CN106011401A - Control method and system for smoke exhausting draught fan of annealing furnace - Google Patents
Control method and system for smoke exhausting draught fan of annealing furnace Download PDFInfo
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- CN106011401A CN106011401A CN201610451076.5A CN201610451076A CN106011401A CN 106011401 A CN106011401 A CN 106011401A CN 201610451076 A CN201610451076 A CN 201610451076A CN 106011401 A CN106011401 A CN 106011401A
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- annealing furnace
- value
- smoke discharging
- blower fan
- fan
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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
- C21D1/00—General methods or devices for heat treatment, e.g. annealing, hardening, quenching or tempering
- C21D1/26—Methods of annealing
-
- 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
-
- 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
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
- G05D16/2006—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means
- G05D16/2013—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means
- G05D16/202—Control of fluid pressure characterised by the use of electric means with direct action of electric energy on controlling means using throttling means as controlling means actuated by an electric motor
Abstract
The invention discloses a control method and system for a smoke exhausting draught fan of an annealing furnace. Waste gas pressure of waste gas generated by a continuous annealing furnace production line is monitored in the running process of the smoke exhausting draught fan of the annealing furnace; when the waste gas pressure is monitored to be larger than a preset pressure upper limit, a selection block is used for selecting a responding first draught fan power set value to control the smoke exhausting draught fan of the annealing furnace; and when the waste gas pressure is monitored to be smaller than a preset pressure lower limit, the selection block is used for selecting a responding second draught fan power set value to control the smoke exhausting draught fan of the annealing furnace, wherein the first draught fan power set value is larger than the second draught fan power set value. By means of the control method and system, the technical problem that in the running process of an existing smoke exhausting draught fan of an annealing furnace, triangular waveform oscillations happen to the waste gas pressure value while regular sinusoidal waveform oscillations happen to the power of the draught fan is solved effectively, the service life of the equipment is prolonged, and damage risks are lowered.
Description
Technical field
The present invention relates to production technical field of annealing, particularly relate to annealing furnace smoke discharging blower control method and control
System.
Background technology
When continuous annealing furnace production line produces, the use of annealing furnace waste gas discharge blower fan is widely
, but owing to producing line production just kind and the multiformity of specification and polytropy, annealing furnace heating-up temperature is often sent out
Changing, produced exhaust gas pressure produces change therewith.Waste gas discharge blower fan control time frequently with PID
(Proportion Integration Differentiation.Proportional-integral-differential) control technology, make pressure steady
In the range of being scheduled on one.The fluctuation of exhaust gas pressure value has the biggest shadow not only for the heating system of annealing furnace
Ring, the stability of frequency conversion fan is caused large effect simultaneously.
Annealing furnace waste gas discharge blower fan is under PID controller control, by annealing furnace waste gas discharge blower fan
Output regulates exhaust gas pressure and exhaust gas flow in continuous annealing furnace, and the present inventor is answering
Finding when producing with existing continuous annealing furnace production line, there is regular sine wave in blower fan output
Shape concussion while exhaust gas pressure value also occur that triangular waveform shake, inventor through research be the discovery that because of
Exhaust gas pressure exceedes the power meeting transient rise setting higher limit rear fan, and the transient rise of power can cause giving up
Atmospheric pressure dramatic decrease therewith, final exhaust gas pressure can exceed lower limit, and therefore blower fan output has
The sinusoidal wave form concussion of rule, exhaust gas pressure value also occurs that triangular waveform is shaken simultaneously, and long term annealing stove gives up
Blower fan and the motor of gas discharge blower fan are damaged in various degree, and are unfavorable for production in continuous annealing furnace.
Summary of the invention
The embodiment of the present invention, by providing a kind of annealing furnace smoke discharging blower control method and control system, solves
There is the concussion of regular sinusoidal wave form in existing annealing furnace smoke discharging blower fan blower fan output in running
While exhaust gas pressure value the technical problem that triangular waveform is shaken also occurs.
First aspect, embodiments provides a kind of annealing furnace smoke discharging blower control method, is applied to move back
The control system of stove smoke exhaust fan, described annealing furnace smoke discharging blower control method comprises the steps:
Continuous annealing furnace production line is monitored waste gas produced during described annealing furnace smoke discharging fan operation
Exhaust gas pressure；
When monitoring described exhaust gas pressure more than preset pressure higher limit, use and select the of block Response to selection
Annealing furnace smoke discharging blower fan described in one power of fan set value calculation；
When monitoring described exhaust gas pressure less than preset pressure lower limit, use described selection block Response to selection
The second power of fan set value calculation described in annealing furnace smoke discharging blower fan, wherein, described first power of fan sets
Definite value is more than described second power of fan setting value.
Preferably, during described annealing furnace smoke discharging fan operation, monitor continuous annealing furnace production line to be produced
After the exhaust gas pressure of waste gas, described annealing furnace smoke discharging blower control method also includes:
Monitor described exhaust gas pressure in pre-set pressure range time, from controller read preset slope normal
Value, wherein, described pre-set pressure range is by described preset pressure higher limit and described preset pressure lower limit structure
The pressure limit closed interval become；
Based on described default slope constant value, the blower fan output of annealing furnace smoke discharging blower fan is adjusted.
Preferably, when monitoring described exhaust gas pressure more than preset pressure higher limit, described annealing furnace smoke discharging
Blower control method also includes:
Blower fan output is adjusted by the first ramp value using described selection block Response to selection, and described
One ramp value is more than described default slope constant value；
When the most described exhaust gas pressure reaches target pressure value, control is proceeded to normal PID by RS triggering block
In control.
Preferably, when monitoring described exhaust gas pressure less than preset pressure lower limit, described annealing furnace smoke discharging
Blower control method also includes:
Blower fan output is adjusted by the second ramp value using described selection block Response to selection, wherein,
Described second ramp value is more than described default slope constant value；
When the most described exhaust gas pressure reaches target pressure value, control is proceeded to normal PID by RS triggering block
In control.
Preferably, during described annealing furnace smoke discharging fan operation, described annealing furnace smoke discharging air-blower control side
Method also includes:
Obtain the blower fan output power measurement value of described annealing furnace smoke discharging blower fan；
Relatively described blower fan output power measurement value and current power of fan setting value a, it is thus achieved that comparative result；
Determine that the first power of fan value of feedback mated with described comparative result is to described controller so that institute
State controller and control described annealing furnace smoke discharging blower fan according to described power of fan value of feedback.
Second aspect, embodiments provides the control system of a kind of annealing furnace smoke discharging blower fan, including:
Monitoring means, for monitoring continuous annealing furnace production line during described annealing furnace smoke discharging fan operation
Waste gas produced exhaust gas pressure；
First control unit, for when monitoring described exhaust gas pressure more than preset pressure higher limit, uses
Select annealing furnace smoke discharging blower fan described in the first power of fan set value calculation of block Response to selection；
Second control unit, for when monitoring described exhaust gas pressure less than preset pressure lower limit, uses
Annealing furnace smoke discharging blower fan described in second power of fan set value calculation of described selection block Response to selection, wherein,
Described first power of fan setting value is more than described second power of fan setting value.
Preferably, described control system also includes:
Read unit, for monitor described exhaust gas pressure in pre-set pressure range time, from controller
Reading and preset slope constant value, wherein, described pre-set pressure range is pre-with described by described preset pressure higher limit
If the pressure limit closed interval that low pressure limit value is constituted；
First regulation unit, for exporting the blower fan of annealing furnace smoke discharging blower fan based on described default slope constant value
Power is adjusted.
Preferably, described control system also includes:
Second regulation unit, for using the first ramp value of described selection block Response to selection to blower fan output work
Rate is adjusted, and described first ramp value is more than described default slope constant value；
First proceeds to unit, and when the most described exhaust gas pressure reaches target pressure value, RS triggers
Control is proceeded in normal PID control by block.
Preferably, described control system also includes:
3rd regulation unit, for using the second ramp value of described selection block Response to selection to blower fan output work
Rate is adjusted, and wherein, described second ramp value is more than described default slope constant value；
Second proceeds to unit, and when the most described exhaust gas pressure reaches target pressure value, RS triggers
Control is proceeded in normal PID control by block.
Preferably, described control system also includes:
Acquiring unit, for obtaining the blower fan output power measurement value of described annealing furnace smoke discharging blower fan；
Comparing unit, relatively described blower fan output power measurement value and current power of fan setting value, it is thus achieved that one
Comparative result；
Determine unit, for determining that the first power of fan value of feedback mated with described comparative result is to described
Controller so that described controller controls described annealing furnace smoke discharging blower fan according to described power of fan value of feedback.
The one or more technical schemes provided in the embodiment of the present invention, at least have the following technical effect that or excellent
Point:
The embodiment of the present invention have employed monitors continuous annealing furnace production during annealing furnace smoke discharging fan operation
The exhaust gas pressure that line is waste gas produced, owing to using when monitoring exhaust gas pressure more than preset pressure higher limit
Select the first power of fan set value calculation annealing furnace smoke discharging blower fan of block Response to selection so that exhaust gas pressure surpasses
Normal PID can be departed from during the upper limit control, and use the first power of fan more meeting residing high waste gas pressure to set
Value controls annealing furnace smoke discharging blower fan.Owing to using choosing when monitoring exhaust gas pressure less than preset pressure lower limit
Select the second power of fan set value calculation annealing furnace smoke discharging blower fan of block Response to selection so that beyond presetting pressure
Also can depart from normal PID during power lower limit to control, use the second power of fan more meeting residing low waste gas pressure to set
Setting control annealing furnace smoke discharging blower fan, and owing to being used the first power of fan setting value more than the second blower fan
Set value of the power, therefore exhaust gas pressure can be quickly reduced to goal pressure when beyond preset pressure higher limit
Value, is stably increased to target pressure value when beyond preset pressure lower limit, cuts off in conjunction with above-mentioned three aspects
Blower fan output produces sinusoidal wave form concussion and exhaust gas pressure value produces the mechanism that triangular waveform is shaken, therefore
Efficiently solve existing annealing furnace smoke discharging blower fan power of fan in running and have the sine wave of rule
While shape concussion, also there is the technical problem that triangular waveform is shaken in exhaust gas pressure value, and then the most anti-
Only in continuous annealing furnace, there are great changes in exhaust gas pressure, produces, the opposing party in being therefore more beneficial for annealing furnace
Face makes annealing furnace smoke discharging blower fan system more stable, it is thus possible to avoid sinusoidal wave form to shake to annealing furnace smoke discharging wind
Overheated, the overload situations that machine system is brought, extends annealing furnace smoke discharging blower fan system service life, reduces
Damaged risk.
Further, when exceeding preset pressure upper limit value and lower limit value due to exhaust gas pressure, when using more than normal regulating
Default slope constant value blower fan output is controlled, more meet exhaust gas pressure at that time, make by control value
(i.e. exhaust gas pressure) can be more beneficial for preventing fire grate of annealing rapidly close to target pressure value and reach stable
Cigarette blower fan produces concussion.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to enforcement
In example or description of the prior art, the required accompanying drawing used is briefly described, it should be apparent that, describe below
In accompanying drawing be only embodiments of the invention, for those of ordinary skill in the art, do not paying wound
On the premise of the property made work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
Fig. 1 is the schematic flow sheet of annealing furnace smoke discharging blower control method in the embodiment of the present invention；
Fig. 2 is the structure connection diagram of the control system of annealing furnace smoke discharging blower fan in the embodiment of the present invention.
Detailed description of the invention
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that
Described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art obtained under not making creative work premise all its
His embodiment, broadly falls into the scope of protection of the invention.
A kind of annealing furnace smoke discharging blower control method that the embodiment of the present invention provides, is applied to annealing furnace smoke discharging
The control system of blower fan, this control system includes a controller, and in one embodiment, controller is PID control
Device processed, annealing furnace smoke discharging blower fan specifically includes frequency conversion motor, controls to move back by the PID controller of control system
The power of stove smoke exhaust fan.
With reference to shown in Fig. 1, the annealing furnace smoke discharging blower control method that the embodiment of the present invention provides includes walking as follows
Rapid:
S101, during annealing furnace smoke discharging fan operation monitor continuous annealing furnace production line waste gas produced
Exhaust gas pressure.
In specific implementation process, by being arranged on the pressure transmitter on continuous annealing furnace production line (such as
Rosemount transmitter), continue to monitor the exhaust gas pressure that continuous annealing furnace production line is waste gas produced.
Performing after S101, according to different monitoring result correspondences perform following steps S102,3103,
One or two step in S10, S105.
Specifically, the preset pressure of a normal regulating annealing furnace smoke discharging blower fan is preset in the controller
Scope, exhaust gas pressure carries out normal PID control in pre-set pressure range.This default exhaust gas pressure scope has
The pressure limit closed interval that body is made up of preset pressure higher limit and preset pressure lower limit.Such as, pin
To vertical type continuous annealing furnace production line, preset exhaust gas pressure scope and could be arranged to [-1500 ,-900], at tool
In body implementation process, on other continuous annealing furnaces produce line, can with default exhaust gas pressure scope [-1500,
-900] identical, or the upper and lower limit according to practical condition change pressure limit closed interval, but all belong to
In the scope that this invention is intended to protection.
Concrete, stating during annealing furnace smoke discharging fan operation monitoring result the most in the same time is following three kinds
In one: monitoring result one: the exhaust gas pressure of annealing furnace smoke discharging blower fan is in the range of default exhaust gas pressure；
Monitoring result two: the exhaust gas pressure of annealing furnace smoke discharging blower fan is more than in the preset pressure presetting exhaust gas pressure scope
Limit value；Monitoring result three: the exhaust gas pressure of annealing furnace smoke discharging blower fan is less than presetting presetting of exhaust gas pressure scope
Low pressure limit value.
In specific implementation process, preset one in the controller and preset slope constant value as normal regulating annealing
Acclivity value during stove smoke exhaust fan and decline ramp value.
Then for monitoring result one, after S101, also comprise the steps S102: monitoring waste gas pressure
When power is in pre-set pressure range, reads from controller and preset slope constant value；Based on default slope constant value pair
The blower fan output of annealing furnace smoke discharging blower fan is adjusted.
Preset the exhaust gas pressure in the range of exhaust gas pressure to vary less, by original default slope constant value with regard to energy
The exhaust gas pressure that enough normal regulating continuous annealing furnace production line is waste gas produced is in a scope is stable.
For monitoring result two, then after S101, also comprise the steps S103: monitoring waste gas pressure
When power is more than preset pressure higher limit, the first power of fan set value calculation selecting block Response to selection is used to move back
Stove smoke exhaust fan.Wherein, when controller is specially PID controller, the first power of fan setting value tool
Body is the set value of the power of the negative feedback closed loop control constantly correction through PID controller, thus more meets useless
Atmospheric pressure surpasses the actual demand of the upper limit.
For in the further technical scheme of monitoring result two, also comprise the steps after S101
S104: use the first ramp value selecting block Response to selection that blower fan output is adjusted, the first slope
Value is more than presetting slope constant value.When first ramp value is to regulate annealing furnace smoke discharging blower fan for monitoring result two
Acclivity value and decline ramp value, it may be assumed that when monitoring exhaust gas pressure more than preset pressure higher limit,
Blower fan output is adjusted rising used, to decline ramp value identical.Owing to the first ramp value is more than
Preset slope constant value, can quickly reduce exhaust gas pressure to presetting exhaust gas pressure scope by S103.
For monitoring result three, then after S101, also comprise the steps S105: monitoring waste gas pressure
Power is moved back less than the second power of fan set value calculation using selection block Response to selection during preset pressure lower limit
Stove smoke exhaust fan.Wherein, the first power of fan setting value is more than the second power of fan setting value.Can be
The reduction to pressure is weakened when exhaust gas pressure is less.Wherein, when controller is specially PID controller, the
The negative feedback closed loop that two power of fan setting values are specially through PID controller controls the continuous power revised
Setting value.Thus more meet exhaust gas pressure and surpass the actual demand of lower limit.
For the further technical scheme of monitoring result three, also comprise the steps S106: monitoring waste gas
When pressure is less than preset pressure lower limit, use the second ramp value selecting block Response to selection to blower fan output work
Rate is adjusted, and the second ramp value is more than presetting slope constant value.Second ramp value is for adjust for monitoring result three
Acclivity value during joint annealing furnace smoke discharging blower fan and decline ramp value, it may be assumed that be less than monitoring exhaust gas pressure
During preset pressure lower limit, blower fan output is adjusted rising used, to decline ramp value identical.
Owing to the second ramp value is more than presetting slope constant value, can quickly raise exhaust gas pressure to presetting by S106
Exhaust gas pressure scope.
In specific implementation process, the second ramp value is different numerical value from the first ramp value, due to beyond presetting
Situation residing for pressure upper limit value and lower limit value is different, and the power of fan setting value done is different, and ramp value also has not
With, thus reach the regulation and control of fast and stable.
First ramp value for a kind of default slope constant value, the illustration of second ramp value are given below
Say: for the annealing furnace smoke discharging blower fan that default slope constant value is 0.6～0.8, then the first ramp value is
0.65～0.85, the second ramp value is 0.62～0.82.The most in one embodiment: presetting slope constant value is 0.725
Time, then the first ramp value is set to 0.75, and the second ramp value is set to 0.7；The most such as in another embodiment
In: when default slope constant value is 0.8, then the first ramp value is set to 0.85, and the second ramp value is set to 0.75.
Concrete, for the first power of fan setting value more than the second power of fan setting value, for example:
At cold rolling 2230 continuous annealing furnace production lines, the first power of fan setting value is the 95% of rated power, the
Two power of fan setting values are the 10% of rated power.
Reaching target pressure value at exhaust gas pressure after above-mentioned regulation, control is just proceeded to by RS triggering block
During normal PID controls, then continue executing with abovementioned steps S102: read from controller and preset slope constant value；
Based on default slope constant value, blower fan output is adjusted.During until monitor monitoring result two next time
Proceed to again perform step S103～S104.Proceed to again when monitoring monitoring result three perform step S105～S106,
Circulate during described annealing furnace smoke discharging fan operation with this, make blower fan system persistently add stable.
Concrete, target pressure value is to preset the arbitrary force value in exhaust gas pressure scope.Specifically, may be used
Think-900Pa ,-800Pa etc..
Further, it is the embodiment of PID controller for the controller included by control system, due to
PID controller, for realizing pid algorithm, is necessary for having closed loop control, annealing furnace smoke discharging blower fan on hardware
Frequency conversion motor utilize PID controller composition with the blower fan output of annealing furnace smoke discharging blower fan blower fan for control
The closed loop control of object processed.
Obtain the blower fan output power measurement value of annealing furnace smoke discharging blower fan；Relatively blower fan output power measurement value with
Current power of fan setting value a, it is thus achieved that comparative result；Determine the first blower fan merit mated with comparative result
Rate value of feedback is to PID controller so that controller controls described annealing furnace smoke discharging according to power of fan value of feedback
Blower fan.Have modified the difference between setpoint power output and real output by power of fan value of feedback, make
Output deviation reduces, so that exhaust gas pressure is closer to target pressure value.
Specifically, the effect of annealing furnace smoke discharging blower fan is by waste gas produced for continuous annealing furnace production line discharge
Going, exhaust effect can be carried out by adjusting blower fan output.Blower fan output power measurement value and current wind
The difference of acc power setting value is after PID controller, and PID controller sends the first wind mated with difference
Acc power value of feedback, to annealing furnace smoke discharging blower fan, regulates blower fan output, finally to regulate exhaust gas pressure.
In specific implementation process, by arranging rational PI parameter, it is possible to obtain satisfied closed loop control.
Concrete, PI parameter includes: proportional gain, the time of integration, sampling period, deviation limit.Such as, partially
The difference limit could be arranged to 10%, and blower fan output power measurement value is big with the difference of current power of fan setting value
In 10% time, by difference through PID controller, PID controller sends the first blower fan merit mated with difference
Rate value of feedback, to annealing furnace smoke discharging blower fan, regulates blower fan output.
Based on same inventive concept, the embodiment of the present invention additionally provides the control system of a kind of annealing furnace smoke discharging blower fan
System.With reference to shown in Fig. 2, this control system includes following functional unit:
Monitoring means 201, for monitoring continuous annealing furnace production line during annealing furnace smoke discharging fan operation
Waste gas produced exhaust gas pressure；
First control unit 202, for when monitoring exhaust gas pressure more than preset pressure higher limit, uses
Select the first power of fan set value calculation annealing furnace smoke discharging blower fan of block Response to selection；
Second control unit 203, for when monitoring exhaust gas pressure less than preset pressure lower limit, uses
Select the second power of fan set value calculation annealing furnace smoke discharging blower fan of block Response to selection, wherein, the first blower fan
Set value of the power is more than the second power of fan setting value.
Preferably, control system also includes:
Read unit 204, for monitor exhaust gas pressure in pre-set pressure range time, from controller
Reading and preset slope constant value, wherein, pre-set pressure range is by preset pressure higher limit and preset pressure lower limit
The pressure limit closed interval constituted；
First regulation unit 205, for exporting the blower fan of annealing furnace smoke discharging blower fan based on default slope constant value
Power is adjusted.
Preferably, control system also includes:
Second regulation unit 206, for using the first ramp value selecting block Response to selection to blower fan output work
Rate is adjusted, and described first ramp value is more than described default slope constant value；
First proceeds to unit 207, when exhaust gas pressure reaches target pressure value after adjustment, and RS triggering block
Control is proceeded in normal PID control.
Preferably, control system also includes:
3rd regulation unit 208, for using the second ramp value selecting block Response to selection to blower fan output work
Rate is adjusted, and described first ramp value is more than described default slope constant value；
Second proceeds to unit 209, when exhaust gas pressure reaches target pressure value after adjustment, and RS triggering block
Control is proceeded in normal PID control.
Preferably, control system also includes:
Acquiring unit, for obtaining the blower fan output power measurement value of annealing furnace smoke discharging blower fan；
Comparing unit, compares blower fan output power measurement value and current power of fan setting value, it is thus achieved that one compares
Result；
Determine unit, for determine the first power of fan value of feedback mated with comparative result to controller,
Controller is made to control annealing furnace smoke discharging blower fan according to power of fan value of feedback.
The one or more technical schemes provided by the aforementioned embodiment of the present invention, the present invention at least achieve as
Lower technique effect or advantage:
The one or more technical schemes provided in the embodiment of the present invention, at least have the following technical effect that or excellent
Point:
The embodiment of the present invention have employed monitors continuous annealing furnace production during annealing furnace smoke discharging fan operation
The exhaust gas pressure that line is waste gas produced, owing to using when monitoring exhaust gas pressure more than preset pressure higher limit
Select the first power of fan set value calculation annealing furnace smoke discharging blower fan of block Response to selection so that exhaust gas pressure surpasses
Normal PID can be departed from during the upper limit control, and use the first power of fan more meeting residing high waste gas pressure to set
Value controls annealing furnace smoke discharging blower fan.Owing to using choosing when monitoring exhaust gas pressure less than preset pressure lower limit
Select the second power of fan set value calculation annealing furnace smoke discharging blower fan of block Response to selection so that beyond presetting pressure
Also can depart from normal PID during power lower limit to control, use the second power of fan more meeting residing low waste gas pressure to set
Setting control annealing furnace smoke discharging blower fan, and owing to being used the first power of fan setting value more than the second blower fan
Set value of the power, therefore exhaust gas pressure can be quickly reduced to goal pressure when beyond preset pressure higher limit
Value, is stably increased to target pressure value when beyond preset pressure lower limit, cuts off in conjunction with above-mentioned three aspects
Blower fan output produces sinusoidal wave form concussion and exhaust gas pressure value produces the mechanism that triangular waveform is shaken, therefore
Efficiently solve existing annealing furnace smoke discharging blower fan power of fan in running and have the sine wave of rule
While shape concussion, also there is the technical problem that triangular waveform is shaken in exhaust gas pressure value, and then the most anti-
Only in continuous annealing furnace, there are great changes in exhaust gas pressure, produces, the opposing party in being therefore more beneficial for annealing furnace
Face makes annealing furnace smoke discharging blower fan system more stable, it is thus possible to avoid sinusoidal wave form to shake to annealing furnace smoke discharging wind
Overheated, the overload situations that machine system is brought, extends annealing furnace smoke discharging blower fan system service life, reduces
Damaged risk.
Further, when exceeding preset pressure upper limit value and lower limit value due to exhaust gas pressure, when using more than normal regulating
Default slope constant value blower fan output is controlled, more meet exhaust gas pressure at that time, make by control value
(i.e. exhaust gas pressure) can be more beneficial for preventing fire grate of annealing rapidly close to target pressure value and reach stable
Cigarette blower fan produces concussion.
The control system of the annealing furnace smoke discharging blower fan of the present embodiment and preceding method embodiment are same invention structure
Two aspects under Siing, those skilled in the art can know according to the details that is embodied as in embodiment of the method
The detailed description of the invention of control system in the present embodiment, succinct for description, repeat no more herein.
Those skilled in the art are it should be appreciated that embodiments of the invention can be provided as method, system or meter
Calculation machine program product.Therefore, the present invention can use complete hardware embodiment, complete software implementation or knot
The form of the embodiment in terms of conjunction software and hardware.And, the present invention can use and wherein wrap one or more
Computer-usable storage medium containing computer usable program code (include but not limited to disk memory,
CD-ROM, optical memory etc.) form of the upper computer program implemented.
The present invention is with reference to method, equipment (system) and computer program product according to embodiments of the present invention
The flow chart of product and/or block diagram describe.It should be understood that can by computer program instructions flowchart and
/ or block diagram in each flow process and/or flow process in square frame and flow chart and/or block diagram and/
Or the combination of square frame.These computer program instructions can be provided to general purpose computer, special-purpose computer, embedding
The processor of formula datatron or other programmable data processing device is to produce a machine so that by calculating
The instruction that the processor of machine or other programmable data processing device performs produces for realizing at flow chart one
The device of the function specified in individual flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions may be alternatively stored in and computer or the process of other programmable datas can be guided to set
In the standby computer-readable memory worked in a specific way so that be stored in this computer-readable memory
Instruction produce and include the manufacture of command device, this command device realizes in one flow process or multiple of flow chart
The function specified in flow process and/or one square frame of block diagram or multiple square frame.
These computer program instructions also can be loaded in computer or other programmable data processing device, makes
Sequence of operations step must be performed to produce computer implemented place on computer or other programmable devices
Reason, thus the instruction performed on computer or other programmable devices provides for realizing flow chart one
The step of the function specified in flow process or multiple flow process and/or one square frame of block diagram or multiple square frame.
Although preferred embodiments of the present invention have been described, but those skilled in the art once know base
This creativeness concept, then can make other change and amendment to these embodiments.So, appended right is wanted
Ask and be intended to be construed to include preferred embodiment and fall into all changes and the amendment of the scope of the invention.
Obviously, those skilled in the art can carry out various change and modification without deviating from this to the present invention
Bright spirit and scope.So, if the present invention these amendment and modification belong to the claims in the present invention and
Within the scope of its equivalent technologies, then the present invention is also intended to comprise these change and modification.
Claims (10)
1. an annealing furnace smoke discharging blower control method, is applied to the control system of annealing furnace smoke discharging blower fan,
It is characterized in that, described annealing furnace smoke discharging blower control method comprises the steps:
Continuous annealing furnace production line is monitored waste gas produced during described annealing furnace smoke discharging fan operation
Exhaust gas pressure；
When monitoring described exhaust gas pressure more than preset pressure higher limit, use and select the of block Response to selection
Annealing furnace smoke discharging blower fan described in one power of fan set value calculation；
When monitoring described exhaust gas pressure less than preset pressure lower limit, use described selection block Response to selection
The second power of fan set value calculation described in annealing furnace smoke discharging blower fan, wherein, described first power of fan sets
Definite value is more than described second power of fan setting value.
2. stove smoke exhaust fan control method as claimed in claim 1, it is characterised in that move back described
After stove smoke exhaust fan running monitors the exhaust gas pressure that continuous annealing furnace production line is waste gas produced,
Described annealing furnace smoke discharging blower control method also includes:
Monitor described exhaust gas pressure in pre-set pressure range time, from controller read preset slope normal
Value, wherein, described pre-set pressure range is by described preset pressure higher limit and described preset pressure lower limit structure
The pressure limit closed interval become；
Based on described default slope constant value, the blower fan output of described annealing furnace smoke discharging blower fan is adjusted.
3. annealing furnace smoke discharging blower control method as claimed in claim 2, it is characterised in that in monitoring
To described exhaust gas pressure more than preset pressure higher limit time, described annealing furnace smoke discharging blower control method also wraps
Include:
Blower fan output is adjusted by the first ramp value using described selection block Response to selection, and described
One ramp value is more than described default slope constant value；
When the most described exhaust gas pressure reaches target pressure value, control is proceeded to normal PID by RS triggering block
In control.
4. annealing furnace smoke discharging blower control method as claimed in claim 2, it is characterised in that in monitoring
To described exhaust gas pressure less than preset pressure lower limit time, described annealing furnace smoke discharging blower control method also wraps
Include:
Blower fan output is adjusted by the second ramp value using described selection block Response to selection, wherein,
Described second ramp value is more than described default slope constant value；
When the most described exhaust gas pressure reaches target pressure value, control is proceeded to normal PID by RS triggering block
In control.
5. annealing furnace smoke discharging blower control method as claimed in claim 2, it is characterised in that described
During annealing furnace smoke discharging fan operation, described annealing furnace smoke discharging blower control method also includes:
Obtain the blower fan output power measurement value of described annealing furnace smoke discharging blower fan；
Relatively described blower fan output power measurement value and current power of fan setting value a, it is thus achieved that comparative result；
Determine that the first power of fan value of feedback mated with described comparative result is to described controller so that institute
State controller and control described annealing furnace smoke discharging blower fan according to described power of fan value of feedback.
6. the control system of an annealing furnace smoke discharging blower fan, it is characterised in that including:
Monitoring means, for monitoring continuous annealing furnace production line during described annealing furnace smoke discharging fan operation
Waste gas produced exhaust gas pressure；
First control unit, for when monitoring described exhaust gas pressure more than preset pressure higher limit, uses
Select annealing furnace smoke discharging blower fan described in the first power of fan set value calculation of block Response to selection；
Second control unit, for when monitoring described exhaust gas pressure less than preset pressure lower limit, uses
Annealing furnace smoke discharging blower fan described in second power of fan set value calculation of described selection block Response to selection, wherein,
Described first power of fan setting value is more than described second power of fan setting value.
7. the control system of annealing furnace smoke discharging blower fan as claimed in claim 6, it is characterised in that described
Control system also includes:
Read unit, for monitor described exhaust gas pressure in pre-set pressure range time, from controller
Reading and preset slope constant value, wherein, described pre-set pressure range is pre-with described by described preset pressure higher limit
If the pressure limit closed interval that low pressure limit value is constituted；
First regulation unit, for exporting the blower fan of annealing furnace smoke discharging blower fan based on described default slope constant value
Power is adjusted.
8. the control system of annealing furnace smoke discharging blower fan as claimed in claim 7, it is characterised in that described
Control system also includes:
Second regulation unit, for using the first ramp value of described selection block Response to selection to blower fan output work
Rate is adjusted, and described first ramp value is more than described default slope constant value；
First proceeds to unit, and when the most described exhaust gas pressure reaches target pressure value, RS triggers
Control is proceeded in normal PID control by block.
9. the control system of annealing furnace smoke discharging blower fan as claimed in claim 7, it is characterised in that described
Control system also includes:
3rd regulation unit, for using the second ramp value of described selection block Response to selection to blower fan output work
Rate is adjusted, and wherein, described second ramp value is more than described default slope constant value；
Second proceeds to unit, and when the most described exhaust gas pressure reaches target pressure value, RS triggers
Control is proceeded in normal PID control by block.
10. the control system of annealing furnace smoke discharging blower fan as claimed in claim 7, it is characterised in that described
Control system also includes:
Acquiring unit, for obtaining the blower fan output power measurement value of described annealing furnace smoke discharging blower fan；
Comparing unit, relatively described blower fan output power measurement value and current power of fan setting value, it is thus achieved that one
Comparative result；
Determine unit, for determining that the first power of fan value of feedback mated with described comparative result is to described
Controller so that described controller controls described annealing furnace smoke discharging blower fan according to described power of fan value of feedback.
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| CN106011401B (en) | 2018-06-22 |
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