CN206975423U - A kind of temperature control equipment - Google Patents
A kind of temperature control equipment Download PDFInfo
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- CN206975423U CN206975423U CN201720703553.2U CN201720703553U CN206975423U CN 206975423 U CN206975423 U CN 206975423U CN 201720703553 U CN201720703553 U CN 201720703553U CN 206975423 U CN206975423 U CN 206975423U
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Abstract
The utility model discloses a kind of temperature control equipment, it is related to steelmaking technical field；Including combustion air Flow-rate adjustment module, temperature adjustment module；Combustion air Flow-rate adjustment module connects mixed gas pipeline by gas flow meter；Combustion air Flow-rate adjustment module connects mixed gas pipeline by gas calorific value apparatus；Combustion air Flow-rate adjustment module connects the combustion-supporting wind pipeline by combustion air flowmeter；Combustion air Flow-rate adjustment module connects combustion-supporting wind pipeline by combustion air regulating butterfly valve；Temperature adjustment module obtains the temperature of clad by infrared radiation thermometer；Temperature adjustment module connects the mixed gas pipeline by the coal gas regulating butterfly valve, obtains electric signal, and the flow of coal gas in coal gas regulation coal valve regulation mixed gas pipeline is controlled according to electric signal；It is simple and convenient, realize temperature accurate measurement and accurately control, save the energy, ensure product quality, extend the service life of Ladle-casting apparatus, it is cost-effective.
Description
Technical field
It the utility model is related to steelmaking technical field.
Background technology
The smelting of steel-making and continuous casting need substantial amounts of great Bao and middle bag turnover.Offline great Bao and middle bag generally require
800 DEG C -1000 DEG C or so are baked to by Ladle-casting apparatus to come into operation.
The defects of due to electric thermo-couple temperature detection mode, clad bad environments and medium are dirty, cause current ladle baking
The instrumentation well damage such as device thermocouple, regulating valve, current many steel mills ladle baking are substantially open baking, mainly
Problems be present：
(1), thermocouple measurement mode, temperature detection are forbidden, and thermocouple is fragile, and maintenance is big, it is inconvenient to change.It is conventional
Infrared measurement of temperature mode, it is vulnerable to the interference of flame and hot gas, detection temperature differs greatly with weld temperature, and temperature can not be accurate
Overtemperature be present or owe warm situation in measurement, ladle temperature；
(2) when, toasting gas pressure, hot-restriking die, gas flow can not be adjusted in time, wastes substantial amounts of coal gas；
(3) time-out baking phenomenon, be present；Baking time deficiency be present, ladle temperature is relatively low, influences to make steel quality and ladle
The phenomenon in life-span；
(4), the easy fouling of mixed gas, it is stuck that straight-through single seat or regulating valve of two-seater easily cause regulating valve, can not act, standard
Coal gas orifice plate preferably blocks；
(5), temperature control is difficult using bicrossing limitation mode parameter tuning, is not easy to realize；
(6), open roasting bag, the waste of the energy is not only resulted in, and shortens the service life of refractory material.
Utility model content
The technical problems to be solved in the utility model is to be directed to above-mentioned the deficiencies in the prior art, there is provided a kind of temperature control dress
Put, it is simple and convenient, realize temperature accurate measurement and accurately control, save the energy, ensure product quality, extend the use of Ladle-casting apparatus
It is life-span, cost-effective.
In order to solve the above technical problems, technical solution adopted in the utility model is：Applied to being connected with combustion-supporting airduct
The steel-making Ladle-casting apparatus in road, mixed gas pipeline, the steel-making Ladle-casting apparatus include ladle and clad, it is characterised in that:Including combustion-supporting
Wind flow adjustment module, temperature adjustment module, gas flow meter, gas calorific value apparatus, combustion air flowmeter, combustion air regulation butterfly
Valve, coal gas regulating butterfly valve, infrared radiation thermometer；
The combustion air Flow-rate adjustment module connects mixed gas pipeline by gas flow meter；
The combustion air Flow-rate adjustment module connects mixed gas pipeline by gas calorific value apparatus；
The combustion air Flow-rate adjustment module connects the combustion-supporting wind pipeline by combustion air flowmeter；
The combustion air Flow-rate adjustment module connects the combustion-supporting wind pipeline by combustion air regulating butterfly valve；
The temperature adjustment module connects clad by infrared radiation thermometer；
The temperature adjustment module connects the mixed gas pipeline by coal gas regulating butterfly valve.
Preferably, combustion air Flow-rate adjustment module includes：
Air-fuel ratio acquiring unit, multiplier, combustion air flow setting value acquiring unit, combustion-supporting wind flow automatically adjust list
Member；
The air-fuel ratio acquiring unit input connects mixed gas pipeline by gas calorific value apparatus, and the air-fuel ratio obtains
The input of the output end connection multiplier of unit；
One input of the multiplier connects mixed gas pipeline by gas flow meter, and another of multiplier is defeated
Enter end connection air-fuel ratio acquiring unit；The input of the output end connection combustion air flow setting value acquiring unit of the multiplier
End；
The output end of the combustion air flow setting value acquiring unit connects combustion-supporting wind flow automatic adjustment unit；It is described to help
Fire the input connection multiplier of wind flow setting value acquiring unit；
The input connection combustion air flowmeter of the combustion-supporting wind flow automatic adjustment unit, combustion-supporting wind flow are automatic
Another input connection combustion air flow setting value acquiring unit of adjustment unit；The combustion-supporting wind flow automatic adjustment unit
Output end connection combustion air regulating butterfly valve.
Preferably, temperature adjustment module includes：
Temperature sets curve generation unit, temperature automatic control unit；
One input of the temperature setting curve generation unit output end connection temperature automatic control unit；
The temperature automatic control unit an input connection infrared radiation thermometer, temperature automatic control unit it is another
Individual input connection temperature setting curve generation unit；The output end connection coal gas regulation butterfly of the temperature automatic control unit
Valve.
Preferably, gas flow is calculated as annular oriffice gas flow meter.
Preferably, infrared radiation thermometer is specific wavelength infrared radiation thermometer.
Preferably, annular oriffice gas flow, which is calculated as annular oriffice, matches somebody with somebody differential pressure transmitter, orifice plate model LGH, differential pressure
Transmitter is EJA110A.
It is using beneficial effect caused by above-mentioned technical proposal：The utility model is simple and convenient, realizes that temperature is accurate
Measure and accurately control, save the energy, ensure product quality, extend the service life of Ladle-casting apparatus, it is cost-effective；Passed by changing
The temperature bicrossing limitation temperature control mode of system, temperature setting curve controlled mode is changed to, parameter tuning is simple, easily real
It is existing；Change electric thermo-couple temperature metering system, be changed to measure Ladle-casting apparatus temperature from specific wavelength infrared radiation thermometer mode；Change mark
Quasi- orifice plate measures mixed gas flow, is changed to annular oriffice measurement mixed gas flow；Change straight-through single seat or regulating valve of two-seater,
Mixed gas and combustion-supporting wind flow are adjusted the mode for being changed to pneumatically or electrically butterfly valve, and improve instrumentation uses the longevity
Life and the accuracy for obtaining measurement parameter.A kind of Ladle-casting apparatus air-fuel ratio of utility model and the relation of mixed gas calorific value simultaneously, make
Actual mixing ratio βnChange in real time with calorific value, the system and method are simple and practical to be easily achieved, and is in Ladle-casting apparatus temperature control
Automatic Control state, really realize steel-making Ladle-casting apparatus temperature control.Practical application shows：The utility model, save Mixture Density Networks
Gas 40-50%；Improve 100-200 DEG C of baking temperature of steel ladle；Improve the service life of ladle, ensure Ladle-casting apparatus energy-conservation, efficiently,
Safe and stable operation.
The relation of the actual mixing ratio by calorific value of gas change with gas flow be present in combustion air flow setting value, so,
Combustion-supporting wind flow just follows the change of gas flow, is controlled by the actual mixing ratio changed according to mixed gas calorific value, institute
Ensure that the optimization of Ladle-casting apparatus Combustion System, accomplish the completely burned of mixed gas, realize steel-making Ladle-casting apparatus most
Optimal control, energy-conservation reached, improved the purpose of baking quality.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model；
Fig. 2 is the curve map of one embodiment of the utility model steel-making Ladle-casting apparatus desired temperature；
Fig. 3 is the desired temperature curve of embodiment 1.
In figure：1st, gas flow meter；2nd, gas calorific value apparatus；3rd, combustion air flowmeter；4th, combustion air regulating butterfly valve；5th, coal gas
Regulating butterfly valve；6th, infrared radiation thermometer；7th, air-fuel ratio acquiring unit；8th, multiplier；9th, combustion air flow setting value acquiring unit；
10th, combustion-supporting wind flow automatic adjustment unit；11st, temperature setting curve generation unit；12nd, temperature automatic control unit；13rd, it is combustion-supporting
Wind flow adjustment module；14th, temperature adjustment module.
Embodiment
The utility model is described in further detail with reference to the accompanying drawings and detailed description.
As shown in figure 1, be a kind of one embodiment of temperature control equipment of the utility model,
Applied to the steel-making Ladle-casting apparatus for being connected with combustion-supporting wind pipeline, mixed gas pipeline, the steel-making Ladle-casting apparatus includes steel
Bag and clad, it is characterised in that:Including combustion air Flow-rate adjustment module 13, temperature adjustment module 14, gas flow meter 1, coal gas
Caloric value instrument 2, combustion air flowmeter 3, combustion air regulating butterfly valve 4, coal gas regulating butterfly valve 5, infrared radiation thermometer 6；
The combustion air Flow-rate adjustment module 13 connects mixed gas pipeline by gas flow meter 1, is mixed for obtaining
Gas flow in gas piping；
The combustion air Flow-rate adjustment module 13 connects mixed gas pipeline by gas calorific value apparatus 2, for obtaining coal gas
Calorific value；
The combustion air Flow-rate adjustment module 13 connects the combustion-supporting wind pipeline by combustion air flowmeter 3, for obtaining
The flow of combustion air in combustion-supporting wind pipeline；
The combustion air Flow-rate adjustment module 13 connects the combustion-supporting wind pipeline by combustion air regulating butterfly valve 4, for root
After obtaining electric signal according to the flow of the gas flow of acquisition, the calorific value of coal gas, combustion air, helped according to electric signal control
Combustion wind regulating butterfly valve 4 adjusts the combustion-supporting wind flow of combustion-supporting wind pipeline；
The temperature adjustment module 14 obtains the temperature of clad by infrared radiation thermometer 6；
The temperature adjustment module 14 connects the mixed gas pipeline by the coal gas regulating butterfly valve 5, for basis
The temperature of the clad of acquisition and default temperature obtain electric signal, control the coal gas to adjust coal valve according to the electric signal and adjust
Save the flow of coal gas in mixed gas pipeline.
Combustion air Flow-rate adjustment module 13, temperature adjustment module 14 are all completed in PLC control system.
Preferably, gas flow meter 1 is annular oriffice gas flow meter.
Preferably, infrared radiation thermometer 6 is specific wavelength infrared radiation thermometer.
Preferably, annular oriffice gas flow, which is calculated as annular oriffice, matches somebody with somebody differential pressure transmitter, orifice plate model LGH, differential pressure
Transmitter is EJA110A.
Gas calorific value apparatus 2 is German SMART2006 series caloric value instrument；Standard orifice plate combustion air flowmeter 3 throttles for standard
Device matches somebody with somebody differential pressure transmitter, orifice plate model LGB, differential pressure transmitter EJA110A；Combustion air regulating butterfly valve 4 is ZKJW-0.6S
Type motorized adjustment butterfly valve (DN200)；Coal gas regulating butterfly valve 5 is ZKJW-0.6S type motorized adjustment butterfly valves (DN150)；Specific wavelength
Infrared radiation thermometer 6 is the inferior Pro SWF-16-30-C-FE types of U.S.'s William；PLC control system is Siemens S7-300 PLC system
System.
The utility model is simple and convenient, realizes temperature accurate measurement and accurately controls, and saves the energy, ensures product quality,
Extend the service life of Ladle-casting apparatus, it is cost-effective；Change electric thermo-couple temperature metering system, be changed to select specific wavelength infrared measurement of temperature
The mode of instrument 6 measures Ladle-casting apparatus temperature, by setting specific wavelength, flame and hot gas can be overcome to disturb, direct accurate measurement
Ladle inner wall refractory temperatures；Moreover, temperature measurer installation is simple, probe and the design of temperature measurer split are employed, is not easy
Damage, replacing is easy to use, and detection temperature is accurate, and ladle temperature control is good；Change standard orifice plate measurement mixed gas flow,
Annular oriffice measurement mixed gas flow is changed to, annular oriffice gas flow meter is not easily blocked, and using more convenient, measurement is more accurate
Really；Change straight-through single seat or regulating valve of two-seater, the mode for being changed to pneumatically or electrically butterfly valve are entered to mixed gas and combustion-supporting wind flow
Row regulation, improve the service life of instrumentation and obtain the accuracy of measurement parameter.The simple system practicality is easily achieved,
Ladle-casting apparatus temperature control is in Automatic Control state, really realize steel-making Ladle-casting apparatus temperature control.Practical application shows：This
Utility model, save mixed gas 40-50%；Improve 100-200 DEG C of baking temperature of steel ladle；The service life of ladle is improved,
Guarantee Ladle-casting apparatus saves, is efficient, safe and stable operation.
Preferably, combustion air Flow-rate adjustment module 13 includes：
Air-fuel ratio acquiring unit 7, multiplier 8, combustion air flow setting value acquiring unit 9, combustion-supporting wind flow automatically adjust
Unit 10；
The input of air-fuel ratio acquiring unit 7 connects mixed gas pipeline by gas calorific value apparatus 2, for obtaining coal gas
Calorific value, and multiplier 8 is connected according to the calorific value of gas theoretical air-fuel ratio of acquisition, the output end of the air-fuel ratio acquiring unit 7
Input, for the air-fuel ratio of calculating to be exported to multiplier 8；
One input of the multiplier 8 connects mixed gas pipeline by gas flow meter 1, for obtaining gas pipe
The gas flow in road, and calculated according to the gas flow and air-fuel ratio of acquisition and obtain combustion air flow setting value, the multiplication
The input of the output end connection combustion air flow setting value acquiring unit 9 of device 8, for by the combustion air flow setting value of acquisition
Export to combustion air flow setting value acquiring unit 9；
The output end of the combustion air flow setting value acquiring unit 9 connects combustion-supporting wind flow automatic adjustment unit 10, uses
Exported in by combustion air flow setting value to combustion-supporting wind flow automatic adjustment unit 10；
The input connection combustion air flowmeter 3 of the combustion-supporting wind flow automatic adjustment unit 10, is helped for obtaining
Fire wind flow, the output end connection combustion air regulating butterfly valve 4 of the combustion-supporting wind flow automatic adjustment unit 10, for according to acquisition
Combustion-supporting wind flow and combustion air flow setting value calculate obtain electric signal, according to the electric signal control combustion air regulating butterfly valve
The 4 combustion-supporting wind flows of regulation.
Preferably, temperature adjustment module 14 includes：
Temperature setting curve generation unit 11, temperature automatic control unit 12；
One input of the output end connection temperature automatic control unit 12 of temperature setting curve generation unit 11, is used
Exported in by caused Ladle-casting apparatus baking temperature setting value to temperature automatic control unit 12, as temperature automatic control unit
12 default desired value carries out temperature adjustment；
The input connection infrared radiation thermometer 6 of the temperature automatic control unit 12, for obtaining the temperature of clad,
Measured value as temperature automatic control unit 12；The output end connection coal gas regulating butterfly valve of the temperature automatic control unit 12
5, the electric signal control coal gas regulation butterfly that the desired value and measured value obtained according to the temperature automatic control unit 12 of acquisition exports
Valve 5 adjusts gas flow.
Application method：
Gas flow, the calorific value of coal gas, the flow of combustion air obtained by combustion air Flow-rate adjustment module 13, and according to
The gas flow of acquisition, the calorific value of coal gas, the flow of combustion air obtain electric signal, and combustion air regulation is controlled according to the electric signal
The combustion-supporting wind flow of the combustion-supporting wind pipeline of dish valve regulation；
The temperature of clad and default desired value temperature are obtained by temperature adjustment module 14, pass through the clad of acquisition
Temperature and default desired value obtain electric signal, control the coal gas regulating butterfly valve 5 to adjust Mixture Density Networks according to the electric signal
The flow of coal gas in feed channel.
Preferably, the stream of the calorific value of the gas flow obtained by combustion air Flow-rate adjustment module 13, coal gas, combustion air
Amount, and electric signal is obtained according to the flow of the gas flow of acquisition, the calorific value of coal gas, combustion air, controlled according to the electric signal
The combustion-supporting wind flow that combustion air regulation disc valve adjusts combustion-supporting wind pipeline includes：
The mixed gas calorific value of the display of gas calorific value apparatus 2 is obtained by air-fuel ratio acquiring unit 7, and according to the Mixture Density Networks
Gas calorific value calculates actual mixing ratio；
The actual mixing ratio of the calculating of air-fuel ratio acquiring unit 7 and the coal gas of the acquisition of gas flow meter 1 are obtained by multiplier 8
Flow value, and combustion air flow setting value is obtained to the actual mixing ratio and Gas Flow value product；
Multiplier 8 is obtained by combustion air flow setting value acquiring unit 9 and calculates the combustion air flow setting value obtained work
For the desired value of combustion-supporting wind flow automatic adjustment unit 10；
Desired value and the combustion air that combustion-supporting wind flow automatically adjusts are obtained by combustion-supporting wind flow automatic adjustment unit 10
The combustion-supporting wind flow that flowmeter 3 obtains, and according to the desired value of the combustion-supporting wind flow automatic adjustment unit 10 of acquisition and combustion-supporting
Distinguished and admirable gauge 3, which is calculated, obtains electric signal, controls combustion air regulating butterfly valve 4 to adjust combustion-supporting wind flow according to the electric signal.
Preferably, the temperature of clad and default desired value temperature are obtained by temperature adjustment module 14, by obtaining
The temperature of the clad taken and default desired value obtain electric signal, and the coal gas regulating butterfly valve 5 is controlled according to the electric signal
The flow of coal gas includes in regulation mixed gas pipeline：
Curve generation unit 11 is set by temperature and produces default Ladle-casting apparatus baking temperature curve, is controlled automatically as temperature
The desired value of unit 12 processed；
The desired value of temperature automatic control unit 12 and the temperature of clad obtained by temperature automatic control unit 12, and
Desired value and the temperature of clad according to temperature automatic control unit 12 is obtained generate electric signal, and coal is controlled according to the electric signal
Gas regulating butterfly valve 5 adjusts gas flow, controls temperature.
Preferably, the mixed gas calorific value of the display of gas calorific value apparatus 2 is obtained by air-fuel ratio acquiring unit 7, and according to
The mixed gas calorific value calculates actual mixing ratio：
The mixed gas calorific value Q shown according to gas calorific value apparatus 2, calculate actual mixing ratio；Blast furnace gas calorific value 3333kJ/
m3、800kcal/m3, coke-stove gas calorific value 16720kJ/m3、4000kcal/m3, after mixing, calorific value change 418kJ/m3、
100kcal/m3When, chemically correct fuel change 0.10814, experiment draws the chemically correct fuel β of Ladle-casting apparatus mixed gas0Approximation
Formula is：
β0=0.0010814* (Q-800)+0.6
The coefficient of excess air of Ladle-casting apparatus is 1.03, so actual mixing ratio βnApproximate formula be：
βn=[0.0010814* (Q-800)+0.6] * 1.03
In formula：β0--- chemically correct fuel；βn--- actual mixing ratio；Q--- mixed gas calorific values, kcal/m3.
Formula is stored in PLC control system, the real-time mixed gas calorific value measured according to gas calorific value apparatus 2, system
The automatic actual mixing ratio β for calculating Ladle-casting apparatusn。
Preferably, the actual mixing ratio and gas flow meter 1 of the calculating of air-fuel ratio acquiring unit 7 are obtained by multiplier 8
The Gas Flow value of acquisition, and it is specific to obtain combustion air flow setting value to the actual mixing ratio and Gas Flow value product
For：
Temperature adjustment be finally by gas flow change realize, this require corresponding air mass flow according to
Actual mixing ratio βnIt is controlled.
The gas flow measured by gas flow meter 1, by multiplier 8, it is multiplied, is helped with the actual mixing ratio of calculating
Fire wind flow setting value.
Calculation formula is：Fad=Fg*βn
In formula：Fad--- combustion air flow setting value, m3/h；Fg--- measurement of gas flow value, m3/h；βn--- it is actual empty
Combustion ratio.
Preferably, the desired value and clad of the temperature automatic control unit 12 obtained by temperature automatic control unit 12
Temperature, and according to obtain temperature automatic control unit 12 desired value and clad temperature generate electric signal, according to the electricity
Signal control coal gas regulating butterfly valve 5 adjusts gas flow, controls the temperature to be：
Temperature automatic control unit 12 uses pid control algorithm, and temperature automatic control unit 12 is to Ladle-casting apparatus baking temperature
It is controlled by set-point temperature curve, Ladle-casting apparatus baking presets mesh of the temperature curve as temperature automatic control unit 12
Scale value；The clad temperature that infrared radiation thermometer 6 measures, the measured value as temperature automatic control unit 12；Desired value and measured value
Difference through pid control algorithm computing, and generate electric signal, temperature automatic control unit 12 exports electric signal control coal gas regulation
Butterfly valve 5, the Ladle-casting apparatus desired temperature for making actual Ladle-casting apparatus temperature control be generated in temperature setting curve generation unit 11
On.
The output of combustion air flowmeter 3 is connected with the measured value end of combustion-supporting wind flow automatic adjustment unit 10, combustion-supporting wind flow
The difference of the measured value of the setting value of automatic adjustment unit 10 and combustion-supporting wind flow automatic adjustment unit 10 is automatic through combustion-supporting wind flow
Output is connected with combustion air regulating valve after the PID arithmetic of adjustment unit 10, for adjusting the size of combustion-supporting wind flow, makes combustion air
Flow follows gas flow to be controlled by actual mixing ratio, and the valve position feedback signal of combustion air regulating butterfly valve 4 is also into combustion-supporting
Wind flow automatic adjustment unit 10 is shown.
Temperature setting curve generation unit 11 produces the roasting bag curve of temperature and time, and it is exported and temperature automatic adjustment list
The desired value end connection of member.Infrared radiation thermometer 6 is connected with the clad of Ladle-casting apparatus, and for detecting temperature in ladle, the temperature measurer leads to
Cross and set specific wavelength, flame and hot gas can be overcome to disturb, direct accurate measurement ladle inner wall refractory temperatures；And
And temperature measurer installation is simple, employs probe and the design of temperature measurer split, is hardly damaged.The output end of infrared radiation thermometer 6
It is connected with the measured value end of temperature automatic control unit 12, setting value and the temperature automatic control list of temperature automatic control unit 12
The difference of the measured value of member 12 exports after the PID arithmetic of temperature automatic control unit 12 to be connected with coal gas regulating butterfly valve 5, for adjusting
The size and then control ladle temperature for throughput of economizing on coal, make ladle temperature be controlled by temperature setting curve, coal gas regulation butterfly
The valve position feedback signal of valve 5 is also shown into temperature automatic control unit 12.
Curve generation unit 11 is set by temperature and produces default Ladle-casting apparatus baking temperature curve, is controlled automatically as temperature
The desired value of unit 12 processed is specially：
Required according to table 1, generate baking temperature and the relation curve of time, as shown in Figure 2.Temperature setting curve generation is single
Member 11 is connected with temperature automatic control unit 12, caused desired temperature curve, as the defeated of temperature automatic control unit 12
Enter, that is, the roasting temperature controlled desired value of bag.
(1) several times break t1, t2---tn, are inputted in temperature setting curve generation unit 11；
(2), in temperature setting curve generation unit 11 the input desired temperature T1 corresponding with each break,
T2---Tn；
(3) the Ladle-casting apparatus baking temperature curve of temperature and time, is generated in temperature setting curve generation unit 11；
(4), input of the Ladle-casting apparatus baking temperature curve of generation as temperature automatic control unit 12, turns into roasting bag temperature
The desired value of control.
Table 1：Ladle-casting apparatus baking temperature and baking time relation table
Such as：Input break number 1-10 can be set, time numerical value (unit：h)：1st break t1(0-288h can be set
Calmly), the 2nd break t2(0-288h can be set), the 3rd break t3(0-288h can be set), the 4th break t4(0-288h can be set
Calmly), the 10th break t10(0-288h can be set)；Corresponding roasting bag desired temperature (unit：℃)：1st
Break T1(0-TMAXCan set), the 2nd break T2(0-TMAXCan set), the 3rd break T3(0-TMAXCan set), the 4th folding
Point T4(0-TMAXCan set), the 10th break T10(0-TMAXIt can set)；0A-AB- can so be produced
BC-CD-DE-EF-FG-GH-HI-IJ 10 sections of desired temperature curves, wherein：TMAXFor the maximum of temperature.
Combustion-supporting wind flow automatic adjustment unit 10 controls the method for combustion-supporting wind flow to be：
Combustion-supporting wind flow automatic adjustment unit 10 also uses pid control algorithm, and combustion air flow setting value acquiring unit 9 is given birth to
Into combustion air flow setting value be combustion-supporting wind flow automatic adjustment unit 10 desired value；What combustion air flowmeter 3 measured helps
Fire wind flow, the measured value as combustion-supporting wind flow automatic adjustment unit 10；Desired value and the difference of measured value are calculated through PID control
Method computing, the output electric signal control combustion air regulating butterfly valve 4 of combustion-supporting wind flow automatic adjustment unit 10, makes actual combustion air
Flow is controlled on the combustion air flow setting value that combustion air flow setting value acquiring unit 9 is generated.
The relation of the actual mixing ratio by calorific value of gas change with gas flow be present in combustion air flow setting value, so,
Combustion-supporting wind flow just follows the change of gas flow, is controlled by the actual mixing ratio changed according to mixed gas calorific value, institute
Ensure that the optimization of Ladle-casting apparatus Combustion System, accomplish the completely burned of mixed gas, realize steel-making Ladle-casting apparatus most
Optimal control, energy-conservation reached, improved the purpose of baking quality.
Embodiment 1：
Certain steel-making Ladle-casting apparatus bakes overhaul bag, gas flow 0-1300Nm3/h, combustion-supporting wind flow 0-3000Nm3/h, caloric value instrument
The calorific value Q=2290kcal/m3 of display, toasts overhaul bag temperature and baking time relation is as shown in table 2.
Table 2：Ladle-casting apparatus toasts overhaul bag temperature and baking time relation table
It is as follows to make steel Ladle-casting apparatus temprature control method：
1. temperature setting curve generation unit 11 produces Ladle-casting apparatus baking temperature curve
Temperature setting curve is completed in PLC control system 13.By table 2, input break number is 6, and input time value is (single
Position：h)：1st break t1=24, the 2nd break t2=72, the 3rd break t3=96, the 4th break t4=120, the 5th break t5=
132nd, the 6th break t6=168；Corresponding desired temperature (unit：℃)：1st break T1=200, the 2nd break T2=400,
3 break T3=400, the 4th break T4=800, the 5th break T5=800, the 6th break T6=1000；0A-AB- can so be produced
BC-CD-DE-EF 6 sections of desired temperature curves.The desired temperature curve eventually formed is as shown in Figure 3.
2. temperature automatic control unit 12 is controlled to Ladle-casting apparatus baking temperature by temperature curve
Temperature automatic control unit 12 is using the pid control algorithm in Siemens S7-300 PLC, by the temperature shown in Fig. 3
Set setting value of the curve as pid algorithm, the Ladle-casting apparatus temperature that specific wavelength infrared radiation thermometer 6 measures, as pid algorithm
The difference of measured value, setting value and measured value is through pid control algorithm computing, the output electric signal control of temperature automatic control unit 12
Coal gas regulating butterfly valve 5 processed, actual Ladle-casting apparatus temperature is controlled respectively and baked what temperature setting curve generation unit 11 was generated
On bag device desired temperature.
Pid parameter is proportional band P=0.65, time of integration Ti=3min.
Actual motion shows：This kind of control method can make roasting bag temperature control in ± 10 DEG C.
3. air-fuel ratio acquiring unit 7 calculates actual mixing ratio β n
Bring Q=2290kcal/m3 into formula, obtain actual mixing ratio β n=[0.0010814* (Q-800)+0.6] * 1.03
=2.278.
4. combustion air flow setting value acquiring unit 9 produces combustion air flow setting value
The temperature adjustment of step 2 is finally to realize that this requires corresponding air by the change of gas flow
Flow is controlled according to the actual mixing ratio β n of step 3.
The gas flow Fg (0-1300Nm3/h) measured by annular oriffice gas flow meter 11, by multiplier 88, with reality
Border air-fuel ratio β n=2.278 are multiplied, and obtain combustion air flow setting value Fad (0-3000Nm3/h).
5. combustion-supporting wind flow automatic adjustment unit 10 controls combustion-supporting wind flow
Combustion-supporting wind flow automatic adjustment unit 10 is also using the pid control algorithm realization in S7-300PLC, combustion-supporting wind flow
Setting value Fad be PID setting value, measured value of the combustion-supporting wind flow that standard orifice plate combustion air flowmeter 3 measures as PID,
PID control exports the aperture for adjusting combustion air regulating butterfly valve 4.Pid parameter is proportional band P=0.75, time of integration Ti=
5.6min。
Actual motion shows：This kind of control method can make the control of combustion air flow in the range of ± (10-15) Nm3/h,
Corresponding precision can reach 0.2-0.5%.
Preferred embodiment of the present utility model is the foregoing is only, it is all at this not to limit the utility model
All any modification, equivalent and improvement made within the spirit and principle of utility model etc., should be included in the utility model
Protection domain within.
Claims (6)
- A kind of 1. temperature control equipment, applied to the steel-making Ladle-casting apparatus for being connected with combustion-supporting wind pipeline, mixed gas pipeline, the refining Steel Ladle-casting apparatus includes ladle and clad, it is characterised in that:Including combustion air Flow-rate adjustment module (13), temperature adjustment module (14), gas flow meter (1), gas calorific value apparatus (2), combustion air flowmeter (3), combustion air regulating butterfly valve (4), coal gas regulation butterfly Valve (5), infrared radiation thermometer (6)；The combustion air Flow-rate adjustment module (13) connects mixed gas pipeline by gas flow meter (1)；The combustion air Flow-rate adjustment module (13) connects mixed gas pipeline by gas calorific value apparatus (2)；The combustion air Flow-rate adjustment module (13) connects the combustion-supporting wind pipeline by combustion air flowmeter (3)；The combustion air Flow-rate adjustment module (13) connects the combustion-supporting wind pipeline by combustion air regulating butterfly valve (4)；The temperature adjustment module (14) connects clad by infrared radiation thermometer (6)；The temperature adjustment module (14) connects the mixed gas pipeline by coal gas regulating butterfly valve (5).
- 2. temperature control equipment according to claim 1, it is characterised in that combustion air Flow-rate adjustment module (13) bag Include：Air-fuel ratio acquiring unit (7), multiplier (8), combustion air flow setting value acquiring unit (9), combustion-supporting wind flow are adjusted automatically Save unit (10)；Air-fuel ratio acquiring unit (7) input connects mixed gas pipeline by gas calorific value apparatus (2), and the air-fuel ratio obtains The output end of unit (7) is taken to connect the input of multiplier (8)；One input of the multiplier (8) by gas flow meter (1) connect mixed gas pipeline, multiplier (8) it is another One input connects air-fuel ratio acquiring unit；The output end connection combustion air flow setting value of the multiplier (8) obtains single The input of first (9)；The output end of the combustion air flow setting value acquiring unit (9) connects combustion-supporting wind flow automatic adjustment unit (10)；Institute State the input connection multiplier (8) of combustion air flow setting value acquiring unit (9)；The input connection combustion air flowmeter (3) of the combustion-supporting wind flow automatic adjustment unit (10), combustion-supporting wind flow Another input connection combustion air flow setting value acquiring unit (9) of automatic adjustment unit (10)；The combustion-supporting wind flow The output end connection combustion air regulating butterfly valve (4) of automatic adjustment unit (10).
- 3. temperature control equipment according to claim 1, it is characterised in that the temperature adjustment module (14) includes：Temperature setting curve generation unit (11), temperature automatic control unit (12)；One input of temperature setting curve generation unit (11) output end connection temperature automatic control unit (12)；The input connection infrared radiation thermometer (6) of the temperature automatic control unit (12), temperature automatic control unit (12) another input connection temperature setting curve generation unit (11)；The output of the temperature automatic control unit (12) End connection coal gas regulating butterfly valve (5).
- 4. temperature control equipment according to claim 1, it is characterised in that the gas flow meter (1) is annular oriffice Gas flow meter.
- 5. temperature control equipment according to claim 1, it is characterised in that the infrared radiation thermometer (6) is that William is inferior Pro SWF-16-30-C-FE type infrared radiation thermometers.
- 6. temperature control equipment according to claim 4, it is characterised in that the annular oriffice gas flow is calculated as annular Orifice plate matches somebody with somebody differential pressure transmitter, orifice plate model LGH, differential pressure transmitter EJA110A.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720703553.2U CN206975423U (en) | 2017-06-16 | 2017-06-16 | A kind of temperature control equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201720703553.2U CN206975423U (en) | 2017-06-16 | 2017-06-16 | A kind of temperature control equipment |
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| CN206975423U true CN206975423U (en) | 2018-02-06 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444125A (en) * | 2019-08-29 | 2021-03-05 | 张家港凯胜控制设备工程有限公司 | Temperature accurate control system of walking beam furnace of hot rolling mill |
-
2017
- 2017-06-16 CN CN201720703553.2U patent/CN206975423U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112444125A (en) * | 2019-08-29 | 2021-03-05 | 张家港凯胜控制设备工程有限公司 | Temperature accurate control system of walking beam furnace of hot rolling mill |
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