CN108929945A - Heat-treatment furnace power-economizing method - Google Patents
Heat-treatment furnace power-economizing method Download PDFInfo
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- CN108929945A CN108929945A CN201710386776.5A CN201710386776A CN108929945A CN 108929945 A CN108929945 A CN 108929945A CN 201710386776 A CN201710386776 A CN 201710386776A CN 108929945 A CN108929945 A CN 108929945A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D9/00—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor
- C21D9/0081—Heat treatment, e.g. annealing, hardening, quenching or tempering, adapted for particular articles; Furnaces therefor for slabs; for billets
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21D—MODIFYING THE PHYSICAL STRUCTURE OF FERROUS METALS; GENERAL DEVICES FOR HEAT TREATMENT OF FERROUS OR NON-FERROUS METALS OR ALLOYS; MAKING METAL MALLEABLE, e.g. BY DECARBURISATION OR TEMPERING
- C21D11/00—Process control or regulation for heat treatments
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Abstract
The invention discloses a kind of heat-treatment furnace power-economizing method, including：Heat-treatment furnace is evenly dividing as several areas Ge Zilu by the length direction along heat-treatment furnace；According to the quantity of the steel plate to be processed in heat-treatment furnace and position, determine whether each area Ge Zilu is dead zone；The maximum furnace area energy efficiency temperature for obtaining heat-treatment furnace, the cooling temperature of each dead zone is determined according to maximum furnace area energy efficiency temperature.Heat-treatment furnace power-economizing method of the invention can predict the dead zone situation in heat-treatment furnace according to steel plate real time position, adjust to realize to the dynamic of furnace temperature, reduce the consumption of gas medium, play a role in energy saving.
Description
Technical field
The present invention relates to technical field of heat treatment more particularly to a kind of heat-treatment furnace power-economizing methods.
Background technique
Heat treatment is production such as low-temperature pressure container plate, boiler of power plant plate, wear-resisting steel plate high added value important use steel
The necessary means of plate.The computer system of heat-treatment furnace can generally be divided into production management computer, process control from top to bottom
Computer and the several levels of slave computer are each responsible for production technical reserve, production process control and basic automatization.Heat-treatment furnace
For the heating of steel plate, furnace temperature is carried out automatically controlling using the process computer system comprising mathematical model, while using PLC
The speed of service for controlling roller-way meets the heating required time, is the core equipment of heat treatment, controls essence for temperature and time
Degree has higher requirement.
In actual production, whether the stabilization for usually keeping furnace temperature, do not there is a certain region in steel plate or furnace in pipe furnace
Inside whether there is steel plate, computer system carries out furnace temperature setting all based on benchmark oven temperature profile.Since furnace temperature is not basis
Actual conditions are set, and heat-treatment furnace is caused to be easy to cause the waste of the energy and the loss of equipment.
Currently, the power saving for being directed to heat-treatment furnace in the prior art has carried out a series of improvement, including：
A kind of energy saving optimization control system for industrial heat treatment furnace disclosed in Chinese patent CN201120137566.0, packet
It includes：The transducing signal of parameter detecting and data acquisition module is conveyed to Contrast tuned imaging device through A/D data conversion module, in real time
Intelligent controller and host computer pass through RS485 communication module and RS485 RS 232 converter progress data exchange.It is upper
Computer is analyzed and is handled to all kinds of status datas of the industrial heat treatment furnace of acquisition, realizes the various of industrial heat treatment furnace
The early warning and diagnosis of failure and the real-time display of operating status, and the function of statistic analysis with Various types of data.The patent is logical
Perception and control that data acquisition module realizes BF's inner state are crossed, the optimization on control hardware is belonged to.
A kind of temperature-control energy-saving type heat treatment continuous furnace, packet disclosed in Chinese patent CN201220535394.7
It includes：Two burners in each pair of burner are arranged in dislocation up and down with roller stick in burner hearth and are separately mounted to two of burner hearth
On side wall, each burner extends the combustion-supporting tracheae and natural gas Guan Lian installed on the connecting pin and furnace body of hearth outer wall
It is logical.Hot air pipe and smoke exhaust pipe are respectively equipped on the heat exchanger, the hot air pipe on heat exchanger is arranged in the preheating section of burner hearth,
Smoke exhaust pipe on heat exchanger is arranged in the soaking zone of burner hearth.The heat exchanger, burner, pressure sensor, temperature sensor
And the decelerating motor in roller stick conveyer is connected to using line with controller.The patent is real by improving to furnace body itself
Existing energy conservation purpose.
A kind of novel energy-conserving continuous type normalizing heat-treatment furnace, is related to one disclosed in Chinese patent CN201210205866.7
Kind novel energy-conserving continuous type normalizing heat-treatment furnace, including preheating zone, heating zone, heat preservation zone, isothermal region and slow cooling area, preheating
The head end of the end in area, the head end of heating zone and end and heat preservation zone be sequentially connected with formed have preheating zone, heating zone and
First heat treatment section of heat preservation zone, the end of isothermal region and the head end in slow cooling area be connected to form with isothermal region ease up cold-zone and
The second heat treatment section being arranged side by side with the first heat treatment section, preheating zone are connected to the slow cooling area, the end in slow cooling area and one
To accommodate the recyclable device connection of the air of slow Cold zone ends, recyclable device is provided with to infuse the air in recyclable device
Enter the air unit into isothermal region, is connected between the end of heat preservation zone and the head end of isothermal region by heat preservation transfer device
It connects, to effectively realize energy-efficient purpose using the temperature in furnace.
But it is above-mentioned in the prior art, not according to the actual conditions in heat-treatment furnace, i.e., whether have in furnace steel plate or
Whether there is steel plate in a certain region in furnace, to there are the heat-treatment furnaces under the state of dead zone to carry out Energy Saving Control.
In the prior art that aiming at the problem that heat-treatment furnace of dead zone state carries out Energy Saving Control, the present invention is not provided
It is a kind of dead zone situation in heat-treatment furnace to be predicted, and carry out according to dead zone situation the heat-treatment furnace of temperature adjusting
Power-economizing method.
Summary of the invention
To solve the above problems, the present invention provides a kind of heat-treatment furnace power-economizing method, it can be according to steel plate real time position, in advance
Dead zone situation in calorimetric treatment furnace adjusts the dynamic of furnace temperature to realize, reduces the consumption of gas medium, play energy conservation
The effect of emission reduction.
To achieve the above object, a kind of heat-treatment furnace power-economizing method of the invention, includes the following steps：
S1, heat-treatment furnace is evenly dividing as several areas Ge Zilu along the length direction of heat-treatment furnace；
S2, the quantity according to the steel plate to be processed in heat-treatment furnace and position determine whether each area Ge Zilu is dead zone；
S3, the maximum furnace area energy efficiency temperature for obtaining heat-treatment furnace, determine each dead zone according to maximum furnace area energy efficiency temperature
Cool down temperature.
Further, heat-treatment furnace includes that shove charge area, energy saving area and heat preservation zone are chosen in step s 2 and are located at heat treatment
Multiple areas Zi Lu in the energy saving area of furnace, and determine whether multiple areas Zi Lu are dead zone.
Further, in step S2, except the Zi Lu area adjacent with energy saving any steel plate to be processed in area is located at
Any two more than in the continuous area Zi Lu without steel plate to be processed when, determine that the continuous area Zi Lu is respectively dead zone.
Further, it is determined that the specific method of the cooling temperature of each dead zone includes：
S3.1, according to the heating slope of heat-treatment furnace, the movement speed of steel plate to be processed in the heat treatment furnace, determine dead zone
Maximum can degree of cooling；
S3.2, the maximum furnace area energy efficiency temperature for obtaining heat-treatment furnace take maximum can degree of cooling and maximum furnace area energy efficiency temperature
In lesser cooling temperature of the value as dead zone.
Further, it according to the target holding temperature of the heating slope and steel plate to be processed of heat-treatment furnace, determines to be processed
The movement speed of steel plate in the heat treatment furnace.
Further, according to the position for the steel plate to be processed that will reach dead zone and its mobile speed in the heat treatment furnace
Degree determines that steel plate to be processed reaches the time interval of dead zone, according to the heating slope of the time interval and heat-treatment furnace, determines empty
The maximum in area can degree of cooling.
Further, further include, according to the cooling temperature real-time update dead zone of the original temperature of each dead zone and dead zone
Temperature.
Further, when in whole areas Zi Lu without steel plate to be processed when, heat-treatment furnace is in full dead zone state, according to most
The area great Lu energy efficiency temperature cools down to whole furnace areas of heat-treatment furnace.
Further, further include, when obtaining processing task, according to the cooling temperature of heat-treatment furnace, steel plate heating curves,
The heating slope of heat-treatment furnace and steel plate to be processed enter the furnace time, determine the warming temperature of heat-treatment furnace.
Heat-treatment furnace power-economizing method of the invention, can not change existing equipment, do not influence the quality of production and produce into
Under the premise of degree, according to steel plate real time position, prediction changes the feelings such as rule, heat treatment mode switching and preceding working procedure failure due to production
Under condition, the dead zone situation occurred in heat-treatment furnace is realized and is adjusted to the dynamic of furnace temperature to carry out heating and cooling control to dead zone,
The consumption for reducing gas medium, plays the role of the energy-saving and emission-reduction to work well.Heat-treatment furnace power-economizing method of the invention, by
In not changing existing equipment, therefore production cost can be reduced.
Detailed description of the invention
Fig. 1 is the sub- furnace Division schematic diagram of heat-treatment furnace；
Fig. 2 is the heating curve figure of heat-treatment furnace shown in Fig. 1；
Fig. 3 is heat-treatment furnace power-economizing method flow chart of the invention；
Fig. 4 is that heat-treatment furnace shown in Fig. 1 the schematic diagram of part dead zone state occurs；
Fig. 5 is that heat-treatment furnace shown in Fig. 1 the schematic diagram of full dead zone state occurs；
Fig. 6 is that flow chart is predicted in the dead zone in heat-treatment furnace power-economizing method of the invention；
Fig. 7 is that heat-treatment furnace shown in Fig. 1 the temperature lowering curve figure of part dead zone situation occurs；
Fig. 8 is that heat-treatment furnace shown in Fig. 1 the temperature lowering curve figure of full dead zone situation occurs；
Fig. 9 is the contrast schematic diagram of the temperature and the prior art after one embodiment of the invention cooling；
Figure 10 is the contrast schematic diagram of the temperature and the prior art after another embodiment of the present invention cooling；
Figure 11 is the contrast schematic diagram of the temperature and the prior art after another embodiment cooling of the invention.
Specific embodiment
In the following, being further described in conjunction with attached drawing to structure and working principle etc. of the invention.
As shown in Figure 1, according to heat treatment knowhow, heat-treatment furnace 10 can be divided into shove charge area a, energy conservation area b and
Tri- parts heat preservation zone c, due to quick charging technique demand, when steel plate 20 to be processed enters furnace, 20 length range of steel plate to be processed
The several furnace areas being inside related to are known as shove charge area a, due to will cause this when carrying out quick shove charge operation to steel plate 20 to be processed
The furnace temperature change dramatically of partial region, therefore Energy Saving Control should not be carried out to it again；And the smooth last part of furnace temperature belongs to
Heat preservation zone c, for ensuring the plate temperature consistency of steel plate 20 to be processed and the stability of material composition, for this part, generally
Also it should not intervene the furnace temperature in the region；In conclusion be suitable for carry out Energy Saving Control region be heat-treatment furnace middle section section
It can area b.Heat-treatment furnace 10 according to figure 1, corresponding heating curve are as shown in Figure 2.Wherein, abscissa is indicated by heat
The entrance of furnace 10 is managed to the position of export direction, ordinate indicates temperature, and curve A is that the conventional setting furnace temperature of former optimal setting is bent
Line represents the operating temperature of corresponding position in heat-treatment furnace 1, and curve B is plate temperature curve, represents steel plate 20 to be processed and is moved to heat
Steel billet temperature when 10 corresponding position for the treatment of furnace.
As shown in figure 3, including the following steps the present invention provides a kind of heat-treatment furnace power-economizing method：
Heat-treatment furnace 10 is evenly dividing along the length direction of heat-treatment furnace 10 as several areas Ge Zilu by first step.
There are many kinds of the methods for dividing the area Zi Lu, and the sub- furnace of fixed quantity can be divided according to the length of heat-treatment furnace 10
Area can also divide area Zi Lu etc. according to the length of steel plate 20 to be processed, heat-treatment furnace 10 is generally divided into 10- isometricly
12 areas Ge Zilu.Divide the area Zi Lu mode also there are many kinds of, can only along heat-treatment furnace 10 length direction divide the area Zi Lu,
It can also be divided up and down again after the division of the length direction of heat-treatment furnace 10, final each junior unit is the area Zi Lu.
In embodiments of the present invention, using along 10 length direction of heat-treatment furnace divide the area Zi Lu, and the area Zi Lu according to
The length for handling steel plate 20, is divided into 12 areas Ge Zilu, the respectively area Zi Lu 1, the area Zi Lu of the area Zi Lu 2 ... for heat-treatment furnace 10
12。
Second step, the quantity according to the steel plate to be processed 20 in heat-treatment furnace 10 and position determine that each area Ge Zilu is
No is dead zone.
In actual production, since the lifting of furnace temperature requires a process and a period of time, for different steel in the works
The furnace that continuously enters of the variation of kind and specification, artificial postponement steel plate 20 to be processed operates, and can also make to generate in heat-treatment furnace 10 empty
Area's phenomenon；Full dead zone operation is carried out in heat treatment process pattern switching to be necessary, and is adjusted for furnace temperature, is avoided different requirements
Steel plate to be processed 3 enter furnace temperature caused by furnace simultaneously and be difficult to meet process goal；The fluctuation of production, such as the event of preceding working procedure
Hinder, produce wait expect etc. to will also result in dead zone phenomenon.
In embodiments of the present invention, the dead zone situation of two kinds of forms is set.Wherein, a kind of for only to the region energy saving area b
The area Zi Lu carries out Energy Saving Control, chooses the multiple areas Zi Lu for being located at the energy saving area b of heat-treatment furnace 10, such as the area Zi Lu 4-9, and really
Whether these fixed multiple areas Zi Lu are dead zone, and dead zone at this time is referred to as part dead zone state, as shown in figure 4, specific side
Method is：More than any two except the Zi Lu area 7 adjacent with any steel plate 20 to be processed of energy conservation area b is located at continuous sons
In furnace area without steel plate 20 to be processed when, determine that the continuous area the Zi Lu 4-6 is respectively dead zone, for the dead zone carry out temperature control
System, to realize the energy conservation to heat-treatment furnace 10.Another kind works as whole to carry out Energy Saving Control to entire heat-treatment furnace 10 is whole
In the area Zi Lu 1-12 without steel plate to be processed when, heat-treatment furnace 10 is in full dead zone state, as shown in figure 5, to entire heat treatment
Furnace 10 carries out temperature control, to realize the energy conservation to heat-treatment furnace 10.
According to embodiments of the present invention, as shown in fig. 6, judging the method for dead zone situation can be specially：
Steel Plate Information in heat-treatment furnace 10 is determined according to 20 tracking information of steel plate to be processed；
If 20 quantity of steel plate to be processed is equal to the area 0, Quan Lu dead zone flag bit and is set as 1；
If 20 quantity of steel plate to be processed is not 0, according to 20 length of steel plate to be processed and location information, energy conservation area is determined
The quantity of steel plate to be processed 20 in b and position determine that whether there is or not dead zones other than former and later two adjacent regions of steel plate 20 to be processed；It will
Corresponding dead zone mark position is 1, is used for cooling control.
Third step, the maximum furnace area energy efficiency temperature for obtaining heat-treatment furnace 10 determine each according to maximum furnace area energy efficiency temperature
The cooling temperature of a dead zone.
In an embodiment of the invention, for the heat-treatment furnace 10 under the state of part dead zone, the drop of each dead zone is determined
The specific method of temperature includes：
1, the movement speed according to the heating slope, steel plate to be processed 20 of heat-treatment furnace 10 in heat-treatment furnace 10 determines
The maximum of dead zone can degree of cooling.
In embodiments of the present invention, it can be kept the temperature according to the heating slope of heat-treatment furnace 10 and the target of steel plate to be processed 3
Temperature determines movement speed of the steel plate 20 to be processed in heat-treatment furnace 10.Further, according to will reach dead zone wait locate
Position and its movement speed in heat-treatment furnace 10 for managing steel plate 20, between the time for determining the arrival of steel plate 20 to be processed dead zone
Every determining that the maximum of dead zone can degree of cooling according to the heating slope of the time interval and heat-treatment furnace 10.
Wherein, the calculation formula of steel plate movement speed is：
tActual achievement heating=tTheory heating*dSteel plate+tHeat preservation；
VSteel plate=(LFurnace–LSteel plate)*60/(1000*tActual achievement heating)；
In formula, tActual achievement heatingIt is steel plate actual achievement in stove heating time (s), tTheory heatingFor steel plate theoretical unit heating time (s),
dSteel plateFor steel plate thickness (mm), tHeat preservationFor steel plate target soaking time (s), VSteel plateThe movement speed (m/min) for being steel plate in furnace,
LFurnaceFor furnace superintendent (mm), LSteel plateFor steel plate length (mm).
When specifically, due to judging the dead zone in heat-treatment furnace 10, the corresponding serial number in dead zone has been had determined that, therefore,
The position of dead zone can be determined according to the serial number, and combines the speed of steel plate 20 to be processed, calculated steel plate 20 to be processed and reached
The remaining time of the dead zone, calculating maximum in conjunction with heating slope can degree of cooling.
Further, the calculation method of the remaining time of dead zone is：It is calculated by the movement speed of steel plate 20 to be processed empty
Area's remaining time predicts that steel plate 20 to be processed enters, leaves the time in a certain furnace area.When the subsequent nothing of target steel plate 20 to be processed enters
When furnace steel plate 20 to be processed, production plan or feeding event, the dead zone remaining time of calculating is negative value, is taken absolute value as dead zone
Remaining time.
Wherein, the calculation formula of the remaining time of dead zone is：tIt is remaining=DFurnace tail/VIt is practical, in formula, tIt is remainingFor dead zone remaining time
(s), DFurnace tailDistance for steel plate away from the tail portion Lu Qu, VIt is practicalFor steel plate actual speed.Maximum can the calculation formula of degree of cooling be：
TMaximum can drop=K*ABS (tIt is remaining), in formula, TMaximum can dropFor maximum can degree of cooling, K：Heat-treatment furnace heating gradient constant, in the present embodiment
In can take 100 DEG C/h of constant.
Wherein, heating slope is determined according to every area Ge Zilu radiant tube of heat-treatment furnace 10 distribution number and power,
This numerical value is referred to as the maximum heating ability of heat-treatment furnace 10, and unit is DEG C/h, and radiant tube maximum is generally taken to heat up ability
It 100 DEG C/h, can be adjusted according to the specific type of furnace, the different radiant tube models and quantity that the different type of furnaces use can change heat
The heating slope for the treatment of furnace 10.
2, the maximum furnace area energy efficiency temperature for obtaining heat-treatment furnace 10 takes maximum can be in degree of cooling and maximum furnace area energy efficiency temperature
Cooling temperature of the lesser value as dead zone.
In embodiments of the present invention, the empirical value produced according to actual heat treatment, maximum furnace area energy efficiency temperature can be made
For constant setting, value range is between 22~27 DEG C.Certainly, it according to different situations, can also be carried out according to the different type of furnaces
Adjustment.When maximum can degree of cooling be not more than maximum furnace area's energy efficiency temperature when, there is time enough to reach mesh in steel plate 20 to be processed
Furnace temperature is risen into back former setting furnace temperature before the area Biao Lu.It is then possible to according to the cooling temperature of the original temperature of each dead zone and dead zone
The temperature of real-time update dead zone.
In the present embodiment, when calculate maximum can degree of cooling after, by minimum value function by the maximum furnace in parameter list
Area's energy efficiency temperature and maximum can degree of cooling be compared, take cooling temperature of the lesser value as dead zone.
Wherein, minimum value function TIt can actually drop=min (TMaximum can drop, TThe energy conservation of furnace area), in formula, TIt can actually dropFor the cooling temperature of dead zone,
TThe energy conservation of furnace areaFor maximum furnace area energy efficiency temperature.
Finally, the cooling temperature of dead zone is passed into controller, subtracted on the basis of the conventional set temperature of former optimal setting
After going the cooling temperature of dead zone, furnace temperature setting is re-started.Its calculation formula is：TSetting=TIt is conventional-TIt can actually drop, in formula, TSettingAttach most importance to
The energy conservation setting furnace temperature of new settings, TIt is conventionalFurnace temperature is set to be conventional.
In embodiments of the present invention, when heat-treatment furnace 10 is in part dead zone state, due to having calculated that dead zone is surplus
Remaining time tIt is remaining, so, when energy saving with steel plate 20 to be processed apart from the dead zone more and more closer, TIt can actually dropCooling extent be smooth
It reduces, when steel plate 20 to be processed reaches the dead zone, furnace temperature has met the demand that steel plate 20 to be processed heats up, without additional
Heating.It is as shown in Figure 7 accordingly, for the heat treatment temperature curve after the dead zone cooling of heat-treatment furnace 10, wherein abscissa indicates
By the entrance of heat-treatment furnace 10 to the position of export direction, ordinate indicates temperature, and curve A is the conventional setting of former optimal setting
Oven temperature profile, A ' are the furnace temperature reset after energy conservation, and curve B is plate temperature curve, represents steel plate 20 to be processed and is moved to Re Chu
Manage steel billet temperature when 10 corresponding position of furnace.As can be seen that corresponding at the position of the dead zone part in Fig. 4 in Fig. 7, temperature has
It is decreased obviously.
In another embodiment, it for the heat-treatment furnace 10 under the state of part dead zone, is saved according to maximum furnace area
Energy temperature, cools down to whole furnace areas of heat-treatment furnace 10.
At this point it is possible to determine whether liter according to the history plan being heat-treated to steel plate to be processed and unfinished plan
Warm technique adjustment, if it is, terminating, if it is not, judging whether steel plate feeding to be handled, if not i.e. by feeding
Steel plate to be processed then motivates heat-treatment furnace integrally to carry out cooling control.It is each according to determining maximum furnace area energy efficiency temperature setting
The additional cooling value in furnace area, is sent to controller, is modified to furnace temperature setting curve, the original for reducing bed rearrangement heat-treatment furnace 10 is excellent
Change setting furnace temperature.Its calculation formula is：TSetting=TIt is conventional-TThe energy conservation of furnace area, in formula, TSettingFor the energy conservation setting furnace temperature of reset, TIt is conventionalFor
Conventional setting furnace temperature.It is as shown in Figure 8 accordingly, for the heat treatment temperature curve after the whole cooling of heat-treatment furnace 10, wherein horizontal seat
Mark indicates by the entrance of heat-treatment furnace 10 that the position of export direction, ordinate indicates temperature, and curve A is the furnace of former optimal setting
Warm curve, A ' set oven temperature profile for the energy conservation reset after energy conservation.As can be seen that under 10 bulk temperature of heat-treatment furnace has
Drop.
In an alternative embodiment of the invention, when obtaining processing task, i.e., when steel plate 20 to be handled is by feeding, also
Can according to the cooling temperature of heat-treatment furnace 10, steel plate heating curves, heat-treatment furnace 10 heating slope and steel plate to be processed 20
Enter the furnace time, determine the warming temperature of heat-treatment furnace 10.
Determine steel plate to be processed enters the furnace time, is mainly used for when heat-treatment furnace is in full dead zone state, can basis
To the monitoring of production restoration situation after cooling energy-saving, it is ensured that when starting production, furnace temperature can be restored in time to original target value.At this
May have in inventive embodiments, when due to full dead zone may also be without remaining steel plate processing plan, if without remaining steel
Plate processing plan, then operation needs to issue new steel plate processing meter on production management terminal first when resuming production
It draws；If so, then producing to remaining steel plate processing plan, related steel plate to be processed is hung feeding by directly commander's driving
Roller-way.According to normal production operation process, when no remaining steel plate processing plan, enter furnace time=plan acknowledging time
﹢ generation crane instruction ﹢ steel plate hangs the stokehold inlet roller way time ﹢ acknowledging time ﹢ and enters furnace operating time >=10 minute, generally with 10
Minute note.If it is receive slave computer transmission steel plate feeding event, then enter the furnace time be stokehold acknowledging time ﹢ enter furnace operation when
Between >=5 minutes, as shown in table 1.
The steel plate to be processed of table 1 enters furnace time contrast table
| Steel plate handles information when full dead zone | Plan confirmation | Enter the furnace time |
| There is remaining steel plate processing plan | It does not need | 5 minutes |
| There is no steel plate processing plan plan | It needs | 10 minutes |
According to it is above-mentioned enter the furnace time, the calculation formula of the remaining time of available dead zone is：tIt reaches=tEnter furnace+VShove charge/LEnter furnace+
VSteel plate/DEnter furnace, tIt reachesIt is reached at the time of forehearth area for steel plate, tEnter furnaceTo enter furnace time, VShove chargeFor the PLC steel plate to be processed uploaded
Shove charge speed, LEnter furnaceTo enter furnace section length, VSteel plateFor the movement speed of steel plate to be processed, DEnter furnaceFor when forehearth area from enter furnace offset from.
Energy is heated according to the remaining time of dead zone and current cooling temperature, steel plate heating curves, radiant tube by PLC
Power in advance heats up to heat-treatment furnace, to be modified to furnace temperature setting curve, it is ensured that furnace temperature satisfaction when steel plate enters furnace is wanted
It asks.
Specifically, temperature T can be risen by first calculating maximumMaximum can rise=K*tIt reaches, in formula, TMaximum can riseTemperature can be risen for maximum.Then root
According to formula THeating setting=min ((TTarget furnace temperature-TPractical furnace temperature), TMaximum can rise) calculate practical warming temperature, in formula, THeating settingFor practical heating
Temperature, TTarget furnace temperatureFor the furnace area target temperature calculated according to benchmark heating curve, TPractical furnace temperatureFor the current practical furnace temperature in the furnace area.
According to one embodiment of present invention, when heat-treatment furnace is in full dead zone state, using heat shown in the present invention
Treatment furnace power-economizing method is available as shown in Table 2 as a result, energy efficiency temperature curve is as shown in Figure 9, wherein abscissa indicate by
For the entrance of heat-treatment furnace to the position of export direction, ordinate indicates temperature, and curve A is the conventional setting furnace temperature of former optimal setting
Curve, A ' set oven temperature profile for the energy conservation reset after energy conservation.As can be seen that energy conservation setting furnace temperature is than conventional setting furnace temperature
Temperature is 24 DEG C low, plays the effect of good energy-saving cool-down.
The full dead zone state energy conservation furnace temperature contrast table of table 2
According to another embodiment of the invention, when heat-treatment furnace is in part dead zone state, and it is to be processed for monolithic
In the case that steel plate is located at heat-treatment furnace front, at this point, steel plate to be processed with a thickness of 10mm, length 3m, target heat preservation temperature
Degree is 930 DEG C, and steel plate marches at 26.1 meters and (marches to the area Zi Lu 4).Using heat-treatment furnace power-economizing method shown in the present invention
Available result as shown in table 3.
Only one piece of sheet steel sections dead zone state energy conservation furnace temperature contrast table in 3 furnace of table
For the area Zi Lu 6 shown in the table 3, calculating process is as follows：
With at a distance from the area target Zi Lu=the current steel plate position=42-26.1=15.9m of sub- furnace end of extent coordinate-；
Reach remaining time in each area Zi Lu=at a distance from the area target Zi Lu/steel plate speed * 60=15.9/5.5*60=
173.45sec；
Maximum can degree of cooling=(radiant tube maximum heat up ability/3600) * reach remaining time=(100/ in each area Zi Lu
3600) * 173.45=4.82 DEG C, wherein the Conversion of measurement unit for being used for hour and second divided by 3600；
Cool down temperature=min (maximum can degree of cooling, maximum furnace area energy efficiency temperature)=min (4.82,24)=4.82 DEG C；
Energy conservation setting furnace temperature=routine setting furnace temperature-cooling temperature=906.98-4.82=902.16 DEG C.
Described in table as above, steel plate to be processed is located at the area Zi Lu 4, and without steel plate to be processed, the area Zi Lu 1-2 starts entirely for front and back
Furnace area Energy Saving Control, the area the Zi Lu beginning 6-9 furnace area Energy Saving Control, energy efficiency temperature curve are as shown in Figure 10, wherein abscissa
It indicates by the entrance of heat-treatment furnace to the position of export direction, ordinate indicates temperature, and curve A is that the routine of former optimal setting is set
Determine oven temperature profile, A ' sets oven temperature profile for the energy conservation reset after energy conservation.As can be seen that the temperature of the area Zi Lu 5-10 has
It is reduced, plays the effect of good energy-saving cool-down.
According to another embodiment of the invention, when heat-treatment furnace is in part dead zone state, and it is to be processed for muti-piece
In the case that steel plate is located at heat-treatment furnace front, at this point, first block of steel plate to be processed with a thickness of 15mm, length 23m, target
Holding temperature is 930 DEG C, and steel plate marches at 5.5 meters and (marches to the area Zi Lu 1), second block of steel plate to be processed with a thickness of
10mm, length 3m, target holding temperature are 930 DEG C, and steel plate is located at heat preservation zone.Using the energy conservation of heat-treatment furnace shown in the present invention
The available result as shown in table 4 of method.
State energy conservation furnace temperature contrast table in plurality of steel plates part dead zone in 4 furnace of table
For the area Zi Lu 6 shown in the table 3, calculating process is as follows：
With at a distance from the area target Zi Lu=the current steel plate position=42-5.5=36.50m of sub- furnace end of extent coordinate-；
Reach remaining time in each area Zi Lu=at a distance from the area target Zi Lu/steel plate speed * 60=36.50/4.9*60
=446.94sec；
Maximum can degree of cooling=(radiant tube maximum heat up ability/3600) * reach remaining time=(100/ in each area Zi Lu
3600) * 446.94=12.41 DEG C, wherein the Conversion of measurement unit for being used for hour and second divided by 3600；
Cool down temperature=min (maximum can degree of cooling, maximum furnace area energy efficiency temperature)=min (12.41,24)=12.41 DEG C；
Energy conservation setting furnace temperature=routine setting furnace temperature-cooling temperature=906.98-12.41=894.57 DEG C.
Described in table as above, steel plate to be processed is located at the area Zi Lu 1 and the area Zi Lu 10, front and back without steel plate to be processed,
The area Zi Lu 3 belongs to the area Ru Lu, the area the Zi Lu beginning 4-8 furnace area Energy Saving Control, and energy efficiency temperature curve is as shown in figure 11, wherein
Abscissa indicates by the entrance of heat-treatment furnace that the position of export direction, ordinate indicates temperature, and curve A is former optimal setting
Routine setting oven temperature profile, A ' set oven temperature profile for the energy conservation reset after energy conservation.As can be seen that the temperature of the area Zi Lu 5-7
Degree decreases, and plays the effect of good energy-saving cool-down.
In conclusion heat-treatment furnace power-economizing method of the invention, can predict in heat-treatment furnace according to steel plate real time position
Dead zone situation, the dynamic of furnace temperature is adjusted to realize, the consumption of gas medium is reduced, plays a role in energy saving.
More than, schematic description only of the invention, it will be recognized by those skilled in the art that without departing from work of the invention
On the basis of making principle, a variety of improvement can be made to the present invention, this is all belonged to the scope of protection of the present invention.
Claims (9)
1. a kind of heat-treatment furnace power-economizing method, which is characterized in that include the following steps：
S1, the heat-treatment furnace is evenly dividing as several areas Ge Zilu along the length direction of heat-treatment furnace；
S2, the quantity according to the steel plate to be processed in the heat-treatment furnace and position determine whether each area Zi Lu is empty
Area；
S3, the maximum furnace area energy efficiency temperature for obtaining the heat-treatment furnace determine each institute according to maximum furnace area energy efficiency temperature
State the cooling temperature of dead zone.
2. heat-treatment furnace power-economizing method as described in claim 1, which is characterized in that the heat-treatment furnace includes shove charge area, section
The multiple areas Zi Lu for being located at the energy saving area of the heat-treatment furnace are chosen, and determine institute in the step S2 in energy area and heat preservation zone
State whether multiple areas Zi Lu are dead zone.
3. heat-treatment furnace power-economizing method as claimed in claim 2, which is characterized in that in the step S2, when be located at it is described
It is more than any two except the adjacent area Zi Lu of any steel plate to be processed in energy saving area in the continuous area Zi Lu without it is described to
When handling steel plate, determine that the continuous area Zi Lu is respectively dead zone.
4. heat-treatment furnace power-economizing method as claimed in claim 2, which is characterized in that determine the cooling temperature of each dead zone
Specific method include：
S3.1, the movement speed according to the heating slope, the steel plate to be processed of the heat-treatment furnace in the heat-treatment furnace,
Determine that the maximum of the dead zone can degree of cooling；
S3.2, the maximum furnace area energy efficiency temperature for obtaining the heat-treatment furnace take the maximum can degree of cooling and the maximum furnace area
Cooling temperature of the lesser value as the dead zone in energy efficiency temperature.
5. heat-treatment furnace power-economizing method as claimed in claim 4, which is characterized in that according to the heating slope of the heat-treatment furnace
With the target holding temperature of the steel plate to be processed, movement speed of the steel plate to be processed in the heat-treatment furnace is determined.
6. heat-treatment furnace power-economizing method as claimed in claim 5, which is characterized in that according to will reach the dead zone wait locate
Manage steel plate position and its movement speed in the heat-treatment furnace, determine the steel plate to be processed reach the dead zone when
Between be spaced, according to the heating slope of the time interval and the heat-treatment furnace, determine that the maximum of the dead zone can degree of cooling.
7. heat-treatment furnace power-economizing method as claimed in claim 2, which is characterized in that further include, according to the original of each dead zone
The temperature of dead zone described in temperature and the cooling temperature real-time update of the dead zone.
8. heat-treatment furnace power-economizing method as described in claim 1, which is characterized in that when nothing is described wait locate in whole areas Zi Lu
When managing steel plate, the heat-treatment furnace is in full dead zone state, according to maximum furnace area energy efficiency temperature, to the heat-treatment furnace
Whole furnace areas cool down.
9. heat-treatment furnace power-economizing method as claimed in claim 8, which is characterized in that further include, when obtaining processing task, root
According to the cooling temperature of the heat-treatment furnace, steel plate heating curves, the heat-treatment furnace heating slope and the steel plate to be processed
Enter the furnace time, determine the warming temperature of the heat-treatment furnace.
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