CN207635889U - A kind of heater for rolling steel combustion control system - Google Patents
A kind of heater for rolling steel combustion control system Download PDFInfo
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- CN207635889U CN207635889U CN201721557332.5U CN201721557332U CN207635889U CN 207635889 U CN207635889 U CN 207635889U CN 201721557332 U CN201721557332 U CN 201721557332U CN 207635889 U CN207635889 U CN 207635889U
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Abstract
The utility model discloses a kind of heater for rolling steel combustion control systems, belong to burning control in heating furnace field.The control system of the utility model includes：Heater for rolling steel；Laser detection mechanism, the laser detection mechanism are used to detect the ingredient of flue gas in heater for rolling steel；And temperature monitor, the temperature monitor is for directly measuring billet surface temperature.The purpose of the utility model is to overcome the deficiencies that amount of oxidation loss in existing steel rolling process is higher, provide a kind of heater for rolling steel combustion control system, effectively reduce billet oxidization burning loss amount in heater for rolling steel.
Description
Technical field
The utility model is related to burning control in heating furnace fields, burn and control more specifically to a kind of heater for rolling steel
System processed.
Background technology
Heating furnace is the main energy consumption equipment of steel rolling process.While meeting rolling mill practice requirement, accomplish oven cavity atmosphere,
The optimum control of heating time, heating temperature, reduction oxidization burning loss and energy consumption are the targets that heater for rolling steel production technology is pursued.
The end process (domestic steelmaking complex energy consumption about 600kg marks coal/ton steel) that steel rolling is produced as steel, oxidization burning loss
It is higher, a large amount of energy waste is not only brought, but also Rolling Yield will be influenced, directly affects the economic benefit of enterprise；In addition,
Iron scale accumulation furnace bottom needs periodic cleaning, not only reduces productivity, but also increase field worker labor intensity；In certain feelings
Under condition, unreasonable plus thermogenetic iron scale is difficult to remove, and causes once oxidation iron sheet that steel rolling product surface is caused to be pressed
Oxygen defect problem, influences product quality.Currently, steel industry has been enter into low margin age, and it is cost efficiency, it is energy-saving, it is domestic
Outer iron and steel enterprise has been devoted to reduce heater for rolling steel fuel consumption, reduces oxidization burning loss application technical research.
Heating furnace furnace atmosphere, heating temperature, heating time etc. are the principal elements for influencing billet oxidization burning loss and energy consumption.
At present there are mainly two types of burning control in heating furnace modes, one is calorific value of gas is detected by caloric value instrument, calculate needed for burning
Air capacity regulates and controls each section of air-fuel ratio of heating furnace, controls combustion atmosphere in stove；Second is that the flue gas in on-line checking furnace flue is residual
Oxygen (zirconium oxide detection) is instructed to burning control in heating furnace.Such as patent publication No.：105734264 A of CN, publication date：2016
06 day 07 month year, invention and created name are：A kind of heater for rolling steel combustion position online monitoring method system, this application discloses one
Kind heater for rolling steel combustion position online monitoring method method is made for the mode that traditional heating stove only detects remaining oxygen in flue
It is difficult to independent control at heating furnace difference section combustion atmosphere, the problems such as efficiency of combustion is low, and billet oxidization burning loss is excessive.This application
Oxygen analyzer by being mounted on the combustion gas outlets of each section at the top of heating furnace by case, different sections in on-line measurement stove
The oxygen content of combustion atmosphere is then based on this measurement of oxygen content value, and on-line tuning is carried out to the coefficient of excess air of respective section,
Oxygen content accurately controls in realization heating furnace difference section combustion atmosphere.This application can help operating personnel that will add automatically
Hot stove combustion position operates in claimed range, realizes the different accurate observing and controlling of section combustion position, for promoting the combustion of heating furnace
It burns efficiency, reduce billet oxidization burning loss, improve the performance and lumber recovery of product, there is important engineer application promotional value.
But in actual production, both the above control mode cannot directly reflect the furnace gas situation of each section of heating furnace,
There are problems：(1) for foundation regulation and control heating furnace combustion system burnt to heating furnace with the calorific value of gas of caloric value instrument detection
The indirect control of atmosphere extrapolates air-fuel ratio by calorific value of gas detection, instructs the air-fuel ratio regulation of each section of burner of heating furnace,
Achieve the purpose that best combustion；But the gas calorific value apparatus scope of application is narrow, in certain fluctuation range of specific gas,
Gas calorific value apparatus detection is more accurate, and after gas composition changes, hot-restriking die exceeds the scope of application, error increases.In addition, hot
Value calculates that air-fuel ratio is only an empirical data, and accuracy is not high.Caloric value instrument mainly uses combustion method operation principle (logical at present
Cross flame temperature reflection calorific value situation), it cannot reflect that gas composition forms, according to calorific value it is not possible that Accurate Estimation goes out air-fuel ratio；
(2) often there are the reasons such as larger error in air flow meter or gas flow meter detection, cannot reflect actual flow situation, because
This, the proportioning situation on operation screen can not illustrate whether oxygen is superfluous in stove；(3) it is restricted by temperature in use, zirconium oxide is visited
Head is typically mounted at stove tail, can only reflect burner hearth it is overall whether excessive oxygen, cannot learn whether different heating region proportioning closes
Suitable, the data reference of reflection is not strong.
Meanwhile the determination of Steel In Reheating Furnace base temperature at present relies primarily on inner flue gas of the stove electric thermo-couple temperature and passes through mathematical model
It is calculated, uses indirect measure, uncertain larger, and fluctuation larger, energy consumption higher there are steel billet tapping temperature
The problem of promotion, scaling loss aggravation.
Analysis can be seen that at present under the premise of no precise air-fuel ratio and steel billet temperature instruct for these reasons,
Heating furnace optimum combustion control is can not be achieved by experience adjusting air-fuel ratio and the indirectly operation mode of measurement steel billet temperature, is dropped
The target of suboxides burn out rate and burnup.In conclusion how to effectively reduce billet oxidization burning loss in existing heater for rolling steel, it is
In the prior art the technical issues of urgent need to resolve.
Utility model content
1. utility model technical problems to be solved
The purpose of the utility model is to overcome the deficiencies that amount of oxidation loss in existing steel rolling process is higher, provide one kind
Heater for rolling steel combustion control system effectively reduces billet oxidization burning loss amount in heater for rolling steel.
2. technical solution
In order to achieve the above objectives, technical solution provided by the utility model is：
The heater for rolling steel combustion control system of the utility model, including：
Heater for rolling steel；
Laser detection mechanism, the laser detection mechanism are used to detect the ingredient of flue gas in heater for rolling steel；
And temperature monitor, the temperature monitor is for directly measuring billet surface temperature.
Further improved as the utility model, the heater for rolling steel be divided into along its length preheating section,
Heating one section, heating two sections, heating three sections and soaking zone, the preheating section, heating one section, heating two sections, heating three sections and
Burner is separately installed on hot arc.
It further being improved as the utility model, the laser detection mechanism includes several groups laser detection unit,
Every group of laser detection unit includes an O2Laser detection unit and a CO laser detection unit.
It is further improved as the utility model, the temperature monitor is infrared radiation thermometer, the infrared radiation thermometer
It is arranged at the top of heater for rolling steel；The O2Laser detection unit or CO laser detection units include Laser emission end, laser
Receiving terminal and data acquisition unit, the Laser emission end and laser pick-off end are separately positioned on the both walls of heater for rolling steel
The upper and position at Laser emission end and laser pick-off end higher than steel billet in heater for rolling steel height, on the side wall of heater for rolling steel
Offer the through-hole passed through for laser.
Further improved as the utility model, the preheating section, heating one section, heating two sections, heating three sections and
At least one set of laser detection unit is separately installed on soaking zone.
Further improved as the utility model, the preheating section, heating one section, heating two sections, heating three sections and
At least one infrared radiation thermometer is separately installed on soaking zone.
3. advantageous effect
Using technical solution provided by the utility model, compared with prior art, there is following remarkable result：
(1) in the utility model, using heater for rolling steel sectional combustion control and stove in steel billet temperature infrared detection mode,
O in flue gas may be implemented in heater for rolling steel2, CO and steel billet temperature fast and effeciently detection so that it is each in heater for rolling steel
Section coefficient of excess air is optimized, and to keep each section of optimal combustion state of heater for rolling steel, realizing, which effectively reduces oxidation, burns
The target of damage and energy consumption.
(2) the heater for rolling steel combustion control system of the utility model, can be to the heating of different steel grades and Combustion System system
Degree carries out targetedly optimal control, reduces billet oxidization burning loss in heater for rolling steel, reduces heater for rolling steel energy consumption, improves production
Product lumber recovery, increases economic efficiency, while gas consumption when saving heating.
Description of the drawings
It, below will be to required use in embodiment in order to illustrate more clearly of the technical solution of the utility model embodiment
Attached drawing be briefly described, it should be understood that the following drawings illustrates only some embodiments of the utility model, therefore should not be by
Regard the restriction to range as, for those of ordinary skill in the art, without creative efforts, may be used also
To obtain other relevant attached drawings according to these attached drawings.
Fig. 1 is the overlooking structure diagram of the heater for rolling steel combustion control system of embodiment 1；
Fig. 2 is the flow chart of the heater for rolling steel method for controlling combustion of embodiment 1.
Label declaration in schematic diagram：1, heater for rolling steel；101, preheating section；102, one section is heated；103, two sections are heated；
104, three sections are heated；105, soaking zone；201、O2Laser detection unit；202, CO laser detections unit；3, temperature monitor.
Specific implementation mode
It is new below in conjunction with this practicality to keep the purpose, technical scheme and advantage of the utility model embodiment clearer
Attached drawing in type embodiment, the technical scheme in the utility model embodiment is clearly and completely described, it is clear that is retouched
The embodiment stated is the utility model a part of the embodiment, instead of all the embodiments.Therefore, below to providing in the accompanying drawings
The detailed description of the embodiments of the present invention be not intended to limit claimed the scope of the utility model, but only
Indicate the selected embodiment of the utility model.Based on the embodiments of the present invention, those of ordinary skill in the art are not having
The every other embodiment obtained under the premise of creative work is made, shall fall within the protection scope of the present invention.
To further appreciate that the content of the utility model, the utility model is described in detail in conjunction with the accompanying drawings and embodiments.
Embodiment 1
In conjunction with Fig. 1, the heater for rolling steel combustion control system of the present embodiment, including heater for rolling steel 1, laser detection machine
Structure, the laser detection mechanism are used to detect the ingredient of flue gas in heater for rolling steel 1；And temperature monitor 3, the temperature monitor
3 for directly measuring billet surface temperature.
In specific the present embodiment, heater for rolling steel 1 is divided into preheating section 101, one section 102 of heating, adds along its length
Two section 103 of heat, heating three section 104 and soaking zone 105, preheating section 101, one section 102 of heating, two section 103 of heating, three sections of heating
104 and soaking zone 105 on be separately installed with burner.Laser detection mechanism includes several groups laser detection unit, every group of laser inspection
It includes an O to survey unit2Laser detection unit 201 and a CO laser detections unit 202.Temperature monitor 3 is infrared measurement of temperature
Instrument, the infrared radiation thermometer are arranged at the top of heater for rolling steel 1, are monitored in real time using infrared principles each in heater for rolling steel 1
Section billet surface temperature, reflects heating effect；O2Laser detection unit 201 or CO laser detections unit 202 include Laser emission
End, laser pick-off end and data acquisition unit, Laser emission end and laser pick-off end are separately positioned on the two of heater for rolling steel 1
(i.e. a pair of of Laser emission end, laser pick-off end are separately mounted to 1 both sides face of wall of heater for rolling steel, on side wall on side wall
Be provided with the through-hole for allowing laser light) and the installation site at Laser emission end and laser pick-off end higher than steel in heater for rolling steel 1
Base upper surface about 200mm, to O in flue gas above steel billet2And the detection of CO contents；It is opened up on the side wall of heater for rolling steel 1
There is the through-hole passed through for laser.On preheating section 101, one section 102 of heating, two section 103 of heating, three section 104 of heating and soaking zone 105
It is separately installed at least one set of laser detection unit, every group of laser detection unit can measure in heater for rolling steel 1 each section in real time
O2The air and gas flow of burner in each section are adjusted in time, makes O according to the two values with the content of CO2With the content control of CO
System is finally reached reduction oxidization burning loss in target zone, improves Surface Quality of Steel Billet, reduces the purpose of energy consumption；Preheating section 101,
It is separately installed at least one infrared radiation thermometer on one section 102 of heating, two section 103 of heating, three section 104 of heating and soaking zone 105,
Install infrared radiation thermometer additional on heater for rolling steel 1, can directly, really reflect steel billet temperature, overcome at present rely on thermocouple
Temperature measures inaccurate problem caused by measuring inner flue gas of the stove temperature and then calculating steel billet temperature.
In conjunction with Fig. 2, the heater for rolling steel method for controlling combustion of the present embodiment includes the following steps：
Step 1：Get out above-mentioned heater for rolling steel combustion control system；
Step 2：It controls on preheating section 101, one section 102 of heating, two section 103 of heating, three section 104 of heating and soaking zone 105
Burner burn respectively, control the burning of each burner so that in preheating section 101 flue-gas temperature control at 800 ± 5 DEG C, add
Flue-gas temperature control is heated flue-gas temperature control in two section 103 and is heated at 1250 ± 5 DEG C at 1000 ± 5 DEG C in one section 102 hot
Flue-gas temperature control flue-gas temperature in 1280 ± 5 DEG C, soaking zone 105 is controlled at 1250 ± 5 DEG C in three section 104；
Step 3：The O fed back according to each group laser detection unit2Judge burning deviation state with CO contents；
Step 4：The O that each group laser detection unit is fed back2, CO contents and setting O2, CO contents be compared, pass through
PID increment regulative modes adjust the air and gas flow of each burner so that O in heater for rolling steel 12, CO contents control in mesh
It marks in range.
It is many to influence billet oxidization burning loss factor, for billet oxidization burning loss problem, domestic many scholars propose many
Reduce billet oxidization burning loss measure, as billet surface applying coating, hot steel bloom be heat-fed the methods of, although these methods are one
Determine to alleviate the production quantity of oxidization burning loss in degree, but it is very limited, in actual production, it is also necessary to further decrease steel rolling
The oxidization burning loss of heating furnace steel billet.
In the present embodiment, steel billet from 1 preheating section 101 of heater for rolling steel enter, from soaking zone 105 be discharged, flue gas flow direction with
Steel billet moving direction is on the contrary, heater for rolling steel 1 is divided into preheating section 101, one section 102 of heating, two sections of heating along its length
103, three section 104 and soaking zone 105, and three section of 104 preheating section 101, one section 102 of heating, two section 103 of heating, heating and are heated
It is separately installed with burner on soaking zone 105, when use controls the burning of each burner so that flue-gas temperature controls in preheating section 101
At 800 ± 5 DEG C, heats flue-gas temperature control in one section 102 and heat flue-gas temperature control in two section 103 at 1000 ± 5 DEG C and exist
It 1250 ± 5 DEG C, heats flue-gas temperature control flue-gas temperature in 1280 ± 5 DEG C, soaking zone 105 in three section 104 and controls 1250
± 5 DEG C, meanwhile, according in each section flue-gas temperature and steel billet reach each section when operating mode, by the O in each section2, CO contents point
It does not control in corresponding target zone, wherein O in preheating section 1012Percent by volume control exists in 2.2-2.5%, CO controls
Within 2000ppm；Heat O in one section 1022Percent by volume control is controlled in 1.8-2.1%, CO within 2500ppm；Heating
O in two section 1032Percent by volume control is controlled in 1.5-18%, CO within 3000ppm；Heat O in three section 1042Volume hundred
Divide and is controlled within 3000ppm in 1.5-1.8%, CO than control；O in soaking zone 1052Percent by volume is controlled in 2.5-
2.8%, CO are controlled within 1800ppm, and actual use is found, accordingly independent according to flue-gas temperature in each section in the present embodiment
Control the O in each section2, CO contents so that unit area scaling loss amount mean value is by original 0.7300g/dm2Drop to 0.6077g/
dm2, rate of descent 16.75%.
It, can be with using steel billet temperature infrared detection mode in the control of 1 sectional combustion of heater for rolling steel and stove in the present embodiment
O in flue gas in realization heater for rolling steel 12, CO and steel billet temperature fast and effeciently detection so that each section in heater for rolling steel 1
Coefficient of excess air is optimized, and to keep 1 each section of optimal combustion state of heater for rolling steel, realizing effectively reduces oxidization burning loss
With the target of energy consumption.
The heater for rolling steel combustion control system of the present embodiment, can heat different steel grades and Combustion System system carries out
Targetedly optimal control reduces billet oxidization burning loss in heater for rolling steel, reduces heater for rolling steel energy consumption, raising product is become a useful person
Rate is increased economic efficiency, while gas consumption when saving heating.
On the basis of existing heater for rolling steel 1, coal is saved by 2,500,000 tons of 1580 heating furnace annual output by above-mentioned optimization
Gas 3%, oxidization burning loss rate decline 0.20% and calculate, and following indexs can be realized under normal production scenarios：
(1) energy saving：Save 3% coal gas, ton steel burnup based on 1.1GJ/t, i.e., annual energy saving 1.1GJ/t × 3% ×
Ten thousand yuan of 2500000 tons × 26.8 yuan/GJ=221；
(2) oxidization burning loss：Decline based on 0.2% by oxidization burning loss rate, steel product valence presses 2000 yuan/ton, iron scale valence
Lattice are calculated by 500 yuan/ton, then 0.2% × 2,500,000 t × ten thousand yuan of (2000-500) member/t=750.To sum up, add up to mixed economy effect
Benefit is up to 9,710,000 yuan, and Static Recycling Period is within 1 year.
Schematically the utility model and embodiments thereof are described above, description is not limiting, attached drawing
Shown in also be the utility model one of embodiment, actual structure is not limited to this.So if this field
Those of ordinary skill enlightened by it, without deviating from the purpose of the present invention, not inventively design
Frame mode similar with the technical solution and embodiment, all should belong to the protection range of the utility model.
Claims (6)
1. a kind of heater for rolling steel combustion control system, including heater for rolling steel (1), it is characterised in that further include：
Laser detection mechanism, the laser detection mechanism are used to detect the ingredient of heater for rolling steel (1) interior flue gas；
And temperature monitor (3), the temperature monitor (3) is for directly measuring billet surface temperature.
2. heater for rolling steel combustion control system according to claim 1, it is characterised in that：The heater for rolling steel (1)
It is divided into preheating section (101), heating one section (102), heating two sections (103), heating three sections (104) and soaking along its length
Section (105), the preheating section (101), heating one section (102), heating two sections (103), heating three sections (104) and soaking zone
(105) burner is separately installed on.
3. heater for rolling steel combustion control system according to claim 2, it is characterised in that：The laser detection mechanism packet
Several groups laser detection unit is included, every group of laser detection unit includes an O2Laser detection unit (201) and a CO laser
Detection unit (202).
4. heater for rolling steel combustion control system according to claim 3, it is characterised in that：The temperature monitor (3)
For infrared radiation thermometer, which is arranged at the top of heater for rolling steel (1)；The O2Laser detection unit (201) or
CO laser detections unit (202) includes Laser emission end, laser pick-off end and data acquisition unit, the Laser emission end and
Laser pick-off end is separately positioned in the both walls of heater for rolling steel (1) and the position at Laser emission end and laser pick-off end is higher than
The height of heater for rolling steel (1) interior steel billet offers the through-hole passed through for laser on the side wall of heater for rolling steel (1).
5. heater for rolling steel combustion control system according to claim 4, it is characterised in that：The preheating section (101) adds
It is separately installed at least one set of laser on hot one section (102), heating two sections (103), heating three sections (104) and soaking zone (105)
Detection unit.
6. heater for rolling steel combustion control system according to claim 5, it is characterised in that：The preheating section (101) adds
It is separately installed on hot one section (102), heating two sections (103), heating three sections (104) and soaking zone (105) at least one infrared
Temperature measurer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721557332.5U CN207635889U (en) | 2017-11-20 | 2017-11-20 | A kind of heater for rolling steel combustion control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721557332.5U CN207635889U (en) | 2017-11-20 | 2017-11-20 | A kind of heater for rolling steel combustion control system |
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| CN207635889U true CN207635889U (en) | 2018-07-20 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764076A (en) * | 2017-11-20 | 2018-03-06 | 马鞍山钢铁股份有限公司 | A kind of heater for rolling steel combustion control system and control method |
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- 2017-11-20 CN CN201721557332.5U patent/CN207635889U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107764076A (en) * | 2017-11-20 | 2018-03-06 | 马鞍山钢铁股份有限公司 | A kind of heater for rolling steel combustion control system and control method |
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