CN106362648A - Heat accumulating type quick pyrolysis furnace temperature control method capable of controlling air-fuel ratio - Google Patents
Heat accumulating type quick pyrolysis furnace temperature control method capable of controlling air-fuel ratio Download PDFInfo
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- CN106362648A CN106362648A CN201610855958.8A CN201610855958A CN106362648A CN 106362648 A CN106362648 A CN 106362648A CN 201610855958 A CN201610855958 A CN 201610855958A CN 106362648 A CN106362648 A CN 106362648A
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- 238000000034 method Methods 0.000 title claims abstract description 63
- 239000000446 fuel Substances 0.000 title claims abstract description 24
- 238000000197 pyrolysis Methods 0.000 title abstract description 5
- 230000008569 process Effects 0.000 claims abstract description 17
- 230000010354 integration Effects 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 7
- 238000002156 mixing Methods 0.000 claims description 5
- 230000008859 change Effects 0.000 claims description 3
- 230000001276 controlling effect Effects 0.000 abstract description 12
- 230000001105 regulatory effect Effects 0.000 abstract description 8
- 239000002737 fuel gas Substances 0.000 abstract description 3
- 239000007789 gas Substances 0.000 description 21
- 229910000831 Steel Inorganic materials 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000010438 heat treatment Methods 0.000 description 7
- 230000005855 radiation Effects 0.000 description 5
- 238000000137 annealing Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 239000000567 combustion gas Substances 0.000 description 3
- 238000009825 accumulation Methods 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 230000007812 deficiency Effects 0.000 description 2
- 230000001419 dependent effect Effects 0.000 description 2
- 238000005192 partition Methods 0.000 description 2
- FQPGMQABJNQLLF-UHFFFAOYSA-N 4-aminooxy-2-azaniumylbutanoate Chemical compound NOCCC(N)C(O)=O FQPGMQABJNQLLF-UHFFFAOYSA-N 0.000 description 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 description 1
- 230000001174 ascending effect Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010504 bond cleavage reaction Methods 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 229920002521 macromolecule Polymers 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004899 motility Effects 0.000 description 1
- 239000011368 organic material Substances 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 230000007017 scission Effects 0.000 description 1
- 229910052710 silicon Inorganic materials 0.000 description 1
- 239000010703 silicon Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J6/00—Heat treatments such as Calcining; Fusing ; Pyrolysis
- B01J6/008—Pyrolysis reactions
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B47/00—Destructive distillation of solid carbonaceous materials with indirect heating, e.g. by external combustion
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10B—DESTRUCTIVE DISTILLATION OF CARBONACEOUS MATERIALS FOR PRODUCTION OF GAS, COKE, TAR, OR SIMILAR MATERIALS
- C10B53/00—Destructive distillation, specially adapted for particular solid raw materials or solid raw materials in special form
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10G—CRACKING HYDROCARBON OILS; PRODUCTION OF LIQUID HYDROCARBON MIXTURES, e.g. BY DESTRUCTIVE HYDROGENATION, OLIGOMERISATION, POLYMERISATION; RECOVERY OF HYDROCARBON OILS FROM OIL-SHALE, OIL-SAND, OR GASES; REFINING MIXTURES MAINLY CONSISTING OF HYDROCARBONS; REFORMING OF NAPHTHA; MINERAL WAXES
- C10G1/00—Production of liquid hydrocarbon mixtures from oil-shale, oil-sand, or non-melting solid carbonaceous or similar materials, e.g. wood, coal
-
- 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
- G05D23/1902—Control of temperature characterised by the use of electric means characterised by the use of a variable reference value
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J2219/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J2219/00049—Controlling or regulating processes
- B01J2219/00051—Controlling the temperature
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Materials Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- Wood Science & Technology (AREA)
- General Chemical & Material Sciences (AREA)
- Thermal Sciences (AREA)
- Combustion & Propulsion (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Control Of Combustion (AREA)
Abstract
The invention provides a heat accumulating type quick pyrolysis furnace temperature control method capable of controlling the air-fuel ratio. The method comprises the steps that N layers of radiant tubes are selected as a temperature control area, wherein the expected temperature is T[q], and the expected air-fuel ratio is K[q]; the unit control time interval is set as t[n]; the actual air flow of the temperature control area is measured as Q[k]; the actual fuel gas flow of the temperature control area is measured as Q[r]; the actual air-fuel ratio K is calculated through the measured Q[k] and Q[r]; the temperature T of a pyrolysis furnace zone of the temperature control area is measured; T[q] and T are introduced into a first PID controller, and a p1 value is calculated; the switched-on degree of an air regulating valve is controlled through p1; K[q] and K are introduced into a second PID controller, and a p2 value is calculated; the switched-on degree of a fuel gas regulating valve is controlled through p2; the above-mentioned process is repeated, and then control over the actual air-fuel ratio is achieved. According to the method which takes air-fuel ratio control as a main control purpose and takes dynamic temperature control over the radiant tube on-off time as an auxiliary control purpose, a uniform temperature field can be achieved.
Description
Technical field
The present invention relates to fast pyrogenation chemical field, more particularly to heat accumulating type fast pyrogenation stove furnace temperature automatically control neck
Domain, especially with respect to a kind of heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio.
Background technology
Fast pyrogenation can make carbon containing macromolecule scission of link reaction occur rapidly it is suppressed that the secondary pyrolytic reaction of thermal decomposition product
And cross-linking reaction, reduce the combustion gas in pyrolytic process and semicoke product, improve tar yield.Storage taken by heat accumulating type fast pyrogenation stove
Hot type radial canal realizes the fast pyrogenation to carbonaceous organic material as heating source.The pyrolysis zone of heat accumulating type fast pyrogenation stove is by many
Layer heat accumulation type radiant tube composition, and spaced apart in furnace body short transverse, every layer of radial canal have multiple, in the horizontal direction between
Every distribution.According to the requirement of different technique, need to form one or more uniform temperature fields.Shape for homogeneous temperature field
Become, conventional method is manually to adjust subregion gas control valve aperture size to adjust in-furnace temperature, limits single spoke simultaneously
Penetrate the high lower bound of pipe temperature, prevent radial canal temperature too low or too high, burn out radial canal and cause temperature field in furnace uneven
Method realizing one or more uniform temperature fields.In actual moving process, to reaching accurately preferred temperature in stove
The requirement of one or more homogeneous temperature fields is relatively difficult to realize, and only realizes relative uniform in sizable temperature range
Temperature field, and the seriously too high phenomenon of single radial canal temperature is also to happen occasionally.Therefore actual Control for Kiln Temperature can not be very
Good meets technological requirement, and radial canal temperature serious too high its service life of impact for a long time.So, existing heat accumulating type is quick
Pyrolysis oven temperature-controlled process is further improved.
There are multilamellar radial canal partition heating and the method controlling in applying at present, but this method needs in each area of each floor
Want more temperature controller and controllable silicon power regulator, increased cost investment.A kind of continuous annealing furnace radiating pipe is also had to add at present
Heat control method, first obtains every kind of strip steel target temperature and every kind of strip steel percent yields from historical data；Again by every kind of institute
State that strip steel target temperature is corresponding with every kind of described strip steel percent yields to be calculated, obtain every kind of described strip steel target temperature pair
The radial canal desired temperature group answered, wherein, a described radial canal desired temperature group is all included in described continuous annealing furnace
The temperature of each radial canal；Corresponding two grades of every kind of described strip steel target temperature is generated based on described radial canal desired temperature group
Heating model curve, wherein, a described radial canal desired temperature group generates described two grades of heating model curves；From institute
State and in two grades of heating model curves, call the institute all mated with current strip steel target temperature and current strip steel percent yields
State two grades of heating model curves the radial canal in each region is controlled, thus carrying out heat to described steel strip in continuous annealing furnace
Process.This method temperature control scheme is more single-minded, underaction, and needs to carry out sizable calculating, realizes complicated.
Because prior art has many deficiencies, therefore how to improve multilamellar radial canal partition heating and the side controlling
Method, improves the motility controlling, reduces cost, becomes people's problem demanding prompt solution.
Content of the invention
In order to solve prior art underaction, realize complicated, and the larger deficiency of implementation cost, the invention is intended to carrying
Go out a kind of heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio, can more flexible, simpler, be achieved at low cost
Uniform temperature field, better adapts to the requirement of technique.
The present invention proposes a kind of heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio, comprises the following steps:
, as a temperature-controlled area, described temperature-controlled area is corresponding to choose n-layer radial canal in described fast pyrogenation stove
The preferred temperature of described fast pyrogenation stove section is tq, the expectation of the corresponding described fast pyrogenation stove section of described temperature-controlled area
Air-fuel ratio kq；
Setting is t to the unit control time interval of described temperature-controlled arean；
Measuring described temperature-controlled area actual air flow is qk；
Measuring the actual gas flow of described temperature-controlled area is qr；
By measured qk、qrCalculate actual mixing ratio k in described temperature-controlled area；
Measure temperature t of the corresponding described fast pyrogenation stove section of described temperature-controlled area；
Tq and t is introduced a pid controller it is ensured that a pid controller calculates in real time, output valve is designated as p1；
P1 is incorporated in described temperature-controlled area air adjustment valve control, to control described temperature-controlled area air to adjust
The aperture of section valve；
Kq and k is introduced described 2nd pid controller it is ensured that described 2nd pid controller calculates in real time, output valve is designated as
p2；
P2 is incorporated in described temperature-controlled area gas control valve controller, to control described temperature-controlled area combustion gas to adjust
The aperture of section valve；
Repeat said process, by the control to actual mixing ratio, thus realizing the control to fast pyrogenation stove furnace temperature.
Further, comprise the following steps:
Measure temperature t (m) of each radial canal in described temperature-controlled area, wherein m is less than or equal to described temperature
The positive integer of radial canal sum in degree control zone；
Calculate meansigma methodss t of the temperature of all radial canals in described temperature-controlled areaavg；
T (m) and tavgIntroduce described 3rd pid controller it is ensured that described 3rd pid controller calculates in real time and exports
T (m) value of each radial canal in described temperature-controlled area, t (m) value is unit control time interval is tnInterior m-th of radiation
Pipe turn-off time, wherein m are more than zero, less than or equal to the integer of radial canal sum in described temperature-controlled area；
According to t (m) value of each radial canal in described temperature-controlled area, interval in unit control time is tnInterior shutoff phase
The radial canal answered.
Further, described fast pyrogenation stove arranges two or more temperature-controlled area.
Further, a described pid controller, the ratio of described 2nd pid controller, integration are obtained by trial and error procedure
And differential parameter.
Further, ratio, integration and the differential parameter of described 3rd pid controller is obtained by trial and error procedure.
Further, the maximum making a described pid controller output area is tn1, limit a pid controller
Output area is tl1～th1, wherein tl1During for described temperature-controlled area minimum load, the minimum aperture of air control valve；th1For
Described temperature-controlled area busy hour, the maximum opening of air control valve.
Further, the maximum making described 2nd pid controller output area is tn2, limit the 2nd pid controller
Output area is tl2～th2, wherein tl2During for described temperature-controlled area minimum load, the minimum aperture of gas control valve；th2For
Described temperature-controlled area busy hour, the maximum opening of gas control valve.
Further, the maximum making described 3rd pid controller output area is tn, limit the 3rd pid controller
Output area is 0～tn.
Further, by radial canal capable of reversing be used as described radial canal, the described radial canal commutation cycle capable of reversing be 50～
200 seconds, described unit control time is interval to include 8～16 described commutation cycles.
Further, described radial canal capable of reversing is made to change the integral multiple needing the time turning off to be the described commutation cycle.
The application present invention, can achieve following beneficial effect: with air-fuel ratio as master control, with dynamic control radial canal make-and-break time
Temperature control be the method for auxiliary control it is easy to improve the uniformity of different radial canal temperature in corresponding temperature field, it is to avoid single
The service life of radial canal temperature too high impact radial canal, and then it is advantageously implemented uniform temperature field, to better adapt to work
The requirement of skill.
Brief description
Fig. 1 is 1 area temperature field temperature-controlled process flow chart of the embodiment of the present invention.
Specific embodiment
Illustrate embodiments of the present invention below in conjunction with the accompanying drawings.
As shown in figure 1, it is entitled to define heat accumulation type radiant tube firstTo should the actual temperature of radial canal beIts
Middle x=1,2,3 ..., m；yx=1,2,3 ..., n.X is fast pyrogenation stove radial canal from top to bottom in the furnace body short transverse
The number of plies, yxNumber (x and y being once previously mentioned herein is this implication) for x layer radial canal.For the body of heater determining, right
Answer known x, have the y value of determination, that is, all radial canals have the title of a determination.For example,For the from top to bottom the 2nd layer the 3rd
Individual radial canal, t3 2Temperature for the from top to bottom the 2nd layer of the 3rd radial canal.
, Control for Kiln Temperature scheme, one or more homogeneous temperature field temperature control sides to be described taking 3 homogeneous temperature fields as a example
Case is similar to, and the method is not limited to 3 temperature fields.For the fast pyrogenation stove determining, radial canal is distributed the number of the number of plies and every layer
Necessarily, the method is not limited to the number of plies of following setting and every layer of radial canal number.It is provided with x=12, from top to bottom every layer of radiation
Pipe number y1=8, y2=6, y3=8, y4=6, y5=8, y6=6, y7=8, y8=6, y9=8, y10=6, y11=8, y12=6.
If x=1,2,3,4 radial canal forms 1 area temperature field, x=5, and 6,7,8 radial canal forms 2 area temperature fields, x=
9,10,11,12 radial canal forms 3 area temperature fields, and the corresponding actual temperature in three regions is t1, t2, t3；The expectation in three areas
Temperature is respectively tq1, tq2, tq3；The actual air flow in three areas is respectively qk1、qk2、qk3；The actual gas flow in three areas
It is respectively qr1、qr2、qr3；The actual mixing ratio in three areas is respectively k1、k2、k3；The expectation air-fuel ratio in three areas is respectively kq1、
kq2、kq3；T is the radial canal commutation cycle.
Single radial canalThe time period t of continuous n commutation cycle tnRegard as and once execute this temperature-controlled process
Unit control time, each commutation cycle can be 50～200 seconds, to ensure the thermometric to radial canal in certain commutation cycle
The value moment is not the moment that radial canal will commutate and just commutate.Respectively there are a gas control valve and an air in each area
Regulating valve, in the combustion gas and gas main duct in this area.Regulating gas regulating valve and air control valve, thus it is possible to vary whole area
Air and fuel gas supply amount, to change this area's load, form different temperature fields.
Taking 1 area temperature field temperature control as a example the method to be described.Radial canal 1st area Temperature valueDeposit into a dimension by fixing order
In group p [28].By the size order of array interior element numerical value, ascending arranged, leave in new array q [28].
If pid controller a, b and pid controllerIts output valve be respectively ta ', tb ' andIf tn1、tn2And tn3,
Wherein tn1For the maximum of the output area of pid controller a, tn2For the maximum of the output area of pid controller b, tn3For spoke
Penetrate pipeTemperatureClose to 1 area's radial canal mean temperature when pid controllerThe maximum of output area.Limit pid to control
The output area of device a is tl1～th1, limit the output area of pid controller b as tl2～th2, limit pid controllerDefeated
Going out scope is 0～tn3.Wherein tl1During for 1st area according to technological requirement minimum load, the minimum aperture of air control valve；th1For 1st area
During according to technological requirement minimum load, the maximum opening of air control valve；tl2During for 1st area according to technological requirement minimum load, combustion
The minimum aperture of gas regulating valve；th2During for 1st area according to technological requirement minimum load, the maximum opening of gas control valve.
Tq1And t1Introduce pid controller a, suitable ratio, integration and micro- gradation parameter are set.Guarantee pid controller a
Calculate and export ta ' value in real time.Every t second, take a ta ' value, and the process that rounds up is carried out to this value, result is stored in ta
In.Ta is incorporated in 1 area's air adjustment valve control, to control the aperture of 1 area's air control valve.
Kq1And k1Introduce pid controller b, suitable ratio, integration and micro- gradation parameter are set.Guarantee pid controller b
Calculate and export tb ' value in real time.Every t second, take a tb ' value, and the process that rounds up is carried out to this value, result is stored in tb
In.Tb is incorporated in 1 area's gas control valve controller, to control the aperture of 1 area's gas control valve.
Single radial canalThe time period t of continuous n commutation cycle tnRegard pid controller asControl the single spoke in 1st area
Penetrate the unit control time close to the control method of mean temperature for the pipe temperature.If in unit control time, single radial canal is continuous
Turn off time beWherein n value sets according to actual process situation；Integral multiple for t.
If the mean temperature of 1 area's radial canal is tavg1.To illustrate for the single radial canal in 1st area,And tavg1Introduce pid
ControllerSuitable ratio, integration and micro- gradation parameter are set.Guarantee pid controllerCalculate in real time and exportValue.
Every tnSecond, take onceValue, and this value is carried out divided by t, then round up, then be multiplied by t process, result is stored inIn.
For 1 area's radial canalThere is determinationEvery tnSecond, turn off radiation tube controller and pressSize, pin
Each radial canal cuts out in each unit control time and opens radial canal, to reach dynamic control radial canal make-and-break time
Temperature control purpose.
Note: the value moment should avoid the moment that radial canal will commutate and just commutate, such as can in the value moment
It is scheduled on 20 second moment after this radial canal completes the last commutation action；Adjust this time also dependent on technological requirement, for example
Can be before 20 second moment after the interval the last commutation action of previous unit control time be to commutation action next time
In a certain moment in time period between 20 second moment, carry out radial canal thermometric value, with avoid withValue controls radial canal break-make
The normal commutation action of process upset radial canal.
Embodiment 1
According to methods described, Binding experiment room fast pyrogenation stove is illustrating.Laboratory fast pyrogenation stove passes through west gate
Plc and wincc of sub- cpu414-2dp is controlling.Therefore consider practical situation, plc or wincc of the method programs and real
When computing complexity, and reduce that the method is independent to original control system, normal, the impact of stable operation as far as possible, this
In with labview software by opc service and plc carry out data exchange, to realize the method.
Laboratory fast pyrogenation stove one has 24 layers from top to bottom, is divided into 4 areas, and that is, every 6 floor are 1 area.Each layer has
One air control valve and a gas control valve.Ground floor has 3 radial canals, and every layer of radial canal number is 3 or 2
Alternately arranged.Therefore, there are 15 radial canals in an area.To be illustrated with 2 area temperature field temperature controls, the control method one in other areas
Sample.
First, the variable of the Boolean type of the corresponding radial canal of definition shutoff isWherein x=1,2,3 ..., m；yx
=1,2,3 ..., n.X is the number of plies of fast pyrogenation stove radial canal from top to bottom along in furnace body short transverse, yxFor x layer radial canal
Number.In plc program, newly-built data block db101, sets up the variable of 15 bool types within the data block In plc ladder diagram control program
In 2 areas radial canals turn off a normally opened contact of connecting respectively at 15 radial canal shutoffs controlling subprogram, corresponding data block
The variable of 15 bool types in db101.
Equipment of setting up in the ni opc servers of labview corresponds to actual plc, sets up 15,2nd area spoke under equipment
Penetrate pipe corresponding shutoff variableSet up 15,2nd area radial canal float type temperature variableIn corresponding plc program db block
The radial canal temperature value in 2nd area；Set up 15,2nd area radial canal float type furnace temperature temperature variable t2And t '2, wherein, t2=(t2+t
’2)/2；Set up the radial canal commutation of 15,2nd area and indicate bool type variableThe spoke in corresponding plc program db Kuai Zhong 2 area
Penetrating pipe a side gas cut off valve controls output sign and b side gas cut off valve to control output to indicate；Set up 2 area air control valve int
Type variable, (pqw570 is that actual plc analog output module is corresponding controls air control valve to the pqw570 in corresponding plc program
Ao address)；Set up 2 area's gas control valve int type variables, (pqw578 is actual plc mould to the pqw578 in corresponding plc program
The corresponding ao address controlling gas control valve of analog quantity output module).X for fast pyrogenation stove along in furnace body short transverse from upper and
The number of plies of lower radial canal, yxNumber for x layer radial canal.Wherein x=7,8,9,10,11,12, work as x=7, when 9,11, yx=3,
Work as x=8, when 10,12, yx=2.
According to technique, single radial canalContinuous 10 (also dependent on technological requirement adjustment, for example, can be 8～16
Individual, for 8 commutation cycles, commutation is not especially frequently it is ensured that radial canal is stable；For 16 commutation cycles, commutate
Time is not especially to grow it is ensured that controlling the quick effectiveness of temperature.) commutation cycle t time period t10Regard as and once execute this temperature
The unit control time of degree control method, wherein t10=10t.
Tq2And t2Introduce pid controller a, suitable ratio, integration and micro- gradation parameter are set.Guarantee pid controller a
Calculate and export ta ' value in real time.Every t second, take a ta ' value, and the process that rounds up is carried out to this value, result is stored in ta
In, ta is incorporated in 2 area's air adjustment valve controls, and changes into value corresponding with plc actual address pqw570,2nd area are empty
The aperture of gas regulating valve.
Kq2And k2Introduce pid controller b, suitable ratio, integration and micro- gradation parameter are set.Guarantee pid controller b
Calculate and export tb ' value in real time.Every t second, take a tb ' value, and the process that rounds up is carried out to this value, result is stored in tb
In, tb is incorporated in 2 area's gas control valve controllers, and changes into value corresponding with plc actual address pqw578, the combustion of 2nd area
The aperture of gas regulating valve.
If the mean temperature of 2 area's radial canals is tavg2.The radial canal determining for 2nd area, such asTo illustrate,With
tavg2Introduce pid controllerSuitable ratio, integration and micro- gradation parameter are set.Guarantee pid controllerCalculate in real time simultaneously
OutputValue.Every t10Second, take onceValue, and this value is carried out divided by t, then round up, then be multiplied by t process, result
It is stored inIn, such as=4t.Wherein,
For 2 area's radial canalsThere is determinationEvery t10Second, turn off radiation tube controller and pressSize,
I.e. the time of 4t is to radial canalIn each unit control time t10Interior closing and unlatching radial canal, to reach dynamic control
The temperature control purpose of radial canal make-and-break time.Radial canal is referred to for 2 area's others radial canal control methodsControl
Explanation.
Radial canalShutoff is to need basisCurrency determines radial canal commutation states, it is to avoid upset radiation
Manage normal commutation action.Only whenWithOne of variable is true, and maintains this state 20 seconds (can according to technique
Adjust) moment, execution turn off this radial canal action.To radial canalVariableIt is entered as fasle, you can turn off
Corresponding radial canal.
It should be noted that each embodiment above by reference to described by accompanying drawing only limits this in order to illustrate rather than
The scope of invention, it will be understood by those within the art that, right under the premise without departing from the spirit and scope of the present invention
Modification or equivalent that the present invention is carried out, all should cover within the scope of the present invention.In addition, unless stated otherwise, that
All or part of of any embodiment can use in conjunction with all or part of of any other embodiment.
Claims (10)
1. a kind of heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio, comprises the following steps:
, as a temperature-controlled area, described temperature-controlled area is corresponding described to choose n-layer radial canal in described fast pyrogenation stove
The preferred temperature of fast pyrogenation stove section is tq, the expectation air-fuel of the corresponding described fast pyrogenation stove section of described temperature-controlled area
Compare kq；
Setting is t to the unit control time interval of described temperature-controlled arean；
Measuring described temperature-controlled area actual air flow is qk；
Measuring the actual gas flow of described temperature-controlled area is qr；
By measured qk、qrCalculate actual mixing ratio k in described temperature-controlled area；
Measure temperature t of the corresponding described fast pyrogenation stove section of described temperature-controlled area；
Tq and t is introduced a pid controller it is ensured that a pid controller calculates in real time, output valve is designated as p1；
P1 is incorporated in described temperature-controlled area air adjustment valve control, to control described temperature-controlled area air control valve
Aperture；
Kq and k is introduced described 2nd pid controller it is ensured that described 2nd pid controller calculates in real time, output valve is designated as p2；
P2 is incorporated in described temperature-controlled area gas control valve controller, to control described temperature-controlled area gas control valve
Aperture；
Repeat said process, by the control to actual mixing ratio, thus realizing the control to fast pyrogenation stove furnace temperature.
2. the heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio as claimed in claim 1 is it is characterised in that wrap
Include following steps:
Measure temperature t (m) of each radial canal in described temperature-controlled area, wherein m is less than or equal to described temperature control
The positive integer of radial canal sum in area processed；
Calculate meansigma methodss t of the temperature of all radial canals in described temperature-controlled areaavg；
T (m) and tavgIntroduce described 3rd pid controller it is ensured that described 3rd pid controller calculates in real time and exports described
T (m) value of each radial canal in temperature-controlled area, t (m) value is unit control time interval is tnInterior m-th of radial canal closes
Disconnected time, wherein m are more than zero, less than or equal to the integer of radial canal sum in described temperature-controlled area；
According to t (m) value of each radial canal in described temperature-controlled area, interval in unit control time is tnInterior shutoff is corresponding
Radial canal.
3. the heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio as described in claim 1 or 2, its feature exists
In setting two or more temperature-controlled area in described fast pyrogenation stove.
4. the heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio as claimed in claim 1 is it is characterised in that lead to
Cross trial and error procedure and obtain a described pid controller, the ratio of described 2nd pid controller, integration and differential parameter.
5. the heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio as claimed in claim 2 is it is characterised in that lead to
Cross ratio, integration and the differential parameter that trial and error procedure obtains described 3rd pid controller.
6. the heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio as described in claim 1 or 2, its feature exists
In the maximum making a described pid controller output area is tn1, limit the output area of a pid controller as tl1~
th1, wherein tl1During for described temperature-controlled area minimum load, the minimum aperture of air control valve；th1For described temperature-controlled area
Busy hour, the maximum opening of air control valve.
7. the heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio as described in claim 1 or 2, its feature exists
In the maximum making described 2nd pid controller output area is tn2, limit the output area of the 2nd pid controller as tl2~
th2, wherein tl2During for described temperature-controlled area minimum load, the minimum aperture of gas control valve；th2For described temperature-controlled area
Busy hour, the maximum opening of gas control valve.
8. the heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio as claimed in claim 2 is it is characterised in that make
The maximum of described 3rd pid controller output area is tn, limit the output area of the 3rd pid controller as 0～tn.
9. the heat accumulating type fast pyrogenation furnace temperature control method controlling air-fuel ratio as claimed in claim 2 is it is characterised in that incite somebody to action
Radial canal capable of reversing is used as described radial canal, and the described radial canal commutation cycle capable of reversing is 50～200 seconds, when described unit controls
Between interval include 8～16 described commutation cycles.
10. as claimed in claim 9 control air-fuel ratio heat accumulating type fast pyrogenation furnace temperature control method it is characterised in that
Described radial canal capable of reversing is made to change the integral multiple needing the time turning off to be the described commutation cycle.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107239084A (en) * | 2017-05-03 | 2017-10-10 | 神雾科技集团股份有限公司 | The temprature control method of fast pyrogenation stove |
| CN109491421A (en) * | 2018-11-22 | 2019-03-19 | 重庆百尺竿头科技有限公司 | The intelligent temperature control system and its method recycled based on metallurgical secondary resource |
| CN110895420A (en) * | 2019-12-31 | 2020-03-20 | 湖南顶立科技有限公司 | Temperature control method and device for pyrolysis verification system |
| CN112695192A (en) * | 2020-12-17 | 2021-04-23 | 中冶南方工程技术有限公司 | Furnace temperature hybrid control method of distributed reversing regenerative heating furnace |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN107239084A (en) * | 2017-05-03 | 2017-10-10 | 神雾科技集团股份有限公司 | The temprature control method of fast pyrogenation stove |
| CN109491421A (en) * | 2018-11-22 | 2019-03-19 | 重庆百尺竿头科技有限公司 | The intelligent temperature control system and its method recycled based on metallurgical secondary resource |
| CN110895420A (en) * | 2019-12-31 | 2020-03-20 | 湖南顶立科技有限公司 | Temperature control method and device for pyrolysis verification system |
| CN112695192A (en) * | 2020-12-17 | 2021-04-23 | 中冶南方工程技术有限公司 | Furnace temperature hybrid control method of distributed reversing regenerative heating furnace |
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