CN102364280A - Secondary combustion reduction heating furnace for layered furnace gas - Google Patents
Secondary combustion reduction heating furnace for layered furnace gas Download PDFInfo
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- CN102364280A CN102364280A CN2011100032850A CN201110003285A CN102364280A CN 102364280 A CN102364280 A CN 102364280A CN 2011100032850 A CN2011100032850 A CN 2011100032850A CN 201110003285 A CN201110003285 A CN 201110003285A CN 102364280 A CN102364280 A CN 102364280A
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Abstract
The invention relates to a secondary combustion deep reduction heating furnace for layered furnace gas, and relates to a heating device for reducing iron ores directly. The secondary combustion deep reduction heating furnace is characterized in that: the reduction furnace is divided into upper and lower layers in a mode of combining a heat accumulating type combustion technology and a furnace gas secondary combustion technology; on the upper layer, an opening combustion heating mode is used for controlling the furnace to be in a reducing atmosphere, so that the temperature of a reduction process is reached; and unburned combustible gas on the upper layer is cooled by an upper layer heat accumulating chamber and then is discharged to a lower layer combustion chamber for secondary combustion, so dual-surface heating is realized.
Description
Affiliated technical field
The present invention relates to a kind of heater that is applied in the refractory iron ore drastic reduction technology, this device also can be applicable to the direct reduction and the melting and reducing field of other iron ore simultaneously.
Background technology
At present, that China has is not optional in a large number, refractory iron ore and iron content mineral intergrowth resource, becomes can satisfy the iron ore concentrate of blast furnace needs owing to be difficult to the sorting enrichment, and fails to be exploited.Difficult ore dressing drastic reduction technology is a kind of new technology that can directly reduce difficult ore dressing, and key problem in technology wherein is the drastic reduction heating furnace.This technological requirement ore must heat under reducing atmosphere, so fuel can not completing combustion.The reduction furnace that uses at present has rotary hearth furnace, annular furnace, tunnel cave etc. all to use the mode of single face heating, in burner hearth, produces reducing atmosphere through the control wind supply quantity.This mode of heating has produced two drawbacks: 1. Deoxidation Atmosphere in Furnace is directly discharged and is caused the waste of great number of flammable gas to pollute simultaneously.Way at present commonly used is to build the reproducibility furnace gas that a stove discharges reduction furnace in addition to burn once more, and it is combustion-supporting to be used for reduction furnace with air recovery section heat.However, the overall thermal efficient of the reduction furnace preheating of this tyre air preheat stove is very low, invests higher.2. because reduction furnace adopts the single face heating, and the mixture coefficient of overall heat transmission of heated breeze and coal dust is low, causes the part thermal efficiency low, bottom object catch a cold furnace bottom to influence reduction effect bad.
Summary of the invention
The objective of the invention is to overcome that the existing reduction furnace thermal efficiency is low, complex equipments and the uneven deficiency of being heated.The present invention proposes the two-sided heating heat storage type combustion of a kind of controllable gas reduction furnace, has adopted following technology: two stoves that 1. will adopt usually unite two into one, and are two-layer about being divided into the combustion space, are the boundary with the pallet that carries ore.The combustion chamber, upper strata is in order to guarantee the reducing atmosphere in the space, and control upper furnace oxygen-supplying amount makes the fuel anoxycausis; The furnace gas that discharge above layer combustion chamber, lower floor combustion chamber is a fuel, and it is burnt again.2. go up lower hearth and all adopt the regenerative combustion technology heat supply, the characteristic through regenerator and reversing combustion realizes the transfer of the flammable furnace gas of upper furnace to lower hearth.
The invention has the beneficial effects as follows, both can guarantee the requirement of reducing atmosphere on the technology, the reducing atmosphere that can realize upper furnace again to reach the purpose of energy-saving and emission-reduction, makes that the material heating is more even at the lower hearth after-flame simultaneously.
Description of drawings
Below in conjunction with accompanying drawing the present invention is further specified.
Fig. 1 is a schematic diagram of the present invention.
Fig. 2 is a burner schematic diagram of the present invention.
Combustion chamber, 1. upper strata among the figure, 2. lower floor combustion chamber, 3. upper strata regenerator, 4. lower floor's regenerator, 5. raw material pallet; 6. water-cooled beam, 7. jet for gas, 8. sand seal device, 9. air nozzle, 10. burner block; 11. air-blaster, 12. upper strata regenerator reversal valves, combustion chamber, 13. upper strata air-introduced machine, 14. lower floor's regenerator reversal valves, 15. lower floor's combustion chamber air-introduced machines; 16. cut valve soon, 17, air, 18, coal gas.
The specific embodiment
In Fig. 1; Air gets into upper strata regenerator reversal valve (12) after coming out from air-blaster (11); Get into upper strata regenerator (3) through reversal valve along the direction of arrow among the figure; Be heated to from normal temperature about 1100 ℃ in upper strata regenerator (3) air, spray into combustion chamber, upper strata (1), mix with the coal gas of jet for gas (7) ejection and carry out diffusion combustion through air nozzle (9).Grate firing on this moment
The upper strata regenerator (3) on right side during the furnace gas that burns chamber (1) generation gets into and schemes; Through heat exchange; Furnace gas is reduced to about 150 ℃ from 1300 ℃; Get into upper strata regenerator reversal valve (12) along the direction of arrow among the figure, through combustion chamber, the upper strata reproducibility furnace gas of upper strata regenerator reversal valve (12) through the combustion chamber, upper strata air-introduced machine (13), act as a fuel along the direction of arrow and to supply with lower floor combustion chamber (2).The air that comes out from air-blaster (11) gets into lower floor's regenerator reversal valve (14); Through getting into lower floor's regenerator (4) along the direction of arrow among the figure after the reversal valve; Be heated to about 1100 ℃ from normal temperature in lower floor's regenerator (4) air; Spray into lower floor combustion chamber (2) through air nozzle (9), be mixed into capable diffusion combustion with combustion chamber, upper strata furnace gas.The flue gas that lower floor's this moment combustion chamber (2) produces gets into lower floor's regenerator (4) on right side among the figure; Through heat exchange; Flue gas is reduced to about 150 ℃ from 1300 ℃; Get into lower floor's regenerator reversal valve (14) along the direction of arrow among the figure, discharge by lower floor's combustion chamber air-introduced machine (15) through lower floor's regenerator reversal valve (14).
In Fig. 2, air (17) gets into upper strata regenerator (3), is preheating to about 1100 ℃ from normal temperature, through air nozzle (9) ejection; Coal gas (18) is sprayed by the jet for gas (7) in the burner block (10) through the too fast valve (16) of cutting.Air and coal gas are ejected back mixing carrying out diffusion combustion.Burner block (10) reserves air nozzle (9) and jet for gas (7) in manufacturing process, make whole burner compact more.
Claims (6)
1. reduction heater that is applied in the iron ore drastic reduction is characterized in that: be divided into two-layerly up and down in the stove combustion chamber, the combustion chamber, upper strata guarantees reducing atmosphere, and the furnace gas that discharge above layer combustion chamber, lower floor combustion chamber is a fuel, and it is burnt again.
2. heating furnace according to claim 1 is characterized in that: combustion system adopts regenerative combustion technology, and the combustible gas that the upper strata, combustion chamber is unburnt is discharged to the lower floor combustion chamber and accomplishes second-time burning through after the regenerator.
3. heating furnace according to claim 1 is characterized in that: for guaranteeing the reducing atmosphere of combustion chamber, upper strata better, jet for gas is arranged in bed of material top, air port is arranged in the jet for gas top.
4. lower floor's combustion system is a heat storage type combustion.
5. heating furnace according to claim 1 is characterized in that: the raw material pallet adopts the high temperature resistant goods of carborundum, and arranged beneath water-cooled beam supports.
6. heating furnace according to claim 1 is characterized in that: the sand seal form is adopted in the sealing of upper and lower layer combustion chamber.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100032850A CN102364280A (en) | 2011-01-10 | 2011-01-10 | Secondary combustion reduction heating furnace for layered furnace gas |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011100032850A CN102364280A (en) | 2011-01-10 | 2011-01-10 | Secondary combustion reduction heating furnace for layered furnace gas |
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| Publication Number | Publication Date |
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| CN102364280A true CN102364280A (en) | 2012-02-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011100032850A Pending CN102364280A (en) | 2011-01-10 | 2011-01-10 | Secondary combustion reduction heating furnace for layered furnace gas |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716852A (en) * | 2018-06-13 | 2018-10-30 | 佛山市中晨窑炉设备有限公司 | A kind of kiln firing oxidation panel secondary combustion system |
| CN111474207A (en) * | 2020-05-03 | 2020-07-31 | 华中科技大学 | Experimental device for be used for studying buggy and living beings mixing burning |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529087A (en) * | 2003-10-08 | 2004-09-15 | 张卫军 | Industrial furnace coal-fired gasifying heat-stroage type combustion system |
| CN101012927A (en) * | 2007-02-13 | 2007-08-08 | 顾向涛 | Heat accumulation type low-oxidization heating furnace |
| CN201014431Y (en) * | 2007-02-13 | 2008-01-30 | 顾向涛 | Regenerative less oxidation combustion furnace |
| CN201024201Y (en) * | 2007-04-02 | 2008-02-20 | 贵州世纪天元矿业有限公司 | Heat-storage reduction oven for vacuum metal smelting |
| CN201313924Y (en) * | 2008-08-27 | 2009-09-23 | 北京京杰锐思技术开发有限公司 | Heat storage type heating furnace without oxidization |
-
2011
- 2011-01-10 CN CN2011100032850A patent/CN102364280A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1529087A (en) * | 2003-10-08 | 2004-09-15 | 张卫军 | Industrial furnace coal-fired gasifying heat-stroage type combustion system |
| CN101012927A (en) * | 2007-02-13 | 2007-08-08 | 顾向涛 | Heat accumulation type low-oxidization heating furnace |
| CN201014431Y (en) * | 2007-02-13 | 2008-01-30 | 顾向涛 | Regenerative less oxidation combustion furnace |
| CN201024201Y (en) * | 2007-04-02 | 2008-02-20 | 贵州世纪天元矿业有限公司 | Heat-storage reduction oven for vacuum metal smelting |
| CN201313924Y (en) * | 2008-08-27 | 2009-09-23 | 北京京杰锐思技术开发有限公司 | Heat storage type heating furnace without oxidization |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108716852A (en) * | 2018-06-13 | 2018-10-30 | 佛山市中晨窑炉设备有限公司 | A kind of kiln firing oxidation panel secondary combustion system |
| CN111474207A (en) * | 2020-05-03 | 2020-07-31 | 华中科技大学 | Experimental device for be used for studying buggy and living beings mixing burning |
| CN111474207B (en) * | 2020-05-03 | 2021-07-02 | 华中科技大学 | Experimental device for be used for studying buggy and living beings mixing burning |
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Application publication date: 20120229 |
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