CN106440811A - Igniting device and ignition method for sintering - Google Patents

Igniting device and ignition method for sintering Download PDF

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Publication number
CN106440811A
CN106440811A CN201610931612.1A CN201610931612A CN106440811A CN 106440811 A CN106440811 A CN 106440811A CN 201610931612 A CN201610931612 A CN 201610931612A CN 106440811 A CN106440811 A CN 106440811A
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CN
China
Prior art keywords
ignition
burner
gas
sintering
igniting
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CN201610931612.1A
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Chinese (zh)
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CN106440811B (en
Inventor
张永中
张晓萍
曹建民
刘自民
李顺祥
周宗林
Original Assignee
马鞍山钢铁股份有限公司
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Priority to CN201610931612.1A priority Critical patent/CN106440811B/en
Publication of CN106440811A publication Critical patent/CN106440811A/en
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Publication of CN106440811B publication Critical patent/CN106440811B/en

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    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27BFURNACES, KILNS, OVENS, OR RETORTS IN GENERAL; OPEN SINTERING OR LIKE APPARATUS
    • F27B21/00Open or uncovered sintering apparatus; Other heat-treatment apparatus of like construction
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23DBURNERS
    • F23D14/00Burners for combustion of a gas, e.g. of a gas stored under pressure as a liquid
    • F23D14/46Details, e.g. noise reduction means
    • F23D14/48Nozzles
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F23COMBUSTION APPARATUS; COMBUSTION PROCESSES
    • F23QIGNITION; EXTINGUISHING-DEVICES
    • F23Q2/00Lighters containing fuel, e.g. for cigarettes
    • F23Q2/16Lighters with gaseous fuel, e.g. the gas being stored in liquid phase
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F27FURNACES; KILNS; OVENS; RETORTS
    • F27DDETAILS OR ACCESSORIES OF FURNACES, KILNS, OVENS, OR RETORTS, IN SO FAR AS THEY ARE OF KINDS OCCURRING IN MORE THAN ONE KIND OF FURNACE
    • F27D13/00Apparatus for preheating charges; Arrangements for preheating charges

Abstract

The invention discloses an igniting device and an ignition method for sintering and belongs to the field of iron smelting of a blast furnace. The igniting device disclosed by the invention comprises an ignition furnace, a gas charging pipe and a hot air charging pipe; a row of burner nozzles are arranged on a part, at an ignition section of the ignition furnace, of the furnace top; the middle burner nozzles are arranged linearly; the burner nozzles close to the two sides of a sintering machine trolley are arranged in an arc shape; each burner nozzle communicates with the gas charging pipe and the hot air charging pipe respectively; the parts, at the front end and the rear end of the ignition section, of the furnace top are each provided with an isolation chamber; each isolation chamber communicates with the hot air charging pipe; an air box is arranged at the bottom of the ignition furnace, wherein a retarder is arranged inside the air tank under the burner nozzles. The igniting device disclosed by the invention has the advantages of optimizing distribution of an igniting fuel on an overall sintering material surface, balancing the ignition quality of sintering materials at all positions of a sintering machine, improving the quality of sintered ore products, also enhancing the ignition effect, reducing consumption of the igniting fuel and satisfying the production process requirements on energy conservation and environmental protection.

Description

A kind of sintering ignition device and ignition method
Technical field
The present invention relates to technical field of blast furnace ironmaking, more particularly, it relates to a kind of sintering ignition device and ignition method.
Background technology
Sintering circuit is the big power consumer that iron and steel produces, and mainly includes solid burnup, coal gas burnup, power consumption, wherein solid Fuel consumption accounts for 75%, and power consumption accounts for 15%, and gas consumption accounts for 6%.In sintering process, the purpose of igniting is to provide to mix Close the enough heat in material top layer so as in solid fuel ignition, make high temperature in lighter for the top layer compound simultaneously The lower dry, decarburization of flue gas effect and sintering, and so that sintering process is persistently carried out from top to bottom by means of convulsion.
The construction of igniter and form are very big to the good bad influence of ignition operation, then directly affects sintering mineral products matter Amount and its energy resource consumption.Existing sintering ignition device is typically made up of igniting section and soaking zone two parts, igniting section and insulation Isolated by a refractory brickwork between section.But the high-temperature flue gas of section of lighting a fire during actual production are easily lost to insulation in a large number Section, causes unnecessary heat loss, ultimately increases gas consumption, improve enterprise's production capacity.Through retrieval, application publication number For the patent of " CN102798291A ", " CN104807326A ", all propose in igniting section front end or in igniting section and insulation Between section, one flexible gas curtain wall is set, makes to form separate space between igniting front end or igniting section and soaking zone Ignition furnace.Gas curtain wall in above-mentioned application case is to be formed by the blower blows cold air being arranged on sintering ignition furnace, Although this kind of gas curtain wall solves the problems, such as heat smoke convection current between section and soaking zone of lighting a fire to a certain extent, due to drum The gas blowing is cold air, unavoidably reduces charge level temperature, loses partial heat, and air-flow is susceptible to pulse, and leads to The gas curtain wall heterogeneity being formed on charge level, isolation effect is significantly it is still necessary to optimize further.
The layout design of sintering ignition furnace burner there is also considerable influence to the quality of ignition operation, current first burner Structure design makes the efficiency of combustion of coal gas and burning velocity can not effectively improve, and energy-saving effect is not notable;Secondly, existing sintering The burner of ignition furnace mostly is two row or multi-row, is all arranged in the mutually level same level of charge level, sintering pallet Edge effect be easily caused that sintering pallet both sides heat supplies is not enough, the carbon on part bed of material surface is difficult to light, and sintering deposit Along the inhomogenous problem of chassis width quality.Through retrieval, during the application case of the patent No. " ZL2009200200178 " discloses Between burner be arranged in a linear, near two ends burner curved arrangement it is ensured that sintering feed reaches along along chassis width simultaneously The scheme of terminal.Application publication number be " CN104807326A " patent then propose igniting section furnace roof set up a more than row Standby burner, standby burner is less with a distance from normal charge level than the normal burner of igniting section, using standby burner when charge level declines, reaches Adapt to charge level change to burner, remain optimum igniting distance, the scheme of reduction gas consumption.But this standby burner exists for a long time Burner hearth high temperature is toasted, and easily damages, and the conversion of normal burner and standby burner is using relatively complicated.The patent No. " ZL892092181 " discloses a kind of curtain-type lighter, and the length of flame can be borrowed once, the proportion adjustment of secondary air flow, flame The regulation of length is Normal practice in sintering ignition furnace industry, but facts have proved that the distance that flame can elongate is shorter, and Gas consumption is high.
In sum, although current sintering ignition device species is various, design is different, and generally existing ignition quality is not Height, leads to sinter that energy resource consumption is higher, the deficiency limited by Sintering Operation Index then, how to effectively improve Sintering Operation Index simultaneously Rationally reducing its energy resource consumption becomes the Main way of development in industry.
Content of the invention
1. invent technical problem to be solved
Present invention aims to the deficiencies in the prior art, provide a kind of sintering ignition device and igniting side Method, the igniter of the present invention can optimize igniter fuel in the whole distribution sintering charge level, and contributes to reducing igniter fuel Consume, then can significantly improve ignition results using the ignition method that this igniter is carried out, equilibrium sintering machine sinters shots everywhere Fiery quality, thus improving Sintering Operation Index, and reaches the manufacturing technique requirent of energy-conserving and environment-protective.
2. technical scheme
For reaching above-mentioned purpose, the technical scheme that the present invention provides is:
A kind of sintering ignition device of the present invention, including ignition furnace, also includes gas inlet pipe and hot blast air inlet pipe, described One row's burner is provided with the igniting section furnace roof of ignition furnace, each burner is respectively connected with gas inlet pipe and hot blast air inlet pipe Logical;It is provided with isolation room, this isolation room is connected with hot blast air inlet pipe on the front and back ends of described igniting furnace igniting section furnace roof;
Described igniting furnace bottom is provided with bellows, is wherein located in the bellows immediately below burner and is provided with spoiler.
Further, above-mentioned row's burner is in middle part straight line, the distribution of both sides camber line, and the linear type of burner at middle part is uniform It is spaced, near the curved arrangement of burner of sintering pallet both sides, and the height apart from sintering feed surface for the both sides burner is little In the height apart from sintering feed surface for the middle burner.
Further, described bellows are infundibulate, and bellows are S in the sectional area of spoiler installed position, spoiler Upper surface area is then 40%~60%S.
Further, it is additionally provided with flap valve below spoiler in described bellows.
Further, the igniting section furnace roof of described ignition furnace is provided with heat-insulation layer, the outlet side of burner is embedded in this insulation In layer, and insert depth is 15~25mm.
Further, described burner is internally provided with a central cavity, and the inside of this central cavity is gas passage, in this Surround air duct between the outer wall of chambers of the heart body and the outer wall of burner, the outer wall of this central cavity and the outer wall of burner are respectively provided with There is spinning disk, spinning disk flow direction of air along along passage is obliquely installed, outside the spinning disk on central cavity outer wall and burner Spinning disk on wall is staggered successively.
Further, described gas inlet pipe includes gas main, and this gas main is connected with coal gas supervisor, coal gas master Multiple gas manifolds are provided with pipe, each gas manifold is provided with gas distributor, this gas distributor is communicated with Multiple branch gas tubes, the connection corresponding with the gas passage of burner of each branch gas tube.
Further, described hot blast air inlet pipe includes hot air source pipeline, and one end of this hot air source pipeline sequentially passes through blower fan With sedimentation dirt pocket, finally it is connected with the blowdown stack of central cooler, the other end of hot air source pipeline is provided with three hot blasts It is in charge of;Wherein two hot blasts are in charge of connection corresponding with the isolation room of igniting section furnace roof front and back ends respectively, and another hot blast is in charge of It is provided with multiple hot blast manifolds, the connection corresponding with the air duct of burner of each hot blast manifold.
Further, described isolation room includes being in charge of, with hot blast, the passage being connected, and this passage extends to ignition furnace Furnace roof inwall, and the bottom of passage is provided with surge chamber, and the bottom of this surge chamber offers the spout of strip, and hot blast divides Hot blast in pipe enters surge chamber through passage, and is finally sprayed by spout.
A kind of sintering ignition method of the present invention, using sintering ignition device as above, step is as follows:
Preheating in step one, ignition furnace, hot air source pipeline extracts in the blowdown stack of central cooler temperature for 130 DEG C~ 300 DEG C of high-temperature flue gas, flue gas carries out purified treatment and pressurization, a part of high-temperature flue gas warp through sedimentation dirt pocket and blower fan successively Hot blast is in charge of feeding isolation room, and a part of high-temperature flue gas send into the air duct of each burner through hot blast manifold, in ignition furnace Sintering feed preheated;
Sprayed by spout after the indoor high-temperature flue gas buffered room buffering of step 2, isolation, and the surface phase with sintering feed Contact, forms hot blast divider wall in the front and back ends of igniting section;
It is passed through igniting coal gas, coal gas is first responsible for through coal gas and is entered gas manifold in step 3, gas main, then by coal gas After allotter is evenly distributed, send into the gas passage of each burner through branch gas tube, you can negative pressure igniting is carried out to burner, During igniting, to carry out convulsion all the time combustion-supporting for the bellows of ignition furnace bottom.
3. beneficial effect
The technical scheme being provided using the present invention, compared with prior art, has following remarkable result:
(1) a kind of sintering ignition method of the present invention, both can optimize the distribution on whole sintering feed surface for the igniter fuel, carry High ignition results, equalize sintering machine sintering feed ignition quality everywhere, improve Sintering Operation Index, again can be to central cooler high-temperature flue gas Carry out heat recovery, also can improve ignition results, reduce the consumption of igniter fuel, contribute to reaching the production of energy-conserving and environment-protective Technological requirement.
(2) a kind of sintering ignition device of the present invention, is vertically arranged row's burner, the burner of centre on igniting section furnace roof Linearly type uniform intervals arrangement, near the curved arrangement of burner of sintering pallet both sides, and the burner distance of arc shooting Burner in the middle of the aspect ratio of sintering feed is low, can effectively optimize the distribution on whole sintering feed surface for the igniter fuel, it is to avoid burn Knot machine trolley both sides heat supply deficiency, part bed of material surface are difficult to the problem lighted, and improve ignition results, and equilibrium sintering machine burns everywhere Ramming material ignition quality.
(3) a kind of sintering ignition device of the present invention, burner is internally provided with a central cavity, the inside of this central cavity For gas passage, between the outer wall of this central cavity and the outer wall of burner, surround air duct, hot blast air and coal can be passed through Gas mixes, and the outer wall of this central cavity and the outer wall of burner is provided with spinning disk, the flowing of spinning disk air along along passage Direction is obliquely installed, and the spinning disk on central cavity outer wall is staggered successively with the spinning disk on burner outer wall, this kind of structure Design can be strengthened hot blast air and mix with the uniform of coal gas, prevent burner from blocking, effectively improve efficiency of combustion and the combustion of coal gas Burn speed, improve burner hearth firing temperature, reduce gas consumption.
(4) a kind of sintering ignition device of the present invention, is provided with spoiler and turnover panel in the bellows immediately below burner Valve, flap valve is located at below spoiler, can effectively reduce ignition zone below burner by the cooperation of spoiler and flap valve Convulsion area and convulsion amount, realize ignition zone lower negative pressure igniting, igniting when so that sintering machine table top air volume adjustment is more closed Reason, reduces air exhauster power consumption, and can make that high temperature torch is full and uniform with sintering feed to be contacted, heat concentration, and sinter bed can fill Divided combustion, and gas consumption amount is greatly decreased, ignition quality is higher.
(5) a kind of sintering ignition device of the present invention, the igniting section front and back ends furnace roof of ignition furnace is respectively arranged with isolation Room, for spraying high-temperature flue gas in igniting section front and back ends, forms homogeneous, stable hot blast divider wall, and thin-skinned with sintering feed connects Touch, the high-temperature flue gas that this hot blast divider wall can be prevented effectively from igniting section are lost to soaking zone, reduce due to heat loss cause more Unnecessary gas consumption.
(6) a kind of sintering ignition device of the present invention, isolation room includes passage, surge chamber and spout, purifies through depositing dust Process, pressurization after high-temperature flue gas through passage enter surge chamber, reduce gas after stably sprayed by spout, formation soft Property hot blast divider wall equalization stable, and thin-skinned with sintering feed contact, be prevented effectively from gas curtain wall heterogeneity, isolation effect unstable Problem.
Brief description
Fig. 1 is a kind of structural representation of sintering ignition device of the present invention;
Fig. 2 is the mplifying structure schematic diagram of ignition furnace in the present invention;
Fig. 3 is Section A-A figure in Fig. 1;
Fig. 4 is section B-B figure in Fig. 1;
Fig. 5 is C-C sectional view in Fig. 1;
Fig. 6 is the internal structure schematic diagram of burner in the present invention.
Label declaration in schematic diagram:1st, central cooler;2nd, blowdown stack;3rd, settle dirt pocket;4th, blower fan;5th, hot blast source capsule Road;6th, ignition furnace;7th, burner;8th, isolation room;9th, sintering feed;10th, spinning disk;11st, surge chamber;12nd, passage;13rd, spout; 14th, spoiler;15th, bellows;16th, hot blast is in charge of;17th, hot blast manifold;18th, first flow regulating valve;19th, gas main;20th, coal Gas stop valve;21st, coal gas supervisor;22nd, second flow regulating valve;23rd, gas manifold;24th, gas distributor;25th, flap valve; 26th, branch gas tube.
Specific embodiment
For further appreciating that present disclosure, in conjunction with accompanying drawing, the present invention is described in detail.
With reference to embodiment, the invention will be further described.
Embodiment 1
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, a kind of sintering ignition device of the present embodiment, including ignition furnace 6, Gas inlet pipe and hot blast air inlet pipe, ignition furnace 6 includes light a fire section and soaking zone, wherein divides on the front and back ends furnace roof of igniting section It is not provided with isolation room 8, this isolation room 8 is connected with hot blast air inlet pipe.A row is vertically arranged on ignition furnace 6 igniting section furnace roof Burner 7, is provided with 12 burners, the middle linear type uniform intervals of eight burners 7 arrange, near sintering as shown in Figure 2 altogether In the middle of latter two curved arrangement of burner 7 of machine trolley both sides, and the aspect ratio apart from sintering feed 9 surface for the burner 7 of both sides Low 10~the 20mm of burner 7, the specifically burner 7 in the middle of the aspect ratio apart from sintering feed 9 surface for the burner 7 of both sides in the present embodiment Low 10mm.It is provided with heat-insulation layer on igniting section furnace roof, the outlet side of burner 7 is embedded in this heat-insulation layer in the present embodiment, and embedded Depth is 15mm.Burner 7 embeds in heat-insulation layer, does not stretch into inside burner hearth, can be prevented effectively from the baking to burner 7 for the combustion flame Roasting infringement.Burner 7 in the present embodiment is arranged on the different level of sintering feed 9 differing heights, and the burner 7 of both sides Curved distribution, single burner 7 can meet igniting demand, and can effectively optimize igniter fuel whole sintering charge level point Cloth, it is to avoid sintering pallet both sides heat supply deficiency, part bed of material surface are difficult to the problem lighted, improves ignition results, and equilibrium is burnt Knot machine sintering feed ignition quality everywhere.
In the present embodiment, burner 7 is internally provided with a central cavity, and the inside of this central cavity is the coal passing through that gives gas Gas passage, surrounds the air duct passing through for combustion air, gas passage between the outer wall of the outer wall of this central cavity and burner 7 It is connected with gas inlet pipe, air duct is connected with hot blast air inlet pipe;What deserves to be explained is, the outer wall of this central cavity with Spinning disk 10 is provided with the outer wall of burner 7, spinning disk 10 flow direction of air along along passage is obliquely installed, central cavity Spinning disk 10 on outer wall is staggered successively with the spinning disk 10 on burner 7 outer wall, as shown in fig. 6, spinning disk 10 adopts this Before and after kind, double mistake formula arrangements, can strengthen hot blast air and mix with the uniform of coal gas, prevent burner 7 from blocking, effectively improve coal gas Efficiency of combustion and burning velocity, improve burner hearth firing temperature, reduce gas consumption.
Gas inlet pipe in the present embodiment includes gas main 19, as shown in figure 3, this gas main 19 and coal gas supervisor 21 are connected, and are provided with gas stop valve 20 and second flow regulating valve 22, just between gas main 19 and coal gas supervisor 21 Circulation and flow in control and regulation coal gas;It is provided with multiple gas manifolds 23, on each gas manifold 23 on coal gas supervisor 21 Be provided with gas distributor 24, this gas distributor 24 be communicated with multiple branch gas tubes 26, each branch gas tube 26 with burn The corresponding connection of gas passage in mouth 7, for being passed through coal gas, and the coal gas intake of each branch gas tube 26 into burner 7 Can be effectively controlled, rationally ensure the equilibrium of coal gas intake in multiple burners 7.
Hot blast air inlet pipe in the present embodiment includes hot air source pipeline 5, is provided with anti-corrosion, wearing layer inside hot air source pipeline 5, Outside is provided with heat insulation layer, and serviceability is excellent, and as shown in Figure 1 and Figure 2, one end of this hot air source pipeline 5 sequentially passes through wind Machine 4 and sedimentation dirt pocket 3, are finally connected with the blowdown stack 2 of central cooler 1, the other end of hot air source pipeline 5 are provided with three Root hot blast is in charge of 16, and hot air source pipeline 5 and hot blast are in charge of between 16 and are provided with first flow regulating valve 18, are easy to control hot air flow Amount;Wherein two hot blasts be in charge of 16 respectively the corresponding isolation room 8 with section furnace roof front and back ends of lighting a fire be connected, another hot blast divides Multiple hot blast manifolds 17 are provided with pipe 16, the connection corresponding with the air duct in burner 7 of each hot blast manifold 17.
Ignition furnace 6 bottom is provided with the bellows 15 of multiple convulsion, and multiple bellows 15 are connected with windlass main respectively, take out Wind house steward be connected with air exhauster, and the design of bellows 15 is to carrying out convulsion in ignition furnace 6, keep the negative pressure state in ignition furnace 6, Accelerate material sintering rate, improve caking power.What deserves to be explained is, it is located at the bellows 15 immediately below burner 7 in the present embodiment Inside it is provided with spoiler 14, bellows 15 are funnel-shaped structure, and spoiler 14 is installed on inside the funnel structure of bellows 15, bellows 15 It is S in the sectional area of this installed position, the upper surface area of spoiler 14 is then that (in the present embodiment, spoiler 14 is 40%S Cuboid platy structure), that is, make the wind resistance area of spoiler 14 account for the 40% of bellows 15 draught area, also set in this bellows 15 It is equipped with flap valve 25, flap valve 25 is located at below spoiler 14, the present embodiment passes through spoiler 14 and the cooperation of flap valve 25 can With effective convulsion area reducing burner 7 lower section ignition zone and convulsion amount, realize the lower negative pressure igniting of ignition zone, bellows 15 Suction pressure have extreme influence to ignition quality, suction pressure is too high, igniting draft bigger, easily by sintering feed 9 take out tightly, burning Knot rate reduction, and negative pressure is higher, igniting depth is deeper, and combustion zone is wider, and ignition heat is pumped quickly it is difficult to concentrate, and leads Cause ignition quality low and gas using quantity is big, increased energy consumption, have a strong impact on sintering quality.
For realizing high-quality lower negative pressure igniting, also have in industry and adjust suction pressure using by arranging flap valve 25 , but inventor finds to be controlled convulsion area, adjusted the effect of suction pressure by the aperture of flap valve 25 in production practices Really unsatisfactory, the aperture size of flap valve 25 is difficult to precise control, and convulsion bulk cargo is easily caused suction opeing blocking.Inventor Be additionally provided with spoiler 14 above flap valve 25, spoiler 14 is fixed in bellows 15, the length of spoiler 14 with sintering platform Vehicle-width is suitable, and the wind resistance area of spoiler 14 accounts for the 40% of bellows 15 draught area, and designing of spoiler 14 itself is existing Effect decreases the convulsion area of bellows 15, reduces the air quantity in bellows 15 below ignition zone, reduces ignition furnace 6 intrinsic pressure Power, even if flap valve 25 standard-sized sheet also enables lower negative pressure igniting, is not in more suction opeing clogging.Spoiler 14 and turnover panel Valve 25 matches and is more conducive to improve windproof effect, makes sintering machine table top air volume adjustment more reasonable in igniting, reduces air exhauster Power consumption.Distinguished and admirable stopped by spoiler 14 after flow downward from its both sides of the edge, a part is direct at opening through flap valve 25 Take away, the flap valve 25 that is inclined by of a part is blocked in flap valve 25 top, issues angry flow disturbance in suction draught, contribute to into One step slows down convulsion speed, ensures the formation of lower negative pressure environment in ignition zone.Adopt the structure design so that igniting when fire Flame suitable length, high temperature torch is full and uniform with sintering feed 9 to be contacted, and heat is concentrated, and sintering feed 9 can fully burn, and coal gas Consumption is greatly decreased, and ignition quality is higher.
A kind of sintering ignition method of the present embodiment, step is as follows:
Step one, first ignition furnace 6 is preheated, hot air source pipeline 5 extracts temperature in the blowdown stack 2 of central cooler 1 Spend the high-temperature flue gas for 130 DEG C~300 DEG C, flue gas carries out purified treatment and pressurization through sedimentation dirt pocket 3 and blower fan 4 successively, one Part high-temperature flue gas are in charge of 16 feeding isolation rooms 8 through hot blast, and a part of high-temperature flue gas send into each burner 7 through hot blast manifold 17 Air duct, preheats to the sintering feed 9 in ignition furnace 6;
High-temperature flue gas in step 2, isolation room 8 are sprayed and are contacted with the surface of sintering feed 9, in the front and back ends of igniting section Form hot blast divider wall;
It is passed through igniting coal gas, coal gas first enters gas manifold 23 through coal gas supervisor 21 in step 3, gas main 19, then After being evenly distributed, send into the gas passage of each burner 7 by gas distributor 24 through branch gas tube 26, you can to burner 7 Carry out negative pressure igniting, during igniting, to carry out convulsion all the time combustion-supporting for the bellows 15 of ignition furnace 6 bottom.
This kind of ignition method can reduce the input to traditional cold air heating apparatus, again can be to central cooler 1 high-temperature flue gas Carry out heat recovery, also can reduce the consumption of igniter fuel, contribute to realizing the manufacturing technique requirent of energy-conserving and environment-protective.This reality Apply example pre-heat effect is dried using hot blast good, moisture-free, be difficult overly moist, improve breathability and the temperature of sinter bed Degree, can effectively save the subsequent combustion energy, sintering effect is good;And full combustion of fuel, work can be effectively ensured using hot wind for combustion supporting Change combustion process, also can provide a number of thing calorimetric for burner hearth, raise furnace temperature, and hot air source can have through sedimentation dirt pocket 3 Effect purifies dust granules in waste gas, it is to avoid plant maintenance is had a negative impact.The ignition method of the present embodiment is suitable for use with The sintering ignition technique of the gaseous fuels such as the blast furnace gas of different calorific values, mixed gas, coke-stove gas.
It is respectively arranged with isolation room 8 on the igniting section front and back ends furnace roof of ignition furnace 6, this isolation room 8 adopts in the present embodiment Heat resisting steel is made, and for spraying high-temperature flue gas in igniting section front and back ends, forms homogeneous, stable hot blast divider wall, and with sintering The soft contact of charge level, this hot blast divider wall not only solves the problem of heat smoke convection current between igniting section and soaking zone, forward and backward puts Hot blast divider wall also has hot air drying preheating and heat insulation function, and takes up room little due to it, can avoid because of preheating and drying section Long and take effective sintering area, also can solve the problem that the flame of igniting section sprays from entrance point and scaling loss head cloth sets simultaneously Standby problem.
Embodiment 2
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, a kind of sintering ignition device of the present embodiment, its basic structure is same Embodiment 1, except that the length of ignition furnace 6 accounts for the 14%~20% of sintering machine body length in the present embodiment, its igniting The section height away from sintering feed 9 surface for the furnace roof is 800~900mm, and the isolation room 8 of front and back ends and the distance of central burner nozzle 7 are respectively 800~1000mm, 1300~1500mm.
Isolation room 8 in the present embodiment includes being in charge of 16 passages 12 being connected with hot blast, and this passage 12 extends to a little The furnace roof inwall of stove 6, and the bottom of passage 12 is provided with surge chamber 11, the bottom of this surge chamber 11 offers strip Spout 13, spout 13 forms one slit, and hot blast enters surge chamber 11 through passage 12, and final ejection by spout 13 forms heat Wind divider wall.As shown in Figure 4, Figure 5, isolation room 8 includes multiple passages 12 being independently arranged and surge chamber 11, purifies through depositing dust High-temperature flue gas after process, pressurization enter surge chamber 11 through passage 12, stablize ejection, shape by spout 13 after reducing gas Become flexible hot blast divider wall equalization stable, and soft with sintering feed 9 surface contact, be prevented effectively from gas curtain wall heterogeneity, isolation The unstable problem of effect.Surge chamber 11 is rectangular along pallet width section, the length of this rectangle with igniting section burner hearth width Quite, the width of rectangle is 10~50mm to degree.Depending on the number of surge chamber 11 is according to the width of pallet, set in the present embodiment It is set to 4, and the height of surge chamber 11 is 30~45mm;The length of spout 13 is suitable with the burner hearth of ignition furnace 6, the width of spout 13 Spend for 10~50mm, this spout 13 is integral type structure, and is provided with reinforcement gusset.
The igniter of the present embodiment takes up room little, both can optimize igniter fuel whole using the ignition method of this device The distribution of individual sintering charge level, improves ignition results, equalizes sintering machine sintering feed ignition quality everywhere, improve Sintering Operation Index, Heat recovery can be carried out to central cooler 1 high-temperature flue gas again, also can improve ignition results, reduce the consumption of igniter fuel, reach Manufacturing technique requirent to energy-conserving and environment-protective.
Below with certain steel mill 105m2As a example the igniter of sintering machine application the present embodiment exploitation and ignition method, with reality The condition of production applying before and after's half a year is that foundation carries out implementation result explanation:
Table 1 is the day production target meansigma methodss of half a year before and after enforcement, specific as follows:
Table 1 apparatus of the present invention implement forward and backward each production target situation of change
Firing temperature Gas flow Air mass flow EGT Blower fan electric current Tumbler index Small sintering ore rate
m3/h m3/h A % %
Before application 1047 815 4162 118 213 72.61 10.06
After application 1063 570 2693 121 200 72.34 9.17
Difference 16 -245 -1469 3 -13 -0.27 -0.89
Note:Each index implements the day production target meansigma methodss of forward and backward month for device above.
After the igniter of the present embodiment, single burner 7 is arranged on the different level away from sintering feed 9 differing heights On, make sintering feed 9 surface ignition intensity more sufficient, uniform, do not have " fulminant leucorrhagia with yellowish discharge " to occur;Using hot wind for combustion supporting igniting, and light a fire Homogeneous, the stable hot blast divider wall of section front and back ends setting, significantly improves ignition results, reduces gas consumption, as shown in table 1, Firing temperature improves 16 DEG C, and gas flow reduces 245m3/h;The matching design of spoiler 14 and flap valve 25 makes sintering during igniting Machine table top air volume adjustment is more reasonable, and blower fan power consumption reduces, and air mass flow reduces 1469m3/ h, blower fan current reduction 13A;Using this The ignition method of invention, Sintering Yield is obviously improved, and small sintering ore rate reduces by 0.89 percentage point.
The direct economic benefit that the ignition method of the present embodiment produces is as follows:
Gas saving:365 × 24h × 90% × 245m3/ h=1931580m3
Save power consumption:365 × 24h × 90% × 13A × 10000V ÷ 1000=1024920 kilowatt hour
Gas price presses 0.44 yuan/m3, electricity price press 0.6 yuan/kilowatt hour calculate, year reduces cost:1931580m3×0.44 Unit/m3+ 1024920 kilowatt hour × 0.6 yuan/kilowatt hour=146.48 ten thousand yuan, if popularization and application, its direct economic benefit is extremely aobvious Write.
Embodiment 3
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, a kind of sintering ignition device of the present embodiment, its basic structure is same Embodiment 2, except that the burner 7 in the middle of the aspect ratio apart from sintering feed 9 surface for the burner 7 of arc shooting in the present embodiment Low 20mm;The outlet side of burner 7 is embedded in this heat-insulation layer, and insert depth is 25mm;Bellows 15 are in spoiler 14 installation site The sectional area at place is S, and the upper surface area of spoiler 14 is 60%S, and that is, the wind resistance area of spoiler 14 accounts for bellows 15 ventilating surface Long-pending 60%;Isolation room 8 is made using heat-resistance stainless steel.
Embodiment 4
As shown in Figure 1, Figure 2, shown in Fig. 3, Fig. 4, Fig. 5, Fig. 6, a kind of sintering ignition device of the present embodiment, its basic structure is same Embodiment 2, except that burner 7 in the middle of the aspect ratio of sintering feed 9 for the burner 7 of arc shooting is low in the present embodiment 15mm;The outlet side of burner 7 is embedded in this heat-insulation layer, and insert depth is 20mm;Bellows 15 are in spoiler 14 installed position Sectional area be S, the upper surface area of spoiler 14 is 50%S, and that is, the wind resistance area of spoiler 14 accounts for bellows 15 draught area 50%.
Below schematically the present invention and embodiments thereof are described, this description does not have restricted, institute in accompanying drawing Show is also one of embodiments of the present invention, and actual structure is not limited thereto.So, if the common skill of this area Art personnel enlightened by it, in the case of without departing from the invention objective, designs and this technical scheme without creative Similar frame mode and embodiment, all should belong to protection scope of the present invention.

Claims (10)

1. a kind of sintering ignition device, including ignition furnace (6) it is characterised in that:Also include gas inlet pipe and hot blast air inlet pipe, One row's burner (7) is provided with the igniting section furnace roof of described ignition furnace (6), each burner (7) and gas inlet pipe and hot blast enter Trachea is connected respectively;It is provided with isolation room (8), this isolation room on the front and back ends of described ignition furnace (6) igniting section furnace roof (8) it is connected with hot blast air inlet pipe;
Described ignition furnace (6) bottom is provided with bellows (15), is wherein located in the bellows (15) immediately below burner (7) and is provided with resistance Stream plate (14).
2. a kind of sintering ignition device according to claim 1 it is characterised in that:Above-mentioned row's burner (7) is in middle part Straight line, the distribution of both sides camber line, burner (7) the linearly type uniform intervals arrangement at middle part, near the burner of sintering pallet both sides (7) height apart from sintering feed (9) surface for the curved arrangement, and both sides burner (7) is less than middle burner (7) apart from sintering feed (9) height on surface.
3. a kind of sintering ignition device according to claim 2 it is characterised in that:Described bellows (15) are infundibulate, wind Case (15) is S in the sectional area of spoiler (14) installed position, and the upper surface area of spoiler (14) is then 40%~60% S.
4. a kind of sintering ignition device according to claim 3 it is characterised in that:Described bellows (15) inherence spoiler (14) it is additionally provided with flap valve (25) below.
5. a kind of sintering ignition device according to claim 4 it is characterised in that:The igniting section stove of described ignition furnace (6) Heat-insulation layer is provided with top, the outlet side of burner (7) is embedded in this heat-insulation layer, and insert depth is 15~25mm.
6. according to claim 1 or 5 a kind of sintering ignition device it is characterised in that:Described burner (7) is internally provided with One central cavity, the inside of this central cavity is gas passage, surrounds between the outer wall of the outer wall of this central cavity and burner (7) Air duct, the outer wall of this central cavity and the outer wall of burner (7) is provided with spinning disk (10), spinning disk (10) is along passage The flow direction of interior air is obliquely installed, the spinning disk on the spinning disk (10) on central cavity outer wall and burner (7) outer wall (10) it is staggered successively.
7. a kind of sintering ignition device according to claim 6 it is characterised in that:It is total that described gas inlet pipe includes coal gas Pipe (19), this gas main (19) is connected with coal gas supervisor (21), and coal gas supervisor (21) is provided with multiple gas manifolds (23), each gas manifold (23) is provided with gas distributor (24), this gas distributor is communicated with multiple coals on (24) Gas branch pipe (26), each branch gas tube (26) connection corresponding with the gas passage of burner (7).
8. a kind of sintering ignition device according to claim 7 it is characterised in that:Described hot blast air inlet pipe includes hot air source Pipeline (5), one end of this hot air source pipeline (5) sequentially passes through blower fan (4) and sedimentation dirt pocket (3), final and central cooler (1) Blowdown stack (2) is connected, and the other end of hot air source pipeline (5) is provided with three hot blasts and is in charge of (16);Wherein two hot blasts It is in charge of that (16) are corresponding with the isolation room (8) of igniting section furnace roof front and back ends respectively to be connected, another hot blast is in charge of and is provided with (16) Multiple hot blast manifolds (17), each hot blast manifold (17) connection corresponding with the air duct of burner (7).
9. a kind of sintering ignition device according to claim 8 it is characterised in that:Described isolation room (8) includes and hot blast It is in charge of the passage (12) that (16) are connected, this passage (12) extends to the furnace roof inwall of ignition furnace (6), and passage (12) Bottom be provided with surge chamber (11), the bottom of this surge chamber (11) offers the spout (13) of strip, and hot blast is in charge of (16) In hot blast enter surge chamber (11) through passage (12), and final sprayed by spout (13).
10. a kind of sintering ignition method, using the sintering ignition device as described in any one of claim 1~9, step is as follows:
Preheating in step one, ignition furnace (6), hot air source pipeline (5) extracts temperature in the blowdown stack (2) of central cooler (1) and is 130 DEG C~300 DEG C of high-temperature flue gas, flue gas carries out purified treatment and pressurization through sedimentation dirt pocket (3) and blower fan (4) successively, and one Part high-temperature flue gas are in charge of (16) through hot blast and are sent into isolation room (8), and a part of high-temperature flue gas send into each through hot blast manifold (17) The air duct of burner (7), preheats to the sintering feed (9) in ignition furnace (6);
Sprayed by spout (13) after the buffered room of high-temperature flue gas (11) buffering in step 2, isolation room (8), and and sintering feed (9) surface contacts, and forms hot blast divider wall in the front and back ends of igniting section;
It is passed through igniting coal gas, coal gas first enters gas manifold (23) through coal gas supervisor (21) in step 3, gas main (19), The gas passage of each burner (7) after being evenly distributed, is sent into by gas distributor (24) again through branch gas tube (26), you can Negative pressure igniting is carried out to burner (7), during igniting, to carry out convulsion all the time combustion-supporting for the bellows (15) of ignition furnace (6) bottom.
CN201610931612.1A 2016-10-31 2016-10-31 A kind of sintering ignition device and ignition method CN106440811B (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107014205A (en) * 2017-04-14 2017-08-04 北京首钢自动化信息技术有限公司 A kind of sintering ignition furnace temperature automatic control power-economizing method
CN107631633A (en) * 2017-09-12 2018-01-26 首钢集团有限公司 Reduce the control method and sintering machine of sintering machine wind box negative pressure
CN109373772A (en) * 2018-09-25 2019-02-22 首钢集团有限公司 A kind of ignition furnace of sintering machine dross control device

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2424374Y (en) * 2000-05-24 2001-03-21 冶金工业部北京冶金设备研究院 Thermal storage burning nozzle
CN2713323Y (en) * 2004-05-18 2005-07-27 任志国 Novel ignition system for blast furnace gas sintering machine
CN201397042Y (en) * 2009-03-31 2010-02-03 高密市东冶机械制造有限公司 Long arc-shaped homogeneous ignition furnace
JP2011169570A (en) * 2010-02-22 2011-09-01 Jfe Steel Corp Sintering machine
CN202709739U (en) * 2012-06-08 2013-01-30 上海梅山钢铁股份有限公司 Ignition negative-pressure control device of sintering machine
CN104879793A (en) * 2015-05-21 2015-09-02 芜湖市环洲节能科技有限公司 Energy-saving stove and stove energy-saving method
CN206131733U (en) * 2016-10-31 2017-04-26 马鞍山钢铁股份有限公司 Sintering ignition

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN2424374Y (en) * 2000-05-24 2001-03-21 冶金工业部北京冶金设备研究院 Thermal storage burning nozzle
CN2713323Y (en) * 2004-05-18 2005-07-27 任志国 Novel ignition system for blast furnace gas sintering machine
CN201397042Y (en) * 2009-03-31 2010-02-03 高密市东冶机械制造有限公司 Long arc-shaped homogeneous ignition furnace
JP2011169570A (en) * 2010-02-22 2011-09-01 Jfe Steel Corp Sintering machine
CN202709739U (en) * 2012-06-08 2013-01-30 上海梅山钢铁股份有限公司 Ignition negative-pressure control device of sintering machine
CN104879793A (en) * 2015-05-21 2015-09-02 芜湖市环洲节能科技有限公司 Energy-saving stove and stove energy-saving method
CN206131733U (en) * 2016-10-31 2017-04-26 马鞍山钢铁股份有限公司 Sintering ignition

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107014205A (en) * 2017-04-14 2017-08-04 北京首钢自动化信息技术有限公司 A kind of sintering ignition furnace temperature automatic control power-economizing method
CN107014205B (en) * 2017-04-14 2019-10-08 北京首钢自动化信息技术有限公司 A kind of sintering ignition furnace temperature automatic control power-economizing method
CN107631633A (en) * 2017-09-12 2018-01-26 首钢集团有限公司 Reduce the control method and sintering machine of sintering machine wind box negative pressure
CN109373772A (en) * 2018-09-25 2019-02-22 首钢集团有限公司 A kind of ignition furnace of sintering machine dross control device

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