CN205115514U - Monitoring blast furnace upwarps device of stove bottom temperature variation - Google Patents

Abstract

The utility model discloses a monitoring blast furnace upwarps device of stove bottom temperature variation belongs to blast furnace equipment technical field. The utility model discloses a heat -resisting foundation pier of blast furnace and stove bottom shrouding still include point for measuring temperature and temperature sensor, wherein: the point for measuring temperature sets up between heat -resisting foundation pier of blast furnace and stove bottom shrouding, the temperature sensor landfill is in point for measuring temperature department to export blast furnace external control system to through the lead wire. The utility model discloses an use, judge the -> record through installation -> design temperature, parameter model -> and make statistics of, utilize temperature -detecting device to detect the bottom of blast furnace temperature variation on line in succession, provide many measuring points real -time data the purpose of being convenient for carry on the analysis to the stove bottom temperature variation. Utilize temperature data to upwarp pressure etc. To furnace top pressure, air supply temperature, drop -bottom simultaneously and carry out data and compare the analysis and establish corresponding model, for the blast furnace process safety in production provides technical support, for finding the reason that the drop -bottom upwarped accurately, provide data analysis.

Description

A kind of monitor blast furnace upwarp bottom temperature change device

Technical field

The utility model belongs to blast-furnace equipment technical field, be specifically a kind of monitor blast furnace upwarp bottom temperature change device.

Background technology

The change that the large-scale iron-smelting blast furnace in the whole world is produced with blast-furnace smelting, part blast furnace there will be drop-bottom and has upwarped, and upwarping drop-bottom can increase along with the blast-furnace production campaign and aggravate; Deformation seriously can cause cupola well damage, leakage gas directly has influence on the person and device security.Upwarping the origin cause of formation to drop-bottom at present there is no clearly qualitative both at home and abroad, and drop-bottom rising stress does not also have quantitative measurment data with pushing up the relations such as processing parameter such as pressure, wind pushing temperature, throat temperature, temperature, materials load and materials structure in State of Blast Furnace simultaneously.Therefore present stage most blast furnace cause blast furnace to fail full load, full top pressure to run because drop-bottom upwarps, do not reach the target of economical operation.

Because drop-bottom excessively upwarps the consequence comparatively obviously caused be:

1, last furnace shell goes up;

2, stock gas delivery line corrugated tube distortion;

3, furnace roof weighing pot and upper platform beam interfere weigh influenced;

4, ten layers of outside pipe arrangement of cooling stave leak by platform extruding weld seam;

5, air plane is raised, and blowpipe upwarps, and blowpipe occurs and burns accident etc.

China Patent Publication No. CN104313217A, publication date 2015.01.28, disclose a kind of Blast Furnace Bottom, mainly for providing a kind of better tightness, avoiding blast furnace base plate to upwarp, prevent the Blast Furnace Bottom of burn-through of furnace hearth.This invention Blast Furnace Bottom, comprises lower shrouding, concrete piers and upper sealing plate, is provided with carbon element ramming mass between described concrete piers and described furnace shell, between described upper sealing plate and the upper surface of described concrete piers, be provided with water-cooled tube.The upper sealing plate of this invention Blast Furnace Bottom and lower shrouding form the two seals defence line of Blast Furnace Bottom, improve the sealing property of Blast Furnace Bottom.Concrete piers and upper and lower shrouding form rigid box, only have furnace bottom completely to spread carbon brick, more can resist upwarping of lower shrouding above base plate of the prior art, namely resist upwarping of base plate.Water-cooled tube is arranged on the below of upper sealing plate, avoids furnace bottom Cooling Pipe Crack and cause the Serious Accident of burn-through of furnace hearth to occur.This invention by the improvement of Blast Furnace Bottom and below water-cooled tube being arranged on upper sealing plate avoid causing furnace bottom Cooling Pipe Crack because blast furnace base plate upwarps, but effectively not solve there is the problem that blast furnace base plate upwarps.

Utility model content

1. the utility model technical problem that will solve

Upwarp for there is blast furnace base plate in prior art the problem causing major safety risks and heavy economic losses, the utility model provide a kind of monitor blast furnace upwarp bottom temperature change device.It can realize utilizing temperature-detecting device, and on-line continuous detects Bottom Temperature change, provides many measurement point real time data to be convenient to change to bottom temperature the object analyzed.Utilize temperature data that furnace top pressure, wind pushing temperature, drop-bottom are upwarped to pressure etc. and carry out comparing analysis and set up corresponding model simultaneously; thus under utilizing the prerequisite of Model Monitoring and protection Blast Furnace Bottom equipment safety operation; for blast-furnace smelting safety in production provides technical support; and be that blast-furnace smelting production enhancement economic and technical norms improve data analysis; for finding the reason that drop-bottom upwarps accurately, provide data analysis.

2. technical scheme

For achieving the above object, the technical scheme that the utility model provides is:

Monitor the device that blast furnace upwarps bottom temperature change, comprise blast furnace heat resisting foundation pier and furnace bottom shrouding, also comprise point for measuring temperature and temperature sensor, wherein: described point for measuring temperature is arranged between blast furnace heat resisting foundation pier and furnace bottom shrouding; Described temperature sensor landfill in point for measuring temperature place, and exports blast furnace external control system to by lead-in wire.

Further scheme, also comprises annular retaining ring and mould material; Described mould material is poured in the gap that formed between furnace bottom shrouding and blast furnace heat resisting foundation pier, around temperature sensor; Described annular retaining ring is fixed on furnace shell periphery, is centered around around mould material.

Further scheme, described point for measuring temperature is 2/group, evenly arranges to the gap end between blast furnace heat resisting foundation pier and furnace bottom shrouding at annular retaining ring, thisly equidistantly distributes the rule that mode more easily finds out temperature variation, more effective to the analysis of data.

Further improved plan, described mould material is high heat conduction gravity flow pouring material, thermal conductivity { 100 DEG C, (200 DEG C × 24h) } >=10w/m.k.

Further improved plan, high heat conduction gravity flow pouring material comprises SiC, corundum, water reducer, dispersion agent and aqueous binders.

Further improved plan, the parts by weight that high heat conduction gravity flow pouring material is respectively prepared burden are: SiC, 80 ~ 90 parts; Aqueous binders, 20 ~ 30 parts; Corundum, 9 ~ 19 parts; Water reducer and dispersion agent totally 1 part.

Further improved plan, to distribute 16 groups of 32 points for measuring temperature at blast furnace bottom surface even circumferential, corresponding temperature sensor is 32, to the temperature acquisition at 32 positions, 16 directions, blast furnace bottom surface, the adequacy of data gathering can be reached, avoid again overabundance of data to cause unnecessary excessive computation.

Monitor the application that blast furnace upwarps the device of bottom temperature change, the steps include:

A, installation: after pre-buried for 32 temperature sensors, in the gap between blast furnace heat resisting foundation pier and furnace bottom shrouding, pour into mould material;

B, design temperature, parametric model:

The outer point for measuring temperature temperature value often organized is set as TE _n1, interior point for measuring temperature temperature value is set as TE _n2, then 16 outer point for measuring temperature temperature values are followed successively by TE ₀₁₁, TE ₀₂₁, TE ₀₃₁, TE ₀₄₁tE ₁₆₁, corresponding 16 interior point for measuring temperature temperature values are followed successively by TE ₀₁₂, TE ₀₂₂, TE ₀₃₂, TE ₀₄₂tE ₁₆₂;

Calculate and often organize point for measuring temperature mean value T _aVG1, T _aVG2,

$T_{AVG1}=\frac{{\mathrm{TE}}_{011}+{\mathrm{TE}}_{021}+\mathrm{...}+{\mathrm{TE}}_{161}}{16}$ Formula (I);

$T_{AVG2}=\frac{{\mathrm{TE}}_{012}+{\mathrm{TE}}_{022}+\mathrm{...}+{\mathrm{TE}}_{162}}{16}$ Formula (II);

Calculate each point for measuring temperature temperature TE _nmwith this cell mean T _aVGmdifference TD _nm:

TD _nm=TE _nm-T _aVGmformula (III);

TD ₀₁₁=TE ₀₁₁-T _aVG1formula (IV);

Note: n---value 01,02 ..., 16, represent 16 points for measuring temperature often organized;

M---value 1,2, represents outer, interior point for measuring temperature respectively;

Formula (III) is TD _nmgeneral formula, formula (IV) is with point for measuring temperature TE ₀₁₁for the deviation of example calculates;

According to blast furnace technology situation, calculate the Maximum Permissible Temperature Difference TD often organizing point for measuring temperature _mAX1and TD _mAX2; As the TD of certain point for measuring temperature _nmabsolute value be greater than TD _mAXm, then this point for measuring temperature sends " relative temperature difference overload alarm " TR _nm=TRUE:

If (abs (TD _nm) >=TD _mAXm) TR _nm=TRUE formula (V);

If point for measuring temperature temperature TE _mnbe greater than this group desired temperature TS _m, then " temperature over-range warning " TA is sent _nm:

If (TD _nm>=TS _m) TA _nm=TRUE formula (VI);

Often organize desired temperature TS _marrange according to production technique and characteristics of blast furnace;

C, judgment mode:

Arbitrary point for measuring temperature sends warning, namely judges whether its week neighbour's point for measuring temperature is in alarm condition simultaneously, if neighbour's point for measuring temperature is all reported to the police, sends and heavily reports to the police: namely once TA _nmsend warning, need 3 the point for measuring temperature (TA judging its neighbour _n-1m, TA _n+1m, TA _nm+1or TA _nm-1) whether report to the police, if the same alarm of this 4 point for measuring temperature, namely send and heavily report to the police, adjusting process parameter, the generation of Accident prevention; Such as: TA ₀₅₁send warning, then judge TA ₀₄₁, TA ₀₆₁, TA ₀₅₂whether be TRUE, if these 4 is all TRUE, sends and heavily report to the police;

D, record statistics: gather and record real time data, formulate monitoring curve for each changes in process parameters.

Further application, described monitoring curve comprises 32 point for measuring temperature temperature detection averages upwarp pressure initiation respectively monitoring curve with furnace top pressure, wind pushing temperature, drop-bottom.

Further application, also comprises step e: sum up the bottom temperature Changing Pattern of blast furnace under various processing parameter, so that the bottom temperature parameter be provided under higher working condition provides process parameters.

3. beneficial effect

Adopt the utility model, there is following beneficial effect:

(1) monitoring blast furnace of the present utility model upwarps the device of bottom temperature change, the temperature of drop-bottom all from in-furnace temperature by the heat by conduction of cupola well to drop-bottom, under normal circumstances, bottom temperature is substantially invariable, and once the cupola well that generation causes because drop-bottom upwarps damages, the situation of leakage gas, the heat being delivered to furnace bottom in stove will increase, and reflects the increase of bottom temperature, and adopts pre-buried hot resistance detection bottom temperature just indirectly can reflect cupola well furnace bottom situation.

(2) monitoring blast furnace of the present utility model upwarps the device of bottom temperature change, and when annular retaining ring is avoided pouring into a mould, moisture mould material is exosmosed; Mould material can effective fixed temperature sensor, avoids causing unnecessary displacement, and affects the accuracy of temperature acquisition;

(3) monitoring blast furnace of the present utility model upwarps the device of bottom temperature change, and folding strength and the ultimate compression strength of high heat conduction gravity flow pouring material are high, and thermal conductivity is large, and the accurate acquisition for data provides good basic condition;

(4) monitoring blast furnace of the present utility model upwarps the device of bottom temperature change, to be contriver upwarp the combined factors such as power consider according to the small space of the special operation condition of Blast Furnace Bottom, hold-down gear and the furnace bottom shrouding that upwarps, the furnace bottom shrouding that upwarp for the composition proportion of high heat conduction gravity flow pouring material, first draft mould material folding strength, ultimate compression strength and thermal conductivity parameter, meticulous apolegamy batching and proportioning, through data gathering repeatedly and checking, the composition proportion finally drawn;

(5) monitoring blast furnace of the present utility model upwarps the application of the device of bottom temperature change, data association between pressure is upwarped by setting up bottom temperature and furnace top pressure, wind pushing temperature, drop-bottom, when reporting to the police in conjunction with bottom temperature, rule is found in the change of each parameter, upwarps major cause to find out furnace bottom.

Accompanying drawing explanation

Fig. 1 is structural representation of the present utility model;

Fig. 2 is furnace bottom point for measuring temperature distribution plan;

Fig. 3 is bottom temperature Change in Mean every day curve model in embodiment 1;

Fig. 4 is drop-bottom pressure Change in Mean every day curve model in embodiment 1;

Fig. 5 is corresponding furnace top pressure Change in Mean every day curve model in embodiment 1;

Fig. 6 is corresponding hot blast temperature Change in Mean every day curve model in embodiment 1.

Label declaration in schematic diagram: 1, blast furnace foundation; 2, blast furnace heat resisting foundation pier; 3, annular retaining ring; 4, furnace bottom shrouding; 5, mould material; 6, point for measuring temperature; 7, furnace shell; 8, temperature sensor.

Embodiment

Below in conjunction with specific embodiment, the utility model is described in detail.

Embodiment 1

The a kind of of the present embodiment monitors the device that blast furnace upwarps bottom temperature change, as shown in Figure 1, comprise blast furnace heat resisting foundation pier 2, furnace bottom shrouding 4, point for measuring temperature 6, temperature sensor 8, annular retaining ring 3 and mould material 5, wherein: described point for measuring temperature 6 is arranged between blast furnace heat resisting foundation pier 2 and furnace bottom shrouding 4; Described temperature sensor 8 landfill in point for measuring temperature 6 place, and exports blast furnace external control system to by lead-in wire 9.Described mould material 5 is poured in the gap of formation between furnace bottom shrouding 4 and blast furnace heat resisting foundation pier 2, around temperature sensor 8; Described annular retaining ring 3 is fixed on furnace shell 7 periphery, is centered around around mould material 5.Point for measuring temperature 6 is 2/group, and the gap end between annular retaining ring 3 to blast furnace heat resisting foundation pier 2 and furnace bottom shrouding 4 is evenly arranged, and to distribute 16 groups of 32 points for measuring temperature 6 at blast furnace bottom surface even circumferential, corresponding temperature sensor 8 is 32.Mould material 5 is high heat conduction gravity flow pouring material, and thermal conductivity { 100 DEG C, (200 DEG C × 24h) } is 10w/m.k, and the parts by weight that high heat conduction gravity flow pouring material is respectively prepared burden are: SiC, 80 parts; Aqueous binders, 30 parts; Corundum, 9 parts; Water reducer and dispersion agent totally 1 part.

The a kind of of the present embodiment monitors the application that blast furnace upwarps the device of bottom temperature change, with a 4000m ³blast furnace is example, its furnace bottom radius R=8990mm, girth 56486mm, after it is gone into operation 6 years, occur that furnace bottom shrouding upwarps, and upwarps reason for analyzing, and the monitoring blast furnace devising the present embodiment upwarps the device of bottom temperature change:

A, installation: on blast furnace foundation 1 top, 16 directions within one week, are evenly distributed around drop-bottom, depth of penetration is respectively 2 hot resistances of 1000mm and 2000mm, 32 hot resistance distribution plans are shown in Fig. 2, after being plugged, in the gap between blast furnace heat resisting foundation pier 2 and furnace bottom shrouding 4, pour into high heat conduction gravity flow pouring material;

B, design temperature, parametric model:

Outer point for measuring temperature 6 temperature value often organized is set as TE _n1, interior point for measuring temperature 6 temperature value is set as TE _n2, then 16 outer point for measuring temperature 6 temperature values are followed successively by TE ₀₁₁, TE ₀₂₁, TE ₀₃₁, TE ₀₄₁tE ₁₆₁, corresponding 16 interior point for measuring temperature 6 temperature values are followed successively by TE ₀₁₂, TE ₀₂₂, TE ₀₃₂, TE ₀₄₂tE ₁₆₂;

Calculate and often organize point for measuring temperature 6 mean value T _aVG1, T _aVG2,

$T_{AVG1}=\frac{{\mathrm{TE}}_{011}+{\mathrm{TE}}_{021}+\mathrm{...}+{\mathrm{TE}}_{161}}{16}$ Formula (I);

$T_{AVG2}=\frac{{\mathrm{TE}}_{012}+{\mathrm{TE}}_{022}+\mathrm{...}+{\mathrm{TE}}_{162}}{16}$ Formula (II);

Calculate each point for measuring temperature (6) temperature TE _nmwith this cell mean T _aVGmdifference TD _nm:

TD _nm=TE _nm-T _aVGmformula (III);

TD ₀₁₁=TE ₀₁₁-T _aVG1formula (IV);

Note: n---value 01,02 ..., 16, represent 16 points for measuring temperature 6 often organized;

M---value 1,2, represents outer, interior point for measuring temperature 6 respectively;

Formula (III) is TD _nmgeneral formula, formula (IV) is with point for measuring temperature 6TE ₀₁₁for the deviation of example calculates;

According to blast furnace technology situation, calculate the Maximum Permissible Temperature Difference TD often organizing point for measuring temperature 6 _mAX1and TD _mAX2; As the TD of certain point for measuring temperature 6 _nmabsolute value be greater than TD _mAXm, then this point for measuring temperature 6 sends " relative temperature difference overload alarm " TR _nm=TRUE:

If (abs (TD _nm) >=TD _mAXm) TR _nm=TRUE formula (V);

If point for measuring temperature 6 temperature TE _mnbe greater than this group desired temperature TS _m, then " temperature over-range warning " TA is sent _nm:

If (TD _nm>=TS _m) TA _nm=TRUE formula (VI);

Often organize desired temperature TS _marrange according to production technique and characteristics of blast furnace;

C, judgment mode:

Arbitrary point for measuring temperature 6 sends warning, namely judges whether its week neighbour's point for measuring temperature 6 is in alarm condition simultaneously, if neighbour's point for measuring temperature 6 is all reported to the police, sends and heavily reports to the police: namely once TA _nmsend warning, need 3 the point for measuring temperature 6 (TA judging its neighbour _n-1m, TA _n+1m, TA _nm+1or TA _nm-1) whether report to the police, if the same alarm of this 4 point for measuring temperature 6, namely send and heavily report to the police, adjusting process parameter, the generation of Accident prevention; Such as: TA ₀₅₁send warning, then judge TA ₀₄₁, TA ₀₆₁, TA ₀₅₂whether be TRUE, if these 4 is all TRUE, sends and heavily report to the police;

D, record statistics: gather and record real time data, formulate monitoring curve for each changes in process parameters.

The furnace bottom model picture special according to each point detected temperatures data creating is monitored in real time.And real time data is gathered and record, formulate real time second level monitoring curve (upwarping pressure containing drop-bottom 32 temperature detection and furnace top pressure, wind pushing temperature, drop-bottom) for each changes in process parameters and show one hour simultaneously; Per minute average data and each data 1 minute average data make whole day curve; Generate whole day each data average data form every day to be convenient to make every monthly average form.Thus sum up the bottom temperature Changing Pattern of blast furnace under various working condition, so that the bottom temperature parameter be provided under higher working condition provides process parameters, thoroughly find out the major cause that furnace bottom upwarps.

The a kind of of the present embodiment monitors the application that blast furnace upwarps the device of bottom temperature change, by the continuous data collection on October 1st, 2015 to October 20, relevant temperature as illustrated in figures 3-6, pressure data, be the mean values on the same day, pass through Fig. 4, 5 and 6, can find out that drop-bottom upwarps pressure and furnace top pressure, wind pushing temperature has obvious corresponding relation, furnace top pressure is described, wind pushing temperature is larger, it is larger that drop-bottom upwarps pressure, and as seen from Figure 3, drop-bottom upwarps pressure and also has a certain impact to drop-bottom temperature, although it is little that temperature curve fluctuation upwarps pressure surge compared with drop-bottom, but there are twice temperature value and alarm temperature value to overlap respectively on October 2 and October 11, trigger yellow alarm device, and these two days, be just drop-bottom upwarp pressure surge maximum time.Certainly, drop-bottom temperature fluctuation is little, and have certain relation with the heat conductivility of high heat conduction gravity flow pouring material, also likely thermal conductivity is undesirable.

The meaning measuring drop-bottom temperature obviously can be analyzed from above 4 graphic representations, by the detection of drop-bottom temperature and the setting of alarm temperature, and control drop-bottom upwarp pressure by adjustment furnace top pressure and wind pushing temperature, excessively upwarp to avoid it and cause potential safety hazard and financial loss.

Embodiment 2

The a kind of of the present embodiment monitors the device that blast furnace upwarps bottom temperature change, its basic structure is with embodiment 1, in order to ensure the accuracy of measured temperature and the further checking to conclusion, the batching of device to high heat conduction gravity flow pouring material that the monitoring blast furnace of the present embodiment upwarps bottom temperature change adjusts: SiC, 90 parts; Aqueous binders, 25 parts; Corundum, 14 parts; Water reducer and dispersion agent totally 1 part.By detecting, its thermal conductivity { 100 DEG C, (200 DEG C × 24h) } be 13w/m.k, through simulation test, find that the curve fluctuation of drop-bottom temperature and other parameter reaches unanimity, due to the complicated factor of blast furnace bottom, also will consider folding strength and the ultimate compression strength of high heat conduction gravity flow pouring material, can not its thermal conductivity of raising simply, and ignore other attribute.

Embodiment 3

The a kind of of the present embodiment monitors the device that blast furnace upwarps bottom temperature change, and its basic structure, with embodiment 2, has carried out again adjusting to the batching of high heat conduction gravity flow pouring material: SiC, 85 parts; Aqueous binders, 20 parts; Corundum, 19 parts; Water reducer and dispersion agent totally 1 part.By detecting, its thermal conductivity { 100 DEG C, (200 DEG C × 24h) } is 12w/m.k.

Schematically above be described the utility model and embodiment thereof, this description does not have restricted, and also just one of the embodiment of the present utility model shown in accompanying drawing, actual structure is not limited thereto.So, if those of ordinary skill in the art enlightens by it, when not departing from the invention aim, designing the frame mode similar to this technical scheme and embodiment without creationary, all should protection scope of the present invention be belonged to.

Claims (5)

1. monitor the device that blast furnace upwarps bottom temperature change, comprise blast furnace heat resisting foundation pier (2) and furnace bottom shrouding (4), it is characterized in that: also comprise point for measuring temperature (6) and temperature sensor (8), wherein:

Described point for measuring temperature (6) is arranged between blast furnace heat resisting foundation pier (2) and furnace bottom shrouding (4); Described temperature sensor (8) landfill in point for measuring temperature (6) place, and exports blast furnace external control system to by lead-in wire (9).

2. monitoring blast furnace according to claim 1 upwarps the device of bottom temperature change, it is characterized in that: also comprise annular retaining ring (3) and mould material (5); Described mould material (5) is poured in the gap of formation between furnace bottom shrouding (4) and blast furnace heat resisting foundation pier (2), around temperature sensor (8); Described annular retaining ring (3) is fixed on furnace shell (7) periphery, is centered around mould material (5) around.

3. monitoring blast furnace according to claim 2 upwarps the device of bottom temperature change, it is characterized in that: described point for measuring temperature (6) is 2/group, evenly arrange to the gap end between blast furnace heat resisting foundation pier (2) and furnace bottom shrouding (4) at annular retaining ring (3).

4. monitoring blast furnace according to claim 2 upwarps the device of bottom temperature change, it is characterized in that: described mould material (5) is high heat conduction gravity flow pouring material, thermal conductivity { 100 DEG C, (200 DEG C × 24h) } >=10w/m.k.

5. upwarp the device of bottom temperature change according to the arbitrary described monitoring blast furnace of Claims 1-4, it is characterized in that: to distribute 16 groups 32 points for measuring temperature (6) at blast furnace bottom surface even circumferential, corresponding temperature sensor (8) is 32.