CN106702066A - System and method for enabling hydrogen to enter gas-based reduction shaft furnace to prepare direct reduced iron - Google Patents
System and method for enabling hydrogen to enter gas-based reduction shaft furnace to prepare direct reduced iron Download PDFInfo
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- CN106702066A CN106702066A CN201710125131.6A CN201710125131A CN106702066A CN 106702066 A CN106702066 A CN 106702066A CN 201710125131 A CN201710125131 A CN 201710125131A CN 106702066 A CN106702066 A CN 106702066A
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/02—Making spongy iron or liquid steel, by direct processes in shaft furnaces
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- C—CHEMISTRY; METALLURGY
- C21—METALLURGY OF IRON
- C21B—MANUFACTURE OF IRON OR STEEL
- C21B13/00—Making spongy iron or liquid steel, by direct processes
- C21B13/0073—Selection or treatment of the reducing gases
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Abstract
The invention relates to a system and method for enabling hydrogen to enter a gas-based reduction shaft furnace to prepare direct reduced iron. In the system, a reduction section is located on the upper portion of the gas-based reduction shaft furnace, a cooling section is located on the lower portion of the gas-based reduction shaft furnace, the gas-based reduction shaft furnace is provided with a thermal state reducing gas inlet and a thermal state hydrogen inlet, the thermal state hydrogen inlet is located below the thermal state reducing gas inlet, and the thermal state hydrogen inlet and the thermal state reducing gas inlet are both arranged in the reduction section; a top gas inlet of a scrubbing-cooling device is connected with a top gas outlet of the gas-based reduction shaft furnace; a cooling top gas inlet of a compression device is connected with a cooling top gas outlet of the scrubbing-cooling device; a compressed top gas inlet of a hydrogen extraction device is connected with a compressed top gas outlet of the compression device; and a hydrogen inlet of a heating device is connected with a hydrogen outlet of the hydrogen extraction device, and a thermal state hydrogen outlet and a thermal state reducing gas outlet are connected with the thermal state hydrogen inlet and the thermal state reducing gas inlet of the gas-based reduction shaft furnace respectively. According to the system and method, due to the arrangement of the thermal state hydrogen inlet and the thermal state reducing gas inlet, gas and temperature distribution is more uniform, carbon deposition is eliminated, and blockage is avoided.
Description
Technical field
The present invention relates to metallurgical technology field, and in particular to a kind of hydrogen prepares DRI into gas-based reduction shaft furnace
System and method.
Background technology
DRI, also known as sponge iron, is a kind of important Dai Tied steel scrap and better than the steelmaking feed of steel scrap, can be dilute
The impurity element components in steel scrap are released, for electric furnace steel making provides essential pure iron material.Development of iron and steel enterprises is directly gone back
Former iron technology, the requirement that the epoch that can better adapt to develop to enterprise to densification, high efficiency, purifying direction.
2014, whole world DRI yield was 74,550,000 tons.Wherein, by accounting for that gas-based shaft kiln method is produced
80%.In the prior art, prepare DRI process using gas-based reduction shaft furnace and there are following problems：1. CO gas
During as also Primordial Qi reduction-oxidation pelletizing, it may occur that disproportionated reaction, substantial amounts of carbon dust is produced, hinders also Primordial Qi to enter in shaft furnace,
Influence the carrying out of reaction.2. cooling gas after gas-based reduction shaft furnace cooling section use, lowered the temperature, removed by discharge gas-based reduction shaft furnace
After dirt, pressurized treatments, it is back to use in gas-based reduction shaft furnace and is used as cooling gas again, its corollary equipment is relative complex, and changes
High-temperature cooling gas heat after heat is wasted, and is not effectively utilized.
The content of the invention
The present invention is intended to provide the system and method that a kind of hydrogen prepares DRI into gas-based reduction shaft furnace, pass through
Will be during also Primordial Qi and hydrogen each lead into gas-based reduction shaft furnace so that the distribution of air-flow and temperature is efficiently solved than more uniform
The problem that also Primordial Qi entrance carbon distribution blocks, production efficiency is higher.
The invention provides the system that a kind of hydrogen prepares DRI into gas-based reduction shaft furnace, including it is sequentially connected
Gas-based reduction shaft furnace, wash cooling device, compression set, carry hydrogen production device, heater；
The gas-based reduction shaft furnace includes the reduction section on top and the cooling section of bottom, with hot also Primordial Qi entrance, heat
State hydrogen inlet, iron acid pellet entrance, DRI outlet, top gas outlet；Wherein, the hot hydrogen inlet and institute
State hot also Primordial Qi entrance and be arranged on the reduction section, the hot hydrogen inlet is located under the hot also Primordial Qi entrance
Side；
There is the wash cooling device top gas entrance, cooling top gas to export；The top gas entrance and the gas
The top gas outlet connection of base reduction shaft furnace；
The compression set has cooling top gas entrance, compression top gas outlet；Cooling top gas entrance and the institute
State the cooling top gas outlet connection of wash cooling device；
The hydrogen production device that carries has compression top gas entrance, hydrogen outlet, rich CO gas outlet；The compression stove
Top gas entrance is connected with the compression top gas outlet of the compression set；
There is the heater hydrogen inlet, also Primordial Qi entrance, hot hydrogen outlet, hot also Primordial Qi to export；It is described
Hydrogen inlet is connected with the hydrogen outlet for carrying hydrogen production device, and the hot hydrogen outlet is hot with the gas-based reduction shaft furnace
Hydrogen inlet is connected, and hot also Primordial Qi outlet is connected with the hot also Primordial Qi entrance of the gas-based reduction shaft furnace.
Preferably, the hot hydrogen inlet is located at 0.3~0.6m below the hot also Primordial Qi entrance.
Further, said system also includes desulfurization and decarburization device, for receiving the compression discharged by the compression set
Top gas, carries out desulfurization and decarburization treatment；
The desulfurization and decarburization device is connected with the compression set and the hydrogen production device that carries.
Further, the gas-based reduction shaft furnace and the heater have rich carbon monoxide gas inlet, the richness
Carbon monoxide gas inlet is connected with the rich CO gas outlet for carrying hydrogen production device.
DRI is prepared into gas-based reduction shaft furnace using hydrogen according to said system present invention also offers one kind
Method, including step：
After the scrubbed cooling of top gas, the compression of the gas-based reduction shaft furnace discharge, carried described in feeding in hydrogen production device, separated
Obtain hydrogen and rich CO gas；
By in the hydrogen feeding heater, hot hydrogen is obtained.Meanwhile, to feeding in the heater also
Primordial Qi, obtains hot also Primordial Qi.
By the hot hydrogen via in the hot hydrogen inlet feeding gas-based reduction shaft furnace.Will it is described it is hot also
Primordial Qi is sent into the gas-based reduction shaft furnace via the hot also Primordial Qi entrance.
During iron acid pellet sent into the gas-based reduction shaft furnace, the iron acid pellet and hot also Primordial Qi and the heat
State hydrogen reacts, and obtains DRI.
Preferably, the temperature of the hot also Primordial Qi is 850~950 DEG C.
Preferably, the temperature of the hot hydrogen is 850~950 DEG C.
Further, the described rich CO gas of 50~60% volume ratios are sent into the cold of the gas-based reduction shaft furnace
But in section, as cooling gas.
Further, CO and H in the also Primordial Qi2Volume account for the percentage ＞ 90% of the also Primordial Qi cumulative volume.
Further, H in the also Primordial Qi2Volume ratio with CO is：H2/ CO=1.0~3.0.
In system and method for the invention, hydrogen is sent directly into gas-based reduction shaft furnace iron acid pellet is gone back
Original, reduction reaction heat absorption can effectively using the sensible heat of hot direct reduced iron, and the reduzate for obtaining is difficult to bond, and reacts
Journey is pollution-free, will not block hydrogen inlet.
The quantity of hot hydrogen inlet and hot also Primordial Qi entrance is disposed as multiple by the present invention, can make gas therein
It is more uniform with Temperature Distribution so that the reduction of acid pellet is more abundant.Also, hot hydrogen inlet is arranged on hot going back
The underface of Primordial Qi entrance.The high-temperature vapor that hydrogen reducing acid pellet process is produced can be by hot also Primordial Qi porch
Carbon distribution is eliminated, it is to avoid carbon distribution excessively causes air-flow not smooth.
In the method for the present invention, the isolated rich CO gas of furnace roof air lift hydrogen are divided into two parts.A part
For the cooling gas of gas-based reduction shaft furnace, quickly using the sensible heat of cooling section hot direct reduced iron, and carburizing can occur with it
Reaction, is remarkably improved the phosphorus content in DRI, so as to reduce molten point of processing load, reducing energy consumption of postorder.Remaining
Partial rich CO gas heat other gases as the fuel gas of heater using combustion heat value.
Brief description of the drawings
Fig. 1 is the system schematic that hydrogen prepares DRI into gas-based reduction shaft furnace in the present invention.
Fig. 2 is the method flow schematic diagram that the present invention prepares DRI using the system shown in Fig. 1.
Reference in accompanying drawing is as follows：
1st, gas-based reduction shaft furnace, 101, reduction section, 102, cooling section；
2nd, wash cooling device；
3rd, compression set；
4th, desulfurization and decarburization device；
5th, hydrogen production device is carried；
6th, heater.
Specific embodiment
Below in conjunction with drawings and Examples, specific embodiment of the invention is described in more details, so as to energy
Enough more fully understand the solution of the present invention and the advantage of its various aspects.However, specific embodiments described below and reality
It is only descriptive purpose to apply example, rather than limitation of the present invention.
The invention discloses a kind of hydrogen into the system that DRI is prepared in gas-based reduction shaft furnace.Fig. 1 is for this
The schematic diagram of system, system includes gas-based reduction shaft furnace 1, wash cooling device 2, compression set 3, carries hydrogen production device 5, heater
6。
Gas-based reduction shaft furnace 1 includes the reduction section 101 on top and the cooling section 102 of bottom.Set on gas-based reduction shaft furnace 1
There are hot also Primordial Qi entrance, hot hydrogen inlet, rich carbon monoxide gas inlet, iron acid pellet entrance, DRI to go out
Mouth, top gas outlet.
In the present invention, the quantity of hot hydrogen inlet and hot also Primordial Qi entrance is set as 6~10.Inventor passes through
Lot of experiment validation, finds to be arranged on hot hydrogen inlet at the hot 0.3~0.6m gone back below Primordial Qi entrance, with preferable
Reaction efficiency.
In the present invention, multiple hot hydrogen inlets can be located at it is hot also Primordial Qi entrance underface, also can not in underface,
It can be 5 °~10 ° by the angle initialization of each hot also Primordial Qi entrance and hot hydrogen inlet.Because being passed through gas-based reduction shaft furnace
The pressure of hot hydrogen and hot also Primordial Qi in 1 is 0.1~0.2MPa.Also, hot hydrogen is being passed through with hot also Primordial Qi
Before gas-based reduction shaft furnace 1, gas pressure is bigger than the pressure in gas-based reduction shaft furnace 1, to ensure hot also Primordial Qi and hot
Hydrogen smoothly can enter in gas-based reduction shaft furnace 1.Because gas pressure is big, and hot also Primordial Qi entrance and hot hydrogen inlet
Gather on the endless tube of gas-based reduction shaft furnace 1, cause hot also Primordial Qi and hot hydrogen after gas-based reduction shaft furnace 1 is entered, expand
Dissipate speed.Therefore, 6~10 hot hydrogen inlets and 6~10 hot also Primordial Qi entrances in the present invention, it is not necessary on
It is lower strict just to position.In different embodiments of the invention, it is ensured that hot hydrogen inlet is arranged on hot also Primordial Qi entrance
Lower section.
Wash cooling device 2 has top gas entrance, cooling top gas outlet.Wherein, top gas entrance and gas-based reduction
The top gas outlet connection of shaft furnace 1.
Compression set 3 has cooling top gas entrance, compression top gas outlet.Wherein, cooling top gas entrance and washing
The cooling top gas outlet connection of cooling device 2.
Carrying hydrogen production device 5 has compression top gas entrance, hydrogen outlet, rich CO gas outlet.Wherein, furnace roof is compressed
Gas entrance is connected with the compression top gas outlet of compression set 3.Rich CO gas outlet and rich the one of gas-based reduction shaft furnace 1
Carbon oxide gas entrance is connected.
Heater 6 has hydrogen inlet, also Primordial Qi entrance, rich carbon monoxide gas inlet, hot hydrogen outlet, hot
Also Primordial Qi outlet.Wherein, hydrogen inlet is connected with the hydrogen outlet for carrying hydrogen production device 5.Hot hydrogen outlet and gas-based reduction shaft furnace 1
Hot hydrogen inlet connection.The outlet of hot also Primordial Qi is connected with the hot also Primordial Qi entrance of gas-based reduction shaft furnace 1.Rich one aoxidizes
Carbon gas access exports with the rich CO gas for carrying hydrogen production device 5 and is connected.
In different embodiments of the invention, also including desulfurization and decarburization device 4.Desulfurization and decarburization device 4 is used to receive by pressing
The compression top gas of the discharge of compression apparatus 3, carries out desulfurization and decarburization treatment.Also, desulfurization and decarburization device 4 and compression set 3 and carry
Hydrogen production device 5 is connected.The processing requirement of the compression top gas for being provided for meeting different demands of desulfurization and decarburization device 4.
System according to Fig. 1, enters gas-based reduction shaft furnace and prepares direct-reduction the invention also discloses a kind of hydrogen
The method of iron.The schematic flow sheet of the method is shown in Fig. 2, comprises the following steps：
(1) in the top gas of the top of gas-based reduction shaft furnace 1 discharge being sequentially sent into wash cooling device 2, compression set 3,
Wash cooling, compression treatment are carried out, obtains compressing top gas.Will be during compression top gas feeding carries hydrogen production device 5.Wherein, top gas
The gaseous mixture of gas is newly produced for also Primordial Qi and reduction reaction that reduction reaction does not occur in gas-based reduction shaft furnace 1.Compression furnace roof
Gas is isolated to hydrogen and rich CO gas in hydrogen production device 5 is carried.
In top gas of the invention, CO and H2Volume account for the percentage ＞ 70% of top gas cumulative volume.
In different embodiments of the invention, step was also included before compression top gas feeding is carried into hydrogen production device 5：Will compression
Desulfurization and decarburization treatment is carried out in top gas feeding desulfurization and decarburization device 4, to meet requirement and the property of top gas in different embodiments
Matter.
(2) by hydrogen feeding heater 6, hot hydrogen is obtained.Meanwhile, to the also Primordial Qi of feeding in the heater 6,
Obtain hot also Primordial Qi.Wherein, the temperature of hot hydrogen is 850~950 DEG C.The temperature of hot also Primordial Qi is 850~950 DEG C.
The also Primordial Qi that the present invention is used is the one kind in natural gas, coke-stove gas, the reformation gas of coal bed gas or coal gas.And
And, also CO and H in Primordial Qi2Volume account for also Primordial Qi cumulative volume percentage ＞ 90%.Wherein, H2Volume ratio with CO is：H2/
CO=1.0~3.0.
(3) hot hydrogen, hot reduction qi leel gas base is not sent into also via hot hydrogen inlet, hot also Primordial Qi entrance
In former shaft furnace 1.
Due to containing methane or carbon monoxide in hot also Primordial Qi, in hot also Primordial Qi entrance as the carrying out of reaction is easy
Excessive carbon distribution is produced, causes gas constricted flow, the carrying out reacted in influence gas-based reduction shaft furnace.
Meanwhile, during hot hydrogen reducing iron acid pellet, high-temperature water vapor can be produced.High-temperature water vapor can be gone back with hot
Primordial Qi porch carbon distribution reaction, it is to avoid because carbon distribution excessively caused by it is hot also Primordial Qi blocked inlet, cause air-flow not smooth, influence it is whole
The normal operation of individual reaction.
(4) by iron acid pellet from furnace roof feeding gas-based reduction shaft furnace 1.Iron acid pellet and hot also Primordial Qi and hot
Hydrogen reacts, and obtains DRI, and discharge top gas.After the DRI for obtaining is cooled down through cooling section 102, from gas base
The bottom discharge of reduction shaft furnace 1.
The acid pellet that the present invention is selected is prepared by lateritic nickel ore, iron ore concentrate etc..In course of reaction, control gas-based reduction is erected
The operating pressure of stove 1 is 0.1~0.2MPa.
The characteristics of there is CO gas the combustion heat and specific heat capacity little Yi to cool down.In the present invention, compression top gas is being carried
Isolated rich CO gas in hydrogen production device 5, take the rich CO gas feeding gas-based reduction of 50~60% volume ratios
In the cooling section 102 of shaft furnace 1, as cooling gas.In the present invention, rich CO gas are conveyed from the bottom of cooling section 102
Into gas-based reduction shaft furnace 1.Rich CO gas carry out heat exchange with the hot direct reduced iron for wherein generating, and ooze
Carbon is reacted, and reduction section 101 is flowed into then up, further carries out reduction reaction.Remaining rich CO gas can use
Make the fuel gas of heater 6, it is also possible to make other any purposes for being adapted to richness CO gas.
Embodiment 1
Also Primordial Qi, wherein CO and H are so incensed that by gas renormalizing2Volume account for also Primordial Qi cumulative volume 92%, H2/ CO=
1.8.The hydrogen that also Primordial Qi is obtained with furnace roof air lift hydrogen is 900 DEG C by heating stove heat, temperature, respectively by hot also Primordial Qi
Entrance and hot hydrogen inlet enter gas-based reduction shaft furnace.
Hot also Primordial Qi entrance is at 0.4m directly over hot hydrogen inlet.Hot also Primordial Qi enters reduction by 6 entrances
Section.Hot hydrogen inlet is also equipped with 6.Hot also Primordial Qi forms convection current with iron acid pellet from top to bottom, and fully connects
Touch, reduction carburization reaction occurs, obtain the DRI and top gas of case-carbonizing, and may be produced in hot also Primordial Qi entrance
The a small amount of carbon distribution of life.Methane also in Primordial Qi is reformed with carbon dioxide or water vapour by the metal catalytic in DRI, generation
CO and H2, being capable of reduced iron acid pellet.From the hot hydrogen that hot hydrogen inlet is passed through, the iron oxidation that will be reduced sufficiently
Pelletizing is reduced, and the water vapour of generation reacts with the carbon distribution of hot also Primordial Qi entrance and generates CO and H2, continue for iron to aoxidize ball
Group's reduction.
After top gas is through dedusting of lowering the temperature, compression, desulfurization and decarburization treatment, into hydrogen production device is carried, hydrogen and a rich oxidation are obtained
Carbon gas.The rich CO gas of 40% volume as heating furnace fuel gas.The rich CO gas of 60% volume are made
For cooling section cools down gas, after carrying out heat exchange and carburization reaction with hot direct reduced iron, it is upwardly into reduction section and is reduced
Reaction.
DRI is cooled down in cooling section, is discharged via gas-based reduction shaft furnace bottom.
Embodiment 2
Also Primordial Qi, wherein CO and H are so incensed that by gas renormalizing2Volume account for also Primordial Qi cumulative volume 90%, H2/ CO=
2.3.The hydrogen that also Primordial Qi is obtained with furnace roof air lift hydrogen is 900 DEG C by heating stove heat, temperature, respectively by hot also Primordial Qi
Entrance and hot hydrogen inlet enter gas-based reduction shaft furnace.
Hot also Primordial Qi entrance is at 0.5m directly over hot hydrogen inlet.Hot also Primordial Qi enters reduction by 8 entrances
Section.Hot hydrogen inlet is also equipped with 8.Hot also Primordial Qi forms convection current with iron acid pellet from top to bottom, and fully connects
Touch, reduction carburization reaction occurs, obtain the DRI and top gas of case-carbonizing, and may be produced in hot also Primordial Qi entrance
The a small amount of carbon distribution of life.Methane in hot also Primordial Qi is reformed with carbon dioxide or water vapour by the metal catalytic in DRI,
Generation CO and H2, being capable of reduced iron acid pellet.From the hot hydrogen that hot hydrogen inlet is passed through, the iron that will be reduced sufficiently
Acid pellet is reduced, and the water vapour of generation reacts with the carbon distribution of hot also Primordial Qi entrance and generates CO and H2, continue iron oxygen
Pellet is reduced.
After top gas is through dedusting of lowering the temperature, compression, desulfurization and decarburization treatment, into hydrogen production device is carried, hydrogen and a rich oxidation are obtained
Carbon gas.The rich CO gas of 45% volume as heating furnace fuel gas.The rich CO gas of 55% volume are made
For cooling section cools down gas, after carrying out heat exchange and carburization reaction with hot direct reduced iron, it is upwardly into reduction section and is reduced
Reaction.
DRI is cooled down in cooling section, is discharged via gas-based reduction shaft furnace bottom.
Embodiment 3
Also Primordial Qi, wherein CO and H are obtained by coal gas2Volume account for also Primordial Qi cumulative volume 91%, H2/ CO=1.0.Also
The hydrogen that Primordial Qi and furnace roof air lift hydrogen are obtained is 850 DEG C by heating stove heat, temperature, respectively by hot hydrogen entrance and hot
Also Primordial Qi entrance enters gas-based reduction shaft furnace.
Hot also Primordial Qi entrance is at 0.3m directly over hot hydrogen inlet.Hot also Primordial Qi enters reduction by 7 entrances
Section.Hot hydrogen inlet is also equipped with 7.Hot also Primordial Qi forms convection current with iron acid pellet from top to bottom, and fully connects
Touch, reduction carburization reaction occurs, obtain the DRI and top gas of case-carbonizing, and may be produced in hot also Primordial Qi entrance
The a small amount of carbon distribution of life.Methane in hot also Primordial Qi is reformed with carbon dioxide or water vapour by the metal catalytic in DRI,
Generation CO and H2, being capable of reduced iron acid pellet.From the hot hydrogen that hot hydrogen inlet is passed through, the iron that will be reduced sufficiently
Acid pellet is reduced, and the water vapour of generation reacts with the carbon distribution of hot also Primordial Qi entrance and generates CO and H2, continue iron oxygen
Pellet is reduced.
After top gas is through dedusting of lowering the temperature, compression, desulfurization and decarburization treatment, into hydrogen production device is carried, hydrogen and a rich oxidation are obtained
Carbon gas.The rich CO gas of 50% volume as heating furnace fuel gas.The rich CO gas of 50% volume are made
For cooling section cools down gas, after carrying out heat exchange and carburization reaction with hot direct reduced iron, it is upwardly into reduction section and is reduced
Reaction.
DRI is cooled down in cooling section, is discharged via gas-based reduction shaft furnace bottom.
Embodiment 4
Reformed by coal bed gas and be so incensed that also Primordial Qi, wherein CO and H2Volume account for also Primordial Qi cumulative volume 92%, H2/ CO=
3.0.The hydrogen that also Primordial Qi is obtained with furnace roof air lift hydrogen is 950 DEG C by heating stove heat, temperature, respectively by hot also Primordial Qi
Entrance and hot hydrogen inlet enter gas-based reduction shaft furnace.
Hot also Primordial Qi entrance is at 0.6m directly over hot hydrogen inlet.Hot also Primordial Qi enters reduction by 10 entrances
Section.Hot hydrogen inlet is also equipped with 10.Hot also Primordial Qi forms convection current with iron acid pellet from top to bottom, and fully connects
Touch, reduction carburization reaction occurs, obtain the DRI and top gas of case-carbonizing, and may be produced in hot also Primordial Qi entrance
The a small amount of carbon distribution of life.Methane in hot also Primordial Qi is reformed with carbon dioxide or water vapour by the metal catalytic in DRI,
Generation CO and H2, being capable of reduced iron acid pellet.From the hot hydrogen that hot hydrogen inlet is passed through, the iron that will be reduced sufficiently
Acid pellet is reduced, and the water vapour of generation reacts with the carbon distribution of hot also Primordial Qi entrance and generates CO and H2, continue iron oxygen
Pellet is reduced.
After top gas is through dedusting of lowering the temperature, compression, desulfurization and decarburization treatment, into hydrogen production device is carried, hydrogen and a rich oxidation are obtained
Carbon gas.The rich CO gas of 47% volume as heating furnace fuel gas.The rich CO gas of 53% volume are made
For cooling section cools down gas, after carrying out heat exchange and carburization reaction with hot direct reduced iron, it is upwardly into reduction section and is reduced
Reaction.
DRI is cooled down in cooling section, is discharged via gas-based reduction shaft furnace bottom.
Finally it should be noted that：Obviously, above-described embodiment is only intended to clearly illustrate example of the present invention, and simultaneously
The non-restriction to implementation method.For those of ordinary skill in the field, can also do on the basis of the above description
Go out the change or variation of other multi-forms.There is no need and unable to be exhaustive to all of implementation method.And thus drawn
Obvious change that Shen goes out or among changing still in protection scope of the present invention.
Claims (10)
1. the system that a kind of hydrogen prepares DRI into gas-based reduction shaft furnace, it is characterised in that including what is be sequentially connected
Gas-based reduction shaft furnace, wash cooling device, compression set, carry hydrogen production device, heater；
The gas-based reduction shaft furnace includes the reduction section on top and the cooling section of bottom, with hot also Primordial Qi entrance, hot hydrogen
Gas entrance, iron acid pellet entrance, DRI outlet, top gas outlet；Wherein, the hot hydrogen inlet and the heat
State also Primordial Qi entrance is arranged on the reduction section, and the hot hydrogen inlet is located at the lower section of the hot also Primordial Qi entrance；
There is the wash cooling device top gas entrance, cooling top gas to export；The top gas entrance is with the gas base also
The top gas outlet connection of former shaft furnace；
The compression set has cooling top gas entrance, compression top gas outlet；The cooling top gas entrance is washed with described
Wash the cooling top gas outlet connection of cooling device；
The hydrogen production device that carries has compression top gas entrance, hydrogen outlet, rich CO gas outlet；The compression top gas
Entrance is connected with the compression top gas outlet of the compression set；
There is the heater hydrogen inlet, also Primordial Qi entrance, hot hydrogen outlet, hot also Primordial Qi to export；The hydrogen
Entrance is connected with the hydrogen outlet for carrying hydrogen production device, the hot hydrogen of the hot hydrogen outlet and the gas-based reduction shaft furnace
Entrance is connected, and hot also Primordial Qi outlet is connected with the hot also Primordial Qi entrance of the gas-based reduction shaft furnace.
2. system according to claim 1, it is characterised in that the hot hydrogen inlet is located at the hot also Primordial Qi and enters
At 0.3~0.6m below mouthful.
3. system according to claim 1, it is characterised in that also including desulfurization and decarburization device；The desulfurization and decarburization device
It is connected with the compression set and the hydrogen production device that carries.
4. system according to claim 1, it is characterised in that the gas-based reduction shaft furnace and the heater have richness
Carbon monoxide gas inlet, the rich carbon monoxide gas inlet is exported with the rich CO gas for carrying hydrogen production device and connected
Connect.
5. a kind of system according to one of claim 1-4, enters gas-based reduction shaft furnace and prepares direct-reduction using hydrogen
The method of iron, it is characterised in that including step：
It is isolated in carrying hydrogen production device described in feeding after the scrubbed cooling of top gas, the compression of gas-based reduction shaft furnace discharge
Hydrogen and rich CO gas；
By in the hydrogen feeding heater, hot hydrogen is obtained；Meanwhile, reduced to being sent into the heater
Gas, obtains hot also Primordial Qi；
During the hot hydrogen sent into the gas-based reduction shaft furnace via the hot hydrogen inlet, will be described hot and Primordial Qi
Via in the hot also Primordial Qi entrance feeding gas-based reduction shaft furnace；
During iron acid pellet sent into the gas-based reduction shaft furnace, the iron acid pellet and hot also Primordial Qi and the hot hydrogen
Solid/liquid/gas reactions, obtain DRI.
6. method according to claim 5, it is characterised in that the temperature of the hot also Primordial Qi is 850~950 DEG C.
7. method according to claim 5, it is characterised in that the temperature of the hot hydrogen is 850~950 DEG C.
8. method according to claim 5, it is characterised in that by the described rich CO gas of 50~60% volume ratios
In sending into the cooling section of the gas-based reduction shaft furnace, as cooling gas.
9. method according to claim 5, it is characterised in that CO and H in the also Primordial Qi2Volume account for the also Primordial Qi
The percentage ＞ 90% of cumulative volume.
10. method according to claim 5, it is characterised in that H in the also Primordial Qi2Volume ratio with CO is：H2/ CO=
1.0~3.0.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108998611A (en) * | 2018-09-12 | 2018-12-14 | 北京安康科创节能环保科技有限公司 | Gas-based shaft kiln, gas-based reduction acid pellet system and the method using the system |
| CN109182634A (en) * | 2018-09-20 | 2019-01-11 | 中晋冶金科技有限公司 | A kind of efficiently gas-based shaft kiln directly reduced ironmaking system and method |
| CN109913606A (en) * | 2019-03-27 | 2019-06-21 | 东北大学 | A kind of coal hydrogen shaft furnace ironmaking system and technique based on induction heating |
| CN109971906A (en) * | 2019-04-11 | 2019-07-05 | 中冶赛迪技术研究中心有限公司 | A kind of restoring method of ultralow carbon emission production sponge iron |
| CN112899427A (en) * | 2021-01-15 | 2021-06-04 | 东北大学 | Hydrogen shaft furnace iron making system and method using electric energy for heating |
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| CN109182634B (en) * | 2018-09-20 | 2023-08-15 | 中晋冶金科技有限公司 | Efficient gas-based shaft furnace direct reduction iron-making system and method |
| CN109913606A (en) * | 2019-03-27 | 2019-06-21 | 东北大学 | A kind of coal hydrogen shaft furnace ironmaking system and technique based on induction heating |
| CN109971906A (en) * | 2019-04-11 | 2019-07-05 | 中冶赛迪技术研究中心有限公司 | A kind of restoring method of ultralow carbon emission production sponge iron |
| CN112899427A (en) * | 2021-01-15 | 2021-06-04 | 东北大学 | Hydrogen shaft furnace iron making system and method using electric energy for heating |
| CN112899427B (en) * | 2021-01-15 | 2022-02-11 | 东北大学 | Hydrogen shaft furnace iron making system and method using electric energy for heating |
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