CN102175042B - Method for oven furnace or cold furnace ignition of heat-accumulating-type heating furnace totally adopting blast-furnace gas as fuel - Google Patents
Method for oven furnace or cold furnace ignition of heat-accumulating-type heating furnace totally adopting blast-furnace gas as fuel Download PDFInfo
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- CN102175042B CN102175042B CN201110000123A CN201110000123A CN102175042B CN 102175042 B CN102175042 B CN 102175042B CN 201110000123 A CN201110000123 A CN 201110000123A CN 201110000123 A CN201110000123 A CN 201110000123A CN 102175042 B CN102175042 B CN 102175042B
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Abstract
The invention belongs to the technical filed of combustion of a heating furnace, and relates to a method for oven furnace or cold furnace ignition of a heat-accumulating-type heating furnace totally adopting blast-furnace gas as fuel. The method is characterized by comprising the following steps: 1) arranging an electric resistance wire ignition device in a furnace of the heating furnace of the heat-accumulating-type heating furnace, in front of a spray nozzle of a blast-furnace gas ignition nozzle which is planed to be started first in ignition or in front of a spray nozzle of a blast-furnace gas regenerator chamber; and 2) electrifying and heating the electric resistance wire ignition device to form a stable ignition heat source when the combustion of a blast-furnace gas ignition oven furnace or a cold furnace ignition is heated up at the normal temperature, and interrupting the power supply of the electric resistance wire ignition device to stop working after a temperature region of autogenous ignition after the blast-furnace gas is sprayed into the furnace is formed when the furnace of the heating furnace is heated up to above 700 DEG C. When the method is applied to the oven furnace or cold furnace ignition of the heat-accumulating-type heating furnace totally adopting blast-furnace gas as fuel, the ignition operation process is simple, convenient and reliable to implement.
Description
Technical field
The invention belongs to the heating furnace field of combustion technology, the black furnace ignition method of the recuperative heater that to be specifically related to a kind of whole employing blast furnace gas be fuel.
Background technology
Blast furnace gas is as the by-product gas of steel plant; Because calorific value is lower; On heater for rolling steel no matter be directly burning or through preheater with air and gas preheating to certain temperature after-combustion, all be difficult to make fire box temperature to reach more than 1150 ℃, satisfy the temperature requirement that steel billet heats.The later stage nineties in last century; When domestic heater for rolling steel adopts blast furnace gas to be fuel; Basically all adopt the double heat storage type combustion technology that air and blast furnace gas are preheating to back entering burner hearth burning about 1000 ℃, satisfy the temperature requirement that steel billet heats in burner hearth; Simultaneously have significant flue gas waste heat recovery effect because two Regenerative Combustion Technology are used on heating furnace, the recuperative heater of the blast furnace gas that therefore burns has obtained application very widely on the heating furnace of steel rolling production-line at home.
Since the operating characteristic of recuperative heater be burner on the heating furnace body both walls with periodic burning---the work that commutates of flame-out mode; Therefore the recuperative heater of blast furnace gas of burning must be reach more than 700 ℃ in fire box temperature, blast furnace gas spray into burner hearth after under the condition of spontaneous combustion immediately, regenerative combustion system could drop into normally and move.If heating furnace adopts the igniter burner that is arranged on the body of heater directly to burn the blast furnace gas firing up and do not have steady fiery measure under the black furnace condition; Blast furnace gas burns flame-out easily under cold environmental conditions; And flame-out back is if can not in time close the igniter burner gas valve; Can make a large amount of blast furnace gas leakages and alluvial in burner hearth, cause operating personnel's gas poisoning even explosion accident.For the baker of newly-built recuperative heater, because the low-temperature zone burner hearth furnace drying time below 450 ℃ is very long, the blast furnace gas burning is not as there being steady fiery measure, and flame-out meeting is more frequent, and danger is bigger.
At present, in the recuperative heater of burning blast furnace gas, for the iron and steel enterprise that the high heating value gas condition is arranged, the heating furnace of the overwhelming majority all is provided with blast furnace gas and high heating value gas two cover gas supply systems.The blast furnace gas pipeline feed system is used for supplying with blast furnace gas to regenerative combustion system, satisfies the production needs of heating furnace high-temperature heating steel billet; High combustion value coal feed channel feed system is used for supplying with high heating value gas to the igniter burner that is arranged in the body of heater soaking zone; Realize smooth combustion and intensification under the burner hearth cryogenic conditions; Be raised to more than 700 ℃ in fire box temperature, after regenerative combustion system drops into stable operation, igniter burner can be closed.Some steel rolling workshop; Has only blast furnace gas owing to supply with the fuel of heating furnace; Heating furnace has to adopt the can liquefied gas to supply with the igniter burner burning; Or be employed in the mode of burner hearth internal combustion firewood, coke even diesel oil, and accomplish the low temperature igniting baker and the black furnace firing up of heating furnace, burner hearth is warmed up to more than 700 ℃ again regenerative combustion system is put into operation.
Above-mentioned recuperative heater is in the scheme that solves baker and low temperature firing up problem and taked, and to the steel rolling workshop of high heating value gas is arranged, heating furnace is provided with two, and to overlap gas supply systems be suitable; For not having high heating value gas, can only using the heating furnace of pure blast furnace gas, then must take other supplementary modes to guarantee that blast furnace gas is in burning of cryogenic conditions down-firing and intensification as fuel.If adopt the can liquefied gas to supply with igniter burner, the supply of can liquefied gas, on-the-spot pipe arrangement and layout are more numerous and diverse, and implementation cost is also than higher; Carry out firing up if be employed in the method for placing firewood, coke even diesel combustion in the burner hearth, owing to need the constantly artificial fuel that adds, labour intensity is very big, and site environment is dirty and messy, and implementation cost is also very high.
Summary of the invention
The black furnace ignition method of the recuperative heater that to the purpose of this invention is to provide a kind of whole employing blast furnace gas be fuel, this method are when black furnace is lighted a fire, and the ignition operation process is easy to implement, reliably.
For realizing above-mentioned purpose, the present invention has adopted following technical scheme: all adopting blast furnace gas is the black furnace ignition method of the recuperative heater of fuel, it is characterized in that it comprises the steps:
1) is in the heating furnace burner hearth of recuperative heater of fuel all adopting blast furnace gases, is provided with resistance wire heating igniter before the spout of the blast furnace gas igniter burner that plan is opened earlier when being positioned at igniting or before the spout of blast furnace gas regenerator;
When 2) under the condition that above-mentioned recuperative heater burner hearth is a normal temperature, burning blast furnace gas black furnace firing up; Resistance wire heating igniter is generated heat after energising and is formed stable high-temperature ignition thermal source; Blast furnace gas is being ejected on the resistance wire heating igniter fire burns; After can automatic ablaze temperature province after being raised to more than 700 ℃, forming blast furnace gas at the heating furnace burner hearth and spraying into burner hearth; The regenerative combustion system of burning blast furnace gas comes into operation, and the outage of resistance wire heating igniter quits work.
Described resistance wire heating igniter comprises resistance wire and porous refractory brick, and resistance wire is on porous refractory brick.
Beneficial effect of the present invention is:
1) be employed in before the spout of blast furnace gas igniter burner or be provided with the method for resistance wire heating igniter before the spout of blast furnace gas regenerator, it is simple in structure; Whole black furnace ignition operation process is easy to implement, lights a fire conveniently, uses reliable, with low cost.
2) this method recuperative heater that can to make whole employing blast furnace gases be fuel is under the condition of normal temperature state at burner hearth; The spout of blast furnace gas igniter burner or blast furnace gas regenerator can be stablized in burner hearth after directly lighting blast furnace gas, burning reliably; Burner hearth is warmed up to more than 700 ℃ smoothly, guarantees that regenerative combustion system is stable, put into operation reliably.
Description of drawings
The structural representation that Fig. 1 is the recuperative heater of fuel for whole employing blast furnace gases of the present invention.
Among the figure: 1-heating furnace body, 2-heating furnace burner hearth, 3-blast furnace gas regenerator; 4-air regenerator, 5-blast furnace gas igniter burner, 6-blast furnace gas pipeline system; 7-combustion air pipeline system; 8-air side smoke discharging pipe system, 9-coal gas side smoke discharging pipe system, 10-resistance wire heating igniter.
The specific embodiment
All adopting blast furnace gas is the black furnace ignition method of the recuperative heater of fuel, and it comprises the steps:
1) in the heating furnace burner hearth 2 of recuperative heater of burning blast furnace gas, be provided with resistance wire heating igniter 10 (concrete number confirms as required, has the 8 cover resistance wires igniters 10 of generating heat among Fig. 1) before the spout of plan is opened when being positioned at igniting blast furnace gas igniter burner 5 or before the spout of blast furnace gas regenerator 3;
2) be under the condition of normal temperature directly during burning blast furnace gas black furnace firing up at the heating furnace burner hearth 2 of above-mentioned recuperative heater; Resistance wire heating igniter 10 heating up after energising forms stable high-temperature ignition thermal source; Blast furnace gas is being ejected on the resistance wire heating igniter 10 stably fire burns; Be raised to more than 700 ℃ at the heating furnace burner hearth, blast furnace gas can automatic ablaze temperature province after spraying into the heating furnace burner hearth after; The regenerative combustion system of burning blast furnace gas comes into operation, and quits work after 10 outages of resistance wire heating igniter and is retained in the burner hearth.
The recuperative heater (as shown in Figure 1) that whole employing blast furnace gases of realizing said method are fuel, it comprises heating furnace body 1, blast furnace gas regenerator 3, air regenerator 4, blast furnace gas igniter burner 5, blast furnace gas pipeline system 6, combustion air pipeline system 7, air side smoke discharging pipe system 8, coal gas side smoke discharging pipe system 9; In the heating furnace body 1 is heating furnace burner hearth 2, and heating furnace burner hearth 2 is divided into some heat supply sections such as soaking zone, one section of heating, two sections of heating; Blast furnace gas regenerator 3, air regenerator 4 are installed on the both walls of heating furnace body 1, and blast furnace gas igniter burner 5 is installed on the headwall or side wall of soaking zone of heating furnace body 1; The spout of blast furnace gas regenerator 3, air regenerator 4 is connected with heating furnace burner hearth 2 respectively; Blast furnace gas pipeline system 6 is connected (supply blast furnace gas) with the coal gas interface of blast furnace gas regenerator 3, blast furnace gas igniter burner 5 respectively, combustion air pipeline system 7 be connected with the combustion air interface of air regenerator 4, blast furnace gas igniter burner 5 respectively (supply combustion air); Heating furnace burner hearth 2 is connected with air side smoke discharging pipe system 8 through air regenerator 4, is connected with coal gas side smoke discharging pipe system 9 through blast furnace gas regenerator 3.During the heating furnace operate as normal, discharge respectively by air side smoke discharging pipe system 8, coal gas side smoke discharging pipe system 9 spraying into the flue gas that produces after heating furnace burner hearth 2 internal combustion through the blast furnace gas after blast furnace gas regenerator 3, air regenerator 4 preheatings and combustion air.
Before the igniting of above-mentioned heating furnace, before the spout of the blast furnace gas igniter burner of plan when heating furnace burner hearth 2 is in normal temperature, to open earlier 5, be provided with the resistance wire igniter 10 of generating heat before the spout of blast furnace gas regenerator 3.
Described resistance wire heating igniter 10 adopts the porous refractory brick of being made by refractory material to wear around multiloop resistance wire and is made; Resistance wire energising back heating can be heated to the whole aglow condition of high temperature with porous refractory brick and (open corresponding blast furnace gas igniter burner or blast furnace gas regenerator; Blast furnace gas is ejected into and is burnt automatic fire burns on the red resistance wire heating igniter 10); Guarantee can be stable when blast furnace gas is ejected on the porous brick ignition, form stable igniting heat source body.Resistance wire heating igniter 10 is placed on the brick that refractory brick piles up stamps, and height can be adjusted as required, and electrified wire is drawn in burner hearth outside the stove and is connected with power supply.Resistance wire heating igniter 10 simple in structure can be arranged in the burner hearth Anywhere as required.
Open blast furnace gas igniter burner 5 or blast furnace gas regenerator 3 like needs, then switching on earlier accordingly starts corresponding resistance wire heating igniter 10, treats that feeding blast furnace gas after 10 heatings of resistance wire heating igniter redden gets final product smooth combustion.When the burner hearth of this heat supply section is warmed up to more than 700 ℃; Open regenerative combustion system, blast furnace gas and combustion air spray into burner hearth can be voluntarily fire burns, after the stable operation of regenerative combustion system input; Resistance wire heating igniter 10 can be cut off the power supply and quit work, and need not to remove.
Claims (2)
1. all adopting blast furnace gas is the black furnace ignition method of the recuperative heater of fuel, it is characterized in that it comprises the steps:
1) all adopting blast furnace gases to be in the heating furnace burner hearth (2) of recuperative heater of fuel, is being provided with the resistance wire igniter (10) of generating heat before the spout of plan is opened earlier when being positioned at igniting blast furnace gas igniter burner (5) or before the spout of blast furnace gas regenerator (3);
2) be under the condition of normal temperature during burning blast furnace gas black furnace firing up at the heating furnace burner hearth (2) of above-mentioned recuperative heater; Resistance wire heating igniter (10) is generated heat after energising and is formed stable high-temperature ignition thermal source; Blast furnace gas is ejected into resistance wire heating igniter (10) and is going up fire burns; After can automatic ablaze temperature province after being raised to more than 700 ℃, forming blast furnace gas at burner hearth and spraying into burner hearth, resistance wire heating igniter (10) outage quits work.
2. the black furnace ignition method of the recuperative heater that whole employing blast furnace gas according to claim 1 is a fuel; It is characterized in that: described resistance wire heating igniter (10) comprises resistance wire and porous refractory brick, and resistance wire is on porous refractory brick.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110000123A CN102175042B (en) | 2011-01-04 | 2011-01-04 | Method for oven furnace or cold furnace ignition of heat-accumulating-type heating furnace totally adopting blast-furnace gas as fuel |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110000123A CN102175042B (en) | 2011-01-04 | 2011-01-04 | Method for oven furnace or cold furnace ignition of heat-accumulating-type heating furnace totally adopting blast-furnace gas as fuel |
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| CN102175042A CN102175042A (en) | 2011-09-07 |
| CN102175042B true CN102175042B (en) | 2012-10-10 |
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| CN201110000123A Expired - Fee Related CN102175042B (en) | 2011-01-04 | 2011-01-04 | Method for oven furnace or cold furnace ignition of heat-accumulating-type heating furnace totally adopting blast-furnace gas as fuel |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103673620A (en) * | 2013-11-29 | 2014-03-26 | 中冶南方(武汉)威仕工业炉有限公司 | Self-heating blast-furnace gas oven unit |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102538469B (en) * | 2012-01-18 | 2014-06-25 | 中冶南方(武汉)威仕工业炉有限公司 | Method for arranging energy-saving oven pipes |
| CN102564134A (en) * | 2012-01-18 | 2012-07-11 | 中冶南方(武汉)威仕工业炉有限公司 | Energy-saving oven tube |
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| JP3373303B2 (en) * | 1994-07-27 | 2003-02-04 | 中外炉工業株式会社 | Operating method of regenerative heat storage combustion system |
| JP3052755B2 (en) * | 1994-10-07 | 2000-06-19 | 日本鋼管株式会社 | Ignition method of regenerative burner |
| JPH08291911A (en) * | 1995-04-21 | 1996-11-05 | Tokyo Gas Co Ltd | Regenerative combustion system |
| JP2008214670A (en) * | 2007-03-01 | 2008-09-18 | Chugai Ro Co Ltd | Continuous heating furnace |
| JP5051828B2 (en) * | 2007-03-19 | 2012-10-17 | 日本碍子株式会社 | Regenerative burner |
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Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2697469Y (en) * | 2003-07-24 | 2005-05-04 | 吴道洪 | Combined double preheating heat-storage type burner |
| CN201014448Y (en) * | 2007-03-20 | 2008-01-30 | 重庆赛迪工业炉有限公司 | Dual-regeneration type burner |
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| JP特开2008-214670A 2008.09.18 |
| JP特开2008-232474A 2008.10.02 |
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| JP特开平8-291911A 1996.11.05 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103673620A (en) * | 2013-11-29 | 2014-03-26 | 中冶南方(武汉)威仕工业炉有限公司 | Self-heating blast-furnace gas oven unit |
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