CN103791719A - Horizontal gasification cooling furnace and high-temperature direct reduction material gasification cooling method with the same - Google Patents
Horizontal gasification cooling furnace and high-temperature direct reduction material gasification cooling method with the same Download PDFInfo
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- CN103791719A CN103791719A CN201410041620.XA CN201410041620A CN103791719A CN 103791719 A CN103791719 A CN 103791719A CN 201410041620 A CN201410041620 A CN 201410041620A CN 103791719 A CN103791719 A CN 103791719A
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Abstract
The invention discloses a horizontal gasification cooling furnace which comprises a feeding opening, a coal gas outlet, a horizontal cooling device and a discharging opening. A feeding end of the horizontal cooling device is connected with the feeding opening and a coal gas outlet, discharging end is connected with the discharging opening, the horizontal height of the feeding end is higher than that of the discharging end, the horizontal cooling device is divided into a high-temperature zone, a middle-temperature zone and a low-temperature zone from the feeding end to the discharging end in sequence. The high-temperature zone is provided with a superheated steam inlet. The middle-temperature zone is provided with a blast furnace gas inlet. The low-temperature zone is provided with a furnace sleeve and a water spraying device. The horizontal cooling device is of an airtight structure. Direct reduction material of 1000 DEG C-1100 DEG C are added into the direct reduction material, superheated water steam is sprayed into the high-temperature zone, normal-temperature blast furnace gas is sprayed into the middle-temperature zone, and water is directly sprayed to a cylinder wall at the low-temperature zone for cooling.
Description
Technical field
This patent relates to metallurgical technology field, belongs to a kind of horizontal gasification cool furnace and for high-temperature direct reduction material gasification cooling means.
Background technology
In industrial production, high-temperature roasting material is due to the restriction of heat recovery technology, most of heat is not recycled utilization, in traditional iron ore direct reducing technology, high-temperature material after reduction produces secondary oxidation for avoiding in air, generally take high-temperature material directly into water, atomizing spray, vertical cooling and cartridge type cooling mode indirectly, make high-temperature material be cooled to normal temperature.Although these cooling means all can make high-temperature material drop to below 200 ℃, but the subject matter that these cooling procedures exist has: (1) high-temperature material is directly into the type of cooling of water and atomizing spray, the waste heat that exists material can not reclaim, water content consumption produces a large amount of dust-laden steam greatly and in cooling procedure, easily causes the problem of environmental pollution.(2) cartridge type indirectly cooling mode adopt a form for the outer water spray of cylinder, although it is cooling to carry out the anaerobic of high-temperature material, exist heat exchange efficiency low, can not effectively reclaim the problem of high-temperature material waste heat.(3) to adopt blast furnace gas to carry out cooling for vertical cooling mode, can in reclaiming high-temperature material waste heat, the calorific value of blast furnace gas is increased, but the granularity of solid material is had to certain restriction, can not the less material waste heat of recovery size.
Summary of the invention
The present invention is directed to and in high-temperature direct reduction material, contain a certain amount of excess carbon and quick lime, for making full use of high-temperature residual heat and the excess carbon in high-temperature direct reduction material, provide a kind of horizontal gasification cool furnace and for high-temperature direct reduction material gasification cooling means, solve and in Cooling Process, produced the problem of environmental pollution that a large amount of dust-laden steam causes, in high efficiente callback material waste heat, break through the restriction of the vertical type of cooling to high-temperature material granularity.
For reaching above-mentioned technique effect, the present invention adopts following technical scheme, a kind of horizontal gasification cool furnace: comprise charging door, gas exit, horizontal cooling device and discharging opening, the charging end of horizontal cooling device connects charging door and gas exit, discharge end connects discharging opening, and charging end level height is higher than discharge end; Horizontal cooling device is divided into high-temperature region, middle warm area and low-temperature space from charging end successively to discharge end, and high-temperature region arranges superheated steam entrance, and middle warm area arranges blast furnace gas entrance, and low-temperature space arranges boiler clothing and water injector, and horizontal cooling device is airtight construction.
Preferably, described horizontal cooling device is tubular, rotates around axis.
Preferably, described superheated steam entrance is around furnace wall annular spread, and blast furnace gas entrance is around furnace wall annular spread, and water injector is uniformly distributed in boiler clothing.
Horizontal gasification cool furnace is for high-temperature direct reduction material gasification cooling means, the direct-reduction material of 1000～1100 ℃ is added in horizontal gasification cool furnace, spray into superheated vapour in high-temperature region, spray into normal temperature blast furnace gas at middle warm area, directly spray water cooling at low-temperature space barrel.
Preferably, described superheated vapour pressure is that 0.4～0.6Mpa, temperature are 400～500 ℃, the air drying gas that blast-furnace gas pressure is 20～30Kpa.
Preferably, described high-temperature region operating temperature is 700～1100 ℃, and the superheated vapour spraying into is 400～500 ℃, and pressure is 0.4～0.6Mpa.
Preferably, described middle warm area operating temperature is 300～700 ℃, and the blast furnace gas spraying into is the air drying gas of air pressure 20～30Kpa.
Preferably, described low-temperature space operating temperature is below 300 ℃.
Preferably, described horizontal gasification cool furnace and be mainly applicable to the material of carbon cycle oxygenation direct-reduction explained hereafter for high-temperature direct reduction material gasification cooling means.
Preferably, the material of described carbon cycle oxygenation direct-reduction explained hereafter comprises: the metallization material after roasting, reducing agent, lime stone, wherein remaining reducing agent carbon content accounts for the 10-30% of direct-reduction material.
Preferably, described reducing agent comprises blue charcoal and or coke and or lump coal.
Beneficial effect of the present invention:
The invention provides horizontal gasification cool furnace and for high-temperature direct reduction material gasification cooling means, adopt horizontal gasification refrigerating mechanism that high-temperature direct reduction material is carried out to three sections of anaerobics cooling, spray into superheated vapour in high-temperature region respectively, spray into normal temperature blast furnace gas at middle warm area, carry out cooling at the direct water spray of low-temperature space barrel, solve and in Cooling Process, produced the problem of environmental pollution that a large amount of dust-laden steam causes, in high efficiente callback material waste heat, break through the restriction of the vertical type of cooling to high-temperature material granularity.
The present invention makes high-temperature direct reduction material under oxygen free condition, and temperature is reduced to below 200 ℃ from 1000～1100 ℃, and coal gas is elevated to 900～1000 ℃ from normal temperature, has realized waste heat recovery.
Carbon and superheated steam that the present invention realizes in high-temperature direct reduction material carry out gasification reaction, generate water-gas.
The present invention realizes the CO in carbon and the blast furnace gas in high-temperature direct reduction material
2reaction, increases the CO content in blast furnace gas, has improved the calorific value of blast furnace gas.
The present invention has expanded the cooling grade scope of high-temperature direct reduction material.
Accompanying drawing explanation
Fig. 1 is the structural representation of the horizontal gasification cool furnace of the present invention.
Wherein: 1, charging door; 2, gas exit; 3, horizontal cooling device; 4, discharging opening; 5, superheated steam entrance; 6, blast furnace gas entrance; 7, water injector.
The specific embodiment
As shown in Figure 1: a kind of horizontal gasification cool furnace: comprise charging door 1, gas exit 2, horizontal cooling device 3 and discharging opening 4, the charging end of horizontal cooling device 3 connects charging door 1 and gas exit 2, discharge end connects discharging opening 4, and charging end level height is higher than discharge end; Horizontal cooling device 3 is divided into high-temperature region, middle warm area and low-temperature space from charging end successively to discharge end, and high-temperature region arranges superheated steam entrance 5, and middle warm area arranges blast furnace gas entrance 6, and low-temperature space arranges boiler clothing and water injector 7, and horizontal cooling device is airtight construction.Horizontal cooling device 3 is tubular, rotates around axis.Superheated steam entrance is around furnace wall annular spread, and blast furnace gas entrance is around furnace wall annular spread, and water injector is uniformly distributed in boiler clothing.
When use, the direct-reduction material of 1000～1100 ℃ is added in horizontal gasification cool furnace, spray into superheated vapour in high-temperature region, spray into normal temperature blast furnace gas at middle warm area, directly spray water cooling at low-temperature space barrel.Superheated vapour pressure is that 0.4～0.6Mpa, temperature are 400～500 ℃, the air drying gas that blast-furnace gas pressure is 20～30Kpa.High-temperature region operating temperature is 700～1100 ℃, and the superheated vapour spraying into is 400～500 ℃, and pressure is 0.4～0.6Mpa.Middle warm area operating temperature is 300～700 ℃, and the blast furnace gas spraying into is the air drying gas of air pressure 20～30Kpa.Low-temperature space operating temperature is below 300 ℃.
The direct-reduction material of 1000～1100 ℃ of discharging from equipment of direct reduction such as rotary kilns, adds from the charging door of horizontal cooling device, and in horizontal cooling device rotary course, the high-temperature direct reduction material adding moves to discharge end from charging end.In the time that high-temperature direct reduction material moves to 700～1100 ℃ of high-temperature regions in horizontal cooling device, contact with the superheated steam that sprays into 400～500 ℃, in not changing material, quick lime activity degree in the situation that, make the carbon in direct-reduction material be generated H by superheated steam gasification
2with CO(water-gas).
In the time that direct-reduction material moves in 300～700 ℃ warm area in horizontal cooling device, contact with the air drying blast furnace gas spraying into (containing 10～20% CO2), carry out heat exchange.Meanwhile, the blast furnace gas after heat exchange enters high-temperature region, carries out gasification reaction with the carbon in direct-reduction material, and the CO content in blast furnace gas is increased, and has improved the calorific value of blast furnace gas.
In the time that direct-reduction material moves to low-temperature space below 300 ℃ in horizontal cooling device, by adjusting the cooling water inflow size of barrel, direct-reduction material carries out indirect heat exchange with a cooling water for the outer spray of cylinder, can make the temperature of direct-reduction material drop to 200 ℃ and discharge from discharge end below.
The present invention is in high efficiente callback material waste heat, break through the restriction of the vertical type of cooling to high-temperature material granularity, can be applicable to the material of most of carbon cycle oxygenation direct-reduction explained hereafter, the particularly metallization material after roasting, reducing agent (blue charcoal, coke, lump coal), lime stones etc., wherein to account for the direct-reduction material effect of 10-30% of direct-reduction material more obvious for remaining reducing agent carbon content.Adopt horizontal gasification refrigerating mechanism that high-temperature direct reduction material is carried out to three sections of anaerobics cooling, spray into superheated vapour in high-temperature region respectively, spray into normal temperature blast furnace gas at middle warm area, carry out cooling at the direct water spray of low-temperature space barrel, solve and in Cooling Process, produced the problem of environmental pollution that a large amount of dust-laden steam causes, in high efficiente callback material waste heat, break through the restriction of the vertical type of cooling to high-temperature material granularity.The present invention makes high-temperature direct reduction material under oxygen free condition, and temperature is reduced to below 200 ℃ from 1000～1100 ℃, and coal gas is elevated to 900～1000 ℃ from normal temperature, has realized waste heat recovery.Carbon and superheated steam that the present invention realizes in high-temperature direct reduction material carry out gasification reaction, generate water-gas.The present invention realizes the CO in carbon and the blast furnace gas in high-temperature direct reduction material
2reaction, increases the CO content in blast furnace gas, has improved the calorific value of blast furnace gas.
Above-described is only preferred embodiment of the present invention.Should be understood that for the person of ordinary skill of the art, under technology enlightenment provided by the present invention, as the common practise of this area, can also make other equivalent modifications and improvement, also should be considered as protection scope of the present invention.
Claims (10)
1. a horizontal gasification cool furnace: comprise charging door, gas exit, horizontal cooling device and discharging opening, it is characterized in that: the charging end of horizontal cooling device connects charging door and gas exit, discharge end connects discharging opening, and charging end level height is higher than discharge end; Horizontal cooling device is divided into high-temperature region, middle warm area and low-temperature space from charging end successively to discharge end, and high-temperature region arranges superheated steam entrance, and middle warm area arranges blast furnace gas entrance, and low-temperature space arranges boiler clothing and water injector, and horizontal cooling device is airtight construction.
2. a kind of horizontal gasification cool furnace according to claim 1, is characterized in that: described horizontal cooling device is tubular, rotates around axis.
3. a kind of horizontal gasification cool furnace according to claim 1, is characterized in that: described superheated steam entrance is around furnace wall annular spread, and blast furnace gas entrance is around furnace wall annular spread, and water injector is uniformly distributed in boiler clothing.
4. as described in claims 1 to 3, any one horizontal gasification cool furnace is used for high-temperature direct reduction material gasification cooling means, it is characterized in that: the direct-reduction material of 1000～1100 ℃ is added in horizontal gasification cool furnace, spray into superheated vapour in high-temperature region, spray into normal temperature blast furnace gas at middle warm area, directly spray water cooling at low-temperature space barrel.
5. horizontal gasification cool furnace is used for high-temperature direct reduction material gasification cooling means according to claim 4, it is characterized in that: described superheated vapour pressure is that 0.4～0.6Mpa, temperature are 400～500 ℃, the air drying gas that blast-furnace gas pressure is 20～30Kpa.
6. horizontal gasification cool furnace, for high-temperature direct reduction material gasification cooling means, is characterized in that: described high-temperature region operating temperature is 700～1100 ℃ according to claim 4, and the superheated vapour spraying into is 400～500 ℃, and pressure is 0.4～0.6Mpa.
7. horizontal gasification cool furnace, for high-temperature direct reduction material gasification cooling means, is characterized in that: described middle warm area operating temperature is 300～700 ℃ according to claim 4, and the blast furnace gas spraying into is the air drying gas of air pressure 20～30Kpa.
8. horizontal gasification cool furnace, for high-temperature direct reduction material gasification cooling means, is characterized in that: described low-temperature space operating temperature is below 300 ℃ according to claim 4.
9. horizontal gasification cool furnace, for high-temperature direct reduction material gasification cooling means, is characterized in that: described method is mainly applicable to the material of carbon cycle oxygenation direct-reduction explained hereafter according to claim 4.
10. horizontal gasification cool furnace is used for high-temperature direct reduction material gasification cooling means according to claim 4, it is characterized in that: the material of described carbon cycle oxygenation direct-reduction explained hereafter comprises: the metallization material after roasting, reducing agent, lime stone, wherein remaining reducing agent carbon content accounts for the 10-30% of direct-reduction material, and described reducing agent comprises blue charcoal and or coke and or lump coal.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114438272A (en) * | 2022-01-20 | 2022-05-06 | 酒泉钢铁(集团)有限责任公司 | Oxygen isolation method for cooling high-temperature direct reduction material of iron ore rotary kiln |
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| CN87107590A (en) * | 1986-10-16 | 1988-07-06 | 矿业朕会股份有限公司 | External-heat coal gasification method and implement the ebullated bed vapourizing furnace of this method |
| JPH0611268A (en) * | 1992-06-25 | 1994-01-21 | Kobe Steel Ltd | Cooling device for high temperature high pressure container |
| CN201809368U (en) * | 2010-06-24 | 2011-04-27 | 攀钢集团冶金工程技术有限公司 | Blast furnace coal gas cooling device |
| CN102345981A (en) * | 2010-08-03 | 2012-02-08 | 刘柏谦 | Sintering ore cooling device and waste heat recovery system thereof |
| CN103196297A (en) * | 2013-03-01 | 2013-07-10 | 武汉长海高新技术有限公司 | Device for recovering waste heat during cooling in ceramsite sand production |
| US20130205951A1 (en) * | 2012-02-15 | 2013-08-15 | Midrex Technologies, Inc. | Method and system for the production of direct reduced iron using a synthesis gas with a high carbon monoxide content |
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- 2014-01-28 CN CN201410041620.XA patent/CN103791719A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN87107590A (en) * | 1986-10-16 | 1988-07-06 | 矿业朕会股份有限公司 | External-heat coal gasification method and implement the ebullated bed vapourizing furnace of this method |
| JPH0611268A (en) * | 1992-06-25 | 1994-01-21 | Kobe Steel Ltd | Cooling device for high temperature high pressure container |
| CN201809368U (en) * | 2010-06-24 | 2011-04-27 | 攀钢集团冶金工程技术有限公司 | Blast furnace coal gas cooling device |
| CN102345981A (en) * | 2010-08-03 | 2012-02-08 | 刘柏谦 | Sintering ore cooling device and waste heat recovery system thereof |
| US20130205951A1 (en) * | 2012-02-15 | 2013-08-15 | Midrex Technologies, Inc. | Method and system for the production of direct reduced iron using a synthesis gas with a high carbon monoxide content |
| CN103196297A (en) * | 2013-03-01 | 2013-07-10 | 武汉长海高新技术有限公司 | Device for recovering waste heat during cooling in ceramsite sand production |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114438272A (en) * | 2022-01-20 | 2022-05-06 | 酒泉钢铁(集团)有限责任公司 | Oxygen isolation method for cooling high-temperature direct reduction material of iron ore rotary kiln |
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Application publication date: 20140514 |