storaging tank, parallel average mechanism, concentrated mechanism online, material storaging tank is connected with the entrance of parallel average mechanism by pipeline, pipeline between material storaging tank and parallel average mechanism is provided with discharge pump, flow sensor, and the outlet of parallel average mechanism is connected with the online mechanism's entrance that concentrates;
Neutralization tank, fine setting tank, pipeline, valve mechanism, rabbling mechanism, flow sensor, pH value sensor, cooling system, temperature control equipment that described parallel average mechanism comprises, neutralization tank is connected with material storaging tank by pipeline, neutralization tank is provided with rabbling mechanism, temperature control system, pH value sensor, liquid level sensor, pipeline between neutralization tank, fine setting tank, material storaging tank is provided with valve mechanism, flow sensor, and fine setting tank is provided with liquid level sensor;
Described online concentrated mechanism comprises interior liquid level sensor, the density sensor arranging of valve mechanism, tensimeter, concentration tank arranging on pipeline between concentration tank, concentration tank and parallel average mechanism, with concentrated tank connected vacuum extractor and heating arrangement;
Described PID control system comprises host computer, PLC electrical control gear, display control unit, host computer is connected with PLC electrical control gear by system bus, the signal input part of the signal output part access PLC electrical control gear of parallel on-line system, the signal input part of the signal output part access host computer of PLC electrical control gear.
Preferably, the material storaging tank in described parallel on-line device comprises monomethyl amine basin, rare nitric acid basin.
Preferably, the signal output part of described parallel on-line system comprises discharge pump, liquid level sensor, temperature sensor, pH value sensor, density sensor, vacuum extractor, heating arrangement, valve mechanism, manometric signal output part.
Preferably, the host computer of described PID control system is connected by PROFIBUS bus with PLC electrical control gear.
Preferably, the display control unit of described PID control system is touch-screen display.
Preferably, described vacuum extractor is vacuum pump or ejector.
Preferably, also comprise fault diagnosis alarm module, fault diagnosis alarm module comprises secondary instrument and is arranged at the analog quantity system in PLC electrical control gear, secondary instrument is installed on the signal output part of parallel on-line system, the analog quantity system input end in secondary instrument signal output part access PLC electrical control gear.
Advantage of the present invention:
1, adopted PID control system, can realize accurately parallel neutralization in proportion, change online quantitatively neutralization in proportion according to pH value, and feed back to actuating unit dynamic adjustments pH value, adopt PID to control and make control procedure have advantages of that response is fast, overshoot is little, stable state accuracy is high.
2, adopt temperature control equipment that N-process is determined to the neutral temperature scope a safety, in N-process, by liquid level sensor, differential responses material is synchronously detected, guaranteed better distributing precision, adaptability and dirigibility; By pH value sensor, the variable condition of pH value is synchronously detected, guaranteed that neutralization is more stable, there is higher operating accuracy and efficiency, than manual shift pH value, more stable more efficiency.
3, the vacuum extractor of concentration process, adopts vacuum pump or two kinds of equipment of ejector, has guaranteed the stability of producing, and has reduced operating cost.Automatically carry out the concentrated process of methylamine nitrate, and repeatedly compare density value, until up to standard.
4, the Real-Time Monitoring of process equipment service data: by ruuning situation and the main operational factor of upper each equipment of body function monitor in pulpit.
5, the PLC electrical control gear of PID control system can detect the state of the topworks of the field apparatuss such as discharge pump, mixing plant, vacuum extractor and sensor, valve mechanism, and there is warning and the inquiry of historical data function, improve security, the reliability of system.
6, the host computer of PID control system adopts WINDOWS running environment, by PROFIBUS fieldbus and PLC electrical control gear composition dcs, improve intellectuality, hommization and the simplification of methylamine nitrate manufacture process, can realize manual control, semiautomatic control and automatically control.Realize the unmanned automatic operating from methylamine nitrate manufacture process, aspect personnel reduction and enlargement, obtained effect.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the embodiment of the present invention, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is methylamine nitrate production automatic control system structural representation in the present invention;
Description of reference numerals: 1-PID control system, 2-parallel on-line system.
Fig. 2 is the connection diagram of the signal output part of PLC electrical control gear and parallel on-line system in the present invention.
Description of reference numerals: the information output of 1-material storaging tank, the information output of the parallel average mechanism of 2-, 3-is the information output of concentrated mechanism online.
Embodiment
Control system of the present invention comprises parallel on-line system and PID control system two parts, and parallel on-line system comprises material storaging tank, parallel average mechanism, concentrated mechanism online.Material storaging tank is connected with the entrance of parallel average mechanism by pipeline, and the pipeline between material storaging tank and parallel average mechanism is provided with discharge pump, flow sensor, and the outlet of parallel average mechanism is connected with the online mechanism's entrance that concentrates.
The material storaging tank that stainless steel is made comprises monomethyl amine basin and rare nitric acid basin, 5 discharge pumps are connected with the entrance of fine setting tank with neutralization tank respectively by input channel, neutralization tank is provided with temperature control device, in basin, be separately installed with liquid level sensor, the outlet of material storaging tank is connected with one end of parallel average mechanism respectively, the neutralization tank that parallel average mechanism comprises, fine setting tank, pipeline, valve mechanism, rabbling mechanism, flow sensor, pH value sensor, cooling system, temperature control equipment, neutralization tank is connected with material storaging tank by pipeline, neutralization tank is provided with rabbling mechanism, temperature control system, pH value sensor, liquid level sensor, neutralization tank, fine setting tank, pipeline between material storaging tank is provided with valve mechanism, flow sensor, fine setting tank is provided with liquid level sensor.
Online concentrated mechanism comprises interior liquid level sensor, the density sensor arranging of valve mechanism, tensimeter, concentration tank arranging on pipeline between concentration tank, concentration tank and parallel average mechanism, with concentrated tank connected vacuum extractor and heating arrangement.
PID control system adopts the structure of constructing levels distributed computer control system take Siemens PLC as core component.PID control system comprises host computer, PLC electrical control gear, display control unit, the signal input part of the signal output part access PLC electrical control gear of parallel on-line system, the signal input part of the signal output part access host computer of PLC electrical control gear.
Upper computer software is the WINCC configuration software running under Microsoft Windows 2000 and XP environment, be connected with PLC electrical control gear by PROFIBUS bus, the signal output part of PLC electrical control gear and parallel on-line system, comprises that discharge pump, liquid level sensor, temperature sensor, pH value sensor, density sensor, vacuum extractor, heating arrangement, valve mechanism, manometric signal output part are connected.Host computer can be revised process formula and the technological parameter that methylamine nitrate is manufactured, and passes to PLC electrical control gear; PLC electrical control gear completes realization, storage, the agreement inquiry of duty in whole system, the generation of form, prints and the task such as process monitoring, receives course of work data the combined formulation that transmitter transmits methylamine nitrate worker is done to implement to control.
1, neutralization reaction control procedure
After neutralization reaction starts, whether PLC electrical control gear detects cooling water inlet temperature, outlet temperature, chilled water water flow up to standard, and monitoring in real time, start subsequently stirring motor, whether the rotating speed that detects stirring machine reaches requirement, and closes concentration tank intermediate valve, starts device for recovering tail gas vacuum pump, vacuum pump is also chain with stirring machine, and release operation separately.
PLC electrical control gear sends the discharge pump pump of the rare nitric acid basin of order startup subsequently, open the variable valve of rare nitric acid basin, the cut-off electromagnetic valve of rare nitric acid basin, calculate through flowmeter accumulation the rare nitric acid that adds set amount (adjustable), it is acid making reaction environment.Start the discharge pump of monomethyl amine basin simultaneously, open the variable valve of monomethyl amine basin, the cut-off electromagnetic valve of monomethyl amine basin, add two kinds of liquid to react simultaneously, in the process of reaction, PID control system is responsible for regulating the unlatching size of variable valve and the temperature of retort, when temperature of reaction is low, the unlatching of valve size increases, when temperature of reaction is high, the unlatching size of valve reduces, in the time that temperature exceedes the first design temperature arranging on secondary instrument, touch-screen display screen is reported to the police and is closed monomethyl amine, the control valve of rare nitric acid basin, in the time that exceeding the second design temperature arranging on secondary instrument, temperature closes monomethyl amine, the stop valve of rare nitric acid basin is also reported to the police by touch-screen display screen.In the time that temperature exceedes the 3rd design temperature arranging on secondary instrument, PID control system is given an order and is stopped discharge pump, variable valve, the stop valve of rare nitric acid, monomethyl amine basin and open fire water solenoid valve, and transfers manual operation to.
PID control system detects that according to liquid level sensor the rare nitric acid and the monomethyl amine that add reach after set amount, monomethyl amine is closed in control, the solenoid valve of rare nitric acid basin, whether reach requirement by the pH value in the input solution of pH value sensor transmissions in detection neutralization tank, reaching requirement completes by touch-screen display alert N-process, after N-process completes, PID control system is closed nitric acid, methylamine variable valve, stop valve also stops nitric acid pump and metro-methylamine pump, finish N-process, if pH value does not reach requirement in neutralization tank, PID control system crawl is opened the stop valve of monomethyl amine basin, because pH value stabilization needs certain hour, so add rear wait 15S again detect and adjust at every turn, the liquid level information of the transmission by liquid level sensor is monitored, open the upper limit of the stop valve step of monomethyl amine basin using the neutralization tank liquid level upper limit as crawl.
2, Concentrating Process Control mode
After concentration process starts, concentration tank intermediate valve is opened, concentration tank baiting valve is closed, concentration tank vent valve, close take-off valve, open take-off valve, vacuum pump starts, now methylamine nitrate solution is because negative pressure is drawn onto in concentration tank, until the liquid level of neutralization tank, time delay 30S when setting liquid level closes concentration tank intermediate valve, steam regulating valve is opened, and maintain steady temperature in pipe according to the temperature variation controlling opening of valve in tank, after 15-20min to be heated, steam off variable valve, vacuum pump, open concentration tank vent valve, close take-off valve, open take-off valve, whether the density of the input solution that PLC electrical control gear feeds back by density sensor is up to standard, if liquid is up to standard, transfer to host computer by system bus, report to the police and alert inspection by touch-screen display, density reach preset value the control of PLC electrical control gear open concentration tank baiting valve, when reaching minimum, tank liquid level to be concentrated closes concentration tank baiting valve, complete concentration process.If after detection density is not up to standard, automatically reenter concentration process, and concentrated 5 minutes, repeatedly concentrate until up to standard, if there is abnormal conditions the control of PLC electrical control gear transfer manual operation to.
Applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand core concept of the present invention; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (7)
1. a methylamine nitrate production automatic control system, it is characterized in that, comprise parallel on-line system, PID control system, PID control system information output is connected with parallel on-line system information input end, and the feedback information output terminal of parallel on-line system is connected with PID control system information input terminal;
Described parallel on-line system comprises material storaging tank, parallel average mechanism, concentrated mechanism online, material storaging tank is connected with the entrance of parallel average mechanism by pipeline, pipeline between material storaging tank and parallel average mechanism is provided with discharge pump, flow sensor, and the outlet of parallel average mechanism is connected with the online mechanism's entrance that concentrates;
Neutralization tank, fine setting tank, pipeline, valve mechanism, rabbling mechanism, flow sensor, pH value sensor, cooling system, temperature control equipment that described parallel average mechanism comprises, neutralization tank is connected with material storaging tank by pipeline, neutralization tank is provided with rabbling mechanism, temperature control system, pH value sensor, liquid level sensor, pipeline between neutralization tank, fine setting tank, material storaging tank is provided with valve mechanism, flow sensor, and fine setting tank is provided with liquid level sensor;
Described online concentrated mechanism comprises interior liquid level sensor, the density sensor arranging of valve mechanism, tensimeter, concentration tank arranging on pipeline between concentration tank and concentration tank and parallel average mechanism, with concentrated tank connected vacuum extractor and heating arrangement;
Described PID control system comprises host computer, PLC electrical control gear, display control unit, host computer is connected with PLC electrical control gear by system bus, the signal input part of the signal output part access PLC electrical control gear of parallel on-line system, the signal input part of the signal output part access host computer of PLC electrical control gear.
2. methylamine nitrate production automatic control system according to claim 1, is characterized in that, the material storaging tank in described parallel on-line device comprises monomethyl amine basin, rare nitric acid basin.
3. methylamine nitrate production automatic control system according to claim 1, it is characterized in that, the signal output part of described parallel on-line system comprises discharge pump, liquid level sensor, temperature sensor, pH value sensor, density sensor, vacuum extractor, heating arrangement, valve mechanism, manometric signal output part.
4. methylamine nitrate production automatic control system according to claim 1, is characterized in that, the host computer of described PID control system is connected by PROFIBUS bus with PLC electrical control gear.
5. methylamine nitrate production automatic control system according to claim 1, is characterized in that, the display control unit of described PID control system is touch-screen display.
6. methylamine nitrate production automatic control system according to claim 1, is characterized in that, described vacuum extractor is vacuum pump or ejector.
7. according to the methylamine nitrate production automatic control system described in any one in claim 1-6, it is characterized in that, also comprise fault diagnosis alarm module, fault diagnosis alarm module comprises secondary instrument and is arranged at the analog quantity system in PLC electrical control gear, secondary instrument is installed on the signal output part of parallel on-line system, the analog quantity system input end in secondary instrument signal output part access PLC electrical control gear.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210580569.0A CN103901827A (en) | 2012-12-28 | 2012-12-28 | Methylamine nitrate production automatic control system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201210580569.0A CN103901827A (en) | 2012-12-28 | 2012-12-28 | Methylamine nitrate production automatic control system |
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| CN103901827A true CN103901827A (en) | 2014-07-02 |
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| CN201210580569.0A Pending CN103901827A (en) | 2012-12-28 | 2012-12-28 | Methylamine nitrate production automatic control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398917A (en) * | 2018-01-21 | 2018-08-14 | 安徽雷鸣科化股份有限公司 | A kind of unmanned control preparation method of methylamine nitrate solution |
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- 2012-12-28 CN CN201210580569.0A patent/CN103901827A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398917A (en) * | 2018-01-21 | 2018-08-14 | 安徽雷鸣科化股份有限公司 | A kind of unmanned control preparation method of methylamine nitrate solution |
| CN108398917B (en) * | 2018-01-21 | 2021-03-19 | 安徽雷鸣科化有限责任公司 | Unmanned control preparation method of methylamine nitrate solution |
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Application publication date: 20140702 |