CN105400915A - Method and system for quantitatively evaluating distribution of gas flows on blast furnace top - Google Patents
Method and system for quantitatively evaluating distribution of gas flows on blast furnace top Download PDFInfo
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- CN105400915A CN105400915A CN201511008241.1A CN201511008241A CN105400915A CN 105400915 A CN105400915 A CN 105400915A CN 201511008241 A CN201511008241 A CN 201511008241A CN 105400915 A CN105400915 A CN 105400915A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B5/00—Making pig-iron in the blast furnace
- C21B5/006—Automatically controlling the process
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Abstract
The invention provides a method and system for quantitatively evaluating the distribution of gas flows on a blast furnace top. The method comprises the following steps: step 1, collecting the gas temperature and the flow speed parameters of all measuring points arranged on the blast furnace top; step 2, establishing a radial distribution model of a furnace top area according to the quantity and the radial distribution of the measuring points, and determining the center area, the middle area and the edge area of gas distribution of the furnace top area; step 3, respectively calculating the quantitative characterization parameters of gas flows of the center area, the middle area and the edge area of gas distribution of the furnace top area; step 4, according to the quantitative characterization parameters of gas flows obtained by all the areas, calculating the evaluation indexes of gas flow distribution of all the areas; step 5, according to the obtained evaluation indexes of gas flow distribution of all the areas of the blast furnace top, quantitatively evaluating the distribution of gas flows. The method solves the problem brought by the fact that blast furnace operators judge the radial distribution strength of the gas flows on the furnace top only according to experience and furnace top measurement data, and therefore the level of blast furnace operation and adjustment is improved.
Description
Technical field
The present invention relates to aided control technology field in blast furnace ironmaking, particularly relate to a kind of method and system of quantitative evaluation top gas flow point cloth.
Background technology
At high furnace interior, from inlet horizontal line until furnace roof is a round table-like black box that there is many physical-chemical reactions, between the Gas Flow upwards flowed and the bed of material moved downward, form move toward one another.In process of production, carrying out adjusting and controlling for gas fluid distrbution in stove, is the important content of blast furnace regular job.Whether gas stream in the stove distribution is smooth and easy, reasonable, has very important impact to blast fumance efficiency, meanwhile, is also the key improving pig iron production capacity, reduce fuel consumption, extend blast furnace campaign.If unreasonable to the control of gas stream in the stove distribution, every production and technical indication of blast furnace will be greatly affected, so that cannot remain stable, produces normally, also can cause negative consequence to prolonging campaign.
In modern blast furnace is built, in order to detect the distribution situation of Gas Flow in stove in time, the temperature and speed measuring devices such as furnace roof cross temperature and infrared photography are installed usually, in conjunction with other proofing units in shaft region, to carry out stock gas stream distributed monitoring.But, in most of blast furnace operating reality, all also just carry out rough qualitative judgement based on section chief's experience and detection data when carrying out gas flow optimized, lack effective quantitative evaluation and comprehensive evaluation means.By the detection data of integrated application furnace roof measuring apparatus, carry out the quantitative evaluation of top gas flow point cloth, so that better in conjunction with itself and the relation between roof material distributing, blowing system etc., more direct gas flow optimized and working of a furnace basis for estimation can be provided for blast furnace operating person, in blast furnace operating, determine corresponding controling parameters, keep the stable of blast furnace operating and direct motion.
But, the evaluation method of existing gas fluid in blast furnace distribution is merely using gas velocity or gas flow as the Appreciation gist of air flow method, do not take into full account the contribution that each zoning Gas Flow produces stock gas overall heat level and impact, be difficult to truly, reflect exactly the distribution situation of stock gas stream.
Summary of the invention
The shortcoming of prior art in view of the above, the object of the present invention is to provide a kind of method and system of quantitative evaluation top gas flow point cloth, for solving in prior art gas fluid in blast furnace Evaluation on distribution merely using gas velocity or gas flow as air flow method Appreciation gist, the problem of furnace roof gas fluid distrbution cannot be reacted really and accurately.
For achieving the above object and other relevant objects, the invention provides a kind of method of quantitative evaluation top gas flow point cloth, comprising:
Step one, the gas temperature parameter of capture setting each measurement point on described blast furnace roof and gas speed parameter;
Step 2, sets up the radial distribution model in furnace roof region, determines the central zone of described furnace roof region gas flow distribution, region intermediate and fringe region according to the quantity of described measurement point and its radial distribution;
Step 3, according to gas temperature parameter and the gas speed parameter of each measurement point, calculates the central zone of furnace roof region gas flow distribution respectively, the Gas Flow of region intermediate and fringe region quantizes characterization parameter;
Step 4, quantizes according to the Gas Flow of each region gained the gas fluid distrbution evaluation number that characterization parameter calculates each region;
Step 5, according to calculating the blast furnace roof of gained in the gas fluid distrbution evaluation number in each region, carries out quantitative evaluation to described gas fluid distrbution.
Another object of the present invention is to a kind of system of quantitative evaluation top gas flow point cloth, comprising:
Data acquisition module, is suitable for by OPC technology, the gas temperature parameter of capture setting in blast furnace roof temperature and speed measuring device measured by each measurement point and gas speed parameter;
Data memory module, is suitable for, by the gas temperature parameter of collection and gas speed parameter, being stored into the database on database server, being also suitable for all data stored in management database;
Data preprocessing module, is suitable for based on expertise, rejects the abnormal data in the gas temperature and gas speed gathered, and carries out completion in conjunction with the historical data of each measurement point and neighboring area data to the data rejected;
Model computation module, be suitable for the gas temperature parameter that gathers according to blast furnace roof temperature and speed measuring device and gas speed parameter and configuration parameter, calculate stock gas distribution center region, the Gas Flow of region intermediate and fringe region quantizes characterization parameter, and quantize based on calculating gained Gas Flow the gas fluid distrbution evaluation number that characterization parameter correspondence calculates stock gas distribution center region, region intermediate and fringe region;
Output control module, be suitable for the output mode according to arranging, extract from database calculate obtain stock gas distribution center region, region intermediate and fringe region gas fluid distrbution evaluation number, correspondingly in the mode of cake chart, trend map or Model Diagnosis, gas fluid distrbution evaluation number is shown.
As mentioned above, the method and system of quantitative evaluation top gas flow point cloth of the present invention, have following beneficial effect:
The present invention is by obtaining gas temperature parameter and the gas speed parameter of each measurement point on described blast furnace roof, the radial distribution model in furnace roof region is set up according to the quantity of measurement point and its radial distribution, according to radial distribution model determination top gas stream center, region intermediate and fringe region, calculate its Gas Flow respectively and quantize characterization parameter and gas fluid distrbution evaluation number, thus quantitatively evaluating is carried out to top gas distribution, avoid simple using gas velocity or gas flow as the drawback of air flow method Appreciation gist, solve blast furnace operating personnel and only rule of thumb simply pass judgment on the strong and weak and problem brought of stock gas stream radial distribution with furnace roof take off data, react the problem of furnace roof gas fluid distrbution truely and accurately, thus improve the level of blast furnace operating adjustment.
Accompanying drawing explanation
Fig. 1 is shown as the method flow diagram of quantitative evaluation top gas flow point cloth of the present invention;
Fig. 2 is shown as blast furnace roof cross temperature speed measuring device schematic diagram of the present invention;
Fig. 3 is shown as the system construction drawing of quantitative evaluation top gas flow point cloth of the present invention;
Fig. 4 is shown as the system interface display sectional drawing of blast furnace quantitative evaluation top gas flow point cloth of the present invention;
Fig. 5 is shown as the system program schema of quantitative evaluation top gas flow point cloth of the present invention.
Element numbers explanation
11 cantilever temperature and speed measuring bars
12 measurement point
13 central circular regions
14 annular sections
30 blast furnace production process
31OPC communication interface
32 data acquisition modules
33 data memory modules
34 data preprocessing module
35 model computation module
36 output control modules
S1 ~ S5 step one is to step 5
Embodiment
Below by way of specific specific examples, embodiments of the present invention are described, those skilled in the art the content disclosed by this specification sheets can understand other advantages of the present invention and effect easily.The present invention can also be implemented or be applied by embodiments different in addition, and the every details in this specification sheets also can based on different viewpoints and application, carries out various modification or change not deviating under spirit of the present invention.It should be noted that, when not conflicting, the feature in following examples and embodiment can combine mutually.
It should be noted that, the diagram provided in following examples only illustrates basic conception of the present invention in a schematic way, then only the assembly relevant with the present invention is shown in graphic but not component count, shape and size when implementing according to reality is drawn, it is actual when implementing, and the kenel of each assembly, quantity and ratio can be a kind of change arbitrarily, and its assembly layout kenel also may be more complicated.
Embodiment one
Refer to Fig. 1, the invention provides a kind of method flow diagram of quantitative evaluation top gas flow point cloth, comprising:
In step S101, the gas temperature parameter of capture setting each measurement point on described blast furnace roof and gas speed parameter;
Wherein, described blast furnace roof is provided with temperature and speed measuring device, the cantilever temperature and speed measuring bar that described temperature and speed measuring device is long by one and M root is short forms (altogether M+1 root cantilever temperature and speed measuring bar), perpendicular to furnace throat sidewall, the cantilever temperature and speed measuring bar that M+1 root is equal angular direction is installed by flange at blast furnace throat position, wherein, short cantilever temperature and speed measuring bar is provided with N number of measurement point, and long cantilever temperature and speed measuring bar is provided with N+1 measurement point, and M, N are the natural number being less than 10.
Described temperature and speed measuring device is a long how short cantilever temperature and speed measuring bar composition, relative to the cross temperature speed measuring device of entirety, is more beneficial to installation and maintenance; Meanwhile, the cantilever temperature and speed measuring bar in equal angular direction is set, makes whole cantilever temperature and speed measuring bar be in uniform height and level, improve image data accuracy, and long cantilever temperature and speed measuring bar is set to center measurement point near blast furnace roof center.
Particularly, described measurement point, is arranged on cantilever temperature and speed measuring bar that M+1 root is equal angular direction, and on every root cantilever temperature and speed measuring bar numbering to be all the measurement point of J equal with the radial distance of center measurement point, wherein, J=1,2 ... N;
Described center measurement point is the measurement point of close blast furnace central position set on long cantilever temperature and speed measuring bar;
Described measurement point is installed armoured thermocouple and coal gas respectively and to be tested the speed galvanic couple, correspondingly respectively measures gas temperature and gas speed parameter.
In the present embodiment, carry out multi-point data acquisition by temperature and speed measuring device, can reach and the radial parameter distribution of blast furnace throat Gas Flow to be measured and the object controlled more comprehensively.
In step s 102, set up the radial distribution model in furnace roof region according to the quantity of described measurement point and its radial distribution, determine the central zone of described furnace roof region gas flow distribution, region intermediate and fringe region;
Wherein, described radial distribution model, is divided into furnace roof temperature and speed measuring device center measurement point be the center of circle a central circular and N number of annular section by blast furnace throat by radial direction;
Described central circular and annular section, wherein, position, outermost layer annular section edge is determined by blast furnace throat internal diameter, and central circular and all the other positions, annular section edge are then determined by the ring cross-section center of gravity place annulus of place annulus between adjacent measurement points;
Described ring cross-section center of gravity place annulus is the determined annulus of centroid of section radius of place annulus between two adjacent groups measurement point in blast furnace throat radial direction.
In the present embodiment, by blast furnace roof is divided into multiple region, can reaches and the object that subregion calculates separately is carried out to the Gas Flow level in each region.
In step s 103, according to gas temperature parameter and the gas speed parameter of each measurement point, calculate the central zone of furnace roof region gas flow distribution respectively, the Gas Flow of region intermediate and fringe region quantizes characterization parameter;
Wherein, described stock gas distribution center region, region intermediate, fringe region Gas Flow quantize characterization parameter, are expressed as Q
center, Q
middle, Q
edge, calculated by following formula:
Wherein, Z represents " " center ", " centre ", " edge " respectively;
Described region gas temperature, is calculated by comprising all measurement point gas temperature observed values in region by pre-treatment and arithmetical mean and is obtained;
Described region gas speed, by comprising all measurement point gas velocity observed values in region or calculated value is calculated by pre-treatment and arithmetical mean and obtained;
Described furnace top gas temperature, is calculated by pre-treatment and arithmetical mean by stock gas upcast measured temperature;
Described stock gas flow velocity, the ratio according to furnace top coal quantity and furnace throat area is determined;
Described furnace top coal quantity, calculated by gas flowrate in bosh × (1+r), wherein r is for affect by chemical reaction process in State of Blast Furnace, the per-cent that furnace top coal quantity increases compared to gas flowrate in bosh.
Stock gas quantizing characterization parameter central zone Q can be calculated by above-mentioned formula
center, region intermediate Q
middle, fringe region Q
edge.
In the present embodiment, stock gas distribution center region, region intermediate, fringe region Gas Flow quantize characterization parameter and all can calculate, and quantizing characterization parameter, can reach the object of gas fluid distrbution level being carried out to subregion quantitative Analysis by calculating Gas Flow.
In step S104, quantize according to the Gas Flow of each region gained the gas fluid distrbution evaluation number that characterization parameter calculates each region;
Wherein, described stock gas distribution center region, region intermediate, fringe region gas fluid distrbution evaluation number, be expressed as I
center, I
middle, I
edge, calculated by following formula:
I
z=Q
z/ (Q
center+ Q
middle+ Q
edge)
Wherein, Z represents " " center ", " centre ", " edge " respectively.
In the present embodiment, the gas fluid distrbution evaluation number of accurate calculation regional, can reach the object of gas fluid distrbution each region relative level being carried out to quantitatively evaluating.
In step S105, according to calculating the blast furnace roof of gained in the gas fluid distrbution evaluation number in each region, quantitative evaluation is carried out to described gas fluid distrbution.
By presetting the management threshold value of top gas flow point cloth central zone, region intermediate and fringe region, the real-time calculation result of gas fluid distrbution is evaluated, export gas flow distribution central zone, top, region intermediate, fringe region gas fluid distrbution evaluation number, operator are according to the management threshold value preset and real-time gas fluid distrbution evaluation number, blast furnace operating is adjusted, the stability of conditions of blast furnace can be improved, and improve the gas utilization rate of blast fumance.
Embodiment two
Blast furnace roof region, comprises the installation of furnace throat cross temperature speed measuring device and Gas Flow passes the bed of material upwards by region, as shown in Figure 2, is blast furnace roof cross temperature speed measuring device schematic diagram of the present invention.
At certain iron work 4800m
3on blast furnace, furnace throat region, furnace roof position is provided with cross temperature speed measuring device, include thief rod 11, i.e. long three short (adding up to four) cantilever temperature and speed measuring bar, at blast furnace throat position, four thief rods are that flange at right angle setting is passed through in 90 ° of directions, are in northeast, the southeast, southwest, northwest four direction respectively.Each thief rod is provided with measurement point 12, three short cantilever temperature and speed measuring bars is respectively arranged with 6 measurement point, number from outside to inside along blast furnace throat radial direction and be expressed as 1 successively, 2,3 ..., 6; The cantilever temperature and speed measuring bar that another root is long is provided with 7 measurement point, numbers from outside to inside along blast furnace throat radial direction and can be expressed as 1 successively, 2,3 ..., the 6,7, the 7th measurement point position be blast furnace throat radial center.In four mutually perpendicular directions, four measurement point that numbering is J are equal with the radial distance of blast furnace throat center measurement point (being numbered the measurement point of 7), J=1, and 2 ..., 6.
Embodiment three
For embodiment a certain amount of evaluation top gas stream location mode detail flowchart, it specifically comprises:
Step one, the gas temperature parameter of capture setting each measurement point on described blast furnace roof and gas speed parameter;
Wherein, described gas temperature, is obtained by the armoured thermocouple measurement be arranged on each measurement point position, and in four mutually perpendicular directions, four groups of gas temperature observed values are expressed as: T
nE, 1, T
nE, 2..., T
nE, 6, T
7; T
sE, 1, T
sE, 2..., T
sE, 6; T
sW, 1, T
sW, 2..., T
sW, 6; T
nW, 1, T
nW, 2..., T
nW, 6.The unit of each gas temperature observed value is DEG C, wherein, and T
7centered by the gas temperature of measurement point.
Described gas speed, according to each measurement point position solid-parameter such as gas heat flow equation, bed thickness and gas flow rate between funtcional relationship calculate, in four mutually perpendicular directions, four groups of calculated values are expressed as: v
nE, 1, v
nE, 2..., v
nE, 6, v
7; v
sE, 1, v
sE, 2..., v
sE, 6; v
sW, 1, v
sW, 2..., v
sW, 6; v
nW, 1, v
nW, 2..., v
nW, 6.The unit of each gas speed calculated value is m/s.Wherein, v
7centered by the gas speed of measurement point.
Step 2, sets up the radial distribution model in furnace roof region, determines the central zone of described furnace roof region gas flow distribution, region intermediate and fringe region according to the quantity of described measurement point and its radial distribution;
Described radial distribution model, is divided into 1 central circular that one is the center of circle with cross temperature speed measuring device center measurement point (as in Fig. 2 13) and 6 annular sections (as in Fig. 2 14) by blast furnace throat by radial direction.
Described central circular and annular section, wherein, position, outermost layer annular section edge is determined by blast furnace throat internal diameter, and central circular and all the other positions, annular section edge are then determined by the ring cross-section center of gravity place annulus of place annulus between adjacent measurement points.
Described ring cross-section center of gravity place annulus is the determined annulus of centroid of section radius of place annulus between two adjacent groups measurement point in blast furnace throat radial direction.
The central zone of described stock gas distribution, by central circular C
7with an annular section C of this central circular of next-door neighbour
6composition.The fringe region of described stock gas distribution, by two the annular section C being positioned at blast furnace throat outermost radial outside
1and C
2composition.The region intermediate of described stock gas distribution, is made up of all the other annular sections between stock gas distribution center region and fringe region, comprised annular section C
3, C
4and C
5.
Step 3, calculates the central zone of furnace roof region gas flow distribution respectively, the Gas Flow of region intermediate and fringe region quantizes characterization parameter;
Described stock gas distribution center region, region intermediate, fringe region Gas Flow quantize characterization parameter, are expressed as Q
center, Q
middle, Q
edge, calculated by following formula:
Wherein, Z represents " " center ", " centre ", " edge " respectively.
Described furnace top coal quantity, is calculated by gas flowrate in bosh × (1+r).Wherein, r for affect by chemical reaction process in State of Blast Furnace, the per-cent that furnace top coal quantity increases compared to gas flowrate in bosh; Gas flowrate in bosh is calculated by following formula:
V
bG=1.21 × hot blast air quantity+2 × oxygen enrichment flow+(44.8 × air blast hygroscopic water × total hot blast air quantity)/18000
+ (22.4 × injecting coal quantity × coal dust hydrogen content)/12000
Wherein, the parameters such as hot blast air quantity, oxygen enrichment flow, air blast hygroscopic water, total hot blast air quantity, injecting coal quantity, coal dust hydrogen content are by the known parameter of high furnace control system, and the unit of gas flowrate in bosh is Nm
3/ min; The unit of air quantity is Nm
3/ min; The unit of Rich Oxygen Amount is Nm
3/ min; The unit of humidity is g/Nm
3; The unit of injecting coal quantity is kg/h; The unit of coal dust hydrogen content is %.
Step 4, quantizes according to the Gas Flow of each region gained the gas fluid distrbution evaluation number that characterization parameter calculates each region;
Step 5, according to calculating the blast furnace roof of gained in the gas fluid distrbution evaluation number in each region, carries out quantitative evaluation to described gas fluid distrbution.
The ins and outs focusing on not launching in description embodiment one of the present embodiment, the step details identical with embodiment one does not repeat one by one at this.
Embodiment four
Native system adopts C Plus Plus programming, and picture is HMI (man-machine interface); Be directed to blast furnace production process 30, by being applied in server and client terminal respectively based on OPC (OLE for process control) mechanics of communication (OPC communication interface 31), the basic data of Real-time Obtaining blast furnace, and by database, institute's image data is stored, this database is Oracle11G, stores intermediate data and result data etc. in the data of the instrument to collect obtained from blast furnace, model calculating parameter, computation process.Wherein, this systemic software development adopts MicrosoftVisualStudio2010 tool kit, referring to Fig. 3 particularly, for the invention provides a kind of system construction drawing of quantitative evaluation top gas flow point cloth, comprising:
Data acquisition module 32, is suitable for by OPC technology, the gas temperature parameter of capture setting in blast furnace roof temperature and speed measuring device measured by each measurement point and gas speed parameter;
Wherein, in furnace roof cross temperature speed measuring device, comprise the temperature and speed measuring device be made up of the cantilever temperature and speed measuring bar of three short length, at blast furnace throat position, four cantilever temperature and speed measuring bars are that 90 ° of directions are installed by flange, are in northeast, the southeast, southwest, northwest four direction respectively.The short cantilever temperature and speed measuring bar of every root is provided with 6 measurement point, long cantilever temperature and speed measuring bar is provided with 7 measurement point, in four mutually perpendicular directions, four measurement point that numbering is J are equal with the radial distance of blast furnace throat center measurement point (being numbered the measurement point of 7), J=1,2 ..., 6.The OPC communications protocol of the collection and utilization safety and stability of data, guarantees in time and stably obtains the sensing data at blast fumance scene.The timed interval of data gathering according to blast fumance on-site actual situations and model computation requirement, and uses the internal memory processing capacity of application server, adopts the statistical average asking for measurement point in these 5 minutes every 5 minutes.
Data memory module 33, is suitable for, by the gas temperature parameter of collection and gas speed parameter, being stored into the database on database server, being also suitable for all data stored in management database;
Data storage control module is used for the data that storage of collected obtains, and mainly completes the storage of data and the management of parameter.In the present embodiment, by data storage control module by data collecting module collected to blast furnace roof cross temperature speed measuring device each measurement point gas temperature data and gas speed calculation of correlation parameter, be stored in the oracle database on database server, and be in charge of the Various types of data stored in database, facilitate output control module to carry out real-time calling.
In the present embodiment, by OPC agreement, the corresponding data of blast furnace roof cross temperature speed measuring device needed for server directly obtains from blast fumance scene, meanwhile, data server set up corresponding oracle database to gather, the corresponding data that calculates stores; Define accurate, stable real-time data acquisition mechanism and safe and reliable data storage mechanism.
Data preprocessing module 34, is suitable for based on expertise, rejects the abnormal data in the gas temperature and gas speed gathered, and carries out completion in conjunction with the historical data of each measurement point and neighboring area data to the data rejected;
After completing the collection of data and the storage of data, need to carry out pre-treatment to data, with guarantee model calculate the legitimacy of employing data, be unlikely to the result allowing the data influence of test set exception to Continuous plus.In data preprocessing module, based on expertise, reject collection point gather gas temperature and gas speed in abnormal data, simultaneously, the dealing of abnormal data of Corpus--based Method rule is carried out in conjunction with the historical data of collection point and neighboring area data, the screening of temperature samples data to gathering and completion is completed, the pre-treatment of complete paired data according to hot-fluid equilibrium principle.
In the present embodiment, the data (gas temperature and gas speed) of collection are carried out abnormity removing, the pre-treatment such as screening and completion, make the data gathered relative to more accurate, the data exception of collection can not be made because of the fault of measurement point devices.
Model computation module 35, be suitable for the gas temperature parameter that gathers according to blast furnace roof temperature and speed measuring device and gas speed parameter and configuration parameter, calculate stock gas distribution center region, the Gas Flow of region intermediate and fringe region quantizes characterization parameter, and quantize based on calculating gained Gas Flow the gas fluid distrbution evaluation number that characterization parameter correspondence calculates stock gas distribution center region, region intermediate and fringe region;
Model computation module adopts the method for quantitative evaluation top gas flow point cloth involved in the present invention, according to the data after data prediction, in conjunction with configuring condition and the configuration parameter of blast furnace roof cross temperature speed measuring device, calculate stock gas distribution center region, the Gas Flow of region intermediate and fringe region quantizes characterization parameter, calculate the gas fluid distrbution evaluation number of stock gas distribution center region, region intermediate and fringe region based on this calculation result further, and calculation result is stored in the oracle database on database server.
Output control module 36, be suitable for the output mode according to arranging, extract from database calculate obtain stock gas distribution center region, region intermediate and fringe region gas fluid distrbution evaluation number, correspondingly in the mode of cake chart, trend map or Model Diagnosis, gas fluid distrbution evaluation number is shown.
As shown in Figure 4, for the system interface display sectional drawing of blast furnace quantitative evaluation top gas flow point cloth of the present invention, output control module is used for the HMI display frame of programming realization models applying, extract from database calculate obtain stock gas distribution center region, region intermediate and fringe region gas fluid distrbution evaluation number, and by user, the display format exported to be controlled.With forms such as cake chart, trend map, Model Diagnosis outputs, real-time top gas flow point cloth quantitative evaluation result is shown.
In the present embodiment, utilize HMI menu display function, extract from database calculate obtain stock gas distribution center region, region intermediate and fringe region gas fluid distrbution evaluation number, show calculating gained top gas flow point cloth quantitative evaluation result in real time with forms such as cake chart, trend map, Model Diagnosis outputs, and provide the variation tendency of distribution situation to show, realize Real time displaying and the monitoring of top gas stream distribution situation.
Embodiment five
Refer to Fig. 5, be shown as the system program schema of quantitative evaluation top gas flow point cloth of the present invention; Comprise:
Data acquisition module, the gas temperature parameter of capture setting in blast furnace roof temperature and speed measuring device measured by each measurement point and gas speed parameter;
Data memory module, the gas temperature parameter of storage of collected and gas speed parameter to the database on database server, meanwhile, all data stored in management database;
Whether be abnormal data, when described gas temperature parameter and gas speed parameter exceed default expertise data, then judge that these data of collection are as abnormal data if judging to store in database corresponding gas temperature parameter with gas speed parameter; Log-on data pre-processing module, based on expertise, reject collection point gather gas temperature parameter and gas speed parameter in abnormal data, simultaneously, the dealing of abnormal data of Corpus--based Method rule is carried out in conjunction with the historical data of collection point and neighboring area data, complete the screening of temperature samples data to gathering and completion according to hot-fluid equilibrium principle, the pre-treatment of complete paired data, carries out next step.
When described gas temperature parameter and gas speed parameter do not exceed default expertise data, then judge that these data of collection are as normal data, carry out next step.
Model computation module, be suitable for the gas temperature parameter that gathers according to blast furnace roof temperature and speed measuring device and gas speed parameter and configuration parameter, calculate stock gas distribution center region, the Gas Flow of region intermediate and fringe region quantizes characterization parameter, and quantize based on calculating gained Gas Flow the gas fluid distrbution evaluation number that characterization parameter correspondence calculates stock gas distribution center region, region intermediate and fringe region;
Output control module, be suitable for the output mode according to arranging, extract from database calculate obtain stock gas distribution center region, region intermediate and fringe region gas fluid distrbution evaluation number, correspondingly in the mode of cake chart, trend map or Model Diagnosis, gas fluid distrbution evaluation number is shown.
In sum, the present invention is by obtaining gas temperature and the gas speed parameter of each measurement point on described blast furnace roof, the radial distribution model in furnace roof region is set up according to the quantity of measurement point and its radial distribution, according to radial distribution model determination top gas stream center, region intermediate and fringe region, calculate its Gas Flow respectively and quantize characterization parameter and gas fluid distrbution evaluation number, thus quantitatively evaluating is carried out to top gas distribution, avoid simple using gas velocity or gas flow as the drawback of air flow method Appreciation gist, solve blast furnace operating personnel and only rule of thumb simply pass judgment on the strong and weak and problem brought of stock gas stream radial distribution with furnace roof take off data, react furnace roof gas fluid distrbution situation truely and accurately, thus improve blast furnace operating adjustment level.So the present invention effectively overcomes various shortcoming of the prior art and tool high industrial utilization.
Above-described embodiment is illustrative principle of the present invention and effect thereof only, but not for limiting the present invention.Any person skilled in the art scholar all without prejudice under spirit of the present invention and category, can modify above-described embodiment or changes.Therefore, such as have in art usually know the knowledgeable do not depart from complete under disclosed spirit and technological thought all equivalence modify or change, must be contained by claim of the present invention.
Claims (8)
1. a method for quantitative evaluation top gas flow point cloth, is characterized in that, comprising:
Step one, the gas temperature parameter of capture setting each measurement point on described blast furnace roof and gas speed parameter;
Step 2, sets up the radial distribution model in furnace roof region, determines the central zone of described furnace roof region gas flow distribution, region intermediate and fringe region according to the quantity of described measurement point and its radial distribution;
Step 3, according to gas temperature parameter and the gas speed parameter of each measurement point, calculates the central zone of furnace roof region gas flow distribution respectively, the Gas Flow of region intermediate and fringe region quantizes characterization parameter;
Step 4, quantizes according to the Gas Flow of each region gained the gas fluid distrbution evaluation number that characterization parameter calculates each region;
Step 5, according to calculating the blast furnace roof of gained in the gas fluid distrbution evaluation number in each region, carries out quantitative evaluation to described gas fluid distrbution.
2. the method for quantitative evaluation top gas flow point cloth according to claim 1, it is characterized in that, the concrete steps of described step one, comprising:
Described blast furnace roof is provided with temperature and speed measuring device, the cantilever temperature and speed measuring bar that described temperature and speed measuring device is long by one and M root is short forms, perpendicular to furnace throat sidewall, the cantilever temperature and speed measuring bar that M+1 root is equal angular direction is installed by flange at blast furnace throat position, wherein, short cantilever temperature and speed measuring bar is provided with N number of measurement point, long cantilever temperature and speed measuring bar is provided with N+1 measurement point, and M, N are the natural number being less than 10.
3. the method for quantitative evaluation top gas flow point cloth according to claim 2, is characterized in that, comprising:
Described measurement point, is arranged on cantilever temperature and speed measuring bar that M+1 root is equal angular direction, and on every root cantilever temperature and speed measuring bar numbering to be all the measurement point of J equal with the radial distance of center measurement point, wherein, J=1,2 ... N;
Described center measurement point is the measurement point of close blast furnace central position set on long cantilever temperature and speed measuring bar;
Described measurement point is installed armoured thermocouple and coal gas respectively and to be tested the speed galvanic couple, correspondingly respectively measures gas temperature parameter and gas speed parameter.
4. the method for quantitative evaluation top gas flow point cloth according to claim 1, it is characterized in that, the concrete steps of described step 2, comprising:
Described radial distribution model, is divided into furnace roof temperature and speed measuring device center measurement point be the center of circle a central circular and N number of annular section by blast furnace throat by radial direction;
Described central circular and annular section, wherein, position, outermost layer annular section edge is determined by blast furnace throat internal diameter, and central circular and all the other positions, annular section edge are determined by the ring cross-section center of gravity place annulus of place annulus between adjacent measurement points;
Described ring cross-section center of gravity place annulus is the determined annulus of centroid of section radius of place annulus between two adjacent groups measurement point in blast furnace throat radial direction.
5. the method for quantitative evaluation top gas flow point cloth according to claim 4, is characterized in that, comprising:
The central zone of described stock gas distribution, be made up of central circular several annular sections with this central circular of next-door neighbour, this region total area accounts for 10% of the furnace throat cross section total area;
The fringe region of described stock gas distribution, be made up of several annular sections being positioned at blast furnace throat outermost radial outside, this region total area accounts for 30% of the furnace throat cross section total area;
The region intermediate of described stock gas distribution, being made up of all the other annular sections between stock gas distribution center region and fringe region, this region total area accounts for 60% of the furnace throat cross section total area.
6. the method for quantitative evaluation top gas flow point cloth according to claim 1, it is characterized in that, described step 3 specifically comprises:
Described stock gas distribution center region, region intermediate, fringe region Gas Flow quantize characterization parameter, are expressed as Q
center, Q
middle, Q
edge, calculated by following formula:
Wherein, Z represents " " center ", " centre ", " edge " respectively;
Described region gas temperature, is calculated by comprising all measurement point gas temperature observed values in region by pre-treatment and arithmetical mean and is obtained;
Described region gas speed, by comprising all measurement point gas velocity observed values in region or calculated value is calculated by pre-treatment and arithmetical mean and obtained;
Described furnace top gas temperature, is calculated by pre-treatment and arithmetical mean by stock gas upcast measured temperature;
Described stock gas flow velocity, the ratio according to furnace top coal quantity and furnace throat area is determined;
Described furnace top coal quantity, calculated by gas flowrate in bosh × (1+r), wherein r is for affect by chemical reaction process in State of Blast Furnace, the per-cent that furnace top coal quantity increases compared to gas flowrate in bosh.
7. the method for quantitative evaluation top gas flow point cloth according to claim 1, it is characterized in that, described step 4 specifically comprises:
Described stock gas distribution center region, region intermediate, fringe region gas fluid distrbution evaluation number, be expressed as I
center, I
middle, I
edge, calculated by following formula:
I
z=Q
z/ (Q
center+ Q
middle+ Q
edge)
Wherein, Z represents " " center ", " centre ", " edge " respectively.
8. a system for quantitative evaluation top gas flow point cloth, is characterized in that, comprising:
Data acquisition module, is suitable for by OPC technology, the gas temperature parameter of capture setting in blast furnace roof temperature and speed measuring device measured by each measurement point and gas speed parameter;
Data memory module, is suitable for, by the gas temperature parameter of collection and gas speed parameter, being stored into the database on database server, being also suitable for all data stored in management database;
Data preprocessing module, is suitable for based on expertise, rejects the abnormal data in the gas temperature and gas speed gathered, and carries out completion in conjunction with the historical data of each measurement point and neighboring area data to the data rejected;
Model computation module, be suitable for the gas temperature parameter that gathers according to blast furnace roof temperature and speed measuring device and gas speed parameter and configuration parameter, calculate stock gas distribution center region, the Gas Flow of region intermediate and fringe region quantizes characterization parameter, and quantize based on calculating gained Gas Flow the gas fluid distrbution evaluation number that characterization parameter correspondence calculates stock gas distribution center region, region intermediate and fringe region;
Output control module, be suitable for the output mode according to arranging, extract from database calculate obtain stock gas distribution center region, region intermediate and fringe region gas fluid distrbution evaluation number, correspondingly in the mode of cake chart, trend map or Model Diagnosis, gas fluid distrbution evaluation number is shown.
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| CN105986048A (en) * | 2016-07-27 | 2016-10-05 | 山西太钢不锈钢股份有限公司 | Blast furnace riser temperature detection method |
| CN107515999A (en) * | 2017-10-13 | 2017-12-26 | 中南大学 | It is a kind of to be used to determine the motion of top gas stream and the method for Dust distribution |
| CN108396085A (en) * | 2017-02-05 | 2018-08-14 | 鞍钢股份有限公司 | The computational methods of furnace bosh coal gas volume index in a kind of blast furnace production process |
| CN108896197A (en) * | 2018-05-22 | 2018-11-27 | 安徽瑞鑫自动化仪表有限公司 | A kind of intelligent thermometric regulator control system under hot environment |
| CN109022650A (en) * | 2018-09-29 | 2018-12-18 | 武汉钢铁有限公司 | A kind of recognition methods of upper blast furnace gas fluid distrbution |
| CN110752042A (en) * | 2019-10-16 | 2020-02-04 | 广东韶钢松山股份有限公司 | Blast furnace hearth state determination method and device and electronic equipment |
| CN110760633A (en) * | 2019-11-26 | 2020-02-07 | 中冶赛迪重庆信息技术有限公司 | Method and device for controlling distribution of air flow in blast furnace, storage medium and electronic terminal |
| CN112798814A (en) * | 2019-11-14 | 2021-05-14 | 广州汽车集团股份有限公司 | Wind speed distribution testing method and system |
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| CN112798814B (en) * | 2019-11-14 | 2023-09-01 | 广州汽车集团股份有限公司 | Wind speed distribution testing method and system |
| CN110760633A (en) * | 2019-11-26 | 2020-02-07 | 中冶赛迪重庆信息技术有限公司 | Method and device for controlling distribution of air flow in blast furnace, storage medium and electronic terminal |
| CN114154787A (en) * | 2021-10-26 | 2022-03-08 | 中冶南方工程技术有限公司 | Blast furnace condition on-line evaluation system |
| WO2023070692A1 (en) * | 2021-10-26 | 2023-05-04 | 中冶南方工程技术有限公司 | Online evaluation system for blast furnace condition |
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