CN207738795U - A kind of external-heat coal-based direct reduction iron shaft furnace discharge system - Google Patents
A kind of external-heat coal-based direct reduction iron shaft furnace discharge system Download PDFInfo
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- CN207738795U CN207738795U CN201721804402.2U CN201721804402U CN207738795U CN 207738795 U CN207738795 U CN 207738795U CN 201721804402 U CN201721804402 U CN 201721804402U CN 207738795 U CN207738795 U CN 207738795U
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- direct reduction
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Abstract
The utility model is related to a kind of external-heat coal-based direct reduction iron shaft furnace discharge systems, the external-heat coal-based direct reduction iron shaft furnace includes upright furnace body, the discharge system is connected to the lower section of upright bottom of furnace body support crossbeam, including sequentially connected eccentric deflector chute, blow-off valve, material buffer warehouse, stove external cooling device and secondary discharge control valve are once quantified, secondary discharge control valve connects device for transporting objects；It is equipped with rotor hopper in the primary valve body for quantifying blow-off valve and secondary discharge control valve, rotor hopper is driven by discharge motor, the material buffer warehouse is cavity slot type structure, the stove external cooling device uses membranous wall formula water-cooling structure, cooling wall including sealing, heat exchange metal tube is arranged outside cooling wall, and cooling water is passed through in the metal tube that exchanges heat.It is compact-sized it is reliable, take up little area, be with good investment, realize the large-scale production of direct-reduction iron product.It is particularly suitable for large-scale production, economic benefit and social benefit are notable.
Description
Technical field
The utility model is related to Material discharge device for vertical furnace, more particularly to a kind of external-heat coal-based direct reduction iron shaft furnace discharge system
System.
Background technology
Direct reduction processes of Iron ores, refer under the melting temperature less than iron ore, solid-state iron in ore oxide is straight
The technical process for being reduced into metallic iron is connect, product is called direct reduced iron (sponge iron) or metallized pellet.Direct-reduction
Iron can also be used as the techniques such as casting, ferroalloy, powder metallurgy as the pure raw material for smelting high-quality steel, special steel
Iron-bearing material.
Direct reduction iron making technique is largely divided into two kinds of gas-based reduction and coal base reduction.Gas-based reduction method is produced at present
Direct reduced iron account for 90% or more of direct reduced iron total output, but the production of gas base directly reducing iron is by natural gas resource
The influence for the factors such as domain distribution limits, investment operating cost is higher, prior art gas base directly reducing iron production capacity significant increase are difficult
Degree increases.Using widely distributed coal or the semicoke for being easy preparation as reducing agent, the ball for coordinating lump ore or fine ore to be fired into
Group is used as iron-bearing material, Coal-based Dri Technology technique metallurgical industry field obtain more and more concerns with it is practical
Property achievement.
Coal-based direct reduction iron process unit can be mainly divided into shaft furnace, rotary kiln, rotary hearth furnace, retort, tubular type at present
The concentrations such as stove.In numerous coal-based direct reduction iron techniques, most praised highly with shaft furnace technology.But the coal for practice of putting into production at present
In base shaft furnace production device, generally existing reduzate contacts with air during discharge and cooling down operation and secondary oxygen occurs
Change, while also because the current discharge scenario-frame complexity generally used, cooling-down effect, discharging efficiency are low, the degree of automation is not high
The shortcomings of, direct reduced iron large-scale production requirement cannot be met.
Invention content
The technical problem to be solved by the utility model is to provide a kind of external-heat coal-based direct reduction iron shaft furnace discharge systems
System, compact-sized, good cooling results, good airproof performance improve the quality of production and production efficiency of direct reduced iron, and meet direct
The requirement of reduced iron large-scale production.
To achieve the above object, the utility model is realized using following technical scheme：
A kind of external-heat coal-based direct reduction iron shaft furnace discharge system, the external-heat coal-based direct reduction iron shaft furnace include
Upright furnace body, the discharge system are connected to the lower section of upright bottom of furnace body support crossbeam, including sequentially connected eccentric guide
Slot once quantifies blow-off valve, material buffer warehouse, stove external cooling device and secondary discharge control valve, secondary discharge control valve connection
Device for transporting objects；It is equipped with rotor hopper, rotor material in the primary valve body for quantifying blow-off valve and secondary discharge control valve
Bucket is driven by discharge motor, and the material buffer warehouse is cavity slot type structure, and the stove external cooling device uses membranous wall formula water cooling
Structure includes the cooling wall of sealing, heat exchange metal tube is arranged outside cooling wall, cooling water is passed through in the metal tube that exchanges heat.
The eccentric deflector chute inner liner abrasive resistant plate, wearing plate surrounding are furnished with multigroup temperature-detecting device.
The rotor hopper is bucket capacity format structure, including rotor, is equipped in rotor circumference multigroup at helical arrangement
Format hopper.
The material buffer warehouse short transverse is equipped with multiple Non-contact type level gages.
The stove external cooling device exit is equipped with temperature-detecting device.
The device for transporting objects is that the scrapper conveyor with inert gas shielding and ribbon conveyer or closed vibrations are defeated
Material machine.
Compared with prior art, the utility model has the beneficial effects that：
(1) it once quantifies blow-off valve, the bucket capacity format valve that secondary discharge control valve is frequency control, both may be implemented to produce
The quantitative discharge of product, and can ensure the long uniformity declined to direction material, achieve the purpose that steady production, also has and realize
Quickly, the features such as accurately adjusting discharge velocity, high temperature resistant.Discharge and the adjustment of coal base shaft furnace production direct reduced iron can be met
The requirement of whole device produce load.
(2) material buffer warehouse is the slot type structure with level-sensing device, realizes and is reduced directly after iron product cooling by secondary discharge
Automatically controlling for valve and follow-up discharge system periodic running, reduces abrasion and the energy consumption of equipment to a certain extent.And
The material position that stove external cooling device may be implemented in a certain range adjusts and time control, to reach dump temperature in buffering stove
The effect of fluctuation.It can ensure that direct reduced iron carries out the residence time of reduction reaction, to ensure the production of direct reduced iron
Quality.
(3) stove external cooling device uses membranous wall formula water-cooling structure, completes high temperature reduction iron material and exchanges heat in metal tube
Recirculated water exchanges heat, and reduces reduced iron temperature of charge.Membranous wall formula cooler has good airproof performance, heat transfer property height, Temperature Distribution equal
Even, the features such as structural strength is high.
(4) discharge system is to be completely closed structure, and high-temperature direct reduced iron is avoided to be discharged and contacting sky in cooling procedure
Gas, secondary oxidation.
(5) the utility model rational technology realizes the closed cooling of shaft kiln directly reduced iron, stablizes discharge, automation control
It is horizontal high, labor intensity is reduced, environmental-protecting performance protrudes, and it is horizontal to improve producing equipment.And compact-sized reliable, occupation of land
It is small, with good investment, realize the large-scale production of direct-reduction iron product.It is particularly suitable for large-scale production, economic benefit and society imitate
It is beneficial notable.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the structural side view of the utility model.
Fig. 3 is once to quantify blow-off valve, secondary discharge control valve structure chart.
Fig. 4 is rotor hopper construction schematic diagram.
Fig. 5 is stove external cooling device structural schematic diagram.
In figure：Eccentric deflector chute 1 once quantifies blow-off valve 2, material buffer warehouse 3, stove external cooling device 4, secondary discharge control
Valve 5 processed, the contactless electromagnetic wave level-sensing device 6 of low level, high-order contactless electromagnetic wave level-sensing device 7, electric thermo-couple temperature detection device
One 8, electric thermo-couple temperature detection device 29, device for transporting objects 10, valve body 11, rotor hopper 12, rotor 13, format hopper 15,
Cooling wall 16, heat exchange metal tube 17.
Specific implementation mode
Specific embodiment of the present utility model is further illustrated below in conjunction with the accompanying drawings：
Such as Fig. 1-Fig. 4, a kind of external-heat coal-based direct reduction iron shaft furnace discharge system, the external-heat coal-based direct reduction
Iron shaft furnace includes upright furnace body, and the discharge system is connected to the lower section of upright bottom of furnace body support crossbeam, including is sequentially connected
Eccentric deflector chute 1, once quantify blow-off valve 2, material buffer warehouse 3, stove external cooling device 4 and secondary discharge control valve 5, it is secondary
Discharge control valve 5 connects device for transporting objects 10；
Eccentric deflector chute 1 is connected to the lower section of reduction shaft furnace room, 1 inner liner abrasive resistant plate of eccentric deflector chute, wearing plate surrounding cloth
There is multigroup temperature-detecting device.The coal-based direct reduction iron that temperature is 300~400 degree after cooling in stove enters eccentric guide
In slot 1.The connection of 1 discharge port of eccentric deflector chute once quantifies blow-off valve 2, and the chute of eccentric structure reduces furnace charge normal pressure to primary
The influence of quantitative blow-off valve 2.
It once quantifies 2 lower section of blow-off valve and connects material buffer warehouse 3, material buffer warehouse 3 is cavity slot type structure, material buffer
3 short transverse of storehouse is equipped with multiple Non-contact type level gages.3 lower section connection stove external cooling device 4 of material buffer warehouse, stove is cooling outside
Device 4 uses membranous wall formula water-cooling structure, includes the cooling wall 16 of sealing, 16 outside arrangement heat exchange metal tube 17 of cooling wall, heat exchange
It is passed through cooling water in metal tube 17.4 exit of stove external cooling device is equipped with temperature-detecting device.Direct reduced iron is by primary fixed
Amount blow-off valve 2, material buffer warehouse 3 enter stove external cooling device 4, and 100 degree or less are dropped to through indirect type of cooling temperature of charge.
4 lower section of stove external cooling device connects secondary discharge control valve 5.Once quantify blow-off valve 2 and secondary discharge control valve 5
Valve body 11 in be equipped with rotor hopper 12, rotor hopper 12 is bucket capacity format structure, including rotor 13, on 13 circumference of rotor
Equipped with multigroup format hopper 15 at helical arrangement.Rotor hopper is driven by discharge motor 14, and discharge motor 14 uses frequency conversion control
System.Blow-off valve 2 is once quantified continuously or discontinuously to run；Secondary discharge control valve 5 is timely according to the level signals of material buffer warehouse
Between add up setting automatic start-stop, intermittent duty.
5 lower section of secondary discharge control valve connects device for transporting objects.Pass through secondary discharge control again through material cooling outside stove
Valve 5 processed is expelled to subordinate's conveying device outward transport.
Embodiment
A kind of external-heat coal-based direct reduction iron shaft furnace discharge system, the external-heat coal-based direct reduction iron shaft furnace include
Upright furnace body, the discharge system are connected to the lower section of upright bottom of furnace body support crossbeam, including sequentially connected eccentric guide
Slot 1 once quantifies blow-off valve 2, material buffer warehouse 3, stove external cooling device 4 and secondary discharge control valve 5, secondary discharge control valve
5 connection device for transporting objects；
Eccentric deflector chute 1 is connected to the lower section of reduction shaft furnace room, 1 inner liner abrasive resistant plate of eccentric deflector chute, wearing plate surrounding cloth
There is multigroup electric thermo-couple temperature detection device 1.The coal-based direct reduction iron that temperature is 300~400 degree after cooling in stove into
Enter in eccentric deflector chute 1.The connection of 1 discharge port of eccentric deflector chute once quantifies blow-off valve 2, and the chute of eccentric structure is reducing furnace charge just
Pressure is to the once quantitatively influence of blow-off valve 2.
It once quantifies 2 lower section of blow-off valve and connects material buffer warehouse 3, material buffer warehouse 3 is cavity slot type structure, material buffer
High-order contactless electromagnetic wave level-sensing device 7 and the contactless electromagnetic wave level-sensing device of low level 6 are equipped in storehouse 3.3 lower section of material buffer warehouse
Stove external cooling device 4 is connected, stove external cooling device 4 uses membranous wall formula water-cooling structure, includes the cooling wall 16 of sealing, cooling wall 16
Outside arranges heat exchange metal tube 17, and cooling water is passed through in the metal tube 17 that exchanges heat.4 exit of stove external cooling device is equipped with thermocouple temperature
Spend detection device 29.Direct reduced iron is passed through by once quantitatively blow-off valve 2, material buffer warehouse 3 enter stove external cooling device 4
Indirect type of cooling temperature of charge drops to 100 degree or less.
4 lower section of stove external cooling device connects secondary discharge control valve 5.Once quantify blow-off valve 2 and secondary discharge control valve 5
Valve body 11 in be equipped with rotor hopper 12, rotor hopper 12 is bucket capacity format structure, including rotor 13, on 13 circumference of rotor
Equipped with multigroup format hopper 15 at helical arrangement.Rotor hopper is driven by discharge motor 14, and discharge motor 14 uses frequency conversion control
System.Blow-off valve 2 is once quantified continuously or discontinuously to run；Secondary discharge control valve 5 is timely according to the level signals of material buffer warehouse
Between add up setting automatic start-stop, intermittent duty.
5 lower section of secondary discharge control valve connects closed vibrations conveyer.Pass through secondary row again through material cooling outside stove
Material control valve 5 is expelled to closed vibrations conveyer outward transport.
It 5 lower section of secondary discharge control valve can be with the scrapper conveyor of connect band inert gas shielding, scrapper conveyor lower section connect band
Formula conveyer.
Described above is only the basic principle of the utility model, is not imposed any restrictions to the utility model, every foundation
The utility model carries out it equivalent variations and modification, within the scope of the art of this patent protection scheme.
Claims (6)
1. a kind of external-heat coal-based direct reduction iron shaft furnace discharge system, the external-heat coal-based direct reduction iron shaft furnace includes straight
Vertical furnace body, the discharge system are connected to the lower section of upright bottom of furnace body support crossbeam, which is characterized in that including sequentially connected
Eccentric deflector chute once quantifies blow-off valve, material buffer warehouse, stove external cooling device and secondary discharge control valve, secondary discharge control
Valve processed connects device for transporting objects；It is equipped with rotor material in the primary valve body for quantifying blow-off valve and secondary discharge control valve
Bucket, rotor hopper are driven by discharge motor, and the material buffer warehouse is cavity slot type structure, and the stove external cooling device uses film
Wall type water-cooling structure includes the cooling wall of sealing, heat exchange metal tube is arranged outside cooling wall, cooling is passed through in the metal tube that exchanges heat
Water.
2. a kind of external-heat coal-based direct reduction iron shaft furnace discharge system according to claim 1, which is characterized in that described
Eccentric deflector chute inner liner abrasive resistant plate, wearing plate surrounding is furnished with multigroup temperature-detecting device.
3. a kind of external-heat coal-based direct reduction iron shaft furnace discharge system according to claim 1, which is characterized in that described
Rotor hopper be bucket capacity format structure, including rotor is equipped with multigroup format hopper at helical arrangement in rotor circumference.
4. a kind of external-heat coal-based direct reduction iron shaft furnace discharge system according to claim 1, which is characterized in that described
Material buffer warehouse short transverse is equipped with multiple Non-contact type level gages.
5. a kind of external-heat coal-based direct reduction iron shaft furnace discharge system according to claim 1, which is characterized in that described
Stove external cooling device exit be equipped with temperature-detecting device.
6. a kind of external-heat coal-based direct reduction iron shaft furnace discharge system according to claim 1, which is characterized in that described
Device for transporting objects be the scrapper conveyor with inert gas shielding and ribbon conveyer or closed vibrations conveyer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721804402.2U CN207738795U (en) | 2017-12-21 | 2017-12-21 | A kind of external-heat coal-based direct reduction iron shaft furnace discharge system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721804402.2U CN207738795U (en) | 2017-12-21 | 2017-12-21 | A kind of external-heat coal-based direct reduction iron shaft furnace discharge system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207738795U true CN207738795U (en) | 2018-08-17 |
Family
ID=63118890
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721804402.2U Active CN207738795U (en) | 2017-12-21 | 2017-12-21 | A kind of external-heat coal-based direct reduction iron shaft furnace discharge system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207738795U (en) |
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2017
- 2017-12-21 CN CN201721804402.2U patent/CN207738795U/en active Active
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