CN102032786B - Method and system for adjusting two large flues of sintering machine - Google Patents
Method and system for adjusting two large flues of sintering machine Download PDFInfo
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- CN102032786B CN102032786B CN 200910178550 CN200910178550A CN102032786B CN 102032786 B CN102032786 B CN 102032786B CN 200910178550 CN200910178550 CN 200910178550 CN 200910178550 A CN200910178550 A CN 200910178550A CN 102032786 B CN102032786 B CN 102032786B
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Abstract
The invention discloses a method and a system for adjusting two large flues of a sintering machine. The method comprises the following steps of: setting air volume needed for production as target air volume of fans; controlling the opening of air doors of the two fans to increase alternately and stepwise; and when the target air volume of the two fans is achieved, stopping the control operation. By using the method and the system, the air doors of the two fans are opened alternately and stepwise, so that the air volume of the two fans is increased alternately and stepwise until the air volume needed for production is achieved. Simultaneously, the current balance state of the two fans is detected and the opening of the air doors of the fans is adjusted at any time according to the current balance state so as to ensure no breakdown and imbalance beyond the reasonable range of the two fans during production and greatly improve the working efficiency.
Description
Technical field
The present invention relates to metallurgy sintered equipment technical field, particularly a kind of method and system that realize that the two large flues of sintering machine are regulated.
Background technology
In steel sintering equipment, the large flue of sintering machine is the passage that the sintering pallet air-flow of coming is discharged from chimney by main exhauster.And be subject to the restriction of the factors such as structure and material, and the present above sintering machine of 300 square meters commonly used pair large flues that adopt more, wherein two main exhausters are arranged in parallel, concentric stack; As depicted in figs. 1 and 2, blower fan 2 air-flow that chassis is come is extracted out and is discharged from chimney 4 by large flue 1 and air door 3.
Wherein, although two large flues arranging in the sintering machine are relatively independent, but in actual production, because the load of two large flues can not all guarantee balance at any time, so having two flues mutually goes here and there the situation of wind and occurs, especially there is the common segment part in two large flues, as shown in Figure 2, impact on two Fans when string wind occurring is just more obvious: when string wind occurring, because two Fans is load unbalanced, can cause the air mass flow of chassis sintering deposit on two flues inconsistent, cause the sintering quality of chassis left and right sides sintering deposit different, and then cause a side burning, and the opposite side burning is not saturating; In addition, part air quantity in-fighting between two Fans when string wind occurring, thus also can affect the service efficiency of blower fan; Even under extreme case; the situation that may cause a Fans to blow an other Fans occurs: namely the interior air-flow of large flue has driven the interior air-flow of another one large flue; cause a Fans band two Fans load; so that a Fans surpasses rated power operation; and an other Fans is blown; its running load is lower than unloaded load, thereby causes a Fans trip protection, and what impact was produced carries out continuously.
Thereby, in actual production, for keeping existing balance between two Fans, just must adjust the load of blower fan by regulating fan delivery, thereby avoid the appearance of accident; And mainly be to rely on artificial the participation at present, namely Ventilator Room post operation personnel in time find and in time regulate, but the obvious efficient of this mode is very low, and owing to can't in time adjust the collapse that can cause blower fan system, what impact was produced normally carries out.
Summary of the invention
In view of this, in order to solve the deficiency of existing manual adjustment air quantity, the embodiment of the invention provides a kind of method and system that realize that the two large flues of sintering machine are regulated, and can guarantee that the energy imbalance of zone of reasonableness does not appear collapsing and exceeding in two Fans in process of production, has improved operating efficiency.
For this reason, the technical scheme that provides of the embodiment of the invention is as follows:
A kind of method that realizes that the two large flues of sintering machine are regulated comprises:
The target air quantity of default blower fan is for producing Air Quantity Required;
The throttle opening of controlling two Fans replaces stepping and rises;
After reaching the target air quantity, two Fans stop control operation.
Preferably, come in the following manner to determine whether current fan delivery reaches the target air quantity: utilize fan delivery and the proportionate relationship of blower fan electric current to obtain and produce blower fan electric current corresponding to Air Quantity Required; Detect the blower fan electric current, when described blower fan electric current has reached when producing blower fan electric current corresponding to Air Quantity Required, determine that current fan delivery is the target air quantity.
Preferably, the method also comprises: replace in control two air door of fan apertures and detect two blower fan electric currents when stepping is risen, and adjust throttle opening according to the electric current of two blower fans.
Preferably, describedly adjust throttle opening according to two blower fan electric currents and comprise: when two air door of fan apertures equate, if two blower fan current imbalances, the throttle opening that then blower fan that electric current is less is corresponding compared to the larger air door of fan aperture of electric current some number of degrees that rise, until the electric current of two blower fans reaches balance more; The air door of fan aperture that wherein said electric current the is less step-lengths that rise are 1 degree more.
Preferably, the method also comprises: detect two blower fan electric currents, if wherein the electric current of a Fans reduces suddenly, then the air door of its corresponding blower fan is opened greatly, until the electric current between two Fans reaches new balance.
Preferably, the method also comprises: detect two blower fan electric currents, if a Fans electric current sharply reduces, and another Fans electric current sharply increases, the air door of the blower fan that sharply reduces of close current then, and open again air door dragging the state of single flue in the current stabilization of another Fans after.
Preferably, the method also comprises: if two blower fan electric currents still do not reach poised state after adjusting, then with two Fans air door Close Alls, carry out regulating step again.
Preferably, to replace the step-length that stepping rises be 1 degree to the throttle opening of described two Fans.
A kind of system that realizes that the two large flues of sintering machine are regulated comprises: setting unit, control module and processing unit; Wherein, described setting unit is set as blower fan target air quantity in order to will produce Air Quantity Required, and notice is to described control module and processing unit; Described control module is in order to after being provided with the target air quantity in described setting unit, and the throttle opening of controlling two Fans replaces stepping and rises; Described processing unit is in order to detecting the air quantity of two Fans, and after described fan delivery reaches the target air quantity that described setting unit arranges, notifies described control module to stop control operation.
Preferably, described processing unit comprises: acquisition module and detection module; Wherein, described acquisition module is used for utilizing fan delivery and the proportionate relationship of blower fan electric current to obtain blower fan electric current corresponding to production Air Quantity Required; Described detection module is for detection of the blower fan electric current, and reached when producing blower fan electric current corresponding to Air Quantity Required when described blower fan electric current, notifies described control module to stop control operation.
Preferably, this system also comprises: adjustment unit, be used for replacing when stepping rises at the throttle opening that described control module is controlled two Fans, and detect two blower fan electric currents, and adjust throttle opening according to the electric current of two blower fans.
Preferably, this system also comprises: balancing unit, and for detection of two blower fan electric currents, and when wherein the electric current of a Fans reduces suddenly, notify described control module that the air door of its corresponding blower fan is opened greatly, until the electric current between two Fans reaches new balance; Perhaps, when a Fans electric current sharply reduces, and another Fans electric current is when sharply increasing, and notifies the air door of the blower fan that described control module close current sharply reduces, and notifies described control module to open its air door dragging the state of single flue in the current stabilization of another Fans after.
By above technical scheme provided by the invention as seen, open by the alternately stepping of controlling two air door of fan, so that mutually alternately stepping rising of the air quantity of two Fans, until reach the production Air Quantity Required, detect simultaneously the current balance type state of two blower fans, and adjust at any time the aperture of air door of fan according to described current balance type state, thus guaranteed that the energy imbalance of zone of reasonableness does not appear collapsing and exceeding in two Fans in process of production, and improved greatly operating efficiency.
Description of drawings
Fig. 1 is the structural representation of the two large flues of sintering machine in the prior art;
Fig. 2 is the top view of the two large flues of sintering machine in the prior art;
Fig. 3 is the method flow schematic diagram of first embodiment of the invention;
Fig. 4 is the structural representation that the air door of fan in the first embodiment of the invention is opened;
Fig. 5 is the system architecture schematic diagram of fifth embodiment of the invention.
The specific embodiment
In order to make those skilled in the art person understand better the present invention program, and above-mentioned purpose of the present invention, feature and advantage can be become apparent more, the present invention is further detailed explanation below in conjunction with the drawings and specific embodiments.
Referring to Fig. 3, Fig. 3 is two large flue control method schematic flow sheets of first embodiment of the invention; Wherein, the method comprises:
Step 301: will produce the target air quantity that Air Quantity Required is set as blower fan;
After the starting of two Fans is complete, the air door of two Fans all is in closed condition, this moment, two Fans all were in the no-load running state: namely be not with the air blowing machine during two Fans wheel rotation, the load of blower fan does not have airload for the load that overcomes the blower fan resistance, and this moment, the load of blower fan was minimum; Even it should be noted that certainly air door is closed fully in actual production, also can not intercept air fully and do not allow it flow through, thereby usually 5% following throttle opening is considered as the air door closed condition in the embodiment of the invention.Then for actual demand, the production Air Quantity Required is set as respectively the target air quantity of two Fans.
Step 302: the throttle opening of controlling two Fans replaces stepping and rises;
Concrete, the air door of controlling two Fans replaces stepping automatically to be opened, and the air door A that for example controls blower fan 1 opens first 1 degree, and the air door B that then controls blower fan 2 opens 1 degree again, certainly concrete throttle opening can be adjusted according to actual conditions, replaces stepping such as the air door of two blower fans and opens 2 degree etc.;
Wherein, the air door of every Fans is opened referring to the air door of fan shown in Fig. 4 and is opened schematic diagram: control length-adjustable throttle linkage 31 and open certain number of degrees by universal joint 32 drive air doors 3, thereby so that blower fan can be extracted the air-flow of certain air quantity out from large flue 1, the mode that certain concrete control air door is opened also can adopt existing other modes to carry out, and the present embodiment repeats no more; Wherein, the variation of throttle opening can cause the variation of fan delivery, the variation of air door air quantity can cause the variation of blower fan load, and the variation of blower fan load can be reflected on the curent change, thereby in the process that described air door of fan is opened, if the curent change balance of two blower fans shows that then the air quantity of current two blower fans also is in poised state;
Further, because two air door of fan apertures are alternately upwards, thereby also be alternately to increase by the air quantity that two air door of fan pass through, and because the rising of two air door of fan apertures is to carry out in the mode of stepping, thereby so that the air quantity that is passed through by two air door of fan also increase gradually; And because air door can cause the variation of blower fan load by the variation of air quantity, so in the process that the air quantity through two air door of fan alternately increases gradually, the load of described two blower fans also is alternately to increase gradually, this has just been avoided because two air door of fan are directly all opened, make its air quantity that passes through suddenly increase the situation that caused two blower fans load increases suddenly, thereby can effectively control the energy imbalance that zone of reasonableness does not appear collapsing and exceeding in two Fans in process of production, thereby can greatly improve the operating efficiency of blower fan.
Step 303: after two Fans reach the target air quantity, stop control operation.
As mentioned above, the variation of throttle opening can cause the variation of fan delivery, and the variation of fan delivery can cause the variation of blower fan load, the variation of blower fan load can be reflected on the electric current, thereby the present embodiment proposes and can determine whether current fan delivery has reached the target air quantity according to the blower fan electric current, certainly also can come by other means to determine that whether current fan delivery has reached the target air quantity, repeats no more herein;
For example: if the blower fan rated current is 461A, the nominal air delivery of blower fan is 19800 cubes m/mins, and cube being directly proportional with the power of blower fan of the air quantity of blower fan, square being directly proportional of the power of blower fan and blower fan electric current, so the air quantity of blower fan is directly proportional with 2/3 power of electric current in theory, wherein the present embodiment is ignored and is overcome resistance institute work to the influence of peak current; Thereby, if producing Air Quantity Required is 19800 cubic metres/timesharing, it produces blower fan electric current corresponding to Air Quantity Required is 461A, also be set as 19800 cubic metres/timesharing by abovementioned steps with the target air quantity of blower fan this moment, electric current corresponding when then blower fan reaches the target air quantity also is 461A, so when the electric current of described blower fan reaches 461A, can determine that the current air quantity of described blower fan has reached 19800 cubes m/mins of target air quantity.In addition, it should be noted that usually described air door can't be opened fully when blower fan reaches the target air quantity and stops to regulate, in the actual production according to production requirement, the common aperture scope of the aperture of described air door 50～70 spend between.
The embodiment of the invention two has also proposed a kind of pair of large flue control method, and the method for the method and above-described embodiment one is similar, and difference is also to comprise between the step 302 of above-described embodiment 1 and step 303:
Step 304: controlling the alternately upwards two blower fan electric currents that detect simultaneously of two air door of fan apertures, and adjusting throttle opening according to the electric current of two blower fans; Concrete, can realize by following manner, but be not limited to this:
When control two Fans apertures alternately rise, detect two blower fan electric currents, which Fans air door electric current according to two Fans in the described two throttle opening uphill process decides open first or open more: under normal circumstances, air door is opened greatlyr, the blower fan load is larger, the electric current of blower fan is also just larger, but two flues of Double-flue system can influence each other, so in the process of the interleaved air door of two blower fans, the situation that the electric current incomplete equilibrium of two Fans may occur, namely when two air doors are staggered reach certain aperture after, two Fans electric currents are difference to some extent; At this moment, the present embodiment proposes when throttle opening equates, if two blower fan current imbalances, then control throttle opening corresponding to the blower fan that electric current is less compared to the larger air door of fan aperture of electric current some number of degrees that rise more, until the electric current of two blower fans reaches balance, and then the load of balance two blower fans; The less air door of fan aperture of the wherein said electric current step-lengths that rise can be adjusted according to actual conditions more, can not cause in the twin flue air-flow acute variation usually to select 1 degree as principle take each adjusting.
It should be noted that, after adjusting air door, original air balance namely changes in the large flue, usually need certain hour and set up new balance, if thereby the present embodiment proposes electric current at two Fans after the air door adjustment and do not have large variation can think that its balance sets up in the time about 10s, the certainly concrete time can be determined according to actual conditions.
In addition, the embodiment of the invention three proposes on the basis of above-described embodiment one, and this pair large flue control method also can comprise:
Step 305: seriously uneven if there is the load of two Fans in sintering production process, then the air door of two Fans is regulated, make it return in the range of balance after, return to again the production Air Quantity Required, what guarantee to produce carries out smoothly;
Concrete, the load of blower fan is to regulate according to the size of throttle opening, in normal situation, after the air door of fan aperture increased, air quantity increased, the blower fan electric current also increases, corresponding air door load also increases, and if this moment wherein the electric current of a Fans reduce suddenly, then control the air door of its corresponding blower fan opened greatly, in order to increase the suddenly load of the blower fan of minimizing of this electric current, so that reach new balance between two Fans.
In addition, the embodiment of the invention four proposes on the basis of above-described embodiment one, and this pair large flue control method also can comprise:
Step 306: when a Fans electric current sharply reduces, another Fans electric current sharply increases, the air door of the blower fan that sharply reduces of close current then, and open again air door dragging the state of single flue in the current stabilization of another Fans after;
Concrete, in actual production process, sharply reduce if there is a Fans electric current, and the situation that the electric current of another Fans sharply increases the air door after-current perhaps occurs opening and does not increase anti-situation of falling, and this kind situation illustrates that a Fans is just being blown by an other Fans, if open air door this moment, then can make the wind that blows more unobstructed, so that Fans load increases the weight of, the situation of another Fans load reduction also increases the weight of; For this, the present embodiment proposes to close fully the sharply air door of the blower fan of minimizing of load this moment, also be the air door of fan that complete close current sharply reduces, make its current stabilization to no-load current, thereby make the current stabilization of another Fans drag the state of single flue; And then slowly open air door, make it recover normal duty.
It should be noted that, in concrete production operation, if after the adjustment through the various embodiments described above method, if this moment, the electric current of two blower fans did not still reach poised state, then with the air door Close All of two Fans, return to again normal condition execution in step 301, specifically referring to the method step of the various embodiments described above, repeat no more herein.
Can be found out by two large flue control methods that above each embodiment provides, by controlling alternately opening of two air door of fan, so that the air quantity of two Fans alternately rises mutually, until reach the production Air Quantity Required, detect simultaneously the current balance type state of two blower fans, and adjust at any time the aperture of air door of fan according to described current balance type state, thus guaranteed that the energy imbalance of zone of reasonableness does not appear collapsing and exceeding in two Fans in process of production, and improved greatly operating efficiency.
Based on above-mentioned thought, the fifth embodiment of the present invention also provides a kind of system that realizes that the two large flues of sintering machine are regulated, and as shown in Figure 5, comprising: setting unit 501, control module 502 and processing unit 503; Wherein,
Described setting unit 501 is set as blower fan target air quantity in order to will produce Air Quantity Required, and notice is to described control module 502 and processing unit 503;
Described control module 502 is in order to after being provided with the target air quantity in described setting unit 501, and the throttle opening of controlling two Fans alternately rises;
Described processing unit 503 is in order to detecting the air quantity of two Fans, and after described fan delivery reaches the target air quantity that described setting unit 501 arranges, notifies described control module 502 to stop control operation.
Wherein, in the specific implementation, described processing unit 503 also can comprise: acquisition module and detection module; Wherein, described acquisition module is used for utilizing fan delivery and the proportionate relationship of blower fan electric current to obtain blower fan electric current corresponding to production Air Quantity Required; Described detection module is for detection of the blower fan electric current, and reached when producing blower fan electric current corresponding to Air Quantity Required when described blower fan electric current, notifies described control module 502 to stop control operation.
In addition, the system that the two large flues of above-mentioned realization sintering machine are regulated also can comprise: adjustment unit, be used for detecting two blower fan electric currents, and adjusting throttle opening according to the electric current of two blower fans in the alternately upwards while of throttle opening of described control module 502 controls two Fans.
Based on the system of the various embodiments described above, in order to process the unbalanced phenomenon of two blower fans that occurs in process of production, this system also can comprise: for detection of the balancing unit of two blower fan electric currents;
When wherein the electric current of a Fans reduced suddenly, described balancing unit notified described control module 502 that the air door of its corresponding blower fan is opened greatly, until the electric current between two Fans reaches new balance; Sharply reduce and work as a Fans electric current, when another Fans electric current sharply increases, described balancing unit is notified the air door of the blower fan that described control module close current sharply reduces, and notifies described control module to open its air door dragging the state of single flue in the current stabilization of another Fans after.
To the above-mentioned explanation of the disclosed embodiments, make this area professional and technical personnel can realize or use the embodiment of the invention.Multiple modification to these embodiment will be apparent concerning those skilled in the art, and General Principle as defined herein can in the situation of the spirit or scope that do not break away from the embodiment of the invention, realize in other embodiments.Therefore, the embodiment of the invention will can not be restricted to these embodiment shown in this article, but will meet the widest scope consistent with principle disclosed herein and features of novelty.
Above-described embodiment of the present invention does not consist of the restriction to protection domain of the present invention.Any modification of doing within the spirit and principles in the present invention, be equal to and replace and improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a method that realizes that the two large flues of sintering machine are regulated is characterized in that, comprising:
The target air quantity of default blower fan is for producing Air Quantity Required;
The throttle opening of controlling two Fans replaces stepping and rises;
After reaching the target air quantity, two Fans stop control operation;
Detect two blower fan electric currents, if wherein the electric current of a Fans reduces suddenly, then the air door of its corresponding blower fan is opened greatly, until the electric current between two Fans reaches new balance.
2. method according to claim 1 is characterized in that, comes in the following manner to determine whether current fan delivery reaches the target air quantity:
Utilize fan delivery and the proportionate relationship of blower fan electric current to obtain and produce blower fan electric current corresponding to Air Quantity Required;
Detect the blower fan electric current, when described blower fan electric current has reached when producing blower fan electric current corresponding to Air Quantity Required, determine that current fan delivery is the target air quantity.
3. method according to claim 1 is characterized in that, the method also comprises:
When control two air door of fan apertures replace the stepping rising, detect two blower fan electric currents, and adjust throttle opening according to the electric current of two blower fans.
4. to go 3 described methods according to right, it is characterized in that, describedly adjust throttle opening according to two blower fan electric currents and comprise:
When two air door of fan apertures equated, if two blower fan current imbalances, the throttle opening that then blower fan that electric current is less is corresponding compared to the larger air door of fan aperture of electric current some number of degrees that rise, until the electric current of two blower fans reaches balance more; The air door of fan aperture that wherein said electric current the is less step-lengths that rise are 1 degree more.
5. method according to claim 1 is characterized in that, the method also comprises:
Detect two blower fan electric currents, if a Fans electric current sharply reduces, and another Fans electric current sharply increases, the air door of the blower fan that sharply reduces of close current then, and open again air door dragging the state of single flue in the current stabilization of another Fans after.
6. method according to claim 1 or 5 is characterized in that, the method also comprises:
If two blower fan electric currents still do not reach poised state after adjusting, then with two Fans air door Close Alls, carry out again regulating step.
7. according to claim 1 to the described method of 5 any one, it is characterized in that:
The step-length that the throttle opening of described two Fans replaces the stepping rising is 1 degree.
8. a system that realizes that the two large flues of sintering machine are regulated is characterized in that, comprising: setting unit, control module, processing unit and balancing unit; Wherein,
Described setting unit is set as blower fan target air quantity in order to will produce Air Quantity Required, and notice is to described control module and processing unit;
Described control module is in order to after being provided with the target air quantity in described setting unit, and the throttle opening of controlling two Fans replaces stepping and rises;
Described processing unit is in order to detecting the air quantity of two Fans, and after described fan delivery reaches the target air quantity that described setting unit arranges, notifies described control module to stop control operation;
Described balancing unit is in order to detecting two blower fan electric currents, and when wherein the electric current of a Fans reduces suddenly, notifies described control module that the air door of its corresponding blower fan is opened greatly, until the electric current between two Fans reaches new balance.
9. system according to claim 8 is characterized in that, described processing unit comprises: acquisition module and detection module; Wherein,
Described acquisition module is used for utilizing fan delivery and the proportionate relationship of blower fan electric current to obtain blower fan electric current corresponding to production Air Quantity Required;
Described detection module is for detection of the blower fan electric current, and reached when producing blower fan electric current corresponding to Air Quantity Required when described blower fan electric current, notifies described control module to stop control operation.
10. system according to claim 8, it is characterized in that, this system also comprises: adjustment unit is used for replacing when stepping rises at the throttle opening that described control module is controlled two Fans, detect two blower fan electric currents, and adjust throttle opening according to the electric current of two blower fans.
11. system according to claim 8, it is characterized in that, this system also comprises: balancing unit, also be used for sharply reducing when a Fans electric current, and another Fans electric current is when sharply increasing, notify the air door of the blower fan that described control module close current sharply reduces, and notify described control module to open its air door dragging the state of single flue in the current stabilization of another Fans after.
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| CN 200910178550 CN102032786B (en) | 2009-09-29 | 2009-09-29 | Method and system for adjusting two large flues of sintering machine |
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| CN102914166B (en) * | 2011-08-03 | 2015-01-14 | 山东省冶金设计院股份有限公司 | Method for guaranteeing hot air flow penetrating through sintering ore layer |
| CN103033050B (en) * | 2012-12-27 | 2014-06-18 | 中冶长天国际工程有限责任公司 | Frequency conversion control method and frequency conversion control system for main exhaust fan of sintering system |
| CN103363804B (en) * | 2013-07-29 | 2014-11-26 | 中冶长天国际工程有限责任公司 | Method and system for controlling flow of sintering ignition furnace |
| CN103673615B (en) * | 2013-12-26 | 2015-07-29 | 中冶长天国际工程有限责任公司 | A kind of main exhauster power-economizing method and device |
| CN107747555B (en) * | 2017-10-17 | 2021-08-31 | 珠海格力电器股份有限公司 | Fan control method, controller, control device, wall-mounted furnace and gas water heater |
| CN107588031B (en) * | 2017-10-24 | 2019-03-01 | 西安热工研究院有限公司 | A kind of online dynamic switching method of power station Axial Fan with Adjustable Vanes revolving speed |
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