CN101581939B - Method and system for monitoring fuel ratio of blast furnace in real time - Google Patents
Method and system for monitoring fuel ratio of blast furnace in real time Download PDFInfo
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- CN101581939B CN101581939B CN2009100158508A CN200910015850A CN101581939B CN 101581939 B CN101581939 B CN 101581939B CN 2009100158508 A CN2009100158508 A CN 2009100158508A CN 200910015850 A CN200910015850 A CN 200910015850A CN 101581939 B CN101581939 B CN 101581939B
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Abstract
The invention discloses a method and a system for monitoring the fuel ratio of a blast furnace in real time, which is characterized in that: the method comprises the following steps: (1) calculating amonitoring value of Si content in molten iron of the current heat and inputting the monitoring value to a computer; (2) calculating a control value RLB of the fuel ratio by a fuel ratio calculation m odule; (3) obtaining a detection value Ls of a baiting speed; (4) inputting the control value RLB of the fuel ratio, a detection value K of coke ratio and the detection value Ls of the baiting speed to a calculation module of a coal injection speed for calculation, and outputting a control value M of the coal injection speed; and (5) inputting the control value of the coal injection speed to an industrial control computer; and issuing a command of coal injection amount to coal injection control equipment of the blast furnace according to the control value of the coal injection speed. The method and the system simulate the operating thinking of a blast furnace operator through the computer, standardize the operating action of the operator, reduce the operating randomness varying from personto person and reduce the failure rate of the operator to the maximum extent.
Description
Technical field
The present invention relates to the blast furnace operating control technology, specifically, relate to a kind of to blast furnace fuel than the method and system of monitoring in real time.
Background technology
Blast furnace is a kind of high-pressure sealed reaction vessel that iron can be restored from iron ore, keeps required reductive agent of its reduction reaction and origin of heat and mainly comes from coke and coal dust.Smelting one ton of amount of coke that the pig iron consumed is coke ratio, and smelting one ton of coal dust amount that the pig iron consumed is the coal ratio, and coal adds up to the blast furnace fuel ratio than with coke ratio, and unit is kg/t.Blast furnace fuel is than the important economic and technical norms of utilizing level for the high capacity of furnace of measurement.
Furnace temperature ([Si] content in the molten iron, the % of unit, weight ratio) control is blast furnace operating person's an important control content, the person is controlled at fuel ratio in the suitable scope according to the working of a furnace to need the blast furnace operating, to keep furnace temperature big deviation does not take place.Natural fuel changes than changing with the material speed and the working of a furnace in the operation of blast furnace process, needs the operator in time to catch this variation, and keeps natural fuel than in reasonable range by increasing and reduce coal powder injection speed.This work is very difficult operation concerning the operator, and outstanding and veteran blast furnace operating person can select to make suitable opportunity suitable coal powder injection speed adjustment according to furnace temperature basis, furnace temperature development trend, the fast speed of material.But the height of its controlling level depends on operator's operative skill, need the accumulation of operating experience for many years, so everyone accomplishes that this point is unusual something of difficulty the person that requires the blast furnace operating, especially those are rigidly connected the technician who touches the blast furnace practical operation, need a very long study accumulative process.
Control fuel ratio main difficulty concerning the operator has three each side: the one, and the calculating of material speed and fuel ratio is inaccurate, untimely; The 2nd, best opportunity that injecting coal quantity is adjusted and the bad grasp of degree; The 3rd, the operation between the different operating personnel of teams and groups is connected poor consistency.Common solution is training and the performance appraisal of strengthening operating personnel's operative skill, improving its operative skill and sense of responsibility, but often because people's individual difference causes problem to be difficult to solve.
Summary of the invention
The technical matters that the present invention mainly solves provide a kind of utilize computing machine come the simulated operator thinking to blast furnace fuel than the method and system of carrying out real time and on line monitoring.
The present invention adopts following technological means to realize goal of the invention:
(1) calculates [Si] content monitor value in this heat molten iron, the input computing machine;
(2) utilize the fuel ratio computing module to calculate fuel ratio controlling value RLB, the operator sets fuel ratio upper control limit RLB according to working of a furnace needs
MaxWith lower control limit RLB
MinThe operator preestablishes the control interval of molten iron [Si], determine the Control for Kiln Temperature interval according to [Si] content monitor value, computing machine compares [Si] content monitor value in this heat [Si] content monitor value and the last heat molten iron, infer and furnace temperature trend, calculate according to Control for Kiln Temperature interval and furnace temperature trend, obtain fuel ratio controlling value RLB;
(3) obtain blanking velocity detected value Ls;
(4) fuel ratio controlling value RLB, coke ratio detected value K and blanking velocity detected value Ls input coal powder injection speed calculation module are calculated output coal powder injection speed control value M;
(5) industrial control computer is assigned the injecting coal quantity instruction according to coal powder injection speed control value to the pulverized coal injection opertaing device.
As to further restriction of the present invention, step (3) may further comprise the steps:
(3.1) amount of the tapping a blast furnace T of the every batch of material of acquisition;
(3.2) the every batch of material of the COMPUTER DETECTION used time t of preceding n (8≤n≤16) batch of material that packs into;
(3.3) current blanking velocity Ls=T*n/t.
As to further restriction of the present invention, the boundary value in described Control for Kiln Temperature interval can be adjusted according to actual conditions of blast furnace.
As to further restriction of the present invention, coke ratio detected value K is a constant, by manual typing.
A kind of to blast furnace fuel than the system that monitors in real time, comprise industrial control computer and with it communication the bookkeeping computing machine, it is characterized in that described bookkeeping computing machine is provided with:
[Si] content monitor value load module: molten iron [Si] the content monitor value that receives manual typing or Network Transmission;
The fuel ratio computing module: the operator sets fuel ratio upper control limit RLB according to working of a furnace needs
MaxWith lower control limit RLB
MinThe operator preestablishes the control interval of molten iron [Si], determine the Control for Kiln Temperature interval according to [Si] content monitor value, computing machine compares [Si] content monitor value in this heat [Si] content monitor value and the last heat molten iron, infer and furnace temperature trend, calculate according to Control for Kiln Temperature interval and furnace temperature trend, obtain fuel ratio controlling value RLB;
The blanking velocity computing module: computing machine obtains the amount of the tapping a blast furnace T of every batch of material, detect every batch of material pack into before the used time t of n batch of material, calculate current blanking velocity Ls=T*n/t;
The coal powder injection speed calculation module: based on fuel calculates coal powder injection speed M than controlling value RLB, coke ratio detected value K and blanking velocity Ls.
Compared with prior art, advantage of the present invention and good effect are: the present invention is by the variation of computer real-time monitoring blast furnace blanking velocity, with hour injecting coal quantity is Main Control Elements, in time adapt to the variation of the material speed and the working of a furnace by control coal powder injection speed, it is constant to keep fuel ratio, provide a unified operation scale to the operator, solved not high because of operator's technical ability, lack a sense of responsibility and cause in control furnace temperature process the coal amount to adjust untimely, disunity, the difficult technical barrier that quantizes.The present invention suits on-the-spot practical operation very much, and by computer simulation blast furnace operating person's operational cognition, standard operation person's operation behavior reduces the operation randomness that varies with each individual, and as much as possible reduces operator's fault rate.Use this method,, reduce blast furnace fuel consumption and played positive effect improving the smooth operation of furnace index.
Description of drawings
Fig. 1 is the system flowchart of the preferred embodiment of the present invention.
Fig. 2 is the structured flowchart of the preferred embodiment of the present invention.
Embodiment
Below in conjunction with accompanying drawing and preferred embodiment the present invention is done further to describe in detail.
Referring to Fig. 1, step S1, operator calculate molten iron [Si] content detection value, and before the end of tapping a blast furnace, pass through artificial or network input manager operational computations machine, can adopt fluorescence detector to detect [Si] content, also can adopt other known technology, not repeat them here.Step S2, operator according to working of a furnace needs with fuel ratio upper control limit RLB
MaxWith lower control limit RLB
MinInput manager operational computations machine, and calculate RLB
Suitable=(RLB
Max+ RLB
Min)/2.Step S3, determine the Control for Kiln Temperature interval, the operator is preset as five control intervals with molten iron [Si] in computing machine, [Si]＜0.4% is defined as " low ", 0.4%≤[Si]＜0.5% is defined as " lower limit ", and 0.5%≤[Si]＜0.6% is defined as " suitable ", and 0.6%≤[Si]＜0.7% is defined as " upper limit ", 〉=0.7% is defined as " height ", and the operator can make amendment to the boundary value of five control intervals according to the actual working of a furnace of blast furnace.Step S4, infer furnace temperature trend, computing machine compares this heat molten iron [Si] content detection value and last heat molten iron [Si] content detection value, difference is " keeping " ± 0.05% with interior definition furnace temperature trend, greater than+0.05% definition furnace temperature trend is " up ", is lower than-0.05% definition furnace temperature trend and is " descending ".Step S5, computing fuel are than controlling value, according to Control for Kiln Temperature interval, furnace temperature trend and fuel ratio upper control limit RLB
Max, lower limit RLB
Min, RLB
SuitableTable look-up 1 computing fuel than controlling value RLB.
Table 1
Step S6, obtain blanking velocity detected value Ls, whenever pack into the amount of tapping a blast furnace of a batch of material of blast furnace is T (unit: ton/batch), utilize the every batch of material of the COMPUTER DETECTION used time t of preceding n (8≤n≤16) batch of material (unit: hour) that packs into, then current material speed Ls=T * n/t (unit: ton/hour), blast furnace meets when blow-on recovers after the situations such as blowing out or damping down, the general manually control pulverized coal injection speed that adopts, after blast furnace enters a kind of state relatively stably, in order to control blast furnace better, adopt computer-controlled blast coal powder injection speed, before switching to computer control, the data of n batch of material have existed in the middle of the computer system.Step S7 calculates coal powder injection speed control value M, and according to operation coke ratio K, current blanking velocity Ls, the fuel ratio controlling value RLB calculating coal powder injection speed control value of manual input, formula is: M=(RLB-K) * Ls, (unit; Ton/hour).Step S8 sends to on-the-spot pulverized coal injection opertaing device with the coal powder injection speed command by industrial computer, adjusts injecting coal quantity according to the coal powder injection speed command, thereby realizes online fuel ratio control.Step S9 after the monitoring of blast furnace one batch material is finished, judges whether that raw material is smelted in addition, if having, enters the monitoring of next batch according to above-mentioned steps, if do not have, then iron charge is smelted and finished.
Referring to Fig. 2, a kind of to blast furnace fuel than the system that monitors in real time, comprise industrial control computer and with it communication the bookkeeping computing machine, described bookkeeping computing machine is provided with:
[Si] content monitor value load module: molten iron [Si] the content monitor value that receives manual typing or Network Transmission;
The fuel ratio computing module: the operator sets fuel ratio upper control limit RLB according to working of a furnace needs
MaxWith lower control limit RLB
MinThe operator preestablishes the control interval of molten iron [Si], determine the Control for Kiln Temperature interval according to [Si] content monitor value, computing machine compares [Si] content monitor value in this heat [Si] content monitor value and the last heat molten iron, infer and furnace temperature trend, calculate according to Control for Kiln Temperature interval and furnace temperature trend, obtain fuel ratio controlling value RLB;
The blanking velocity computing module: computing machine obtains the amount of the tapping a blast furnace T of every batch of material, detect every batch of material pack into before the used time t of n batch of material, calculate current blanking velocity Ls=T*n/t;
The coal powder injection speed calculation module: based on fuel calculates coal powder injection speed M than controlling value RLB, coke ratio detected value K and blanking velocity Ls.
Certainly, above-mentioned explanation is not a limitation of the present invention, and the present invention also is not limited only to above-mentioned giving an example, and variation, remodeling, interpolation or replacement that those skilled in the art are made in essential scope of the present invention also belong to protection scope of the present invention.
Claims (5)
- One kind to blast furnace fuel than the method for monitoring in real time, it is characterized in that, may further comprise the steps:(1) calculates [Si] content monitor value in this heat molten iron, the input computing machine;(2) utilize the fuel ratio computing module to calculate fuel ratio controlling value RLB, the operator sets fuel ratio upper control limit RLB according to working of a furnace needs MaxWith lower control limit RLB MinThe operator preestablishes the control interval of molten iron [Si], determine the Control for Kiln Temperature interval according to [Si] content monitor value, computing machine compares [Si] content monitor value in this heat [Si] content monitor value and the last heat molten iron, infer and furnace temperature trend, calculate according to Control for Kiln Temperature interval and furnace temperature trend, obtain fuel ratio controlling value RLB;(3) obtain blanking velocity detected value Ls;(4) fuel ratio controlling value RLB, coke ratio detected value K and blanking velocity detected value Ls input coal powder injection speed calculation module are calculated output coal powder injection speed control value M;(5) industrial control computer is assigned the injecting coal quantity instruction according to coal powder injection speed control value to the pulverized coal injection opertaing device.
- According to claim 1 described to blast furnace fuel than the method for monitoring in real time, it is characterized in that step (3) may further comprise the steps:(3.1) amount of the tapping a blast furnace T of the every batch of material of acquisition;(3.2) the used time t of n batch of material before the every batch of material of COMPUTER DETECTION is packed into;(3.3) current blanking velocity Ls=T*n/t.
- According to claim 1 described to blast furnace fuel than the method for monitoring in real time, it is characterized in that the boundary value in described Control for Kiln Temperature interval can be adjusted according to actual conditions of blast furnace.
- According to claim 1 described to blast furnace fuel than the method for monitoring in real time, it is characterized in that coke ratio detected value K is a constant, by manual typing.
- One kind to blast furnace fuel than the system that monitors in real time, comprise industrial control computer and with it communication the bookkeeping computing machine, it is characterized in that described bookkeeping computing machine is provided with:[Si] content monitor value load module: molten iron [Si] the content monitor value that receives manual typing or Network Transmission;The fuel ratio computing module: the operator sets fuel ratio upper control limit RLB according to working of a furnace needs MaxWith lower control limit RLB MinThe operator preestablishes the control interval of molten iron [Si], determine the Control for Kiln Temperature interval according to [Si] content monitor value, computing machine compares [Si] content monitor value in this heat [Si] content monitor value and the last heat molten iron, infer and furnace temperature trend, calculate according to Control for Kiln Temperature interval and furnace temperature trend, obtain fuel ratio controlling value RLB;The blanking velocity computing module: computing machine obtains the amount of the tapping a blast furnace T of every batch of material, detect every batch of material pack into before the used time t of n batch of material, calculate current blanking velocity Ls=T*n/t;The coal powder injection speed calculation module: based on fuel calculates coal powder injection speed M than controlling value RLB, coke ratio detected value K and blanking velocity Ls.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009100158508A CN101581939B (en) | 2009-05-31 | 2009-05-31 | Method and system for monitoring fuel ratio of blast furnace in real time |
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| CN101581939B true CN101581939B (en) | 2010-12-29 |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN101916080B (en) * | 2010-07-15 | 2011-12-28 | 首钢总公司 | System and method thereof for carrying out real-time online calculation on titanium balance of blast furnace |
| CN101989089B (en) * | 2010-12-01 | 2012-09-26 | 中冶南方(武汉)威仕工业炉有限公司 | On-line assessment method of slab heating furnace process capability |
| CN104232820B (en) * | 2013-06-14 | 2015-12-02 | 山西太钢不锈钢股份有限公司 | A kind of coal powder injection setting optimization method calculated based on blast furnace blanking material speed difference |
| CN108060281B (en) * | 2017-12-04 | 2019-08-23 | 山西太钢不锈钢股份有限公司 | A kind of method of blast furnace drop furnace temperature |
| CN112270437A (en) * | 2020-10-27 | 2021-01-26 | 山东莱钢永锋钢铁有限公司 | Blast furnace fuel ratio early warning method |
| CN114959130A (en) * | 2022-04-25 | 2022-08-30 | 青岛恒拓环保科技有限公司 | Buggy intelligent control furnace temperature system |
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