CN106647597A - PLC (programmable logic controller) multi-stage temperature control method for fluidized bed catalytic combustion electric heating furnace - Google Patents
PLC (programmable logic controller) multi-stage temperature control method for fluidized bed catalytic combustion electric heating furnace Download PDFInfo
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- CN106647597A CN106647597A CN201610895012.4A CN201610895012A CN106647597A CN 106647597 A CN106647597 A CN 106647597A CN 201610895012 A CN201610895012 A CN 201610895012A CN 106647597 A CN106647597 A CN 106647597A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000007084 catalytic combustion reaction Methods 0.000 title abstract 4
- 238000005485 electric heating Methods 0.000 title abstract 2
- 238000010438 heat treatment Methods 0.000 claims abstract description 19
- 238000006243 chemical reaction Methods 0.000 claims abstract description 15
- 230000008569 process Effects 0.000 claims abstract description 7
- 238000012886 linear function Methods 0.000 claims abstract description 4
- 239000012530 fluid Substances 0.000 claims description 12
- 230000003197 catalytic effect Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 5
- 238000002485 combustion reaction Methods 0.000 claims description 4
- 230000010455 autoregulation Effects 0.000 claims description 3
- 238000004519 manufacturing process Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 claims description 2
- 238000012887 quadratic function Methods 0.000 abstract description 3
- 230000000694 effects Effects 0.000 description 4
- 239000003054 catalyst Substances 0.000 description 3
- 238000006555 catalytic reaction Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- 239000007788 liquid Substances 0.000 description 3
- 239000012855 volatile organic compound Substances 0.000 description 3
- 238000000746 purification Methods 0.000 description 2
- 230000004044 response Effects 0.000 description 2
- 230000006641 stabilisation Effects 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000003889 chemical engineering Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000001627 detrimental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000006870 function Effects 0.000 description 1
- 238000002309 gasification Methods 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- 239000010815 organic waste Substances 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 231100000331 toxic Toxicity 0.000 description 1
- 230000002588 toxic effect Effects 0.000 description 1
- 239000002912 waste gas Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/05—Programmable logic controllers, e.g. simulating logic interconnections of signals according to ladder diagrams or function charts
- G05B19/058—Safety, monitoring
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/30—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature
- G05D23/32—Automatic controllers with an auxiliary heating device affecting the sensing element, e.g. for anticipating change of temperature with provision for adjustment of the effect of the auxiliary heating device, e.g. a function of time
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/10—Plc systems
- G05B2219/16—Plc to applications
- G05B2219/163—Domotique, domestic, home control, automation, smart, intelligent house
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Incineration Of Waste (AREA)
- Control Of Temperature (AREA)
Abstract
The invention provides a PLC multi-stage temperature control method for a fluidized bed catalytic combustion electric heating furnace. Aiming at the dense phase section and the dilute phase section of the fluidized bed, the heating voltage is controlled through the output of the PLC, and the aims of controlling the temperature and the heating rate are fulfilled. The temperature rise section is divided into a plurality of intervals, and each interval corresponds to different temperature rise rates, so that the fluidized bed can be rapidly heated at any initial temperature. When the temperature is close to an ideal value, the PID undisturbed switching is realized by setting a set value of the PID controller to track the temperature feedback value. According to the invention, the PLC output value and the actual voltage value are subjected to piecewise function fitting according to the characteristics of the solid-state voltage regulator, quadratic function fitting is adopted in a low-voltage section, and linear function fitting is adopted in the rest. The invention can realize the rapid start and temperature rise of the fluidized bed catalytic combustion at any point, and well ensure the constant temperature of the fluidized bed in the catalytic combustion process through the undisturbed switching of the parameters of the PID controller, so that the reaction is effectively carried out.
Description
Technical field
The invention belongs to Chemical Engineering fluidized bed catalytic burning industry field and industrial automation technology crossing domain, specifically
It is related to a kind of automatic temperature rise control of fluidized bed catalytic burning electric furnace PLC multistages.
Background technology
Organic exhaust gas (VOC Volatile Organic Compound abbreviation VOC) are both Toxic
Matter, but it is inflammable and explosive, it is pollutant atmosphere, the arch-criminal being detrimental to health.Catalysis burning can be seen in some sense
A kind of chemical thermal response of flame combustion is that instead of, using the treating technology activity of catalyst by organic component in burning-point
Following temperature and gasification symphysis are into nontoxic CO2And H2O, reaches purification purpose.Therefore, fluid bed is adopted in technique and is consolidated
Organic exhaust gas and waste liquid are carried out purified treatment by fixed bed by being catalyzed burning.Fluid bed internal temperature rapid increase is simultaneously stably being urged
It is that reaction is successfully crucial to change burning temperature required.
In fluid bed concentrated phase section, respectively external electric furnace carries out intensification control to the present invention with dilute phase section.Due to electric furnace
With big inertia, large time delay characteristic, temperature is difficult to realize quick non-overshooting control.The present invention is directed to the problems referred to above, provides one kind
Programmable Logic Controller (PLC) multistage intensification autocontrol method, realizes that the temperature of fluidized bed catalytic burning electric furnace can be most
Short time non-overshoot is reached needed for reaction, and it is constant to carry out stage holding temperature of reactor in catalyst combustion reaction.
The content of the invention
The purpose of the present invention is VOC tail gas to be carried out in fluid bed be catalyzed the starting stage that burning is processed, by fluidized bed
Layer is divided into concentrated phase section, dilute phase section and diffuser, and is provided with electric heater unit in fluid bed external position, is heated up, and makes temperature
Initial temperature needed for catalysis burning is rapidly achieved, while carrying out insulation effect to fluid bed during the entire process of reaction, is maintained
Fluidized-bed temperature is constant, reaction is steadily carried out.
The present invention provides technical scheme below and realizes process：
The electric furnace PLC multistage temp. control methods the invention provides a kind of fluidized bed catalytic burns, it is characterised in that：For
The concentrated phase section of catalyst combustion reaction and dilute phase section, provide respectively the automatic temperature rise control method of PLC multistages.The method is by whole process
It is divided into warming-up section temperature control and constant temperature zone temperature control, the control of warming-up section adopts different rates totally six sections of temperature rise range restraints, realizes appointing
Meaning initial temperature point is rapidly heated, PID control that constant temperature zone temperature control is adjusted using multi-parameter.The present invention seeks to make fluid bed
Catalysis burning electric furnace temperature can shortest time non-overshoot reach reaction it is temperature required, and the fluidized-bed reaction stage protect
Hold temperature of reactor constant.
The characteristics of having big inertia large time delay due to heating furnace, using simple PID effects very big overshoot can be produced,
Cause temperature to be difficult to return to setting value, so as to cause reaction effect to decline, or even the danger that body of heater is damaged occurs.Warming-up section is divided into
Six calefactive interzones, the different heating rate of each subinterval correspondence, so as to ensure that fluid bed peripheral hardware electric furnace is arbitrarily rising
Can accomplish to be rapidly heated at beginning temperature.First interval full voltage starting, by normal temperature interval maximum of T is quickly ramped up to0；Second interval
With Δ T per minute1Heating rate by T0Rise to T1；3rd interval is with Δ T2Speed per minute is by T1Rise to T2, the 4th is interval
With Δ T3Speed per minute is by T2Rise to T3；5th interval is with Δ T4Speed per minute is by T3Rise to T4, work as in the 6th interval
Temperature reaches T4When, it is switched to PID and automatically controls.
When furnace temp is less than T4When arrange PID setting value tracking temperature feedback values, so as to ensure to reach T in temperature4Throw
Enter to be realized when PID is automatically controlled the automatic switching undisturbed of hand, change desired temperature is for needed for reaction after the completion of switching
Tset, make electric furnace temperature remain stable all the time by PID autoregulations.After input is automatic, two groups are arranged not to PID
Same parameter, temperature actual value is more than T with the absolute value of setting value deviationdiv, temperature actual value and setting value deviation absolute value it is little
In TdivTwo kinds of situation correspondence difference pid parameters, optimize PID temperature control system performances.Simultaneously arrival temperature upper limit is arranged to furnace temperature to break
Electric program, prevents production accident.
During PLC is realized, the given voltage of heating furnace is adjusted using solid-state voltage regulator, the present invention is according to solid-state voltage regulator
PLC output valves and actual voltage value are carried out piecewise function fitting by characteristic, in V0-V1It is interval to be fitted using quadratic function, V1-V2
Interval meets linear relationship and adopts linear function fit.
Description of the drawings
Fig. 1 is the concrete temperature rise protocol procedures figure of the present invention.
Fig. 2 is that solid-state voltage regulator low pressure stage voltage (0-60V) of the present invention and PLC export matched curve figure.
Fig. 3 is that solid-state voltage regulator high pressure section voltage (60V-220V) of the present invention and PLC export matched curve figure.
Fig. 4 is the calefactive interzone and speed man-machine interface figure of the present invention.
Fig. 5 be the present invention be embodied as temperature rise curve figure
Specific embodiment
Case study on implementation：Fluidized bed catalytic burning electric furnace PLC multistage temp. control methods, at a kind of organic waste gas-liquid purification
Application during reason.
Whole implementation scheme is as shown in figure 1, using two fluid beds and a fixed bed to waste gas in the technical process
Liquid carries out purified treatment, and wherein fluid bed outside arranges two sections of single-phase 220V, and 15KW electric furnaces, whole technical process requires stream
Change bed quickly to start in normal temperature or arbitrfary point temperature, two hours of used time are warmed up to and are catalyzed 350 DEG C of the initial temperature burnt, and
By temperature stabilization to 350 DEG C in ensuing two hours, maintain reaction temperature constant until reaction terminates.
PLC output signals are carried out curve fitting with solid-state voltage regulator output voltage before intensification, draws matched curve,
0V-60V is interval to be fitted using quadratic function, and concrete functional relation is：Y=3E-07x2+ 0.000x-22.37 (Fig. 2), 60V-
220V intervals meet linear relationship and adopt linear function fit, and concrete functional relation is y=0.011x-104.3 (Fig. 3), its
Middle y is the given magnitude of voltage of solid-state relay response, and x is PLC output valves.Pressure regulator dynamic characteristic is drawn by curve matching.
The intensification of heating furnace adopts the lifting method of by stages.First interval 220V full voltage starting, by normal temperature in 20 minutes
100 DEG C are quickly ramped up to, the quick radiator of heating furnace is made；Second interval rises to 150 DEG C with 7 DEG C per minute of heating rate by 100 DEG C,
3rd interval is switched to after heating up 7 minutes；3rd interval rises to 200 with 6 DEG C of ramps per minute 8 minutes by 150 DEG C
℃；4th interval rises to 250 DEG C in 10 minutes with 5 DEG C of ramps per minute by 200 DEG C, progressively slows down heating rate；5th
Interval rises to 300 DEG C in 25 minutes with 2 DEG C of ramps per minute by 250 DEG C, further slows down intensification trend and makes heating furnace
The preheating release of early stage；In the 6th interval when temperature reaches 300 DEG C, it is switched to PID and automatically controls, suitable PID controls is set
Device parameter processed, rose to 350 DEG C in 50 minutes.
By above-mentioned temperature rise program into PLC control program, each calefactive interzone and corresponding heating rate are set to write from memory
Recognize parameter read-in PLC program, it is ensured that can all give tacit consent to when heating up again every time and above-mentioned parameter be initialized to control program.According to work
Skill requirement, sets the T in control flow chart0For 300 DEG C, when heating furnace temperature reaches 300 degrees Celsius, it is switched to PID and automatically controls,
Now can be to temperature currency and deviation e of setting valuetJudged, if less than 15 DEG C, to prevent temperature too high, stove is set
Warm peak is 400 DEG C, and when furnace temperature reaches 400 DEG C, PLC control pressure regulators are output as 0V and stop heating.When user needs
When modifying to parameter, parameter interface modification (Fig. 4) is logged into by man-machine interface keeper.
PID setting value tracking temperature feedback values are set when furnace temp is less than 300 DEG C, so as to ensure to reach in temperature
300 DEG C of input PID realize the automatic switching undisturbed of hand when automatically controlling, and desired temperature is changed after the completion of switching to react institute
350 DEG C for needing, make electric furnace temperature remain stable all the time by PID autoregulations.After input is automatic, arrange to PID
The absolute value of two groups of different parameters, temperature actual value and the deviation of setting value 350 is more than 15 DEG C, temperature actual value and setting value deviation
Absolute value less than 15 DEG C of two kinds of situations correspondence difference pid parameters, optimize PID temperature control system performances.
Temperature data in man-machine interface is derived and mapped, can be very good to reflect this temperature rise according to temperature control curve figure
Be rapidly heated feature and course of reaction of method maintains the validity (Fig. 5) of temperature stabilization.
Claims (4)
1. the invention provides a kind of fluidized bed catalytic burning electric furnace PLC multistage temp. control methods, it is characterised in that：For urging
Change the concentrated phase section and dilute phase section of combustion reaction, the automatic temperature rise control method of PLC multistages is given respectively.The method divides whole process
For warming-up section temperature control and constant temperature zone temperature control, the control of warming-up section is realized any totally using different rates six sections of temperature rise range restraints
Initial temperature point is rapidly heated, PID control that constant temperature zone temperature control is adjusted using multi-parameter.The present invention seeks to urge fluid bed
Change burning electric furnace temperature can shortest time non-overshoot reach reaction it is temperature required, and the fluidized-bed reaction stage keep
Temperature of reactor is constant.
2. according to claim 1, warming-up section is divided into six calefactive interzones, the different heating rate of each subinterval correspondence, so as to
Ensure that fluid bed peripheral hardware electric furnace can be accomplished to be rapidly heated at any initial temperature.First interval full voltage starting, by normal
Temperature is quickly ramped up to interval maximum of T0；Second interval is with Δ T per minute1Heating rate by T0Rise to T1；3rd interval is with Δ T2
Speed per minute is by T1Rise to T2, the 4th interval is with Δ T3Speed per minute is by T2Rise to T3；5th interval is with Δ T4Per point
The speed of clock is by T3Rise to T4, in the 6th interval when temperature reaches T4When, it is switched to PID and automatically controls.
3. according to claim 1, when furnace temp is less than T4When arrange PID setting value tracking temperature feedback values, so as to ensure
Temperature reaches T4Input PID realizes the automatic switching undisturbed of hand when automatically controlling, and desired temperature is changed after the completion of switching and is
T needed for reactionset, make electric furnace temperature remain stable all the time by PID autoregulations.After input is automatic, to PID
Two groups of different parameters are set, and temperature actual value is more than T with the absolute value of setting value deviationdiv, temperature actual value and setting value deviation
Absolute value be less than TdivTwo kinds of situation correspondence difference pid parameters, optimize PID temperature control system performances.Furnace temperature is arranged simultaneously is reached
Temperature upper limit power-down procedure, prevents production accident.
4., according to claim 1, during PLC is realized, the given voltage of heating furnace, root of the present invention are adjusted using solid-state voltage regulator
PLC output valves and actual voltage value are carried out into piecewise function fitting according to solid-state voltage regulator characteristic, in V0-V1Interval adopts secondary letter
Number fitting, V1-V2Interval meets linear relationship and adopts linear function fit.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610895012.4A CN106647597A (en) | 2016-10-11 | 2016-10-11 | PLC (programmable logic controller) multi-stage temperature control method for fluidized bed catalytic combustion electric heating furnace |
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| CN201610895012.4A CN106647597A (en) | 2016-10-11 | 2016-10-11 | PLC (programmable logic controller) multi-stage temperature control method for fluidized bed catalytic combustion electric heating furnace |
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| CN201610895012.4A Pending CN106647597A (en) | 2016-10-11 | 2016-10-11 | PLC (programmable logic controller) multi-stage temperature control method for fluidized bed catalytic combustion electric heating furnace |
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Cited By (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108096713A (en) * | 2017-12-18 | 2018-06-01 | 西安豪丰工业科技实业有限公司 | The hot application device and its temperature-rising method that a kind of controllable temperature rises |
| CN109343352A (en) * | 2018-12-17 | 2019-02-15 | 山东大学 | A kind of temprature control method and system based on timing-optimal control |
| CN110124594A (en) * | 2019-06-03 | 2019-08-16 | 常州瑞曦生物科技有限公司 | Fine chemistry industry temperature of reaction kettle control method |
| CN111708388A (en) * | 2020-07-20 | 2020-09-25 | 金陵科技学院 | Boiler pressure regulation prediction control method based on GRU-PID |
| CN112023846A (en) * | 2020-08-21 | 2020-12-04 | 北京泊菲莱科技有限公司 | Electric heating fine control method for reaction kettle |
| CN112667006A (en) * | 2021-01-19 | 2021-04-16 | 中广核久源（成都）科技有限公司 | Thermostatic control system for large hysteresis heating system |
| CN113282120A (en) * | 2021-07-20 | 2021-08-20 | 深圳市佳运通电子有限公司 | Time-limited heating method and temperature control method for heating furnace |
| CN114296496A (en) * | 2021-12-30 | 2022-04-08 | 北京精仪天和智能装备有限公司 | Temperature control method and device |
| CN114459149A (en) * | 2021-12-28 | 2022-05-10 | 中国航天空气动力技术研究院 | Heat accumulating type wind tunnel electric preheating heater system and control method |
| CN114675682A (en) * | 2021-11-10 | 2022-06-28 | 上海微创惟美医疗科技(集团)有限公司 | Temperature control method and device for medical instrument and therapeutic apparatus |
| CN117389358A (en) * | 2023-12-12 | 2024-01-12 | 广东摩尔物联技术有限公司 | Temperature control method, device, control equipment and reaction kettle |
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Cited By (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108096713A (en) * | 2017-12-18 | 2018-06-01 | 西安豪丰工业科技实业有限公司 | The hot application device and its temperature-rising method that a kind of controllable temperature rises |
| CN109343352A (en) * | 2018-12-17 | 2019-02-15 | 山东大学 | A kind of temprature control method and system based on timing-optimal control |
| CN110124594A (en) * | 2019-06-03 | 2019-08-16 | 常州瑞曦生物科技有限公司 | Fine chemistry industry temperature of reaction kettle control method |
| CN111708388B (en) * | 2020-07-20 | 2022-08-02 | 金陵科技学院 | Boiler pressure regulation prediction control method based on GRU-PID |
| CN111708388A (en) * | 2020-07-20 | 2020-09-25 | 金陵科技学院 | Boiler pressure regulation prediction control method based on GRU-PID |
| CN112023846A (en) * | 2020-08-21 | 2020-12-04 | 北京泊菲莱科技有限公司 | Electric heating fine control method for reaction kettle |
| CN112667006A (en) * | 2021-01-19 | 2021-04-16 | 中广核久源（成都）科技有限公司 | Thermostatic control system for large hysteresis heating system |
| CN113282120A (en) * | 2021-07-20 | 2021-08-20 | 深圳市佳运通电子有限公司 | Time-limited heating method and temperature control method for heating furnace |
| CN113282120B (en) * | 2021-07-20 | 2021-09-21 | 深圳市佳运通电子有限公司 | Time-limited heating method and temperature control method for heating furnace |
| CN114675682A (en) * | 2021-11-10 | 2022-06-28 | 上海微创惟美医疗科技(集团)有限公司 | Temperature control method and device for medical instrument and therapeutic apparatus |
| WO2023082862A1 (en) * | 2021-11-10 | 2023-05-19 | 上海微创惟美医疗科技(集团)有限公司 | Temperature control method and apparatus for medical instrument, and therapeutic apparatus |
| CN114459149A (en) * | 2021-12-28 | 2022-05-10 | 中国航天空气动力技术研究院 | Heat accumulating type wind tunnel electric preheating heater system and control method |
| CN114296496A (en) * | 2021-12-30 | 2022-04-08 | 北京精仪天和智能装备有限公司 | Temperature control method and device |
| CN117389358A (en) * | 2023-12-12 | 2024-01-12 | 广东摩尔物联技术有限公司 | Temperature control method, device, control equipment and reaction kettle |
| CN117389358B (en) * | 2023-12-12 | 2024-03-01 | 广东摩尔物联技术有限公司 | Temperature control method, device, control equipment and reaction kettle |
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Application publication date: 20170510 |
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