CN103363804B - Method and system for controlling flow of sintering ignition furnace - Google Patents
Method and system for controlling flow of sintering ignition furnace Download PDFInfo
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- CN103363804B CN103363804B CN201310322104.XA CN201310322104A CN103363804B CN 103363804 B CN103363804 B CN 103363804B CN 201310322104 A CN201310322104 A CN 201310322104A CN 103363804 B CN103363804 B CN 103363804B
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Abstract
The embodiment of the invention discloses a method and a system for controlling the flow of a sintering ignition furnace. The method comprises the following steps of determining bellows target flow according to the actual air inlet amount of the ignition furnace; acquiring the bellows actual flow of a bellows; comparing the bellows target flow and the bellows actual flow to obtain bellows flow offset; and correspondingly adjusting the opening degree of a bellows valve according to the bellows flow offset. The opening degree of the bellows valve can correctly and timely correspond to the actual working environment by acquiring the bellows actual flow of the bellows, comparing the bellows actual flow and the bellows target flow which is related to the actual air inlet amount of a hearth of the ignition furnace, and adjusting the opening degree of the bellows valve according to the comparison result, so that the air inlet amount and the air outlet amount of the hearth are kept balanced.
Description
Technical field
The present invention relates to sintering art, particularly relate to a kind of sintering ignition furnace flow control methods and system.
Background technology
In sintering process, ignition furnace is used to provide hot strip flame to the mix surface on sintering pallet, make solid fuel ignition wherein, and make top layer compound sintering under ignition furnace high-temperature flue gas and solid fuel ignition exothermic effects, the heat that simultaneously provides sufficient amount of oxygen and negative pressure that top layer is put aside by air exhauster exhausting is passed to lower one deck compound, thereby the solid fuel that impels lower one deck burns away and makes sintering process along with the operation of sintering machine is carried out gradually downwards, and then completes sintering process.
Under the draft effect of air exhauster, flue gas in ignition furnace burner hearth has the certain thickness bed of material on sintering machine and many groups bellows of being positioned under ignition furnace enter large flue, finally be pumped, bellows are that sintering machine bilateral symmetry is arranged, bellows are provided with air door adjusting valve, when same group of bellows control valve action, both sides bellows move simultaneously, the same group of bellows valve opening that can forever ensure both sides is identical, when general production, be used for regulating combustion chamber draft, basic is the aperture size that regulates bellows valve according to actual condition of production manual operation, the mode of this manual adjustments has certain limitation, in some bursts or in particular cases can cause the fluctuation of combustion chamber draft, cause the sharply variation of fire box temperature simultaneously, at this moment need to adjust targetedly rapidly the parameters of ignition furnace, such as combustion gas and air inlet amount or flue gas rate of air sucked in required, and obviously cannot adapt to and be competent at these bursts or special circumstances by this coarse adjustment mode not in time of manual adjustments bellows valve opening and then adjustment flue gas rate of air sucked in required, can cause unnecessary loss to sintering work thus, such as in the time that bellows valve opening is adjusted excessive, main exhausting system can will be taken away for the gas and the heat that burn in burner hearth in a large number, safeguard that the temperature in burner hearth just must add the gas inlet amount in large pipeline, cause great combustion gas waste, main exhauster is taken a large amount of unnecessary flue gases away simultaneously, has also caused the service load of self to strengthen and waste of energy.
Summary of the invention
The technical problem of controlling flue gas rate of air sucked in required and cannot effectively complete sintering work in order to solve above-mentioned manual adjustment bellows valve opening, the invention provides a kind of sintering ignition furnace flow control methods and system.
The embodiment of the invention discloses following technical scheme:
A kind of sintering ignition furnace flow control methods, comprising:
Determine bellows target flow according to the actual air inflow of ignition furnace;
Gather the bellows actual flow of bellows;
Compare described bellows target flow and described bellows actual flow obtains bellows flow deviation;
According to the corresponding aperture of adjusting bellows valve of described bellows flow deviation.
Preferably, the actual air inflow of described ignition furnace is specially according to the first gas flow FI that passes through igniting pipeline inlet point stove burner hearth
combustion 1with the first air mass flow FI
empty 1and by the second gas flow FI of pitot tube inlet point stove burner hearth
combustion 2with the second air mass flow FI
empty 2calculate.
Preferably, first gas flow of described basis by igniting pipeline inlet point stove burner hearth and the first air mass flow and the second gas flow by pitot tube inlet point stove burner hearth and the second air mass flow are calculated and are specifically comprised:
In the time entering into the ratio of the air fuel gas flow in ignition furnace burner hearth and equal standard air-fuel ratio, in decision-point stove burner hearth, there is no superfluous air and combustion gas;
The actual air inflow of described ignition furnace: FI
in=C(FI
combustion 1+ FI
combustion 2);
Wherein C is combustion gas corresponding exhaust gas volumn constant while fully burning.
Preferably, first gas flow of described basis by igniting pipeline inlet point stove burner hearth and the first air mass flow and the second gas flow by pitot tube inlet point stove burner hearth and the second air mass flow are calculated and are specifically comprised:
In the time entering into the ratio of the air fuel gas flow in ignition furnace burner hearth and be greater than standard air-fuel ratio, air excess in decision-point stove burner hearth;
The actual air inflow of described ignition furnace:
FI
in=C(FI
combustion 1+ FI
combustion 2)+[FI
empty 1+ FI
empty 2-δ (FI
combustion 1+ FI
combustion 2)]
Wherein C is the exhaust gas volumn constant of combustion gas while fully burning;
Wherein δ is the air-fuel ratio coefficient of combustion gas while fully burning.
Preferably, first gas flow of described basis by igniting pipeline inlet point stove burner hearth and the first air mass flow and the second gas flow by pitot tube inlet point stove burner hearth and the second air mass flow are calculated and are specifically comprised:
In the time entering into the ratio of the air fuel gas flow in ignition furnace burner hearth and be less than standard air-fuel ratio, combustion gas surplus in decision-point stove burner hearth;
The actual air inflow of described ignition furnace:
Wherein C is the exhaust gas volumn constant of combustion gas while fully burning;
Wherein δ is the air-fuel ratio coefficient of combustion gas while fully burning.
Preferably, describedly determine that according to the actual air inflow of ignition furnace bellows target flow also comprises disturbance link, described disturbance link is specially:
Obtain burner hearth target negative pressure according to ignition furnace work at present task;
Collection point stove burner hearth actual suction pressure;
Compare described burner hearth target negative pressure and described burner hearth actual suction pressure acquisition point combustion chamber draft deviation;
Calculate described combustion chamber draft deviation and adjust coefficient long-pending and obtain the adjustment flow that disturbance causes;
Determine bellows target flow according to the difference of the actual air inflow of described ignition furnace and described adjustment flow.
A kind of sintering ignition furnace flow control system, comprising:
Bellows target flow the first determining unit, for determining bellows target flow according to the actual air inflow of ignition furnace;
Bellows actual flow collecting unit, for gathering the bellows actual flow of bellows;
Bellows flow deviation computing unit, for comparing described bellows target flow and described bellows actual flow obtains bellows flow deviation;
Bellows valve opening adjustment unit, for adjusting the aperture of bellows valve according to described bellows flow deviation correspondence.
Preferably, described bellows target flow the first determining unit also comprises actual air inflow computing unit:
Described actual air inflow computing unit, for according to by the first gas flow FI of igniting pipeline inlet point stove burner hearth
combustion 1with the first air mass flow FI
empty 1and by the second gas flow FI of pitot tube inlet point stove burner hearth
combustion 2with the second air mass flow FI
empty 2calculate the actual air inflow of described ignition furnace.
Preferably, also comprise disturbance unit:
Described disturbance unit specifically comprises:
Burner hearth target negative pressure determining unit, for obtaining burner hearth target negative pressure according to ignition furnace work at present task;
Burner hearth actual suction pressure collecting unit, for collection point stove burner hearth actual suction pressure;
Combustion chamber draft deviation computing unit, for comparing described burner hearth target negative pressure and described burner hearth actual suction pressure acquisition point combustion chamber draft deviation;
Adjust flow rate calculation unit, for calculating described combustion chamber draft deviation and adjusting coefficient long-pending and obtain the adjustment flow that disturbance causes;
Bellows target flow the second determining unit, for determining bellows target flow according to the difference of the actual air inflow of described ignition furnace and described adjustment flow.
Can be found out by technique scheme, by gathering the actual flow of bellows, and to compare according to the relevant bellows target flow of the actual air inflow of ignition furnace burner hearth, result according to comparison is carried out corresponding adjustment bellows valve opening size, make thus bellows valve aperture size can with actual working environment accurately, corresponding timely, allow the air inflow of burner hearth and capacity keep balance.
Brief description of the drawings
In order to be illustrated more clearly in the embodiment of the present invention or technical scheme of the prior art, to the accompanying drawing of required use in embodiment or description of the Prior Art be briefly described below, apparently, accompanying drawing in the following describes is only some embodiments of the present invention, for those of ordinary skill in the art, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the method flow schematic diagram of a kind of sintering ignition furnace flow control methods of the present invention;
Fig. 2 is another method flow schematic diagram of a kind of sintering ignition furnace flow control methods of the present invention;
Fig. 3 is bellows flow Automatic Control Theory block diagram of the present invention;
Fig. 4 is the system architecture schematic diagram of a kind of sintering ignition furnace flow control system of the present invention;
Fig. 5 is another system architecture schematic diagram of a kind of sintering ignition furnace flow control system of the present invention;
Fig. 6 is another system architecture schematic diagram of a kind of sintering ignition furnace flow control system of the present invention.
Detailed description of the invention
The embodiment of the present invention provides manner of execution and the system of response message.First, by gathering the actual flow of bellows, and to compare according to the relevant bellows target flow of the actual air inflow of ignition furnace burner hearth, result according to comparison is carried out corresponding adjustment bellows valve opening size, make thus bellows valve aperture size can with actual working environment accurately, corresponding timely, allow the air inflow of burner hearth and capacity keep balance.
Secondly, consider the impact of various factors on calculation level stove burner hearth air inflow, to enter the combustion gas of burner hearth and air capacity by igniting pipeline and carry out COMPREHENSIVE CALCULATING by combustion gas and air capacity that pitot tube enters burner hearth, and the impact that calculation level stove burner hearth air inflow is caused of the different combustion cases that cause of the ratio of simultaneously considering different air fuel gas, obtain thus the actual air inflow of burner hearth more accurately.
Finally, in view of burner hearth reality also can produce certain impact into and out of the size of tolerance to the variation of combustion chamber draft, therefore the disturbance factor using the negative pressure variation of burner hearth as burner hearth gas output makes the flow-control of ignition furnace burner hearth accurate and effective more.
For above-mentioned purpose of the present invention, feature and advantage can be become apparent more, below in conjunction with accompanying drawing, the embodiment of the present invention is described in detail.
Embodiment mono-
Refer to Fig. 1, its method flow schematic diagram that is a kind of sintering ignition furnace flow control methods of the present invention, the method comprises the following steps:
S101: determine bellows target flow according to the actual air inflow of ignition furnace;
In the time of the actual air inflow of calculation level stove, the combustion gas and the air that not only need consideration to enter from igniting pipeline, also to consider the combustion gas and the air that enter from pitot tube simultaneously, or consider actual impact combustion chamber draft being changed into and out of tolerance, also or further, consider that combustion chamber draft and different pipeline enter combustion gas and the air capacity of burner hearth simultaneously, based on these three kinds of different embodiments, will in follow-up embodiment bis-and embodiment tri-, be described in detail.
Certainly, the calculating preparation method of the actual air inflow of ignition furnace in this step both can be based on having obtained under above-mentioned three kinds of different embodiments, can be also by other means or prior art obtain.
S102: the bellows actual flow that gathers bellows;
The bellows of ignition furnace are generally arranged on the below of ignition furnace, go out for the fume emission by air exhauster, material surface ignition on chassis under ignition furnace being burnt and pass through the bed of material, flow detector is laid at air inlet place at bellows, generally have two checkout gears for one group of bellows, the flow number that two checkout gears are detected is added is the actual flow value of these group bellows.
Need to further illustrate for S101 and S102, in the time that the present embodiment is carried out, S101 and S102 there is no dividing of sequencing, also can carry out simultaneously.
S103: compare described bellows target flow and described bellows actual flow obtains bellows flow deviation;
In general ignition furnace disposes many group bellows, the environment of the air outlet of bellows is also not quite similar, that is to say, need to be according to actual condition, assign to each group of bellows using definite bellows target flow as total flow, can divide equally definite bellows target flow for the bellows of identical air draft power, also can pro rata distribute the bellows target flow of each group of bellows according to the actual air draft ability of bellows.
S104: according to the corresponding aperture of adjusting bellows valve of described bellows flow deviation.
That is to say, if bellows flow deviation be on the occasion of, be that bellows target flow is while being greater than bellows actual flow, show that current actual waste gas discharge rate is less than target discharge rate, need to tune up bellows valve opening for this situation increases toxic emission speed with this, reduces toxic emission speed otherwise turn bellows valve opening down with this.
Can be found out by the present embodiment, by gathering the actual flow of bellows, and to compare according to the relevant bellows target flow of the actual air inflow of ignition furnace burner hearth, result according to comparison is carried out corresponding adjustment bellows valve opening size, make thus bellows valve aperture size can with actual working environment accurately, corresponding timely, allow the air inflow of burner hearth and capacity keep balance.
Embodiment bis-
On the basis of embodiment mono-, the present embodiment will be described in detail the combustion gas that enters burner hearth according to different pipelines and the actual air inflow of air capacity calculating ignition furnace.
That is to say, the actual air inflow of described ignition furnace is specially according to the first gas flow FI that passes through igniting pipeline inlet point stove burner hearth
combustion 1with the first air mass flow FI
empty 1and by the second gas flow FI of pitot tube inlet point stove burner hearth
combustion 2with the second air mass flow FI
empty 2calculate.
In the time calculating, to accurately consider the combustion case in burner hearth, the Main Basis of determining combustion case is the size that enters the air-fuel ratio of burner hearth, the namely ratio of air and combustion gas, in general, air-fuel ratio in the time that air and combustion gas can fully burn that air fuel gas can exhaust completely in the process of burning is standard air-fuel ratio, in the time that the current air-fuel ratio of burner hearth is greater than this standard air-fuel ratio, show air excess in burner hearth, in the time that the current air-fuel ratio of burner hearth is less than standard air-fuel ratio, show lack of air in burner hearth, combustion gas surplus.Corresponding these three kinds of combustion cases that may occur, have following different account form.
In the time that the air fuel gas flow-rate ratio in ignition furnace burner hearth equals standard air-fuel ratio, in decision-point stove burner hearth, there is no superfluous air and combustion gas;
The actual air inflow of described ignition furnace: FI
in=C(FI
combustion 1+ FI
combustion 2);
Wherein C is combustion gas corresponding exhaust gas volumn constant while fully burning.
Here it should be noted that, for different types of combustion gas type, such as when coke-stove gas or natural gas, exhaust gas volumn constant is different, in the time that combustion gas type is blast furnace gas:
FI
in is high=C
high(FI
combustion 1+ FI
combustion 2)
Wherein C
highthe corresponding exhaust gas volumn constant producing while fully burning for blast furnace gas.
In like manner, in the time that combustion gas is coke-stove gas, natural gas, coal gas of converter, propane, the flue gas value of generation is:
FI
jiao in=C
burnt(FI
combustion 1+ FI
combustion 2)
FI
in is natural=C
natural(FI
combustion 1+ FI
combustion 2)
FI
in turns=C
turn(FI
combustion 1+ FI
combustion 2)
FI
in propane=C
propane(FI
combustion 1+ FI
combustion 2)
Be mixed gas when ignition furnace uses combustion gas:
FI
in mixes=S
turnfI
in turns+ S
propanefI
in propane+ S
highfI
in is high+ S
burntfI
jiao in+ S
naturalfI
in is natural
Wherein S
xfor x combustion gas shared percent by volume in this air mixture.
In the time that the air fuel gas flow-rate ratio in ignition furnace burner hearth is greater than standard air-fuel ratio, air excess in decision-point stove burner hearth;
The actual air inflow of described ignition furnace:
FI
in=C(FI
combustion 1+ FI
combustion 2)+[FI
empty 1+ FI
empty 2-δ (FI
combustion 1+ FI
combustion 2)]
Wherein C is the exhaust gas volumn constant of combustion gas while fully burning;
Wherein δ is the air-fuel ratio coefficient of combustion gas while fully burning.
In the time that ignition furnace uses combustion gas to be respectively blast furnace gas, coke-stove gas, natural gas, coal gas of converter, propane,
FI
in is high=C
high(FI
combustion 1+ FI
combustion 2)+[FI
empty 1+ FI
empty 2-δ
high(FI
combustion 1+ FI
combustion 2)]
FI
jiao in=C
burnt(FI
combustion 1+ FI
combustion 2)+[FI
empty 1+ FI
empty 2-δ
burnt(FI
combustion 1+ FI
combustion 2)]
FI
in is natural=C
natural(FI
combustion 1+ FI
combustion 2)+[FI
empty 1+ FI
empty 2-δ
natural(FI
combustion 1+ FI
combustion 2)]
FI
in turns=C
turn(FI
combustion 1+ FI
combustion 2)+[FI
empty 1+ FI
empty 2-δ
turn(FI
combustion 1+ FI
combustion 2)]
FI
in propane=C
propane(FI
combustion 1+ FI
combustion 2)+[FI
empty 1+ FI
empty 2-δ
propane(FI
combustion 1+ FI
combustion 2)]
Wherein δ
xair-fuel ratio coefficient while fully burning for x combustion gas.
In the time that ignition furnace uses combustion gas for air mixture:
FI
in mixes=S
turnfI
in turns+ S
highfI
in is high+ S
burntfI
jiao in+ S
naturalfI
in is natural+ S
propanefI
in propane
Wherein S
xfor x combustion gas shared percent by volume in this air mixture.
In the time that the air fuel gas flow-rate ratio in ignition furnace burner hearth is less than standard air-fuel ratio, combustion gas surplus in decision-point stove burner hearth;
The actual air inflow of described ignition furnace:
Wherein C is the exhaust gas volumn constant of combustion gas while fully burning;
Wherein δ is the air-fuel ratio coefficient of combustion gas while fully burning.
In the time that ignition furnace uses combustion gas to be respectively blast furnace gas, coke-stove gas, natural gas, coal gas of converter, propane,
Wherein δ
xair-fuel ratio coefficient while fully burning for x combustion gas.
In the time that ignition furnace uses combustion gas for air mixture:
FI
in mixes=S
turnfI
in turns+ S
highfI
in is high+ S
burntfI
jiao in+ S
naturalfI
in is natural+ S
propanefI
in propane
Wherein S
xfor x combustion gas shared percent by volume in this air mixture.
As can be seen from the above-described embodiment, first, by gathering the actual flow of bellows, and to compare according to the relevant bellows target flow of the actual air inflow of ignition furnace burner hearth, result according to comparison is carried out corresponding adjustment bellows valve opening size, make thus bellows valve aperture size can with actual working environment accurately, corresponding timely, allow the air inflow of burner hearth and capacity keep balance.
Secondly, consider the impact of various factors on calculation level stove burner hearth air inflow, to enter the combustion gas of burner hearth and air capacity by igniting pipeline and carry out COMPREHENSIVE CALCULATING by combustion gas and air capacity that pitot tube enters burner hearth, and the impact that calculation level stove burner hearth air inflow is caused of the different combustion cases that cause of the ratio of simultaneously considering different air fuel gas, obtain thus the actual air inflow of burner hearth more accurately.
Embodiment tri-
In view of burner hearth reality also can produce certain impact into and out of the size of tolerance to the variation of combustion chamber draft, on the basis of embodiment mono-, the present embodiment will be described in detail calculate as a whole according to combustion chamber draft disturbance factor, namely disturbance link, refer to Fig. 2, its another method flow schematic diagram that is a kind of sintering ignition furnace flow control methods of the present invention.
Describedly determine that according to the actual air inflow of ignition furnace bellows target flow also comprises disturbance link, described disturbance link is specially:
S201: obtain burner hearth target negative pressure according to ignition furnace work at present task;
Here it should be noted that, different tasks has different goal-selling requirements to combustion chamber draft, has just repeated no longer one by one here.
S202: collection point stove burner hearth actual suction pressure;
S203: compare described burner hearth target negative pressure and described burner hearth actual suction pressure acquisition point combustion chamber draft deviation;
S204: calculate described combustion chamber draft deviation and adjust coefficient long-pending and obtain the adjustment flow that disturbance causes;
S205: determine bellows target flow according to the difference of the actual air inflow of described ignition furnace and described adjustment flow.
The meaning of introducing disturbance link is the variation of the factors such as the inleakage of sintering machine speed, sintering machine to be caused to the variation introducing of negative pressure is controlled automatically.Because in the time of inlet-outlet flow balance, in the good situation of gas permeability, variation, the variation of exhausting system condition and the variations of air leakage rate of sintering machine etc. of sintering machine speed all can cause the sharply variation of combustion chamber draft, now, introduce negative pressure as disturbance factor, the aim parameter that adjusts throughput can be calculated fast, only need, by stable the actual flow-control of giving vent to anger, new flow-control balance can be reached.
Meanwhile, determine bellows target flow for S205, the actual air inflow of having obtained is deducted to the adjustment flow that the definite disturbance of disturbance link causes and just can determine further bellows target flow more accurately.
Preferred embodiment of the invention scheme is on the basis based on embodiment bis-, thereby confirm under the prerequisite of the actual air inflow of ignition furnace in the combustion gas and the air capacity that enter burner hearth by considering different pipelines, further combustion chamber draft is changed to the impact on calculating burner hearth target gas output, that is to say that considering at the same time that combustion chamber draft and different pipeline enter under the gas-air amount of burner hearth determines bellows target flow.For this preferred embodiment, refer to Fig. 3, it is bellows flow Automatic Control Theory block diagram of the present invention, ading up to two groups and be described as example going out bellows that throughput controls, comprises 1# bellows and 2# bellows, and idiographic flow comprises:
First in disturbance link, subtracter 30 calculates combustion chamber draft deviation delta E10 according to burner hearth actual suction pressure PI10 and the burner hearth target negative pressure P_sv of input, and multiplier 31 calculates according to combustion chamber draft deviation delta E10 and adjustment coefficient k the adjustment flow that disturbance causes.
Under the numerical procedure based on embodiment bis-, calculate actual air inflow FI by thermal technology
in, subtracter 32 is according to actual air inflow FI
inobtain bellows target flow with described adjustment flow rate calculation, the bellows target flow here specifically pointer is the general objective flow of 1# bellows and 2# bellows to two groups of bellows, this general objective flow input divider 33, divider 33 is reasonably assigned to 1# and 2# bellows according to the actual power of these two groups of bellows and actual air draft ability by general objective flow, as the invention target flow of these two groups of bellows, export targetedly 1# bellows target flow P_sv21 and 2# bellows target flow P_sv22.
For 1# bellows, subtracter 34 calculates 1# bellows flow deviation Δ E21 according to the 1# bellows target flow P_sv21 of input and the 1# bellows actual flow FI21 obtaining by flow detector, and adjuster 35 is adjusted the aperture size of 1# bellows valve according to the control 1# bellows control valve of the size of 1# bellows flow deviation Δ E21 and positive and negative correspondence.
In like manner, for 2# bellows, subtracter 36 calculates 2# bellows flow deviation Δ E22 according to the 2# bellows target flow F_sv22 of input and the 2# bellows actual flow FI22 obtaining by flow detector, and adjuster 37 is adjusted the aperture size of 2# bellows valve according to the control 2# bellows control valve of the size of 2# bellows flow deviation Δ E22 and positive and negative correspondence.
Generally, in the time that change of external conditions causes that combustion chamber draft PI10 changes, the difference Δ E10 of burner hearth target negative pressure P_sv and actual suction pressure PI10 and the long-pending target flow that can automatically adjust bellows flow of adjusting coefficient k, adjuster 21,22 re-execute computing output control and regulation valve, and control system will enter new flow equilibrium state.In the time that actual suction pressure PI10 diminishes, in disturbance link, Δ E10 becomes large, becomes large, thereby have actual air inflow FI with the product of adjusting coefficient k
indiminish with the difference of disturbance link, target gas output should reduce; And actual suction pressure PI10 just in time need to reduce burner hearth gas output while diminishing can be towards increasing the control of negative pressure direction.Otherwise in the time that actual suction pressure PI10 increases, target gas output should be towards the direction control increasing.
As can be seen from the above-described embodiment, first, by gathering the actual flow of bellows, and to compare according to the relevant bellows target flow of the actual air inflow of ignition furnace burner hearth, result according to comparison is carried out corresponding adjustment bellows valve opening size, make thus bellows valve aperture size can with actual working environment accurately, corresponding timely, allow the air inflow of burner hearth and capacity keep balance.
Secondly, consider the impact of various factors on ignition furnace burner hearth air inflow, to enter the combustion gas of burner hearth and air capacity by igniting pipeline and carry out COMPREHENSIVE CALCULATING by combustion gas and air capacity that pitot tube enters burner hearth, and the impact that calculation level stove burner hearth air inflow is caused of the different combustion cases that cause of the ratio of simultaneously considering different air fuel gas, obtain thus the actual air inflow of burner hearth more accurately.
Finally, in view of burner hearth reality also can produce certain impact into and out of the size of tolerance to the variation of combustion chamber draft, therefore the disturbance factor using the negative pressure variation of burner hearth as the actual gas output of burner hearth makes the flow-control of ignition furnace burner hearth accurate and effective more.
Embodiment tetra-
Refer to as Fig. 4, its system architecture schematic diagram that is a kind of sintering ignition furnace flow control system of the present invention, comprising:
Bellows target flow the first determining unit 401, for determining bellows target flow according to the actual air inflow of ignition furnace;
Preferably, the device shown in earlier figures 4 can also comprise actual air inflow computing unit 501, as shown in Figure 5:
Described bellows target flow the first determining unit also comprises actual air inflow computing unit 501:
Described actual air inflow computing unit 501, for according to by the first gas flow FI of igniting pipeline inlet point stove burner hearth
combustion 1with the first air mass flow FI
empty 1and by the second gas flow FI of pitot tube inlet point stove burner hearth
combustion 2with the second air mass flow FI
empty 2calculate the actual air inflow of described ignition furnace.
Preferably, can also comprise disturbance unit 601, as shown in Figure 6:
Described disturbance unit 601 specifically comprises:
Burner hearth target negative pressure determining unit 6011, for obtaining burner hearth target negative pressure according to ignition furnace work at present task;
Burner hearth actual suction pressure collecting unit 6012, for collection point stove burner hearth actual suction pressure;
Combustion chamber draft deviation computing unit 6013, for comparing described burner hearth target negative pressure and described burner hearth actual suction pressure acquisition point combustion chamber draft deviation;
Adjust flow rate calculation unit 6014, for calculating described combustion chamber draft deviation and adjusting coefficient long-pending and obtain the adjustment flow that disturbance causes;
Bellows target flow the second determining unit 6015, for determining bellows target flow according to the actual air inflow of described ignition furnace and described adjustment flow.
Bellows actual flow collecting unit 402, for gathering the bellows actual flow of bellows;
Bellows flow deviation computing unit 403, for comparing described bellows target flow and described bellows actual flow obtains bellows flow deviation;
Bellows valve opening adjustment unit 404, for adjusting the aperture of bellows valve according to described bellows flow deviation correspondence.
As can be seen from the above-described embodiment, first, by gathering the actual flow of bellows, and to compare according to the relevant bellows target flow of the actual air inflow of ignition furnace burner hearth, result according to comparison is carried out corresponding adjustment bellows valve opening size, make thus bellows valve aperture size can with actual working environment accurately, corresponding timely, allow the air inflow of burner hearth and capacity keep balance.
Secondly, consider the impact of various factors on ignition furnace burner hearth air inflow, to enter the combustion gas of burner hearth and air capacity by igniting pipeline and carry out COMPREHENSIVE CALCULATING by combustion gas and air capacity that pitot tube enters burner hearth, and the impact that calculation level stove burner hearth air inflow is caused of the different combustion cases that cause of the ratio of simultaneously considering different air fuel gas, obtain thus the actual air inflow of burner hearth more accurately.
Finally, in view of burner hearth reality also can produce certain impact into and out of the size of tolerance to the variation of combustion chamber draft, therefore the disturbance factor using the negative pressure variation of burner hearth as the actual gas output of burner hearth makes the flow-control of ignition furnace burner hearth accurate and effective more.
It should be noted that, one of ordinary skill in the art will appreciate that all or part of flow process realizing in above-described embodiment method, can carry out the hardware that instruction is relevant by computer program to complete, described program can be stored in a computer read/write memory medium, this program, in the time carrying out, can comprise as the flow process of the embodiment of above-mentioned each side method.Wherein, described storage medium can be magnetic disc, CD, read-only store-memory body (Read-Only Memory, ROM) or random store-memory body (Random Access Memory, RAM) etc.
Above a kind of sintering ignition furnace flow control methods provided by the present invention and system are described in detail, applied specific embodiment herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.
Claims (9)
1. a sintering ignition furnace flow control methods, is characterized in that, comprising:
Determine bellows target flow according to the actual air inflow of ignition furnace;
Gather the bellows actual flow of bellows;
Compare described bellows target flow and described bellows actual flow obtains bellows flow deviation;
According to the corresponding aperture of adjusting bellows valve of described bellows flow deviation.
2. sintering ignition furnace flow control methods according to claim 1, is characterized in that,
The actual air inflow of described ignition furnace is specially according to the first gas flow FI that passes through igniting pipeline inlet point stove burner hearth
combustion 1with the first air mass flow FI
empty 1and by the second gas flow FI of pitot tube inlet point stove burner hearth
combustion 2with the second air mass flow FI
empty 2calculate.
3. sintering ignition furnace flow control methods according to claim 2, it is characterized in that, first gas flow of described basis by igniting pipeline inlet point stove burner hearth and the first air mass flow and the second gas flow by pitot tube inlet point stove burner hearth and the second air mass flow are calculated and are specifically comprised:
In the time entering into the ratio of the air fuel gas flow in ignition furnace burner hearth and equal standard air-fuel ratio, in decision-point stove burner hearth, there is no superfluous air and combustion gas;
The actual air inflow of described ignition furnace: FI
in=C (FI
combustion 1+ FI
combustion 2);
Wherein C is combustion gas corresponding exhaust gas volumn constant while fully burning.
4. sintering ignition furnace flow control methods according to claim 2, it is characterized in that, first gas flow of described basis by igniting pipeline inlet point stove burner hearth and the first air mass flow and the second gas flow by pitot tube inlet point stove burner hearth and the second air mass flow are calculated and are specifically comprised:
In the time entering into the ratio of the air fuel gas flow in ignition furnace burner hearth and be greater than standard air-fuel ratio, air excess in decision-point stove burner hearth;
The actual air inflow of described ignition furnace:
FI
in=C (FI
combustion 1+ FI
combustion 2)+[FI
empty 1+ FI
empty 2-δ (FI
combustion 1+ FI
combustion 2)]
Wherein C is the exhaust gas volumn constant of combustion gas while fully burning;
Wherein δ is the air-fuel ratio coefficient of combustion gas while fully burning.
5. sintering ignition furnace flow control methods according to claim 2, it is characterized in that, first gas flow of described basis by igniting pipeline inlet point stove burner hearth and the first air mass flow and the second gas flow by pitot tube inlet point stove burner hearth and the second air mass flow are calculated and are specifically comprised:
In the time entering into the ratio of the air fuel gas flow in ignition furnace burner hearth and be less than standard air-fuel ratio, combustion gas surplus in decision-point stove burner hearth;
The actual air inflow of described ignition furnace:
Wherein C is the exhaust gas volumn constant of combustion gas while fully burning;
Wherein δ is the air-fuel ratio coefficient of combustion gas while fully burning.
6. sintering ignition furnace flow control methods according to claim 1 and 2, is characterized in that, describedly determines that according to the actual air inflow of ignition furnace bellows target flow also comprises disturbance link, and described disturbance link is specially:
Obtain burner hearth target negative pressure according to ignition furnace work at present task;
Collection point stove burner hearth actual suction pressure;
Compare described burner hearth target negative pressure and described burner hearth actual suction pressure acquisition point combustion chamber draft deviation;
Calculate described combustion chamber draft deviation and adjust coefficient long-pending and obtain the adjustment flow that disturbance causes;
Determine bellows target flow according to the difference of the actual air inflow of described ignition furnace and described adjustment flow.
7. a sintering ignition furnace flow control system, is characterized in that, comprising:
Bellows target flow the first determining unit, for determining bellows target flow according to the actual air inflow of ignition furnace;
Bellows actual flow collecting unit, for gathering the bellows actual flow of bellows;
Bellows flow deviation computing unit, for comparing described bellows target flow and described bellows actual flow obtains bellows flow deviation;
Bellows valve opening adjustment unit, for adjusting the aperture of bellows valve according to described bellows flow deviation correspondence.
8. sintering ignition furnace flow control system according to claim 7, is characterized in that, described bellows target flow the first determining unit also comprises actual air inflow computing unit:
Described actual air inflow computing unit, for according to by the first gas flow FI of igniting pipeline inlet point stove burner hearth
combustion 1with the first air mass flow FI
empty 1and by the second gas flow FI of pitot tube inlet point stove burner hearth
combustion 2with the second air mass flow FI
empty 2calculate the actual air inflow of described ignition furnace.
9. according to the sintering ignition furnace flow control system described in claim 7 or 8, it is characterized in that, also comprise disturbance unit:
Described disturbance unit specifically comprises:
Burner hearth target negative pressure determining unit, for obtaining burner hearth target negative pressure according to ignition furnace work at present task;
Burner hearth actual suction pressure collecting unit, for collection point stove burner hearth actual suction pressure;
Combustion chamber draft deviation computing unit, for comparing described burner hearth target negative pressure and described burner hearth actual suction pressure acquisition point combustion chamber draft deviation;
Adjust flow rate calculation unit, for calculating described combustion chamber draft deviation and adjusting coefficient long-pending and obtain the adjustment flow that disturbance causes;
Bellows target flow the second determining unit, for determining bellows target flow according to the difference of the actual air inflow of described ignition furnace and described adjustment flow.
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| JP6529856B2 (en) * | 2015-08-13 | 2019-06-12 | 中外炉工業株式会社 | Heat storage body maintenance time notification device of heat storage type burner, heat storage body maintenance time notification method of heat storage type burner, and remodeling method of combustion furnace using heat storage type burner |
| CN105004184B (en) * | 2015-08-27 | 2017-03-08 | 马鞍山钢铁股份有限公司 | A kind of on-line measuring device of sintering process air mass flow and its detection method |
| CN106288750B (en) * | 2016-08-25 | 2019-04-09 | 山东中烟工业有限责任公司 | A kind of tobacco cutting combustion furnace gas flow exception verification control method |
| CN110207362B (en) * | 2018-11-08 | 2021-08-06 | 华帝股份有限公司 | Self-adaptive control method for air volume of gas water heater |
| CN111521017B (en) * | 2020-04-17 | 2021-11-02 | 马鞍山钢铁股份有限公司 | Control method for balancing sintering air volume |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040098469A (en) * | 2003-05-15 | 2004-11-20 | 주식회사 포스코 | Air flow control apparatus of sintering machine |
| CN101339058A (en) * | 2008-08-14 | 2009-01-07 | 中冶长天国际工程有限责任公司 | Ignition furnace discharge gas flow quantity checking method and system |
| CN101949549A (en) * | 2010-10-18 | 2011-01-19 | 攀钢集团钢铁钒钛股份有限公司 | Flow control method of combustion system |
| CN102032786A (en) * | 2009-09-29 | 2011-04-27 | 中冶长天国际工程有限责任公司 | Method and system for adjusting two large flues of sintering machine |
| CN102997671A (en) * | 2012-12-27 | 2013-03-27 | 中冶长天国际工程有限责任公司 | Method and system for controlling air volume of air box of sintering trolley |
-
2013
- 2013-07-29 CN CN201310322104.XA patent/CN103363804B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20040098469A (en) * | 2003-05-15 | 2004-11-20 | 주식회사 포스코 | Air flow control apparatus of sintering machine |
| CN101339058A (en) * | 2008-08-14 | 2009-01-07 | 中冶长天国际工程有限责任公司 | Ignition furnace discharge gas flow quantity checking method and system |
| CN102032786A (en) * | 2009-09-29 | 2011-04-27 | 中冶长天国际工程有限责任公司 | Method and system for adjusting two large flues of sintering machine |
| CN101949549A (en) * | 2010-10-18 | 2011-01-19 | 攀钢集团钢铁钒钛股份有限公司 | Flow control method of combustion system |
| CN102997671A (en) * | 2012-12-27 | 2013-03-27 | 中冶长天国际工程有限责任公司 | Method and system for controlling air volume of air box of sintering trolley |
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